Microsoft.Compute virtualMachineScaleSets 2021-07-01

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Bicep resource definition

The virtualMachineScaleSets resource type can be deployed with operations that target:

• Resource groups - See resource group deployment commands

For a list of changed properties in each API version, see change log.

Resource format

To create a Microsoft.Compute/virtualMachineScaleSets resource, add the following Bicep to your template.

resource symbolicname 'Microsoft.Compute/virtualMachineScaleSets@2021-07-01' = {
  name: 'string'
  location: 'string'
  tags: {
    tagName1: 'tagValue1'
    tagName2: 'tagValue2'
  }
  sku: {
    capacity: int
    name: 'string'
    tier: 'string'
  }
  extendedLocation: {
    name: 'string'
    type: 'EdgeZone'
  }
  identity: {
    type: 'string'
    userAssignedIdentities: {
      {customized property}: {}
    }
  }
  plan: {
    name: 'string'
    product: 'string'
    promotionCode: 'string'
    publisher: 'string'
  }
  properties: {
    additionalCapabilities: {
      hibernationEnabled: bool
      ultraSSDEnabled: bool
    }
    automaticRepairsPolicy: {
      enabled: bool
      gracePeriod: 'string'
    }
    doNotRunExtensionsOnOverprovisionedVMs: bool
    hostGroup: {
      id: 'string'
    }
    orchestrationMode: 'string'
    overprovision: bool
    platformFaultDomainCount: int
    proximityPlacementGroup: {
      id: 'string'
    }
    scaleInPolicy: {
      forceDeletion: bool
      rules: [
        'string'
      ]
    }
    singlePlacementGroup: bool
    spotRestorePolicy: {
      enabled: bool
      restoreTimeout: 'string'
    }
    upgradePolicy: {
      automaticOSUpgradePolicy: {
        disableAutomaticRollback: bool
        enableAutomaticOSUpgrade: bool
      }
      mode: 'string'
      rollingUpgradePolicy: {
        enableCrossZoneUpgrade: bool
        maxBatchInstancePercent: int
        maxUnhealthyInstancePercent: int
        maxUnhealthyUpgradedInstancePercent: int
        pauseTimeBetweenBatches: 'string'
        prioritizeUnhealthyInstances: bool
      }
    }
    virtualMachineProfile: {
      applicationProfile: {
        galleryApplications: [
          {
            configurationReference: 'string'
            order: int
            packageReferenceId: 'string'
            tags: 'string'
          }
        ]
      }
      billingProfile: {
        maxPrice: json('decimal-as-string')
      }
      capacityReservation: {
        capacityReservationGroup: {
          id: 'string'
        }
      }
      diagnosticsProfile: {
        bootDiagnostics: {
          enabled: bool
          storageUri: 'string'
        }
      }
      evictionPolicy: 'string'
      extensionProfile: {
        extensions: [
          {
            name: 'string'
            properties: {
              autoUpgradeMinorVersion: bool
              enableAutomaticUpgrade: bool
              forceUpdateTag: 'string'
              protectedSettings: any()
              provisionAfterExtensions: [
                'string'
              ]
              publisher: 'string'
              settings: any()
              suppressFailures: bool
              type: 'string'
              typeHandlerVersion: 'string'
            }
          }
        ]
        extensionsTimeBudget: 'string'
      }
      licenseType: 'string'
      networkProfile: {
        healthProbe: {
          id: 'string'
        }
        networkApiVersion: '2020-11-01'
        networkInterfaceConfigurations: [
          {
            id: 'string'
            name: 'string'
            properties: {
              deleteOption: 'string'
              dnsSettings: {
                dnsServers: [
                  'string'
                ]
              }
              enableAcceleratedNetworking: bool
              enableFpga: bool
              enableIPForwarding: bool
              ipConfigurations: [
                {
                  id: 'string'
                  name: 'string'
                  properties: {
                    applicationGatewayBackendAddressPools: [
                      {
                        id: 'string'
                      }
                    ]
                    applicationSecurityGroups: [
                      {
                        id: 'string'
                      }
                    ]
                    loadBalancerBackendAddressPools: [
                      {
                        id: 'string'
                      }
                    ]
                    loadBalancerInboundNatPools: [
                      {
                        id: 'string'
                      }
                    ]
                    primary: bool
                    privateIPAddressVersion: 'string'
                    publicIPAddressConfiguration: {
                      name: 'string'
                      properties: {
                        deleteOption: 'string'
                        dnsSettings: {
                          domainNameLabel: 'string'
                        }
                        idleTimeoutInMinutes: int
                        ipTags: [
                          {
                            ipTagType: 'string'
                            tag: 'string'
                          }
                        ]
                        publicIPAddressVersion: 'string'
                        publicIPPrefix: {
                          id: 'string'
                        }
                      }
                      sku: {
                        name: 'string'
                        tier: 'string'
                      }
                    }
                    subnet: {
                      id: 'string'
                    }
                  }
                }
              ]
              networkSecurityGroup: {
                id: 'string'
              }
              primary: bool
            }
          }
        ]
      }
      osProfile: {
        adminPassword: 'string'
        adminUsername: 'string'
        computerNamePrefix: 'string'
        customData: 'string'
        linuxConfiguration: {
          disablePasswordAuthentication: bool
          patchSettings: {
            assessmentMode: 'string'
            patchMode: 'string'
          }
          provisionVMAgent: bool
          ssh: {
            publicKeys: [
              {
                keyData: 'string'
                path: 'string'
              }
            ]
          }
        }
        secrets: [
          {
            sourceVault: {
              id: 'string'
            }
            vaultCertificates: [
              {
                certificateStore: 'string'
                certificateUrl: 'string'
              }
            ]
          }
        ]
        windowsConfiguration: {
          additionalUnattendContent: [
            {
              componentName: 'Microsoft-Windows-Shell-Setup'
              content: 'string'
              passName: 'OobeSystem'
              settingName: 'string'
            }
          ]
          enableAutomaticUpdates: bool
          patchSettings: {
            assessmentMode: 'string'
            enableHotpatching: bool
            patchMode: 'string'
          }
          provisionVMAgent: bool
          timeZone: 'string'
          winRM: {
            listeners: [
              {
                certificateUrl: 'string'
                protocol: 'string'
              }
            ]
          }
        }
      }
      priority: 'string'
      scheduledEventsProfile: {
        terminateNotificationProfile: {
          enable: bool
          notBeforeTimeout: 'string'
        }
      }
      securityProfile: {
        encryptionAtHost: bool
        securityType: 'TrustedLaunch'
        uefiSettings: {
          secureBootEnabled: bool
          vTpmEnabled: bool
        }
      }
      storageProfile: {
        dataDisks: [
          {
            caching: 'string'
            createOption: 'string'
            diskIOPSReadWrite: int
            diskMBpsReadWrite: int
            diskSizeGB: int
            lun: int
            managedDisk: {
              diskEncryptionSet: {
                id: 'string'
              }
              storageAccountType: 'string'
            }
            name: 'string'
            writeAcceleratorEnabled: bool
          }
        ]
        imageReference: {
          id: 'string'
          offer: 'string'
          publisher: 'string'
          sharedGalleryImageId: 'string'
          sku: 'string'
          version: 'string'
        }
        osDisk: {
          caching: 'string'
          createOption: 'string'
          diffDiskSettings: {
            option: 'Local'
            placement: 'string'
          }
          diskSizeGB: int
          image: {
            uri: 'string'
          }
          managedDisk: {
            diskEncryptionSet: {
              id: 'string'
            }
            storageAccountType: 'string'
          }
          name: 'string'
          osType: 'string'
          vhdContainers: [
            'string'
          ]
          writeAcceleratorEnabled: bool
        }
      }
      userData: 'string'
    }
    zoneBalance: bool
  }
  zones: [
    'string' or int
  ]
}

Property values

virtualMachineScaleSets

Name	Description	Value
name	The resource name	string (required) Character limit: 1-15 (Windows) 1-64 (Linux) Valid characters: Can't use spaces, control characters, or these characters: ~ ! @ # $ % ^ & * ( ) = + _ [ ] { } \ | ; : . ' " , < > / ? Can't start with underscore. Can't end with period or hyphen.
location	Resource location	string (required)
tags	Resource tags	Dictionary of tag names and values. See Tags in templates
sku	The virtual machine scale set sku.	Sku
extendedLocation	The extended location of the Virtual Machine Scale Set.	ExtendedLocation
identity	The identity of the virtual machine scale set, if configured.	VirtualMachineScaleSetIdentity
plan	Specifies information about the marketplace image used to create the virtual machine. This element is only used for marketplace images. Before you can use a marketplace image from an API, you must enable the image for programmatic use. In the Azure portal, find the marketplace image that you want to use and then click Want to deploy programmatically, Get Started ->. Enter any required information and then click Save.	Plan
properties	Describes the properties of a Virtual Machine Scale Set.	VirtualMachineScaleSetProperties
zones	The virtual machine scale set zones. NOTE: Availability zones can only be set when you create the scale set	Array of availability zones as string or int.

ExtendedLocation

Name	Description	Value
name	The name of the extended location.	string
type	The type of the extended location.	'EdgeZone'

VirtualMachineScaleSetIdentity

Name	Description	Value
type	The type of identity used for the virtual machine scale set. The type 'SystemAssigned, UserAssigned' includes both an implicitly created identity and a set of user assigned identities. The type 'None' will remove any identities from the virtual machine scale set.	'None' 'SystemAssigned' 'SystemAssigned, UserAssigned' 'UserAssigned'
userAssignedIdentities	The list of user identities associated with the virtual machine scale set. The user identity dictionary key references will be ARM resource ids in the form: '/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.ManagedIdentity/userAssignedIdentities/{identityName}'.	VirtualMachineScaleSetIdentityUserAssignedIdentities

VirtualMachineScaleSetIdentityUserAssignedIdentities

Name	Description	Value
{customized property}		VirtualMachineScaleSetIdentityUserAssignedIdentities...

VirtualMachineScaleSetIdentityUserAssignedIdentities...

This object doesn't contain any properties to set during deployment. All properties are ReadOnly.

Plan

Name	Description	Value
name	The plan ID.	string
product	Specifies the product of the image from the marketplace. This is the same value as Offer under the imageReference element.	string
promotionCode	The promotion code.	string
publisher	The publisher ID.	string

VirtualMachineScaleSetProperties

Name	Description	Value
additionalCapabilities	Specifies additional capabilities enabled or disabled on the Virtual Machines in the Virtual Machine Scale Set. For instance: whether the Virtual Machines have the capability to support attaching managed data disks with UltraSSD_LRS storage account type.	AdditionalCapabilities
automaticRepairsPolicy	Policy for automatic repairs.	AutomaticRepairsPolicy
doNotRunExtensionsOnOverprovisionedVMs	When Overprovision is enabled, extensions are launched only on the requested number of VMs which are finally kept. This property will hence ensure that the extensions do not run on the extra overprovisioned VMs.	bool
hostGroup	Specifies information about the dedicated host group that the virtual machine scale set resides in. Minimum api-version: 2020-06-01.	SubResource
orchestrationMode	Specifies the orchestration mode for the virtual machine scale set.	'Flexible' 'Uniform'
overprovision	Specifies whether the Virtual Machine Scale Set should be overprovisioned.	bool
platformFaultDomainCount	Fault Domain count for each placement group.	int
proximityPlacementGroup	Specifies information about the proximity placement group that the virtual machine scale set should be assigned to. Minimum api-version: 2018-04-01.	SubResource
scaleInPolicy	Specifies the policies applied when scaling in Virtual Machines in the Virtual Machine Scale Set.	ScaleInPolicy
singlePlacementGroup	When true this limits the scale set to a single placement group, of max size 100 virtual machines. NOTE: If singlePlacementGroup is true, it may be modified to false. However, if singlePlacementGroup is false, it may not be modified to true.	bool
spotRestorePolicy	Specifies the Spot Restore properties for the virtual machine scale set.	SpotRestorePolicy
upgradePolicy	The upgrade policy.	UpgradePolicy
virtualMachineProfile	The virtual machine profile.	VirtualMachineScaleSetVMProfile
zoneBalance	Whether to force strictly even Virtual Machine distribution cross x-zones in case there is zone outage. zoneBalance property can only be set if the zones property of the scale set contains more than one zone. If there are no zones or only one zone specified, then zoneBalance property should not be set.	bool

AdditionalCapabilities

Name	Description	Value
hibernationEnabled	The flag that enables or disables hibernation capability on the VM.	bool
ultraSSDEnabled	The flag that enables or disables a capability to have one or more managed data disks with UltraSSD_LRS storage account type on the VM or VMSS. Managed disks with storage account type UltraSSD_LRS can be added to a virtual machine or virtual machine scale set only if this property is enabled.	bool

AutomaticRepairsPolicy

Name	Description	Value
enabled	Specifies whether automatic repairs should be enabled on the virtual machine scale set. The default value is false.	bool
gracePeriod	The amount of time for which automatic repairs are suspended due to a state change on VM. The grace time starts after the state change has completed. This helps avoid premature or accidental repairs. The time duration should be specified in ISO 8601 format. The minimum allowed grace period is 30 minutes (PT30M), which is also the default value. The maximum allowed grace period is 90 minutes (PT90M).	string

SubResource

Name	Description	Value
id	Resource Id	string

ScaleInPolicy

Name	Description	Value
forceDeletion	This property allows you to specify if virtual machines chosen for removal have to be force deleted when a virtual machine scale set is being scaled-in.(Feature in Preview)	bool
rules	The rules to be followed when scaling-in a virtual machine scale set. Possible values are: Default When a virtual machine scale set is scaled in, the scale set will first be balanced across zones if it is a zonal scale set. Then, it will be balanced across Fault Domains as far as possible. Within each Fault Domain, the virtual machines chosen for removal will be the newest ones that are not protected from scale-in. OldestVM When a virtual machine scale set is being scaled-in, the oldest virtual machines that are not protected from scale-in will be chosen for removal. For zonal virtual machine scale sets, the scale set will first be balanced across zones. Within each zone, the oldest virtual machines that are not protected will be chosen for removal. NewestVM When a virtual machine scale set is being scaled-in, the newest virtual machines that are not protected from scale-in will be chosen for removal. For zonal virtual machine scale sets, the scale set will first be balanced across zones. Within each zone, the newest virtual machines that are not protected will be chosen for removal.	String array containing any of: 'Default' 'NewestVM' 'OldestVM'

SpotRestorePolicy

Name	Description	Value
enabled	Enables the Spot-Try-Restore feature where evicted VMSS SPOT instances will be tried to be restored opportunistically based on capacity availability and pricing constraints	bool
restoreTimeout	Timeout value expressed as an ISO 8601 time duration after which the platform will not try to restore the VMSS SPOT instances	string

UpgradePolicy

Name	Description	Value
automaticOSUpgradePolicy	Configuration parameters used for performing automatic OS Upgrade.	AutomaticOSUpgradePolicy
mode	Specifies the mode of an upgrade to virtual machines in the scale set. Possible values are: Manual - You control the application of updates to virtual machines in the scale set. You do this by using the manualUpgrade action. Automatic - All virtual machines in the scale set are automatically updated at the same time.	'Automatic' 'Manual' 'Rolling'
rollingUpgradePolicy	The configuration parameters used while performing a rolling upgrade.	RollingUpgradePolicy

AutomaticOSUpgradePolicy

Name	Description	Value
disableAutomaticRollback	Whether OS image rollback feature should be disabled. Default value is false.	bool
enableAutomaticOSUpgrade	Indicates whether OS upgrades should automatically be applied to scale set instances in a rolling fashion when a newer version of the OS image becomes available. Default value is false. If this is set to true for Windows based scale sets, enableAutomaticUpdates is automatically set to false and cannot be set to true.	bool

RollingUpgradePolicy

Name	Description	Value
enableCrossZoneUpgrade	Allow VMSS to ignore AZ boundaries when constructing upgrade batches. Take into consideration the Update Domain and maxBatchInstancePercent to determine the batch size.	bool
maxBatchInstancePercent	The maximum percent of total virtual machine instances that will be upgraded simultaneously by the rolling upgrade in one batch. As this is a maximum, unhealthy instances in previous or future batches can cause the percentage of instances in a batch to decrease to ensure higher reliability. The default value for this parameter is 20%.	int Constraints: Min value = 5 Max value = 100
maxUnhealthyInstancePercent	The maximum percentage of the total virtual machine instances in the scale set that can be simultaneously unhealthy, either as a result of being upgraded, or by being found in an unhealthy state by the virtual machine health checks before the rolling upgrade aborts. This constraint will be checked prior to starting any batch. The default value for this parameter is 20%.	int Constraints: Min value = 5 Max value = 100
maxUnhealthyUpgradedInstancePercent	The maximum percentage of upgraded virtual machine instances that can be found to be in an unhealthy state. This check will happen after each batch is upgraded. If this percentage is ever exceeded, the rolling update aborts. The default value for this parameter is 20%.	int Constraints: Min value = 0 Max value = 100
pauseTimeBetweenBatches	The wait time between completing the update for all virtual machines in one batch and starting the next batch. The time duration should be specified in ISO 8601 format. The default value is 0 seconds (PT0S).	string
prioritizeUnhealthyInstances	Upgrade all unhealthy instances in a scale set before any healthy instances.	bool

VirtualMachineScaleSetVMProfile

Name	Description	Value
applicationProfile	Specifies the gallery applications that should be made available to the VM/VMSS	ApplicationProfile
billingProfile	Specifies the billing related details of a Azure Spot VMSS. Minimum api-version: 2019-03-01.	BillingProfile
capacityReservation	Specifies the capacity reservation related details of a scale set. Minimum api-version: 2021-04-01.	CapacityReservationProfile
diagnosticsProfile	Specifies the boot diagnostic settings state. Minimum api-version: 2015-06-15.	DiagnosticsProfile
evictionPolicy	Specifies the eviction policy for the Azure Spot virtual machine and Azure Spot scale set. For Azure Spot virtual machines, both 'Deallocate' and 'Delete' are supported and the minimum api-version is 2019-03-01. For Azure Spot scale sets, both 'Deallocate' and 'Delete' are supported and the minimum api-version is 2017-10-30-preview.	'Deallocate' 'Delete'
extensionProfile	Specifies a collection of settings for extensions installed on virtual machines in the scale set.	VirtualMachineScaleSetExtensionProfile
licenseType	Specifies that the image or disk that is being used was licensed on-premises. Possible values for Windows Server operating system are: Windows_Client Windows_Server Possible values for Linux Server operating system are: RHEL_BYOS (for RHEL) SLES_BYOS (for SUSE) For more information, see Azure Hybrid Use Benefit for Windows Server Azure Hybrid Use Benefit for Linux Server Minimum api-version: 2015-06-15	string
networkProfile	Specifies properties of the network interfaces of the virtual machines in the scale set.	VirtualMachineScaleSetNetworkProfile
osProfile	Specifies the operating system settings for the virtual machines in the scale set.	VirtualMachineScaleSetOSProfile
priority	Specifies the priority for the virtual machines in the scale set. Minimum api-version: 2017-10-30-preview	'Low' 'Regular' 'Spot'
scheduledEventsProfile	Specifies Scheduled Event related configurations.	ScheduledEventsProfile
securityProfile	Specifies the Security related profile settings for the virtual machines in the scale set.	SecurityProfile
storageProfile	Specifies the storage settings for the virtual machine disks.	VirtualMachineScaleSetStorageProfile
userData	UserData for the virtual machines in the scale set, which must be base-64 encoded. Customer should not pass any secrets in here. Minimum api-version: 2021-03-01	string

ApplicationProfile

Name	Description	Value
galleryApplications	Specifies the gallery applications that should be made available to the VM/VMSS	VMGalleryApplication[]

VMGalleryApplication

Name	Description	Value
configurationReference	Optional, Specifies the uri to an azure blob that will replace the default configuration for the package if provided	string
order	Optional, Specifies the order in which the packages have to be installed	int
packageReferenceId	Specifies the GalleryApplicationVersion resource id on the form of /subscriptions/{SubscriptionId}/resourceGroups/{ResourceGroupName}/providers/Microsoft.Compute/galleries/{galleryName}/applications/{application}/versions/{version}	string (required)
tags	Optional, Specifies a passthrough value for more generic context.	string

BillingProfile

Name	Description	Value
maxPrice	Specifies the maximum price you are willing to pay for a Azure Spot VM/VMSS. This price is in US Dollars. This price will be compared with the current Azure Spot price for the VM size. Also, the prices are compared at the time of create/update of Azure Spot VM/VMSS and the operation will only succeed if the maxPrice is greater than the current Azure Spot price. The maxPrice will also be used for evicting a Azure Spot VM/VMSS if the current Azure Spot price goes beyond the maxPrice after creation of VM/VMSS. Possible values are: - Any decimal value greater than zero. Example: 0.01538 -1 – indicates default price to be up-to on-demand. You can set the maxPrice to -1 to indicate that the Azure Spot VM/VMSS should not be evicted for price reasons. Also, the default max price is -1 if it is not provided by you. Minimum api-version: 2019-03-01. To specify a decimal value, use the json() function.	int or json decimal

CapacityReservationProfile

Name	Description	Value
capacityReservationGroup	Specifies the capacity reservation group resource id that should be used for allocating the virtual machine or scaleset vm instances provided enough capacity has been reserved. Please refer to https://aka.ms/CapacityReservation for more details.	SubResource

DiagnosticsProfile

Name	Description	Value
bootDiagnostics	Boot Diagnostics is a debugging feature which allows you to view Console Output and Screenshot to diagnose VM status. NOTE: If storageUri is being specified then ensure that the storage account is in the same region and subscription as the VM. You can easily view the output of your console log. Azure also enables you to see a screenshot of the VM from the hypervisor.	BootDiagnostics

BootDiagnostics

Name	Description	Value
enabled	Whether boot diagnostics should be enabled on the Virtual Machine.	bool
storageUri	Uri of the storage account to use for placing the console output and screenshot. If storageUri is not specified while enabling boot diagnostics, managed storage will be used.	string

VirtualMachineScaleSetExtensionProfile

Name	Description	Value
extensions	The virtual machine scale set child extension resources.	VirtualMachineScaleSetExtension[]
extensionsTimeBudget	Specifies the time alloted for all extensions to start. The time duration should be between 15 minutes and 120 minutes (inclusive) and should be specified in ISO 8601 format. The default value is 90 minutes (PT1H30M). Minimum api-version: 2020-06-01	string

VirtualMachineScaleSetExtension

Name	Description	Value
name	The name of the extension.	string
properties	Describes the properties of a Virtual Machine Scale Set Extension.	VirtualMachineScaleSetExtensionProperties

VirtualMachineScaleSetExtensionProperties

Name	Description	Value
autoUpgradeMinorVersion	Indicates whether the extension should use a newer minor version if one is available at deployment time. Once deployed, however, the extension will not upgrade minor versions unless redeployed, even with this property set to true.	bool
enableAutomaticUpgrade	Indicates whether the extension should be automatically upgraded by the platform if there is a newer version of the extension available.	bool
forceUpdateTag	If a value is provided and is different from the previous value, the extension handler will be forced to update even if the extension configuration has not changed.	string
protectedSettings	The extension can contain either protectedSettings or protectedSettingsFromKeyVault or no protected settings at all.	For Bicep, you can use the any() function.
provisionAfterExtensions	Collection of extension names after which this extension needs to be provisioned.	string[]
publisher	The name of the extension handler publisher.	string
settings	Json formatted public settings for the extension.	For Bicep, you can use the any() function.
suppressFailures	Indicates whether failures stemming from the extension will be suppressed (Operational failures such as not connecting to the VM will not be suppressed regardless of this value). The default is false.	bool
type	Specifies the type of the extension; an example is "CustomScriptExtension".	string
typeHandlerVersion	Specifies the version of the script handler.	string

VirtualMachineScaleSetNetworkProfile

Name	Description	Value
healthProbe	A reference to a load balancer probe used to determine the health of an instance in the virtual machine scale set. The reference will be in the form: '/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.Network/loadBalancers/{loadBalancerName}/probes/{probeName}'.	ApiEntityReference
networkApiVersion	specifies the Microsoft.Network API version used when creating networking resources in the Network Interface Configurations for Virtual Machine Scale Set with orchestration mode 'Flexible'	'2020-11-01'
networkInterfaceConfigurations	The list of network configurations.	VirtualMachineScaleSetNetworkConfiguration[]

ApiEntityReference

Name	Description	Value
id	The ARM resource id in the form of /subscriptions/{SubscriptionId}/resourceGroups/{ResourceGroupName}/...	string

VirtualMachineScaleSetNetworkConfiguration

Name	Description	Value
id	Resource Id	string
name	The network configuration name.	string (required)
properties	Describes a virtual machine scale set network profile's IP configuration.	VirtualMachineScaleSetNetworkConfigurationProperties

VirtualMachineScaleSetNetworkConfigurationProperties

Name	Description	Value
deleteOption	Specify what happens to the network interface when the VM is deleted	'Delete' 'Detach'
dnsSettings	The dns settings to be applied on the network interfaces.	VirtualMachineScaleSetNetworkConfigurationDnsSetting...
enableAcceleratedNetworking	Specifies whether the network interface is accelerated networking-enabled.	bool
enableFpga	Specifies whether the network interface is FPGA networking-enabled.	bool
enableIPForwarding	Whether IP forwarding enabled on this NIC.	bool
ipConfigurations	Specifies the IP configurations of the network interface.	VirtualMachineScaleSetIPConfiguration[] (required)
networkSecurityGroup	The network security group.	SubResource
primary	Specifies the primary network interface in case the virtual machine has more than 1 network interface.	bool

VirtualMachineScaleSetNetworkConfigurationDnsSetting...

Name	Description	Value
dnsServers	List of DNS servers IP addresses	string[]

VirtualMachineScaleSetIPConfiguration

Name	Description	Value
id	Resource Id	string
name	The IP configuration name.	string (required)
properties	Describes a virtual machine scale set network profile's IP configuration properties.	VirtualMachineScaleSetIPConfigurationProperties

VirtualMachineScaleSetIPConfigurationProperties

Name	Description	Value
applicationGatewayBackendAddressPools	Specifies an array of references to backend address pools of application gateways. A scale set can reference backend address pools of multiple application gateways. Multiple scale sets cannot use the same application gateway.	SubResource[]
applicationSecurityGroups	Specifies an array of references to application security group.	SubResource[]
loadBalancerBackendAddressPools	Specifies an array of references to backend address pools of load balancers. A scale set can reference backend address pools of one public and one internal load balancer. Multiple scale sets cannot use the same basic sku load balancer.	SubResource[]
loadBalancerInboundNatPools	Specifies an array of references to inbound Nat pools of the load balancers. A scale set can reference inbound nat pools of one public and one internal load balancer. Multiple scale sets cannot use the same basic sku load balancer.	SubResource[]
primary	Specifies the primary network interface in case the virtual machine has more than 1 network interface.	bool
privateIPAddressVersion	Available from Api-Version 2017-03-30 onwards, it represents whether the specific ipconfiguration is IPv4 or IPv6. Default is taken as IPv4. Possible values are: 'IPv4' and 'IPv6'.	'IPv4' 'IPv6'
publicIPAddressConfiguration	The publicIPAddressConfiguration.	VirtualMachineScaleSetPublicIPAddressConfiguration
subnet	Specifies the identifier of the subnet.	ApiEntityReference

VirtualMachineScaleSetPublicIPAddressConfiguration

Name	Description	Value
name	The publicIP address configuration name.	string (required)
properties	Describes a virtual machines scale set IP Configuration's PublicIPAddress configuration	VirtualMachineScaleSetPublicIPAddressConfigurationPr...
sku	Describes the public IP Sku	PublicIPAddressSku

VirtualMachineScaleSetPublicIPAddressConfigurationPr...

Name	Description	Value
deleteOption	Specify what happens to the public IP when the VM is deleted	'Delete' 'Detach'
dnsSettings	The dns settings to be applied on the publicIP addresses .	VirtualMachineScaleSetPublicIPAddressConfigurationDn...
idleTimeoutInMinutes	The idle timeout of the public IP address.	int
ipTags	The list of IP tags associated with the public IP address.	VirtualMachineScaleSetIpTag[]
publicIPAddressVersion	Available from Api-Version 2019-07-01 onwards, it represents whether the specific ipconfiguration is IPv4 or IPv6. Default is taken as IPv4. Possible values are: 'IPv4' and 'IPv6'.	'IPv4' 'IPv6'
publicIPPrefix	The PublicIPPrefix from which to allocate publicIP addresses.	SubResource

VirtualMachineScaleSetPublicIPAddressConfigurationDn...

Name	Description	Value
domainNameLabel	The Domain name label.The concatenation of the domain name label and vm index will be the domain name labels of the PublicIPAddress resources that will be created	string (required)

VirtualMachineScaleSetIpTag

Name	Description	Value
ipTagType	IP tag type. Example: FirstPartyUsage.	string
tag	IP tag associated with the public IP. Example: SQL, Storage etc.	string

PublicIPAddressSku

Name	Description	Value
name	Specify public IP sku name	'Basic' 'Standard'
tier	Specify public IP sku tier	'Global' 'Regional'

VirtualMachineScaleSetOSProfile

Name	Description	Value
adminPassword	Specifies the password of the administrator account. Minimum-length (Windows): 8 characters Minimum-length (Linux): 6 characters Max-length (Windows): 123 characters Max-length (Linux): 72 characters Complexity requirements: 3 out of 4 conditions below need to be fulfilled Has lower characters Has upper characters Has a digit Has a special character (Regex match [\W_]) Disallowed values: "abc@123", "P@$$w0rd", "P@ssw0rd", "P@ssword123", "Pa$$word", "pass@word1", "Password!", "Password1", "Password22", "iloveyou!" For resetting the password, see How to reset the Remote Desktop service or its login password in a Windows VM For resetting root password, see Manage users, SSH, and check or repair disks on Azure Linux VMs using the VMAccess Extension	string Constraints: Sensitive value. Pass in as a secure parameter.
adminUsername	Specifies the name of the administrator account. Windows-only restriction: Cannot end in "." Disallowed values: "administrator", "admin", "user", "user1", "test", "user2", "test1", "user3", "admin1", "1", "123", "a", "actuser", "adm", "admin2", "aspnet", "backup", "console", "david", "guest", "john", "owner", "root", "server", "sql", "support", "support_388945a0", "sys", "test2", "test3", "user4", "user5". Minimum-length (Linux): 1 character Max-length (Linux): 64 characters Max-length (Windows): 20 characters	string
computerNamePrefix	Specifies the computer name prefix for all of the virtual machines in the scale set. Computer name prefixes must be 1 to 15 characters long.	string
customData	Specifies a base-64 encoded string of custom data. The base-64 encoded string is decoded to a binary array that is saved as a file on the Virtual Machine. The maximum length of the binary array is 65535 bytes. For using cloud-init for your VM, see Using cloud-init to customize a Linux VM during creation	string
linuxConfiguration	Specifies the Linux operating system settings on the virtual machine. For a list of supported Linux distributions, see Linux on Azure-Endorsed Distributions.	LinuxConfiguration
secrets	Specifies set of certificates that should be installed onto the virtual machines in the scale set. To install certificates on a virtual machine it is recommended to use the Azure Key Vault virtual machine extension for Linux or the Azure Key Vault virtual machine extension for Windows.	VaultSecretGroup[]
windowsConfiguration	Specifies Windows operating system settings on the virtual machine.	WindowsConfiguration

LinuxConfiguration

Name	Description	Value
disablePasswordAuthentication	Specifies whether password authentication should be disabled.	bool
patchSettings	[Preview Feature] Specifies settings related to VM Guest Patching on Linux.	LinuxPatchSettings
provisionVMAgent	Indicates whether virtual machine agent should be provisioned on the virtual machine. When this property is not specified in the request body, default behavior is to set it to true. This will ensure that VM Agent is installed on the VM so that extensions can be added to the VM later.	bool
ssh	Specifies the ssh key configuration for a Linux OS.	SshConfiguration

LinuxPatchSettings

Name	Description	Value
assessmentMode	Specifies the mode of VM Guest Patch Assessment for the IaaS virtual machine. Possible values are: ImageDefault - You control the timing of patch assessments on a virtual machine. AutomaticByPlatform - The platform will trigger periodic patch assessments. The property provisionVMAgent must be true.	'AutomaticByPlatform' 'ImageDefault'
patchMode	Specifies the mode of VM Guest Patching to IaaS virtual machine or virtual machines associated to virtual machine scale set with OrchestrationMode as Flexible. Possible values are: ImageDefault - The virtual machine's default patching configuration is used. AutomaticByPlatform - The virtual machine will be automatically updated by the platform. The property provisionVMAgent must be true	'AutomaticByPlatform' 'ImageDefault'

SshConfiguration

Name	Description	Value
publicKeys	The list of SSH public keys used to authenticate with linux based VMs.	SshPublicKey[]

SshPublicKey

Name	Description	Value
keyData	SSH public key certificate used to authenticate with the VM through ssh. The key needs to be at least 2048-bit and in ssh-rsa format. For creating ssh keys, see [Create SSH keys on Linux and Mac for Linux VMs in Azure]/azure/virtual-machines/linux/create-ssh-keys-detailed).	string
path	Specifies the full path on the created VM where ssh public key is stored. If the file already exists, the specified key is appended to the file. Example: /home/user/.ssh/authorized_keys	string

VaultSecretGroup

Name	Description	Value
sourceVault	The relative URL of the Key Vault containing all of the certificates in VaultCertificates.	SubResource
vaultCertificates	The list of key vault references in SourceVault which contain certificates.	VaultCertificate[]

VaultCertificate

Name	Description	Value
certificateStore	For Windows VMs, specifies the certificate store on the Virtual Machine to which the certificate should be added. The specified certificate store is implicitly in the LocalMachine account. For Linux VMs, the certificate file is placed under the /var/lib/waagent directory, with the file name <UppercaseThumbprint>.crt for the X509 certificate file and <UppercaseThumbprint>.prv for private key. Both of these files are .pem formatted.	string
certificateUrl	This is the URL of a certificate that has been uploaded to Key Vault as a secret. For adding a secret to the Key Vault, see Add a key or secret to the key vault. In this case, your certificate needs to be It is the Base64 encoding of the following JSON Object which is encoded in UTF-8: { "data":"{Base64-encoded-certificate}", "dataType":"pfx", "password":"{pfx-file-password}" } To install certificates on a virtual machine it is recommended to use the Azure Key Vault virtual machine extension for Linux or the Azure Key Vault virtual machine extension for Windows.	string

WindowsConfiguration

Name	Description	Value
additionalUnattendContent	Specifies additional base-64 encoded XML formatted information that can be included in the Unattend.xml file, which is used by Windows Setup.	AdditionalUnattendContent[]
enableAutomaticUpdates	Indicates whether Automatic Updates is enabled for the Windows virtual machine. Default value is true. For virtual machine scale sets, this property can be updated and updates will take effect on OS reprovisioning.	bool
patchSettings	[Preview Feature] Specifies settings related to VM Guest Patching on Windows.	PatchSettings
provisionVMAgent	Indicates whether virtual machine agent should be provisioned on the virtual machine. When this property is not specified in the request body, default behavior is to set it to true. This will ensure that VM Agent is installed on the VM so that extensions can be added to the VM later.	bool
timeZone	Specifies the time zone of the virtual machine. e.g. "Pacific Standard Time". Possible values can be TimeZoneInfo.Id value from time zones returned by TimeZoneInfo.GetSystemTimeZones.	string
winRM	Specifies the Windows Remote Management listeners. This enables remote Windows PowerShell.	WinRMConfiguration

AdditionalUnattendContent

Name	Description	Value
componentName	The component name. Currently, the only allowable value is Microsoft-Windows-Shell-Setup.	'Microsoft-Windows-Shell-Setup'
content	Specifies the XML formatted content that is added to the unattend.xml file for the specified path and component. The XML must be less than 4KB and must include the root element for the setting or feature that is being inserted.	string
passName	The pass name. Currently, the only allowable value is OobeSystem.	'OobeSystem'
settingName	Specifies the name of the setting to which the content applies. Possible values are: FirstLogonCommands and AutoLogon.	'AutoLogon' 'FirstLogonCommands'

PatchSettings

Name	Description	Value
assessmentMode	Specifies the mode of VM Guest patch assessment for the IaaS virtual machine. Possible values are: ImageDefault - You control the timing of patch assessments on a virtual machine. AutomaticByPlatform - The platform will trigger periodic patch assessments. The property provisionVMAgent must be true.	'AutomaticByPlatform' 'ImageDefault'
enableHotpatching	Enables customers to patch their Azure VMs without requiring a reboot. For enableHotpatching, the 'provisionVMAgent' must be set to true and 'patchMode' must be set to 'AutomaticByPlatform'.	bool
patchMode	Specifies the mode of VM Guest Patching to IaaS virtual machine or virtual machines associated to virtual machine scale set with OrchestrationMode as Flexible. Possible values are: Manual - You control the application of patches to a virtual machine. You do this by applying patches manually inside the VM. In this mode, automatic updates are disabled; the property WindowsConfiguration.enableAutomaticUpdates must be false AutomaticByOS - The virtual machine will automatically be updated by the OS. The property WindowsConfiguration.enableAutomaticUpdates must be true. AutomaticByPlatform - the virtual machine will automatically updated by the platform. The properties provisionVMAgent and WindowsConfiguration.enableAutomaticUpdates must be true	'AutomaticByOS' 'AutomaticByPlatform' 'Manual'

WinRMConfiguration

Name	Description	Value
listeners	The list of Windows Remote Management listeners	WinRMListener[]

WinRMListener

Name	Description	Value
certificateUrl	This is the URL of a certificate that has been uploaded to Key Vault as a secret. For adding a secret to the Key Vault, see Add a key or secret to the key vault. In this case, your certificate needs to be It is the Base64 encoding of the following JSON Object which is encoded in UTF-8: { "data":"{Base64-encoded-certificate}", "dataType":"pfx", "password":"{pfx-file-password}" } To install certificates on a virtual machine it is recommended to use the Azure Key Vault virtual machine extension for Linux or the Azure Key Vault virtual machine extension for Windows.	string
protocol	Specifies the protocol of WinRM listener. Possible values are: http https	'Http' 'Https'

ScheduledEventsProfile

Name	Description	Value
terminateNotificationProfile	Specifies Terminate Scheduled Event related configurations.	TerminateNotificationProfile

TerminateNotificationProfile

Name	Description	Value
enable	Specifies whether the Terminate Scheduled event is enabled or disabled.	bool
notBeforeTimeout	Configurable length of time a Virtual Machine being deleted will have to potentially approve the Terminate Scheduled Event before the event is auto approved (timed out). The configuration must be specified in ISO 8601 format, the default value is 5 minutes (PT5M)	string

SecurityProfile

Name	Description	Value
encryptionAtHost	This property can be used by user in the request to enable or disable the Host Encryption for the virtual machine or virtual machine scale set. This will enable the encryption for all the disks including Resource/Temp disk at host itself. Default: The Encryption at host will be disabled unless this property is set to true for the resource.	bool
securityType	Specifies the SecurityType of the virtual machine. It is set as TrustedLaunch to enable UefiSettings. Default: UefiSettings will not be enabled unless this property is set as TrustedLaunch.	'TrustedLaunch'
uefiSettings	Specifies the security settings like secure boot and vTPM used while creating the virtual machine. Minimum api-version: 2020-12-01	UefiSettings

UefiSettings

Name	Description	Value
secureBootEnabled	Specifies whether secure boot should be enabled on the virtual machine. Minimum api-version: 2020-12-01	bool
vTpmEnabled	Specifies whether vTPM should be enabled on the virtual machine. Minimum api-version: 2020-12-01	bool

VirtualMachineScaleSetStorageProfile

Name	Description	Value
dataDisks	Specifies the parameters that are used to add data disks to the virtual machines in the scale set. For more information about disks, see About disks and VHDs for Azure virtual machines.	VirtualMachineScaleSetDataDisk[]
imageReference	Specifies information about the image to use. You can specify information about platform images, marketplace images, or virtual machine images. This element is required when you want to use a platform image, marketplace image, or virtual machine image, but is not used in other creation operations.	ImageReference
osDisk	Specifies information about the operating system disk used by the virtual machines in the scale set. For more information about disks, see About disks and VHDs for Azure virtual machines.	VirtualMachineScaleSetOSDisk

VirtualMachineScaleSetDataDisk

Name	Description	Value
caching	Specifies the caching requirements. Possible values are: None ReadOnly ReadWrite Default: None for Standard storage. ReadOnly for Premium storage	'None' 'ReadOnly' 'ReadWrite'
createOption	The create option.	'Attach' 'Empty' 'FromImage' (required)
diskIOPSReadWrite	Specifies the Read-Write IOPS for the managed disk. Should be used only when StorageAccountType is UltraSSD_LRS. If not specified, a default value would be assigned based on diskSizeGB.	int
diskMBpsReadWrite	Specifies the bandwidth in MB per second for the managed disk. Should be used only when StorageAccountType is UltraSSD_LRS. If not specified, a default value would be assigned based on diskSizeGB.	int
diskSizeGB	Specifies the size of an empty data disk in gigabytes. This element can be used to overwrite the size of the disk in a virtual machine image. This value cannot be larger than 1023 GB	int
lun	Specifies the logical unit number of the data disk. This value is used to identify data disks within the VM and therefore must be unique for each data disk attached to a VM.	int (required)
managedDisk	The managed disk parameters.	VirtualMachineScaleSetManagedDiskParameters
name	The disk name.	string
writeAcceleratorEnabled	Specifies whether writeAccelerator should be enabled or disabled on the disk.	bool

VirtualMachineScaleSetManagedDiskParameters

Name	Description	Value
diskEncryptionSet	Specifies the customer managed disk encryption set resource id for the managed disk.	DiskEncryptionSetParameters
storageAccountType	Specifies the storage account type for the managed disk. NOTE: UltraSSD_LRS can only be used with data disks, it cannot be used with OS Disk.	'Premium_LRS' 'Premium_ZRS' 'StandardSSD_LRS' 'StandardSSD_ZRS' 'Standard_LRS' 'UltraSSD_LRS'

DiskEncryptionSetParameters

Name	Description	Value
id	Resource Id	string

ImageReference

Name	Description	Value
id	Resource Id	string
offer	Specifies the offer of the platform image or marketplace image used to create the virtual machine.	string
publisher	The image publisher.	string
sharedGalleryImageId	Specified the shared gallery image unique id for vm deployment. This can be fetched from shared gallery image GET call.	string
sku	The image SKU.	string
version	Specifies the version of the platform image or marketplace image used to create the virtual machine. The allowed formats are Major.Minor.Build or 'latest'. Major, Minor, and Build are decimal numbers. Specify 'latest' to use the latest version of an image available at deploy time. Even if you use 'latest', the VM image will not automatically update after deploy time even if a new version becomes available.	string

VirtualMachineScaleSetOSDisk

Name	Description	Value
caching	Specifies the caching requirements. Possible values are: None ReadOnly ReadWrite Default: None for Standard storage. ReadOnly for Premium storage	'None' 'ReadOnly' 'ReadWrite'
createOption	Specifies how the virtual machines in the scale set should be created. The only allowed value is: FromImage \u2013 This value is used when you are using an image to create the virtual machine. If you are using a platform image, you also use the imageReference element described above. If you are using a marketplace image, you also use the plan element previously described.	'Attach' 'Empty' 'FromImage' (required)
diffDiskSettings	Specifies the ephemeral disk Settings for the operating system disk used by the virtual machine scale set.	DiffDiskSettings
diskSizeGB	Specifies the size of the operating system disk in gigabytes. This element can be used to overwrite the size of the disk in a virtual machine image. This value cannot be larger than 1023 GB	int
image	Specifies information about the unmanaged user image to base the scale set on.	VirtualHardDisk
managedDisk	The managed disk parameters.	VirtualMachineScaleSetManagedDiskParameters
name	The disk name.	string
osType	This property allows you to specify the type of the OS that is included in the disk if creating a VM from user-image or a specialized VHD. Possible values are: Windows Linux	'Linux' 'Windows'
vhdContainers	Specifies the container urls that are used to store operating system disks for the scale set.	string[]
writeAcceleratorEnabled	Specifies whether writeAccelerator should be enabled or disabled on the disk.	bool

DiffDiskSettings

Name	Description	Value
option	Specifies the ephemeral disk settings for operating system disk.	'Local'
placement	Specifies the ephemeral disk placement for operating system disk. Possible values are: CacheDisk ResourceDisk Default: CacheDisk if one is configured for the VM size otherwise ResourceDisk is used. Refer to VM size documentation for Windows VM at /azure/virtual-machines/windows/sizes and Linux VM at /azure/virtual-machines/linux/sizes to check which VM sizes exposes a cache disk.	'CacheDisk' 'ResourceDisk'

VirtualHardDisk

Name	Description	Value
uri	Specifies the virtual hard disk's uri.	string

Sku

Name	Description	Value
capacity	Specifies the number of virtual machines in the scale set.	int
name	The sku name.	string
tier	Specifies the tier of virtual machines in a scale set. Possible Values: Standard Basic	string

Quickstart templates

The following quickstart templates deploy this resource type.

Template	Description
Deploy VM Scale Set with LB probe and automatic repairs	This template allows you to deploy a VM scale set of Linux VMs behind a load balancer with health probe configured. The scale set also has automatic instance repairs policy enabled with a grace period of 30 minutes.
Deploy a VMSS that connects each VM to an Azure Files share	This template deploys an Ubuntu Virtual Machine Scale Set and uses a custom script extension to connect each VM to an Azure Files share
Deploy a Windows VM Scale Set with a Custom Script Extension	This template allows you to deploy a VM Scale Set of Windows VMs using the lastest patched version of various Windows Versions. These VMs have a custom script extension for customization and are behind a load balancer with NAT rules for rdp connections.
Deploy a Scale Set into an existing vnet	This template deploys a VM Scale Set into an exsisting vnet.
Add multiple VMs into a Virtual Machine Scale Set	This template will create N number of VM's with managed disks, public IPs and network interfaces. It will create the VMs in a Virtual Machine Scale Set in Flexible Orchestration mode. They will be provisioned in a Virtual Network which will also be created as part of the deployment
VMSS Flexible Orchestration Mode Quickstart Linux	This template deploys a simple VM Scale Set with instances behind an Azure Load Balancer. The VM Scale set is in Flexible Orchestration Mode. Use the os parameter to choose Linux (Ubuntu) or Windows (Windows Server Datacenter 2019) deployment. NOTE: This quickstart template enables network access to VM management ports (SSH, RDP) from any internet address, and should not be used for production deployments.
Deploy a VM Scale Set with Linux VMs behind ILB	This template allows you to deploy a VM Scale Set of Linux VMs using the latest patched version of Ubuntu Linux 15.10 or 14.04.4-LTS. These VMs are behind an internal load balancer with NAT rules for ssh connections.
Deploy a VM Scale Set with a Linux custom image	This template allows you to deploy a custom VM Linux image inside an Scale Set. These VMs are behind a load balancer with HTTP load balancing (by default on port 80). The example uses a custom script to do the application deployment and update, you may have to provide your custom script for your own update procedure. You will have to provide a generalized image of your VM in the same subscription and region where you create the VMSS.
Deploy a simple VM Scale Set with Linux VMs	This template allows you to deploy a simple VM Scale Set of Linux VMs using the latest patched version of Ubuntu Linux 14.04.4-LTS or 16.04-LTS. These VMs are behind a load balancer with NAT rules for ssh connections.
Deploy a VM Scale Set with Linux VMs in Availabilty Zones	This template allows you to deploy a simple VM Scale Set of Linux VMs using the latest patched version of Ubuntu Linux 14.04.4-LTS or 16.04-LTS. These VMs are behind a load balancer with NAT rules for ssh connections.
Deploy a Linux VMSS wth primary/secondary architecture	This template allows you to deploy a Linux VMSS with a Custom Script Extension in primary secondary architecture
Simple VM Scale Set with Linux VMs and public IPv4 per VM	This template demonstrates deploying a simple scale set with load balancer, inbound NAT rules, and public IP per VM.
Deploy a trusted launch capable Windows VM Scale Set	This template allows you to deploy a trusted launch capable VM Scale Set of Windows VMs using the latest patched version of Windows Server 2016, Windows Server 2019 or Windows Server 2022 Azure Edition. These VMs are behind a load balancer with NAT rules for RDP connections. If you enable Secureboot and vTPM, the Guest Attestation extension will be installed on your VMSS. This extension will perform remote attestation by the cloud.
Deploy an Ubuntu VM scale set with Azure Application Gateway	This template allows you to deploy a simple Ubuntu VM Scale Set integrated with Azure Application Gateway, and supports up to 1000 VMs
Deploy a VM Scale Set with Linux VMs and Auto Scale	This template allows you to deploy a simple VM Scale Set of Linux VMs using the latest patched version of Ubuntu Linux 15.04 or 14.04.4-LTS. These VMs are behind a load balancer with NAT rules for ssh connections.They also have Auto Scale integrated
SSL enabled VM Scale Set	Deploys web servers configures with SSL certificates deployed securely form Azure Key Vault
Deploy a Scale Set into an existing vnet on Windows	This template deploys a Windows 2016 Datacenter VM Scale Set into an exsisting resource group, vnet and subnet.
Deploy a Windows VM scale set with Azure Application Gateway	This template allows you to deploy a simple Windows VM Scale Set integrated with Azure Application Gateway, and supports up to 1000 VMs
Deploy a VM Scale Set with Windows VMs and Auto Scale	This template allows you to deploy a simple VM Scale Set of Windows VMs using the latest patched version of Windows 2008-R2-SP1, 2012-Datacenter, or 2012-R2-Datacenter. These VMs are behind a load balancer with NAT rules for RDP connections. They also have Auto Scale integrated
Deploy a VM Scale Set with a Windows custom image	This template allows you to deploy a simple VM Scale Set usng a custom Windows image. These VMs are behind a load balancer with HTTP load balancing (by default on port 80)
Deploy a simple VM Scale Set with Windows VMs	This template allows you to deploy a simple VM Scale Set of Windows VMs using the lastest patched version of various Windows Versions. These VMs are behind a load balancer with NAT rules for rdp connections.
Deploy a VM Scale Set with Windows VMs in Availability Zones	This template allows you to deploy a VM Scale Set of Windows VMs using the lastest patched version of various Windows Versions. These VMs are behind a load balancer with NAT rules for rdp connections.
VMSS with Public IP Prefix	Template for deploying VMSS with Public IP Prefix

ARM template resource definition

The virtualMachineScaleSets resource type can be deployed with operations that target:

• Resource groups - See resource group deployment commands

For a list of changed properties in each API version, see change log.

Resource format

To create a Microsoft.Compute/virtualMachineScaleSets resource, add the following JSON to your template.

{
  "type": "Microsoft.Compute/virtualMachineScaleSets",
  "apiVersion": "2021-07-01",
  "name": "string",
  "location": "string",
  "tags": {
    "tagName1": "tagValue1",
    "tagName2": "tagValue2"
  },
  "sku": {
    "capacity": "int",
    "name": "string",
    "tier": "string"
  },
  "extendedLocation": {
    "name": "string",
    "type": "EdgeZone"
  },
  "identity": {
    "type": "string",
    "userAssignedIdentities": {
      "{customized property}": {}
    }
  },
  "plan": {
    "name": "string",
    "product": "string",
    "promotionCode": "string",
    "publisher": "string"
  },
  "properties": {
    "additionalCapabilities": {
      "hibernationEnabled": "bool",
      "ultraSSDEnabled": "bool"
    },
    "automaticRepairsPolicy": {
      "enabled": "bool",
      "gracePeriod": "string"
    },
    "doNotRunExtensionsOnOverprovisionedVMs": "bool",
    "hostGroup": {
      "id": "string"
    },
    "orchestrationMode": "string",
    "overprovision": "bool",
    "platformFaultDomainCount": "int",
    "proximityPlacementGroup": {
      "id": "string"
    },
    "scaleInPolicy": {
      "forceDeletion": "bool",
      "rules": [ "string" ]
    },
    "singlePlacementGroup": "bool",
    "spotRestorePolicy": {
      "enabled": "bool",
      "restoreTimeout": "string"
    },
    "upgradePolicy": {
      "automaticOSUpgradePolicy": {
        "disableAutomaticRollback": "bool",
        "enableAutomaticOSUpgrade": "bool"
      },
      "mode": "string",
      "rollingUpgradePolicy": {
        "enableCrossZoneUpgrade": "bool",
        "maxBatchInstancePercent": "int",
        "maxUnhealthyInstancePercent": "int",
        "maxUnhealthyUpgradedInstancePercent": "int",
        "pauseTimeBetweenBatches": "string",
        "prioritizeUnhealthyInstances": "bool"
      }
    },
    "virtualMachineProfile": {
      "applicationProfile": {
        "galleryApplications": [
          {
            "configurationReference": "string",
            "order": "int",
            "packageReferenceId": "string",
            "tags": "string"
          }
        ]
      },
      "billingProfile": {
        "maxPrice": "[json('decimal-as-string')]"
      },
      "capacityReservation": {
        "capacityReservationGroup": {
          "id": "string"
        }
      },
      "diagnosticsProfile": {
        "bootDiagnostics": {
          "enabled": "bool",
          "storageUri": "string"
        }
      },
      "evictionPolicy": "string",
      "extensionProfile": {
        "extensions": [
          {
            "name": "string",
            "properties": {
              "autoUpgradeMinorVersion": "bool",
              "enableAutomaticUpgrade": "bool",
              "forceUpdateTag": "string",
              "protectedSettings": {},
              "provisionAfterExtensions": [ "string" ],
              "publisher": "string",
              "settings": {},
              "suppressFailures": "bool",
              "type": "string",
              "typeHandlerVersion": "string"
            }
          }
        ],
        "extensionsTimeBudget": "string"
      },
      "licenseType": "string",
      "networkProfile": {
        "healthProbe": {
          "id": "string"
        },
        "networkApiVersion": "2020-11-01",
        "networkInterfaceConfigurations": [
          {
            "id": "string",
            "name": "string",
            "properties": {
              "deleteOption": "string",
              "dnsSettings": {
                "dnsServers": [ "string" ]
              },
              "enableAcceleratedNetworking": "bool",
              "enableFpga": "bool",
              "enableIPForwarding": "bool",
              "ipConfigurations": [
                {
                  "id": "string",
                  "name": "string",
                  "properties": {
                    "applicationGatewayBackendAddressPools": [
                      {
                        "id": "string"
                      }
                    ],
                    "applicationSecurityGroups": [
                      {
                        "id": "string"
                      }
                    ],
                    "loadBalancerBackendAddressPools": [
                      {
                        "id": "string"
                      }
                    ],
                    "loadBalancerInboundNatPools": [
                      {
                        "id": "string"
                      }
                    ],
                    "primary": "bool",
                    "privateIPAddressVersion": "string",
                    "publicIPAddressConfiguration": {
                      "name": "string",
                      "properties": {
                        "deleteOption": "string",
                        "dnsSettings": {
                          "domainNameLabel": "string"
                        },
                        "idleTimeoutInMinutes": "int",
                        "ipTags": [
                          {
                            "ipTagType": "string",
                            "tag": "string"
                          }
                        ],
                        "publicIPAddressVersion": "string",
                        "publicIPPrefix": {
                          "id": "string"
                        }
                      },
                      "sku": {
                        "name": "string",
                        "tier": "string"
                      }
                    },
                    "subnet": {
                      "id": "string"
                    }
                  }
                }
              ],
              "networkSecurityGroup": {
                "id": "string"
              },
              "primary": "bool"
            }
          }
        ]
      },
      "osProfile": {
        "adminPassword": "string",
        "adminUsername": "string",
        "computerNamePrefix": "string",
        "customData": "string",
        "linuxConfiguration": {
          "disablePasswordAuthentication": "bool",
          "patchSettings": {
            "assessmentMode": "string",
            "patchMode": "string"
          },
          "provisionVMAgent": "bool",
          "ssh": {
            "publicKeys": [
              {
                "keyData": "string",
                "path": "string"
              }
            ]
          }
        },
        "secrets": [
          {
            "sourceVault": {
              "id": "string"
            },
            "vaultCertificates": [
              {
                "certificateStore": "string",
                "certificateUrl": "string"
              }
            ]
          }
        ],
        "windowsConfiguration": {
          "additionalUnattendContent": [
            {
              "componentName": "Microsoft-Windows-Shell-Setup",
              "content": "string",
              "passName": "OobeSystem",
              "settingName": "string"
            }
          ],
          "enableAutomaticUpdates": "bool",
          "patchSettings": {
            "assessmentMode": "string",
            "enableHotpatching": "bool",
            "patchMode": "string"
          },
          "provisionVMAgent": "bool",
          "timeZone": "string",
          "winRM": {
            "listeners": [
              {
                "certificateUrl": "string",
                "protocol": "string"
              }
            ]
          }
        }
      },
      "priority": "string",
      "scheduledEventsProfile": {
        "terminateNotificationProfile": {
          "enable": "bool",
          "notBeforeTimeout": "string"
        }
      },
      "securityProfile": {
        "encryptionAtHost": "bool",
        "securityType": "TrustedLaunch",
        "uefiSettings": {
          "secureBootEnabled": "bool",
          "vTpmEnabled": "bool"
        }
      },
      "storageProfile": {
        "dataDisks": [
          {
            "caching": "string",
            "createOption": "string",
            "diskIOPSReadWrite": "int",
            "diskMBpsReadWrite": "int",
            "diskSizeGB": "int",
            "lun": "int",
            "managedDisk": {
              "diskEncryptionSet": {
                "id": "string"
              },
              "storageAccountType": "string"
            },
            "name": "string",
            "writeAcceleratorEnabled": "bool"
          }
        ],
        "imageReference": {
          "id": "string",
          "offer": "string",
          "publisher": "string",
          "sharedGalleryImageId": "string",
          "sku": "string",
          "version": "string"
        },
        "osDisk": {
          "caching": "string",
          "createOption": "string",
          "diffDiskSettings": {
            "option": "Local",
            "placement": "string"
          },
          "diskSizeGB": "int",
          "image": {
            "uri": "string"
          },
          "managedDisk": {
            "diskEncryptionSet": {
              "id": "string"
            },
            "storageAccountType": "string"
          },
          "name": "string",
          "osType": "string",
          "vhdContainers": [ "string" ],
          "writeAcceleratorEnabled": "bool"
        }
      },
      "userData": "string"
    },
    "zoneBalance": "bool"
  },
  "zones": [ "string" or int ]
}

Property values

virtualMachineScaleSets

Name	Description	Value
type	The resource type	'Microsoft.Compute/virtualMachineScaleSets'
apiVersion	The resource api version	'2021-07-01'
name	The resource name	string (required) Character limit: 1-15 (Windows) 1-64 (Linux) Valid characters: Can't use spaces, control characters, or these characters: ~ ! @ # $ % ^ & * ( ) = + _ [ ] { } \ | ; : . ' " , < > / ? Can't start with underscore. Can't end with period or hyphen.
location	Resource location	string (required)
tags	Resource tags	Dictionary of tag names and values. See Tags in templates
sku	The virtual machine scale set sku.	Sku
extendedLocation	The extended location of the Virtual Machine Scale Set.	ExtendedLocation
identity	The identity of the virtual machine scale set, if configured.	VirtualMachineScaleSetIdentity
plan	Specifies information about the marketplace image used to create the virtual machine. This element is only used for marketplace images. Before you can use a marketplace image from an API, you must enable the image for programmatic use. In the Azure portal, find the marketplace image that you want to use and then click Want to deploy programmatically, Get Started ->. Enter any required information and then click Save.	Plan
properties	Describes the properties of a Virtual Machine Scale Set.	VirtualMachineScaleSetProperties
zones	The virtual machine scale set zones. NOTE: Availability zones can only be set when you create the scale set	Array of availability zones as string or int.

ExtendedLocation

Name	Description	Value
name	The name of the extended location.	string
type	The type of the extended location.	'EdgeZone'

VirtualMachineScaleSetIdentity

Name	Description	Value
type	The type of identity used for the virtual machine scale set. The type 'SystemAssigned, UserAssigned' includes both an implicitly created identity and a set of user assigned identities. The type 'None' will remove any identities from the virtual machine scale set.	'None' 'SystemAssigned' 'SystemAssigned, UserAssigned' 'UserAssigned'
userAssignedIdentities	The list of user identities associated with the virtual machine scale set. The user identity dictionary key references will be ARM resource ids in the form: '/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.ManagedIdentity/userAssignedIdentities/{identityName}'.	VirtualMachineScaleSetIdentityUserAssignedIdentities

VirtualMachineScaleSetIdentityUserAssignedIdentities

Name	Description	Value
{customized property}		VirtualMachineScaleSetIdentityUserAssignedIdentities...

VirtualMachineScaleSetIdentityUserAssignedIdentities...

This object doesn't contain any properties to set during deployment. All properties are ReadOnly.

Plan

Name	Description	Value
name	The plan ID.	string
product	Specifies the product of the image from the marketplace. This is the same value as Offer under the imageReference element.	string
promotionCode	The promotion code.	string
publisher	The publisher ID.	string

VirtualMachineScaleSetProperties

Name	Description	Value
additionalCapabilities	Specifies additional capabilities enabled or disabled on the Virtual Machines in the Virtual Machine Scale Set. For instance: whether the Virtual Machines have the capability to support attaching managed data disks with UltraSSD_LRS storage account type.	AdditionalCapabilities
automaticRepairsPolicy	Policy for automatic repairs.	AutomaticRepairsPolicy
doNotRunExtensionsOnOverprovisionedVMs	When Overprovision is enabled, extensions are launched only on the requested number of VMs which are finally kept. This property will hence ensure that the extensions do not run on the extra overprovisioned VMs.	bool
hostGroup	Specifies information about the dedicated host group that the virtual machine scale set resides in. Minimum api-version: 2020-06-01.	SubResource
orchestrationMode	Specifies the orchestration mode for the virtual machine scale set.	'Flexible' 'Uniform'
overprovision	Specifies whether the Virtual Machine Scale Set should be overprovisioned.	bool
platformFaultDomainCount	Fault Domain count for each placement group.	int
proximityPlacementGroup	Specifies information about the proximity placement group that the virtual machine scale set should be assigned to. Minimum api-version: 2018-04-01.	SubResource
scaleInPolicy	Specifies the policies applied when scaling in Virtual Machines in the Virtual Machine Scale Set.	ScaleInPolicy
singlePlacementGroup	When true this limits the scale set to a single placement group, of max size 100 virtual machines. NOTE: If singlePlacementGroup is true, it may be modified to false. However, if singlePlacementGroup is false, it may not be modified to true.	bool
spotRestorePolicy	Specifies the Spot Restore properties for the virtual machine scale set.	SpotRestorePolicy
upgradePolicy	The upgrade policy.	UpgradePolicy
virtualMachineProfile	The virtual machine profile.	VirtualMachineScaleSetVMProfile
zoneBalance	Whether to force strictly even Virtual Machine distribution cross x-zones in case there is zone outage. zoneBalance property can only be set if the zones property of the scale set contains more than one zone. If there are no zones or only one zone specified, then zoneBalance property should not be set.	bool

AdditionalCapabilities

Name	Description	Value
hibernationEnabled	The flag that enables or disables hibernation capability on the VM.	bool
ultraSSDEnabled	The flag that enables or disables a capability to have one or more managed data disks with UltraSSD_LRS storage account type on the VM or VMSS. Managed disks with storage account type UltraSSD_LRS can be added to a virtual machine or virtual machine scale set only if this property is enabled.	bool

AutomaticRepairsPolicy

Name	Description	Value
enabled	Specifies whether automatic repairs should be enabled on the virtual machine scale set. The default value is false.	bool
gracePeriod	The amount of time for which automatic repairs are suspended due to a state change on VM. The grace time starts after the state change has completed. This helps avoid premature or accidental repairs. The time duration should be specified in ISO 8601 format. The minimum allowed grace period is 30 minutes (PT30M), which is also the default value. The maximum allowed grace period is 90 minutes (PT90M).	string

SubResource

Name	Description	Value
id	Resource Id	string

ScaleInPolicy

Name	Description	Value
forceDeletion	This property allows you to specify if virtual machines chosen for removal have to be force deleted when a virtual machine scale set is being scaled-in.(Feature in Preview)	bool
rules	The rules to be followed when scaling-in a virtual machine scale set. Possible values are: Default When a virtual machine scale set is scaled in, the scale set will first be balanced across zones if it is a zonal scale set. Then, it will be balanced across Fault Domains as far as possible. Within each Fault Domain, the virtual machines chosen for removal will be the newest ones that are not protected from scale-in. OldestVM When a virtual machine scale set is being scaled-in, the oldest virtual machines that are not protected from scale-in will be chosen for removal. For zonal virtual machine scale sets, the scale set will first be balanced across zones. Within each zone, the oldest virtual machines that are not protected will be chosen for removal. NewestVM When a virtual machine scale set is being scaled-in, the newest virtual machines that are not protected from scale-in will be chosen for removal. For zonal virtual machine scale sets, the scale set will first be balanced across zones. Within each zone, the newest virtual machines that are not protected will be chosen for removal.	String array containing any of: 'Default' 'NewestVM' 'OldestVM'

SpotRestorePolicy

Name	Description	Value
enabled	Enables the Spot-Try-Restore feature where evicted VMSS SPOT instances will be tried to be restored opportunistically based on capacity availability and pricing constraints	bool
restoreTimeout	Timeout value expressed as an ISO 8601 time duration after which the platform will not try to restore the VMSS SPOT instances	string

UpgradePolicy

Name	Description	Value
automaticOSUpgradePolicy	Configuration parameters used for performing automatic OS Upgrade.	AutomaticOSUpgradePolicy
mode	Specifies the mode of an upgrade to virtual machines in the scale set. Possible values are: Manual - You control the application of updates to virtual machines in the scale set. You do this by using the manualUpgrade action. Automatic - All virtual machines in the scale set are automatically updated at the same time.	'Automatic' 'Manual' 'Rolling'
rollingUpgradePolicy	The configuration parameters used while performing a rolling upgrade.	RollingUpgradePolicy

AutomaticOSUpgradePolicy

Name	Description	Value
disableAutomaticRollback	Whether OS image rollback feature should be disabled. Default value is false.	bool
enableAutomaticOSUpgrade	Indicates whether OS upgrades should automatically be applied to scale set instances in a rolling fashion when a newer version of the OS image becomes available. Default value is false. If this is set to true for Windows based scale sets, enableAutomaticUpdates is automatically set to false and cannot be set to true.	bool

RollingUpgradePolicy

Name	Description	Value
enableCrossZoneUpgrade	Allow VMSS to ignore AZ boundaries when constructing upgrade batches. Take into consideration the Update Domain and maxBatchInstancePercent to determine the batch size.	bool
maxBatchInstancePercent	The maximum percent of total virtual machine instances that will be upgraded simultaneously by the rolling upgrade in one batch. As this is a maximum, unhealthy instances in previous or future batches can cause the percentage of instances in a batch to decrease to ensure higher reliability. The default value for this parameter is 20%.	int Constraints: Min value = 5 Max value = 100
maxUnhealthyInstancePercent	The maximum percentage of the total virtual machine instances in the scale set that can be simultaneously unhealthy, either as a result of being upgraded, or by being found in an unhealthy state by the virtual machine health checks before the rolling upgrade aborts. This constraint will be checked prior to starting any batch. The default value for this parameter is 20%.	int Constraints: Min value = 5 Max value = 100
maxUnhealthyUpgradedInstancePercent	The maximum percentage of upgraded virtual machine instances that can be found to be in an unhealthy state. This check will happen after each batch is upgraded. If this percentage is ever exceeded, the rolling update aborts. The default value for this parameter is 20%.	int Constraints: Min value = 0 Max value = 100
pauseTimeBetweenBatches	The wait time between completing the update for all virtual machines in one batch and starting the next batch. The time duration should be specified in ISO 8601 format. The default value is 0 seconds (PT0S).	string
prioritizeUnhealthyInstances	Upgrade all unhealthy instances in a scale set before any healthy instances.	bool

VirtualMachineScaleSetVMProfile

Name	Description	Value
applicationProfile	Specifies the gallery applications that should be made available to the VM/VMSS	ApplicationProfile
billingProfile	Specifies the billing related details of a Azure Spot VMSS. Minimum api-version: 2019-03-01.	BillingProfile
capacityReservation	Specifies the capacity reservation related details of a scale set. Minimum api-version: 2021-04-01.	CapacityReservationProfile
diagnosticsProfile	Specifies the boot diagnostic settings state. Minimum api-version: 2015-06-15.	DiagnosticsProfile
evictionPolicy	Specifies the eviction policy for the Azure Spot virtual machine and Azure Spot scale set. For Azure Spot virtual machines, both 'Deallocate' and 'Delete' are supported and the minimum api-version is 2019-03-01. For Azure Spot scale sets, both 'Deallocate' and 'Delete' are supported and the minimum api-version is 2017-10-30-preview.	'Deallocate' 'Delete'
extensionProfile	Specifies a collection of settings for extensions installed on virtual machines in the scale set.	VirtualMachineScaleSetExtensionProfile
licenseType	Specifies that the image or disk that is being used was licensed on-premises. Possible values for Windows Server operating system are: Windows_Client Windows_Server Possible values for Linux Server operating system are: RHEL_BYOS (for RHEL) SLES_BYOS (for SUSE) For more information, see Azure Hybrid Use Benefit for Windows Server Azure Hybrid Use Benefit for Linux Server Minimum api-version: 2015-06-15	string
networkProfile	Specifies properties of the network interfaces of the virtual machines in the scale set.	VirtualMachineScaleSetNetworkProfile
osProfile	Specifies the operating system settings for the virtual machines in the scale set.	VirtualMachineScaleSetOSProfile
priority	Specifies the priority for the virtual machines in the scale set. Minimum api-version: 2017-10-30-preview	'Low' 'Regular' 'Spot'
scheduledEventsProfile	Specifies Scheduled Event related configurations.	ScheduledEventsProfile
securityProfile	Specifies the Security related profile settings for the virtual machines in the scale set.	SecurityProfile
storageProfile	Specifies the storage settings for the virtual machine disks.	VirtualMachineScaleSetStorageProfile
userData	UserData for the virtual machines in the scale set, which must be base-64 encoded. Customer should not pass any secrets in here. Minimum api-version: 2021-03-01	string

ApplicationProfile

Name	Description	Value
galleryApplications	Specifies the gallery applications that should be made available to the VM/VMSS	VMGalleryApplication[]

VMGalleryApplication

Name	Description	Value
configurationReference	Optional, Specifies the uri to an azure blob that will replace the default configuration for the package if provided	string
order	Optional, Specifies the order in which the packages have to be installed	int
packageReferenceId	Specifies the GalleryApplicationVersion resource id on the form of /subscriptions/{SubscriptionId}/resourceGroups/{ResourceGroupName}/providers/Microsoft.Compute/galleries/{galleryName}/applications/{application}/versions/{version}	string (required)
tags	Optional, Specifies a passthrough value for more generic context.	string

BillingProfile

Name	Description	Value
maxPrice	Specifies the maximum price you are willing to pay for a Azure Spot VM/VMSS. This price is in US Dollars. This price will be compared with the current Azure Spot price for the VM size. Also, the prices are compared at the time of create/update of Azure Spot VM/VMSS and the operation will only succeed if the maxPrice is greater than the current Azure Spot price. The maxPrice will also be used for evicting a Azure Spot VM/VMSS if the current Azure Spot price goes beyond the maxPrice after creation of VM/VMSS. Possible values are: - Any decimal value greater than zero. Example: 0.01538 -1 – indicates default price to be up-to on-demand. You can set the maxPrice to -1 to indicate that the Azure Spot VM/VMSS should not be evicted for price reasons. Also, the default max price is -1 if it is not provided by you. Minimum api-version: 2019-03-01. To specify a decimal value, use the json() function.	int or json decimal

CapacityReservationProfile

Name	Description	Value
capacityReservationGroup	Specifies the capacity reservation group resource id that should be used for allocating the virtual machine or scaleset vm instances provided enough capacity has been reserved. Please refer to https://aka.ms/CapacityReservation for more details.	SubResource

DiagnosticsProfile

Name	Description	Value
bootDiagnostics	Boot Diagnostics is a debugging feature which allows you to view Console Output and Screenshot to diagnose VM status. NOTE: If storageUri is being specified then ensure that the storage account is in the same region and subscription as the VM. You can easily view the output of your console log. Azure also enables you to see a screenshot of the VM from the hypervisor.	BootDiagnostics

BootDiagnostics

Name	Description	Value
enabled	Whether boot diagnostics should be enabled on the Virtual Machine.	bool
storageUri	Uri of the storage account to use for placing the console output and screenshot. If storageUri is not specified while enabling boot diagnostics, managed storage will be used.	string

VirtualMachineScaleSetExtensionProfile

Name	Description	Value
extensions	The virtual machine scale set child extension resources.	VirtualMachineScaleSetExtension[]
extensionsTimeBudget	Specifies the time alloted for all extensions to start. The time duration should be between 15 minutes and 120 minutes (inclusive) and should be specified in ISO 8601 format. The default value is 90 minutes (PT1H30M). Minimum api-version: 2020-06-01	string

VirtualMachineScaleSetExtension

Name	Description	Value
name	The name of the extension.	string
properties	Describes the properties of a Virtual Machine Scale Set Extension.	VirtualMachineScaleSetExtensionProperties

VirtualMachineScaleSetExtensionProperties

Name	Description	Value
autoUpgradeMinorVersion	Indicates whether the extension should use a newer minor version if one is available at deployment time. Once deployed, however, the extension will not upgrade minor versions unless redeployed, even with this property set to true.	bool
enableAutomaticUpgrade	Indicates whether the extension should be automatically upgraded by the platform if there is a newer version of the extension available.	bool
forceUpdateTag	If a value is provided and is different from the previous value, the extension handler will be forced to update even if the extension configuration has not changed.	string
protectedSettings	The extension can contain either protectedSettings or protectedSettingsFromKeyVault or no protected settings at all.
provisionAfterExtensions	Collection of extension names after which this extension needs to be provisioned.	string[]
publisher	The name of the extension handler publisher.	string
settings	Json formatted public settings for the extension.
suppressFailures	Indicates whether failures stemming from the extension will be suppressed (Operational failures such as not connecting to the VM will not be suppressed regardless of this value). The default is false.	bool
type	Specifies the type of the extension; an example is "CustomScriptExtension".	string
typeHandlerVersion	Specifies the version of the script handler.	string

VirtualMachineScaleSetNetworkProfile

Name	Description	Value
healthProbe	A reference to a load balancer probe used to determine the health of an instance in the virtual machine scale set. The reference will be in the form: '/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.Network/loadBalancers/{loadBalancerName}/probes/{probeName}'.	ApiEntityReference
networkApiVersion	specifies the Microsoft.Network API version used when creating networking resources in the Network Interface Configurations for Virtual Machine Scale Set with orchestration mode 'Flexible'	'2020-11-01'
networkInterfaceConfigurations	The list of network configurations.	VirtualMachineScaleSetNetworkConfiguration[]

ApiEntityReference

Name	Description	Value
id	The ARM resource id in the form of /subscriptions/{SubscriptionId}/resourceGroups/{ResourceGroupName}/...	string

VirtualMachineScaleSetNetworkConfiguration

Name	Description	Value
id	Resource Id	string
name	The network configuration name.	string (required)
properties	Describes a virtual machine scale set network profile's IP configuration.	VirtualMachineScaleSetNetworkConfigurationProperties

VirtualMachineScaleSetNetworkConfigurationProperties

Name	Description	Value
deleteOption	Specify what happens to the network interface when the VM is deleted	'Delete' 'Detach'
dnsSettings	The dns settings to be applied on the network interfaces.	VirtualMachineScaleSetNetworkConfigurationDnsSetting...
enableAcceleratedNetworking	Specifies whether the network interface is accelerated networking-enabled.	bool
enableFpga	Specifies whether the network interface is FPGA networking-enabled.	bool
enableIPForwarding	Whether IP forwarding enabled on this NIC.	bool
ipConfigurations	Specifies the IP configurations of the network interface.	VirtualMachineScaleSetIPConfiguration[] (required)
networkSecurityGroup	The network security group.	SubResource
primary	Specifies the primary network interface in case the virtual machine has more than 1 network interface.	bool

VirtualMachineScaleSetNetworkConfigurationDnsSetting...

Name	Description	Value
dnsServers	List of DNS servers IP addresses	string[]

VirtualMachineScaleSetIPConfiguration

Name	Description	Value
id	Resource Id	string
name	The IP configuration name.	string (required)
properties	Describes a virtual machine scale set network profile's IP configuration properties.	VirtualMachineScaleSetIPConfigurationProperties

VirtualMachineScaleSetIPConfigurationProperties

Name	Description	Value
applicationGatewayBackendAddressPools	Specifies an array of references to backend address pools of application gateways. A scale set can reference backend address pools of multiple application gateways. Multiple scale sets cannot use the same application gateway.	SubResource[]
applicationSecurityGroups	Specifies an array of references to application security group.	SubResource[]
loadBalancerBackendAddressPools	Specifies an array of references to backend address pools of load balancers. A scale set can reference backend address pools of one public and one internal load balancer. Multiple scale sets cannot use the same basic sku load balancer.	SubResource[]
loadBalancerInboundNatPools	Specifies an array of references to inbound Nat pools of the load balancers. A scale set can reference inbound nat pools of one public and one internal load balancer. Multiple scale sets cannot use the same basic sku load balancer.	SubResource[]
primary	Specifies the primary network interface in case the virtual machine has more than 1 network interface.	bool
privateIPAddressVersion	Available from Api-Version 2017-03-30 onwards, it represents whether the specific ipconfiguration is IPv4 or IPv6. Default is taken as IPv4. Possible values are: 'IPv4' and 'IPv6'.	'IPv4' 'IPv6'
publicIPAddressConfiguration	The publicIPAddressConfiguration.	VirtualMachineScaleSetPublicIPAddressConfiguration
subnet	Specifies the identifier of the subnet.	ApiEntityReference

VirtualMachineScaleSetPublicIPAddressConfiguration

Name	Description	Value
name	The publicIP address configuration name.	string (required)
properties	Describes a virtual machines scale set IP Configuration's PublicIPAddress configuration	VirtualMachineScaleSetPublicIPAddressConfigurationPr...
sku	Describes the public IP Sku	PublicIPAddressSku

VirtualMachineScaleSetPublicIPAddressConfigurationPr...

Name	Description	Value
deleteOption	Specify what happens to the public IP when the VM is deleted	'Delete' 'Detach'
dnsSettings	The dns settings to be applied on the publicIP addresses .	VirtualMachineScaleSetPublicIPAddressConfigurationDn...
idleTimeoutInMinutes	The idle timeout of the public IP address.	int
ipTags	The list of IP tags associated with the public IP address.	VirtualMachineScaleSetIpTag[]
publicIPAddressVersion	Available from Api-Version 2019-07-01 onwards, it represents whether the specific ipconfiguration is IPv4 or IPv6. Default is taken as IPv4. Possible values are: 'IPv4' and 'IPv6'.	'IPv4' 'IPv6'
publicIPPrefix	The PublicIPPrefix from which to allocate publicIP addresses.	SubResource

VirtualMachineScaleSetPublicIPAddressConfigurationDn...

Name	Description	Value
domainNameLabel	The Domain name label.The concatenation of the domain name label and vm index will be the domain name labels of the PublicIPAddress resources that will be created	string (required)

VirtualMachineScaleSetIpTag

Name	Description	Value
ipTagType	IP tag type. Example: FirstPartyUsage.	string
tag	IP tag associated with the public IP. Example: SQL, Storage etc.	string

PublicIPAddressSku

Name	Description	Value
name	Specify public IP sku name	'Basic' 'Standard'
tier	Specify public IP sku tier	'Global' 'Regional'

VirtualMachineScaleSetOSProfile

Name	Description	Value
adminPassword	Specifies the password of the administrator account. Minimum-length (Windows): 8 characters Minimum-length (Linux): 6 characters Max-length (Windows): 123 characters Max-length (Linux): 72 characters Complexity requirements: 3 out of 4 conditions below need to be fulfilled Has lower characters Has upper characters Has a digit Has a special character (Regex match [\W_]) Disallowed values: "abc@123", "P@$$w0rd", "P@ssw0rd", "P@ssword123", "Pa$$word", "pass@word1", "Password!", "Password1", "Password22", "iloveyou!" For resetting the password, see How to reset the Remote Desktop service or its login password in a Windows VM For resetting root password, see Manage users, SSH, and check or repair disks on Azure Linux VMs using the VMAccess Extension	string Constraints: Sensitive value. Pass in as a secure parameter.
adminUsername	Specifies the name of the administrator account. Windows-only restriction: Cannot end in "." Disallowed values: "administrator", "admin", "user", "user1", "test", "user2", "test1", "user3", "admin1", "1", "123", "a", "actuser", "adm", "admin2", "aspnet", "backup", "console", "david", "guest", "john", "owner", "root", "server", "sql", "support", "support_388945a0", "sys", "test2", "test3", "user4", "user5". Minimum-length (Linux): 1 character Max-length (Linux): 64 characters Max-length (Windows): 20 characters	string
computerNamePrefix	Specifies the computer name prefix for all of the virtual machines in the scale set. Computer name prefixes must be 1 to 15 characters long.	string
customData	Specifies a base-64 encoded string of custom data. The base-64 encoded string is decoded to a binary array that is saved as a file on the Virtual Machine. The maximum length of the binary array is 65535 bytes. For using cloud-init for your VM, see Using cloud-init to customize a Linux VM during creation	string
linuxConfiguration	Specifies the Linux operating system settings on the virtual machine. For a list of supported Linux distributions, see Linux on Azure-Endorsed Distributions.	LinuxConfiguration
secrets	Specifies set of certificates that should be installed onto the virtual machines in the scale set. To install certificates on a virtual machine it is recommended to use the Azure Key Vault virtual machine extension for Linux or the Azure Key Vault virtual machine extension for Windows.	VaultSecretGroup[]
windowsConfiguration	Specifies Windows operating system settings on the virtual machine.	WindowsConfiguration

LinuxConfiguration

Name	Description	Value
disablePasswordAuthentication	Specifies whether password authentication should be disabled.	bool
patchSettings	[Preview Feature] Specifies settings related to VM Guest Patching on Linux.	LinuxPatchSettings
provisionVMAgent	Indicates whether virtual machine agent should be provisioned on the virtual machine. When this property is not specified in the request body, default behavior is to set it to true. This will ensure that VM Agent is installed on the VM so that extensions can be added to the VM later.	bool
ssh	Specifies the ssh key configuration for a Linux OS.	SshConfiguration

LinuxPatchSettings

Name	Description	Value
assessmentMode	Specifies the mode of VM Guest Patch Assessment for the IaaS virtual machine. Possible values are: ImageDefault - You control the timing of patch assessments on a virtual machine. AutomaticByPlatform - The platform will trigger periodic patch assessments. The property provisionVMAgent must be true.	'AutomaticByPlatform' 'ImageDefault'
patchMode	Specifies the mode of VM Guest Patching to IaaS virtual machine or virtual machines associated to virtual machine scale set with OrchestrationMode as Flexible. Possible values are: ImageDefault - The virtual machine's default patching configuration is used. AutomaticByPlatform - The virtual machine will be automatically updated by the platform. The property provisionVMAgent must be true	'AutomaticByPlatform' 'ImageDefault'

SshConfiguration

Name	Description	Value
publicKeys	The list of SSH public keys used to authenticate with linux based VMs.	SshPublicKey[]

SshPublicKey

Name	Description	Value
keyData	SSH public key certificate used to authenticate with the VM through ssh. The key needs to be at least 2048-bit and in ssh-rsa format. For creating ssh keys, see [Create SSH keys on Linux and Mac for Linux VMs in Azure]/azure/virtual-machines/linux/create-ssh-keys-detailed).	string
path	Specifies the full path on the created VM where ssh public key is stored. If the file already exists, the specified key is appended to the file. Example: /home/user/.ssh/authorized_keys	string

VaultSecretGroup

Name	Description	Value
sourceVault	The relative URL of the Key Vault containing all of the certificates in VaultCertificates.	SubResource
vaultCertificates	The list of key vault references in SourceVault which contain certificates.	VaultCertificate[]

VaultCertificate

Name	Description	Value
certificateStore	For Windows VMs, specifies the certificate store on the Virtual Machine to which the certificate should be added. The specified certificate store is implicitly in the LocalMachine account. For Linux VMs, the certificate file is placed under the /var/lib/waagent directory, with the file name <UppercaseThumbprint>.crt for the X509 certificate file and <UppercaseThumbprint>.prv for private key. Both of these files are .pem formatted.	string
certificateUrl	This is the URL of a certificate that has been uploaded to Key Vault as a secret. For adding a secret to the Key Vault, see Add a key or secret to the key vault. In this case, your certificate needs to be It is the Base64 encoding of the following JSON Object which is encoded in UTF-8: { "data":"{Base64-encoded-certificate}", "dataType":"pfx", "password":"{pfx-file-password}" } To install certificates on a virtual machine it is recommended to use the Azure Key Vault virtual machine extension for Linux or the Azure Key Vault virtual machine extension for Windows.	string

WindowsConfiguration

Name	Description	Value
additionalUnattendContent	Specifies additional base-64 encoded XML formatted information that can be included in the Unattend.xml file, which is used by Windows Setup.	AdditionalUnattendContent[]
enableAutomaticUpdates	Indicates whether Automatic Updates is enabled for the Windows virtual machine. Default value is true. For virtual machine scale sets, this property can be updated and updates will take effect on OS reprovisioning.	bool
patchSettings	[Preview Feature] Specifies settings related to VM Guest Patching on Windows.	PatchSettings
provisionVMAgent	Indicates whether virtual machine agent should be provisioned on the virtual machine. When this property is not specified in the request body, default behavior is to set it to true. This will ensure that VM Agent is installed on the VM so that extensions can be added to the VM later.	bool
timeZone	Specifies the time zone of the virtual machine. e.g. "Pacific Standard Time". Possible values can be TimeZoneInfo.Id value from time zones returned by TimeZoneInfo.GetSystemTimeZones.	string
winRM	Specifies the Windows Remote Management listeners. This enables remote Windows PowerShell.	WinRMConfiguration

AdditionalUnattendContent

Name	Description	Value
componentName	The component name. Currently, the only allowable value is Microsoft-Windows-Shell-Setup.	'Microsoft-Windows-Shell-Setup'
content	Specifies the XML formatted content that is added to the unattend.xml file for the specified path and component. The XML must be less than 4KB and must include the root element for the setting or feature that is being inserted.	string
passName	The pass name. Currently, the only allowable value is OobeSystem.	'OobeSystem'
settingName	Specifies the name of the setting to which the content applies. Possible values are: FirstLogonCommands and AutoLogon.	'AutoLogon' 'FirstLogonCommands'

PatchSettings

Name	Description	Value
assessmentMode	Specifies the mode of VM Guest patch assessment for the IaaS virtual machine. Possible values are: ImageDefault - You control the timing of patch assessments on a virtual machine. AutomaticByPlatform - The platform will trigger periodic patch assessments. The property provisionVMAgent must be true.	'AutomaticByPlatform' 'ImageDefault'
enableHotpatching	Enables customers to patch their Azure VMs without requiring a reboot. For enableHotpatching, the 'provisionVMAgent' must be set to true and 'patchMode' must be set to 'AutomaticByPlatform'.	bool
patchMode	Specifies the mode of VM Guest Patching to IaaS virtual machine or virtual machines associated to virtual machine scale set with OrchestrationMode as Flexible. Possible values are: Manual - You control the application of patches to a virtual machine. You do this by applying patches manually inside the VM. In this mode, automatic updates are disabled; the property WindowsConfiguration.enableAutomaticUpdates must be false AutomaticByOS - The virtual machine will automatically be updated by the OS. The property WindowsConfiguration.enableAutomaticUpdates must be true. AutomaticByPlatform - the virtual machine will automatically updated by the platform. The properties provisionVMAgent and WindowsConfiguration.enableAutomaticUpdates must be true	'AutomaticByOS' 'AutomaticByPlatform' 'Manual'

WinRMConfiguration

Name	Description	Value
listeners	The list of Windows Remote Management listeners	WinRMListener[]

WinRMListener

Name	Description	Value
certificateUrl	This is the URL of a certificate that has been uploaded to Key Vault as a secret. For adding a secret to the Key Vault, see Add a key or secret to the key vault. In this case, your certificate needs to be It is the Base64 encoding of the following JSON Object which is encoded in UTF-8: { "data":"{Base64-encoded-certificate}", "dataType":"pfx", "password":"{pfx-file-password}" } To install certificates on a virtual machine it is recommended to use the Azure Key Vault virtual machine extension for Linux or the Azure Key Vault virtual machine extension for Windows.	string
protocol	Specifies the protocol of WinRM listener. Possible values are: http https	'Http' 'Https'

ScheduledEventsProfile

Name	Description	Value
terminateNotificationProfile	Specifies Terminate Scheduled Event related configurations.	TerminateNotificationProfile

TerminateNotificationProfile

Name	Description	Value
enable	Specifies whether the Terminate Scheduled event is enabled or disabled.	bool
notBeforeTimeout	Configurable length of time a Virtual Machine being deleted will have to potentially approve the Terminate Scheduled Event before the event is auto approved (timed out). The configuration must be specified in ISO 8601 format, the default value is 5 minutes (PT5M)	string

SecurityProfile

Name	Description	Value
encryptionAtHost	This property can be used by user in the request to enable or disable the Host Encryption for the virtual machine or virtual machine scale set. This will enable the encryption for all the disks including Resource/Temp disk at host itself. Default: The Encryption at host will be disabled unless this property is set to true for the resource.	bool
securityType	Specifies the SecurityType of the virtual machine. It is set as TrustedLaunch to enable UefiSettings. Default: UefiSettings will not be enabled unless this property is set as TrustedLaunch.	'TrustedLaunch'
uefiSettings	Specifies the security settings like secure boot and vTPM used while creating the virtual machine. Minimum api-version: 2020-12-01	UefiSettings

UefiSettings

Name	Description	Value
secureBootEnabled	Specifies whether secure boot should be enabled on the virtual machine. Minimum api-version: 2020-12-01	bool
vTpmEnabled	Specifies whether vTPM should be enabled on the virtual machine. Minimum api-version: 2020-12-01	bool

VirtualMachineScaleSetStorageProfile

Name	Description	Value
dataDisks	Specifies the parameters that are used to add data disks to the virtual machines in the scale set. For more information about disks, see About disks and VHDs for Azure virtual machines.	VirtualMachineScaleSetDataDisk[]
imageReference	Specifies information about the image to use. You can specify information about platform images, marketplace images, or virtual machine images. This element is required when you want to use a platform image, marketplace image, or virtual machine image, but is not used in other creation operations.	ImageReference
osDisk	Specifies information about the operating system disk used by the virtual machines in the scale set. For more information about disks, see About disks and VHDs for Azure virtual machines.	VirtualMachineScaleSetOSDisk

VirtualMachineScaleSetDataDisk

Name	Description	Value
caching	Specifies the caching requirements. Possible values are: None ReadOnly ReadWrite Default: None for Standard storage. ReadOnly for Premium storage	'None' 'ReadOnly' 'ReadWrite'
createOption	The create option.	'Attach' 'Empty' 'FromImage' (required)
diskIOPSReadWrite	Specifies the Read-Write IOPS for the managed disk. Should be used only when StorageAccountType is UltraSSD_LRS. If not specified, a default value would be assigned based on diskSizeGB.	int
diskMBpsReadWrite	Specifies the bandwidth in MB per second for the managed disk. Should be used only when StorageAccountType is UltraSSD_LRS. If not specified, a default value would be assigned based on diskSizeGB.	int
diskSizeGB	Specifies the size of an empty data disk in gigabytes. This element can be used to overwrite the size of the disk in a virtual machine image. This value cannot be larger than 1023 GB	int
lun	Specifies the logical unit number of the data disk. This value is used to identify data disks within the VM and therefore must be unique for each data disk attached to a VM.	int (required)
managedDisk	The managed disk parameters.	VirtualMachineScaleSetManagedDiskParameters
name	The disk name.	string
writeAcceleratorEnabled	Specifies whether writeAccelerator should be enabled or disabled on the disk.	bool

VirtualMachineScaleSetManagedDiskParameters

Name	Description	Value
diskEncryptionSet	Specifies the customer managed disk encryption set resource id for the managed disk.	DiskEncryptionSetParameters
storageAccountType	Specifies the storage account type for the managed disk. NOTE: UltraSSD_LRS can only be used with data disks, it cannot be used with OS Disk.	'Premium_LRS' 'Premium_ZRS' 'StandardSSD_LRS' 'StandardSSD_ZRS' 'Standard_LRS' 'UltraSSD_LRS'

DiskEncryptionSetParameters

Name	Description	Value
id	Resource Id	string

ImageReference

Name	Description	Value
id	Resource Id	string
offer	Specifies the offer of the platform image or marketplace image used to create the virtual machine.	string
publisher	The image publisher.	string
sharedGalleryImageId	Specified the shared gallery image unique id for vm deployment. This can be fetched from shared gallery image GET call.	string
sku	The image SKU.	string
version	Specifies the version of the platform image or marketplace image used to create the virtual machine. The allowed formats are Major.Minor.Build or 'latest'. Major, Minor, and Build are decimal numbers. Specify 'latest' to use the latest version of an image available at deploy time. Even if you use 'latest', the VM image will not automatically update after deploy time even if a new version becomes available.	string

VirtualMachineScaleSetOSDisk

Name	Description	Value
caching	Specifies the caching requirements. Possible values are: None ReadOnly ReadWrite Default: None for Standard storage. ReadOnly for Premium storage	'None' 'ReadOnly' 'ReadWrite'
createOption	Specifies how the virtual machines in the scale set should be created. The only allowed value is: FromImage \u2013 This value is used when you are using an image to create the virtual machine. If you are using a platform image, you also use the imageReference element described above. If you are using a marketplace image, you also use the plan element previously described.	'Attach' 'Empty' 'FromImage' (required)
diffDiskSettings	Specifies the ephemeral disk Settings for the operating system disk used by the virtual machine scale set.	DiffDiskSettings
diskSizeGB	Specifies the size of the operating system disk in gigabytes. This element can be used to overwrite the size of the disk in a virtual machine image. This value cannot be larger than 1023 GB	int
image	Specifies information about the unmanaged user image to base the scale set on.	VirtualHardDisk
managedDisk	The managed disk parameters.	VirtualMachineScaleSetManagedDiskParameters
name	The disk name.	string
osType	This property allows you to specify the type of the OS that is included in the disk if creating a VM from user-image or a specialized VHD. Possible values are: Windows Linux	'Linux' 'Windows'
vhdContainers	Specifies the container urls that are used to store operating system disks for the scale set.	string[]
writeAcceleratorEnabled	Specifies whether writeAccelerator should be enabled or disabled on the disk.	bool

DiffDiskSettings

Name	Description	Value
option	Specifies the ephemeral disk settings for operating system disk.	'Local'
placement	Specifies the ephemeral disk placement for operating system disk. Possible values are: CacheDisk ResourceDisk Default: CacheDisk if one is configured for the VM size otherwise ResourceDisk is used. Refer to VM size documentation for Windows VM at /azure/virtual-machines/windows/sizes and Linux VM at /azure/virtual-machines/linux/sizes to check which VM sizes exposes a cache disk.	'CacheDisk' 'ResourceDisk'

VirtualHardDisk

Name	Description	Value
uri	Specifies the virtual hard disk's uri.	string

Sku

Name	Description	Value
capacity	Specifies the number of virtual machines in the scale set.	int
name	The sku name.	string
tier	Specifies the tier of virtual machines in a scale set. Possible Values: Standard Basic	string

Quickstart templates

The following quickstart templates deploy this resource type.

Template	Description
Deploy VM Scale Set with LB probe and automatic repairs	This template allows you to deploy a VM scale set of Linux VMs behind a load balancer with health probe configured. The scale set also has automatic instance repairs policy enabled with a grace period of 30 minutes.
Deploy a VMSS that connects each VM to an Azure Files share	This template deploys an Ubuntu Virtual Machine Scale Set and uses a custom script extension to connect each VM to an Azure Files share
Deploy a Windows VM Scale Set with a Custom Script Extension	This template allows you to deploy a VM Scale Set of Windows VMs using the lastest patched version of various Windows Versions. These VMs have a custom script extension for customization and are behind a load balancer with NAT rules for rdp connections.
Deploy a Scale Set into an existing vnet	This template deploys a VM Scale Set into an exsisting vnet.
Add multiple VMs into a Virtual Machine Scale Set	This template will create N number of VM's with managed disks, public IPs and network interfaces. It will create the VMs in a Virtual Machine Scale Set in Flexible Orchestration mode. They will be provisioned in a Virtual Network which will also be created as part of the deployment
VMSS Flexible Orchestration Mode Quickstart Linux	This template deploys a simple VM Scale Set with instances behind an Azure Load Balancer. The VM Scale set is in Flexible Orchestration Mode. Use the os parameter to choose Linux (Ubuntu) or Windows (Windows Server Datacenter 2019) deployment. NOTE: This quickstart template enables network access to VM management ports (SSH, RDP) from any internet address, and should not be used for production deployments.
Deploy a VM Scale Set with Linux VMs behind ILB	This template allows you to deploy a VM Scale Set of Linux VMs using the latest patched version of Ubuntu Linux 15.10 or 14.04.4-LTS. These VMs are behind an internal load balancer with NAT rules for ssh connections.
Deploy a VM Scale Set with a Linux custom image	This template allows you to deploy a custom VM Linux image inside an Scale Set. These VMs are behind a load balancer with HTTP load balancing (by default on port 80). The example uses a custom script to do the application deployment and update, you may have to provide your custom script for your own update procedure. You will have to provide a generalized image of your VM in the same subscription and region where you create the VMSS.
Deploy a simple VM Scale Set with Linux VMs	This template allows you to deploy a simple VM Scale Set of Linux VMs using the latest patched version of Ubuntu Linux 14.04.4-LTS or 16.04-LTS. These VMs are behind a load balancer with NAT rules for ssh connections.
Deploy a VM Scale Set with Linux VMs in Availabilty Zones	This template allows you to deploy a simple VM Scale Set of Linux VMs using the latest patched version of Ubuntu Linux 14.04.4-LTS or 16.04-LTS. These VMs are behind a load balancer with NAT rules for ssh connections.
Deploy a Linux VMSS wth primary/secondary architecture	This template allows you to deploy a Linux VMSS with a Custom Script Extension in primary secondary architecture
Simple VM Scale Set with Linux VMs and public IPv4 per VM	This template demonstrates deploying a simple scale set with load balancer, inbound NAT rules, and public IP per VM.
Deploy a trusted launch capable Windows VM Scale Set	This template allows you to deploy a trusted launch capable VM Scale Set of Windows VMs using the latest patched version of Windows Server 2016, Windows Server 2019 or Windows Server 2022 Azure Edition. These VMs are behind a load balancer with NAT rules for RDP connections. If you enable Secureboot and vTPM, the Guest Attestation extension will be installed on your VMSS. This extension will perform remote attestation by the cloud.
Deploy an Ubuntu VM scale set with Azure Application Gateway	This template allows you to deploy a simple Ubuntu VM Scale Set integrated with Azure Application Gateway, and supports up to 1000 VMs
Deploy a VM Scale Set with Linux VMs and Auto Scale	This template allows you to deploy a simple VM Scale Set of Linux VMs using the latest patched version of Ubuntu Linux 15.04 or 14.04.4-LTS. These VMs are behind a load balancer with NAT rules for ssh connections.They also have Auto Scale integrated
SSL enabled VM Scale Set	Deploys web servers configures with SSL certificates deployed securely form Azure Key Vault
Deploy a Scale Set into an existing vnet on Windows	This template deploys a Windows 2016 Datacenter VM Scale Set into an exsisting resource group, vnet and subnet.
Deploy a Windows VM scale set with Azure Application Gateway	This template allows you to deploy a simple Windows VM Scale Set integrated with Azure Application Gateway, and supports up to 1000 VMs
Deploy a VM Scale Set with Windows VMs and Auto Scale	This template allows you to deploy a simple VM Scale Set of Windows VMs using the latest patched version of Windows 2008-R2-SP1, 2012-Datacenter, or 2012-R2-Datacenter. These VMs are behind a load balancer with NAT rules for RDP connections. They also have Auto Scale integrated
Deploy a VM Scale Set with a Windows custom image	This template allows you to deploy a simple VM Scale Set usng a custom Windows image. These VMs are behind a load balancer with HTTP load balancing (by default on port 80)
Deploy a simple VM Scale Set with Windows VMs	This template allows you to deploy a simple VM Scale Set of Windows VMs using the lastest patched version of various Windows Versions. These VMs are behind a load balancer with NAT rules for rdp connections.
Deploy a VM Scale Set with Windows VMs in Availability Zones	This template allows you to deploy a VM Scale Set of Windows VMs using the lastest patched version of various Windows Versions. These VMs are behind a load balancer with NAT rules for rdp connections.
VMSS with Public IP Prefix	Template for deploying VMSS with Public IP Prefix

Terraform (AzAPI provider) resource definition

The virtualMachineScaleSets resource type can be deployed with operations that target:

• Resource groups

For a list of changed properties in each API version, see change log.

Resource format

To create a Microsoft.Compute/virtualMachineScaleSets resource, add the following Terraform to your template.

resource "azapi_resource" "symbolicname" {
  type = "Microsoft.Compute/virtualMachineScaleSets@2021-07-01"
  name = "string"
  location = "string"
  parent_id = "string"
  tags = {
    tagName1 = "tagValue1"
    tagName2 = "tagValue2"
  }
  identity {
    type = "string"
    identity_ids = []
  }
  body = jsonencode({
    properties = {
      additionalCapabilities = {
        hibernationEnabled = bool
        ultraSSDEnabled = bool
      }
      automaticRepairsPolicy = {
        enabled = bool
        gracePeriod = "string"
      }
      doNotRunExtensionsOnOverprovisionedVMs = bool
      hostGroup = {
        id = "string"
      }
      orchestrationMode = "string"
      overprovision = bool
      platformFaultDomainCount = int
      proximityPlacementGroup = {
        id = "string"
      }
      scaleInPolicy = {
        forceDeletion = bool
        rules = [
          "string"
        ]
      }
      singlePlacementGroup = bool
      spotRestorePolicy = {
        enabled = bool
        restoreTimeout = "string"
      }
      upgradePolicy = {
        automaticOSUpgradePolicy = {
          disableAutomaticRollback = bool
          enableAutomaticOSUpgrade = bool
        }
        mode = "string"
        rollingUpgradePolicy = {
          enableCrossZoneUpgrade = bool
          maxBatchInstancePercent = int
          maxUnhealthyInstancePercent = int
          maxUnhealthyUpgradedInstancePercent = int
          pauseTimeBetweenBatches = "string"
          prioritizeUnhealthyInstances = bool
        }
      }
      virtualMachineProfile = {
        applicationProfile = {
          galleryApplications = [
            {
              configurationReference = "string"
              order = int
              packageReferenceId = "string"
              tags = "string"
            }
          ]
        }
        billingProfile = {
          maxPrice = "decimal-as-string"
        }
        capacityReservation = {
          capacityReservationGroup = {
            id = "string"
          }
        }
        diagnosticsProfile = {
          bootDiagnostics = {
            enabled = bool
            storageUri = "string"
          }
        }
        evictionPolicy = "string"
        extensionProfile = {
          extensions = [
            {
              name = "string"
              properties = {
                autoUpgradeMinorVersion = bool
                enableAutomaticUpgrade = bool
                forceUpdateTag = "string"
                provisionAfterExtensions = [
                  "string"
                ]
                publisher = "string"
                suppressFailures = bool
                type = "string"
                typeHandlerVersion = "string"
              }
            }
          ]
          extensionsTimeBudget = "string"
        }
        licenseType = "string"
        networkProfile = {
          healthProbe = {
            id = "string"
          }
          networkApiVersion = "2020-11-01"
          networkInterfaceConfigurations = [
            {
              id = "string"
              name = "string"
              properties = {
                deleteOption = "string"
                dnsSettings = {
                  dnsServers = [
                    "string"
                  ]
                }
                enableAcceleratedNetworking = bool
                enableFpga = bool
                enableIPForwarding = bool
                ipConfigurations = [
                  {
                    id = "string"
                    name = "string"
                    properties = {
                      applicationGatewayBackendAddressPools = [
                        {
                          id = "string"
                        }
                      ]
                      applicationSecurityGroups = [
                        {
                          id = "string"
                        }
                      ]
                      loadBalancerBackendAddressPools = [
                        {
                          id = "string"
                        }
                      ]
                      loadBalancerInboundNatPools = [
                        {
                          id = "string"
                        }
                      ]
                      primary = bool
                      privateIPAddressVersion = "string"
                      publicIPAddressConfiguration = {
                        name = "string"
                        properties = {
                          deleteOption = "string"
                          dnsSettings = {
                            domainNameLabel = "string"
                          }
                          idleTimeoutInMinutes = int
                          ipTags = [
                            {
                              ipTagType = "string"
                              tag = "string"
                            }
                          ]
                          publicIPAddressVersion = "string"
                          publicIPPrefix = {
                            id = "string"
                          }
                        }
                        sku = {
                          name = "string"
                          tier = "string"
                        }
                      }
                      subnet = {
                        id = "string"
                      }
                    }
                  }
                ]
                networkSecurityGroup = {
                  id = "string"
                }
                primary = bool
              }
            }
          ]
        }
        osProfile = {
          adminPassword = "string"
          adminUsername = "string"
          computerNamePrefix = "string"
          customData = "string"
          linuxConfiguration = {
            disablePasswordAuthentication = bool
            patchSettings = {
              assessmentMode = "string"
              patchMode = "string"
            }
            provisionVMAgent = bool
            ssh = {
              publicKeys = [
                {
                  keyData = "string"
                  path = "string"
                }
              ]
            }
          }
          secrets = [
            {
              sourceVault = {
                id = "string"
              }
              vaultCertificates = [
                {
                  certificateStore = "string"
                  certificateUrl = "string"
                }
              ]
            }
          ]
          windowsConfiguration = {
            additionalUnattendContent = [
              {
                componentName = "Microsoft-Windows-Shell-Setup"
                content = "string"
                passName = "OobeSystem"
                settingName = "string"
              }
            ]
            enableAutomaticUpdates = bool
            patchSettings = {
              assessmentMode = "string"
              enableHotpatching = bool
              patchMode = "string"
            }
            provisionVMAgent = bool
            timeZone = "string"
            winRM = {
              listeners = [
                {
                  certificateUrl = "string"
                  protocol = "string"
                }
              ]
            }
          }
        }
        priority = "string"
        scheduledEventsProfile = {
          terminateNotificationProfile = {
            enable = bool
            notBeforeTimeout = "string"
          }
        }
        securityProfile = {
          encryptionAtHost = bool
          securityType = "TrustedLaunch"
          uefiSettings = {
            secureBootEnabled = bool
            vTpmEnabled = bool
          }
        }
        storageProfile = {
          dataDisks = [
            {
              caching = "string"
              createOption = "string"
              diskIOPSReadWrite = int
              diskMBpsReadWrite = int
              diskSizeGB = int
              lun = int
              managedDisk = {
                diskEncryptionSet = {
                  id = "string"
                }
                storageAccountType = "string"
              }
              name = "string"
              writeAcceleratorEnabled = bool
            }
          ]
          imageReference = {
            id = "string"
            offer = "string"
            publisher = "string"
            sharedGalleryImageId = "string"
            sku = "string"
            version = "string"
          }
          osDisk = {
            caching = "string"
            createOption = "string"
            diffDiskSettings = {
              option = "Local"
              placement = "string"
            }
            diskSizeGB = int
            image = {
              uri = "string"
            }
            managedDisk = {
              diskEncryptionSet = {
                id = "string"
              }
              storageAccountType = "string"
            }
            name = "string"
            osType = "string"
            vhdContainers = [
              "string"
            ]
            writeAcceleratorEnabled = bool
          }
        }
        userData = "string"
      }
      zoneBalance = bool
    }
    zones = [
      "string" or int
    ]
    sku = {
      capacity = int
      name = "string"
      tier = "string"
    }
    extendedLocation = {
      name = "string"
      type = "EdgeZone"
    }
    plan = {
      name = "string"
      product = "string"
      promotionCode = "string"
      publisher = "string"
    }
  })
}

Property values

virtualMachineScaleSets

Name	Description	Value
type	The resource type	"Microsoft.Compute/virtualMachineScaleSets@2021-07-01"
name	The resource name	string (required) Character limit: 1-15 (Windows) 1-64 (Linux) Valid characters: Can't use spaces, control characters, or these characters: ~ ! @ # $ % ^ & * ( ) = + _ [ ] { } \ | ; : . ' " , < > / ? Can't start with underscore. Can't end with period or hyphen.
location	Resource location	string (required)
parent_id	To deploy to a resource group, use the ID of that resource group.	string (required)
tags	Resource tags	Dictionary of tag names and values.
sku	The virtual machine scale set sku.	Sku
extendedLocation	The extended location of the Virtual Machine Scale Set.	ExtendedLocation
identity	The identity of the virtual machine scale set, if configured.	VirtualMachineScaleSetIdentity
plan	Specifies information about the marketplace image used to create the virtual machine. This element is only used for marketplace images. Before you can use a marketplace image from an API, you must enable the image for programmatic use. In the Azure portal, find the marketplace image that you want to use and then click Want to deploy programmatically, Get Started ->. Enter any required information and then click Save.	Plan
properties	Describes the properties of a Virtual Machine Scale Set.	VirtualMachineScaleSetProperties
zones	The virtual machine scale set zones. NOTE: Availability zones can only be set when you create the scale set	Array of availability zones as string or int.

ExtendedLocation

Name	Description	Value
name	The name of the extended location.	string
type	The type of the extended location.	"EdgeZone"

VirtualMachineScaleSetIdentity

Name	Description	Value
type	The type of identity used for the virtual machine scale set. The type 'SystemAssigned, UserAssigned' includes both an implicitly created identity and a set of user assigned identities. The type 'None' will remove any identities from the virtual machine scale set.	"SystemAssigned" "SystemAssigned, UserAssigned" "UserAssigned"
identity_ids	The list of user identities associated with the virtual machine scale set. The user identity dictionary key references will be ARM resource ids in the form: '/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.ManagedIdentity/userAssignedIdentities/{identityName}'.	Array of user identity IDs.

VirtualMachineScaleSetIdentityUserAssignedIdentities

Name	Description	Value
{customized property}		VirtualMachineScaleSetIdentityUserAssignedIdentities...

VirtualMachineScaleSetIdentityUserAssignedIdentities...

This object doesn't contain any properties to set during deployment. All properties are ReadOnly.

Plan

Name	Description	Value
name	The plan ID.	string
product	Specifies the product of the image from the marketplace. This is the same value as Offer under the imageReference element.	string
promotionCode	The promotion code.	string
publisher	The publisher ID.	string

VirtualMachineScaleSetProperties

Name	Description	Value
additionalCapabilities	Specifies additional capabilities enabled or disabled on the Virtual Machines in the Virtual Machine Scale Set. For instance: whether the Virtual Machines have the capability to support attaching managed data disks with UltraSSD_LRS storage account type.	AdditionalCapabilities
automaticRepairsPolicy	Policy for automatic repairs.	AutomaticRepairsPolicy
doNotRunExtensionsOnOverprovisionedVMs	When Overprovision is enabled, extensions are launched only on the requested number of VMs which are finally kept. This property will hence ensure that the extensions do not run on the extra overprovisioned VMs.	bool
hostGroup	Specifies information about the dedicated host group that the virtual machine scale set resides in. Minimum api-version: 2020-06-01.	SubResource
orchestrationMode	Specifies the orchestration mode for the virtual machine scale set.	"Flexible" "Uniform"
overprovision	Specifies whether the Virtual Machine Scale Set should be overprovisioned.	bool
platformFaultDomainCount	Fault Domain count for each placement group.	int
proximityPlacementGroup	Specifies information about the proximity placement group that the virtual machine scale set should be assigned to. Minimum api-version: 2018-04-01.	SubResource
scaleInPolicy	Specifies the policies applied when scaling in Virtual Machines in the Virtual Machine Scale Set.	ScaleInPolicy
singlePlacementGroup	When true this limits the scale set to a single placement group, of max size 100 virtual machines. NOTE: If singlePlacementGroup is true, it may be modified to false. However, if singlePlacementGroup is false, it may not be modified to true.	bool
spotRestorePolicy	Specifies the Spot Restore properties for the virtual machine scale set.	SpotRestorePolicy
upgradePolicy	The upgrade policy.	UpgradePolicy
virtualMachineProfile	The virtual machine profile.	VirtualMachineScaleSetVMProfile
zoneBalance	Whether to force strictly even Virtual Machine distribution cross x-zones in case there is zone outage. zoneBalance property can only be set if the zones property of the scale set contains more than one zone. If there are no zones or only one zone specified, then zoneBalance property should not be set.	bool

AdditionalCapabilities

Name	Description	Value
hibernationEnabled	The flag that enables or disables hibernation capability on the VM.	bool
ultraSSDEnabled	The flag that enables or disables a capability to have one or more managed data disks with UltraSSD_LRS storage account type on the VM or VMSS. Managed disks with storage account type UltraSSD_LRS can be added to a virtual machine or virtual machine scale set only if this property is enabled.	bool

AutomaticRepairsPolicy

Name	Description	Value
enabled	Specifies whether automatic repairs should be enabled on the virtual machine scale set. The default value is false.	bool
gracePeriod	The amount of time for which automatic repairs are suspended due to a state change on VM. The grace time starts after the state change has completed. This helps avoid premature or accidental repairs. The time duration should be specified in ISO 8601 format. The minimum allowed grace period is 30 minutes (PT30M), which is also the default value. The maximum allowed grace period is 90 minutes (PT90M).	string

SubResource

Name	Description	Value
id	Resource Id	string

ScaleInPolicy

Name	Description	Value
forceDeletion	This property allows you to specify if virtual machines chosen for removal have to be force deleted when a virtual machine scale set is being scaled-in.(Feature in Preview)	bool
rules	The rules to be followed when scaling-in a virtual machine scale set. Possible values are: Default When a virtual machine scale set is scaled in, the scale set will first be balanced across zones if it is a zonal scale set. Then, it will be balanced across Fault Domains as far as possible. Within each Fault Domain, the virtual machines chosen for removal will be the newest ones that are not protected from scale-in. OldestVM When a virtual machine scale set is being scaled-in, the oldest virtual machines that are not protected from scale-in will be chosen for removal. For zonal virtual machine scale sets, the scale set will first be balanced across zones. Within each zone, the oldest virtual machines that are not protected will be chosen for removal. NewestVM When a virtual machine scale set is being scaled-in, the newest virtual machines that are not protected from scale-in will be chosen for removal. For zonal virtual machine scale sets, the scale set will first be balanced across zones. Within each zone, the newest virtual machines that are not protected will be chosen for removal.	String array containing any of: "Default" "NewestVM" "OldestVM"

SpotRestorePolicy

Name	Description	Value
enabled	Enables the Spot-Try-Restore feature where evicted VMSS SPOT instances will be tried to be restored opportunistically based on capacity availability and pricing constraints	bool
restoreTimeout	Timeout value expressed as an ISO 8601 time duration after which the platform will not try to restore the VMSS SPOT instances	string

UpgradePolicy

Name	Description	Value
automaticOSUpgradePolicy	Configuration parameters used for performing automatic OS Upgrade.	AutomaticOSUpgradePolicy
mode	Specifies the mode of an upgrade to virtual machines in the scale set. Possible values are: Manual - You control the application of updates to virtual machines in the scale set. You do this by using the manualUpgrade action. Automatic - All virtual machines in the scale set are automatically updated at the same time.	"Automatic" "Manual" "Rolling"
rollingUpgradePolicy	The configuration parameters used while performing a rolling upgrade.	RollingUpgradePolicy

AutomaticOSUpgradePolicy

Name	Description	Value
disableAutomaticRollback	Whether OS image rollback feature should be disabled. Default value is false.	bool
enableAutomaticOSUpgrade	Indicates whether OS upgrades should automatically be applied to scale set instances in a rolling fashion when a newer version of the OS image becomes available. Default value is false. If this is set to true for Windows based scale sets, enableAutomaticUpdates is automatically set to false and cannot be set to true.	bool

RollingUpgradePolicy

Name	Description	Value
enableCrossZoneUpgrade	Allow VMSS to ignore AZ boundaries when constructing upgrade batches. Take into consideration the Update Domain and maxBatchInstancePercent to determine the batch size.	bool
maxBatchInstancePercent	The maximum percent of total virtual machine instances that will be upgraded simultaneously by the rolling upgrade in one batch. As this is a maximum, unhealthy instances in previous or future batches can cause the percentage of instances in a batch to decrease to ensure higher reliability. The default value for this parameter is 20%.	int Constraints: Min value = 5 Max value = 100
maxUnhealthyInstancePercent	The maximum percentage of the total virtual machine instances in the scale set that can be simultaneously unhealthy, either as a result of being upgraded, or by being found in an unhealthy state by the virtual machine health checks before the rolling upgrade aborts. This constraint will be checked prior to starting any batch. The default value for this parameter is 20%.	int Constraints: Min value = 5 Max value = 100
maxUnhealthyUpgradedInstancePercent	The maximum percentage of upgraded virtual machine instances that can be found to be in an unhealthy state. This check will happen after each batch is upgraded. If this percentage is ever exceeded, the rolling update aborts. The default value for this parameter is 20%.	int Constraints: Min value = 0 Max value = 100
pauseTimeBetweenBatches	The wait time between completing the update for all virtual machines in one batch and starting the next batch. The time duration should be specified in ISO 8601 format. The default value is 0 seconds (PT0S).	string
prioritizeUnhealthyInstances	Upgrade all unhealthy instances in a scale set before any healthy instances.	bool

VirtualMachineScaleSetVMProfile

Name	Description	Value
applicationProfile	Specifies the gallery applications that should be made available to the VM/VMSS	ApplicationProfile
billingProfile	Specifies the billing related details of a Azure Spot VMSS. Minimum api-version: 2019-03-01.	BillingProfile
capacityReservation	Specifies the capacity reservation related details of a scale set. Minimum api-version: 2021-04-01.	CapacityReservationProfile
diagnosticsProfile	Specifies the boot diagnostic settings state. Minimum api-version: 2015-06-15.	DiagnosticsProfile
evictionPolicy	Specifies the eviction policy for the Azure Spot virtual machine and Azure Spot scale set. For Azure Spot virtual machines, both 'Deallocate' and 'Delete' are supported and the minimum api-version is 2019-03-01. For Azure Spot scale sets, both 'Deallocate' and 'Delete' are supported and the minimum api-version is 2017-10-30-preview.	"Deallocate" "Delete"
extensionProfile	Specifies a collection of settings for extensions installed on virtual machines in the scale set.	VirtualMachineScaleSetExtensionProfile
licenseType	Specifies that the image or disk that is being used was licensed on-premises. Possible values for Windows Server operating system are: Windows_Client Windows_Server Possible values for Linux Server operating system are: RHEL_BYOS (for RHEL) SLES_BYOS (for SUSE) For more information, see Azure Hybrid Use Benefit for Windows Server Azure Hybrid Use Benefit for Linux Server Minimum api-version: 2015-06-15	string
networkProfile	Specifies properties of the network interfaces of the virtual machines in the scale set.	VirtualMachineScaleSetNetworkProfile
osProfile	Specifies the operating system settings for the virtual machines in the scale set.	VirtualMachineScaleSetOSProfile
priority	Specifies the priority for the virtual machines in the scale set. Minimum api-version: 2017-10-30-preview	"Low" "Regular" "Spot"
scheduledEventsProfile	Specifies Scheduled Event related configurations.	ScheduledEventsProfile
securityProfile	Specifies the Security related profile settings for the virtual machines in the scale set.	SecurityProfile
storageProfile	Specifies the storage settings for the virtual machine disks.	VirtualMachineScaleSetStorageProfile
userData	UserData for the virtual machines in the scale set, which must be base-64 encoded. Customer should not pass any secrets in here. Minimum api-version: 2021-03-01	string

ApplicationProfile

Name	Description	Value
galleryApplications	Specifies the gallery applications that should be made available to the VM/VMSS	VMGalleryApplication[]

VMGalleryApplication

Name	Description	Value
configurationReference	Optional, Specifies the uri to an azure blob that will replace the default configuration for the package if provided	string
order	Optional, Specifies the order in which the packages have to be installed	int
packageReferenceId	Specifies the GalleryApplicationVersion resource id on the form of /subscriptions/{SubscriptionId}/resourceGroups/{ResourceGroupName}/providers/Microsoft.Compute/galleries/{galleryName}/applications/{application}/versions/{version}	string (required)
tags	Optional, Specifies a passthrough value for more generic context.	string

BillingProfile

Name	Description	Value
maxPrice	Specifies the maximum price you are willing to pay for a Azure Spot VM/VMSS. This price is in US Dollars. This price will be compared with the current Azure Spot price for the VM size. Also, the prices are compared at the time of create/update of Azure Spot VM/VMSS and the operation will only succeed if the maxPrice is greater than the current Azure Spot price. The maxPrice will also be used for evicting a Azure Spot VM/VMSS if the current Azure Spot price goes beyond the maxPrice after creation of VM/VMSS. Possible values are: - Any decimal value greater than zero. Example: 0.01538 -1 – indicates default price to be up-to on-demand. You can set the maxPrice to -1 to indicate that the Azure Spot VM/VMSS should not be evicted for price reasons. Also, the default max price is -1 if it is not provided by you. Minimum api-version: 2019-03-01. Specify a decimal value as a string.	int or json decimal

CapacityReservationProfile

Name	Description	Value
capacityReservationGroup	Specifies the capacity reservation group resource id that should be used for allocating the virtual machine or scaleset vm instances provided enough capacity has been reserved. Please refer to https://aka.ms/CapacityReservation for more details.	SubResource

DiagnosticsProfile

Name	Description	Value
bootDiagnostics	Boot Diagnostics is a debugging feature which allows you to view Console Output and Screenshot to diagnose VM status. NOTE: If storageUri is being specified then ensure that the storage account is in the same region and subscription as the VM. You can easily view the output of your console log. Azure also enables you to see a screenshot of the VM from the hypervisor.	BootDiagnostics

BootDiagnostics

Name	Description	Value
enabled	Whether boot diagnostics should be enabled on the Virtual Machine.	bool
storageUri	Uri of the storage account to use for placing the console output and screenshot. If storageUri is not specified while enabling boot diagnostics, managed storage will be used.	string

VirtualMachineScaleSetExtensionProfile

Name	Description	Value
extensions	The virtual machine scale set child extension resources.	VirtualMachineScaleSetExtension[]
extensionsTimeBudget	Specifies the time alloted for all extensions to start. The time duration should be between 15 minutes and 120 minutes (inclusive) and should be specified in ISO 8601 format. The default value is 90 minutes (PT1H30M). Minimum api-version: 2020-06-01	string

VirtualMachineScaleSetExtension

Name	Description	Value
name	The name of the extension.	string
properties	Describes the properties of a Virtual Machine Scale Set Extension.	VirtualMachineScaleSetExtensionProperties

VirtualMachineScaleSetExtensionProperties

Name	Description	Value
autoUpgradeMinorVersion	Indicates whether the extension should use a newer minor version if one is available at deployment time. Once deployed, however, the extension will not upgrade minor versions unless redeployed, even with this property set to true.	bool
enableAutomaticUpgrade	Indicates whether the extension should be automatically upgraded by the platform if there is a newer version of the extension available.	bool
forceUpdateTag	If a value is provided and is different from the previous value, the extension handler will be forced to update even if the extension configuration has not changed.	string
protectedSettings	The extension can contain either protectedSettings or protectedSettingsFromKeyVault or no protected settings at all.
provisionAfterExtensions	Collection of extension names after which this extension needs to be provisioned.	string[]
publisher	The name of the extension handler publisher.	string
settings	Json formatted public settings for the extension.
suppressFailures	Indicates whether failures stemming from the extension will be suppressed (Operational failures such as not connecting to the VM will not be suppressed regardless of this value). The default is false.	bool
type	Specifies the type of the extension; an example is "CustomScriptExtension".	string
typeHandlerVersion	Specifies the version of the script handler.	string

VirtualMachineScaleSetNetworkProfile

Name	Description	Value
healthProbe	A reference to a load balancer probe used to determine the health of an instance in the virtual machine scale set. The reference will be in the form: '/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.Network/loadBalancers/{loadBalancerName}/probes/{probeName}'.	ApiEntityReference
networkApiVersion	specifies the Microsoft.Network API version used when creating networking resources in the Network Interface Configurations for Virtual Machine Scale Set with orchestration mode 'Flexible'	"2020-11-01"
networkInterfaceConfigurations	The list of network configurations.	VirtualMachineScaleSetNetworkConfiguration[]

ApiEntityReference

Name	Description	Value
id	The ARM resource id in the form of /subscriptions/{SubscriptionId}/resourceGroups/{ResourceGroupName}/...	string

VirtualMachineScaleSetNetworkConfiguration

Name	Description	Value
id	Resource Id	string
name	The network configuration name.	string (required)
properties	Describes a virtual machine scale set network profile's IP configuration.	VirtualMachineScaleSetNetworkConfigurationProperties

VirtualMachineScaleSetNetworkConfigurationProperties

Name	Description	Value
deleteOption	Specify what happens to the network interface when the VM is deleted	"Delete" "Detach"
dnsSettings	The dns settings to be applied on the network interfaces.	VirtualMachineScaleSetNetworkConfigurationDnsSetting...
enableAcceleratedNetworking	Specifies whether the network interface is accelerated networking-enabled.	bool
enableFpga	Specifies whether the network interface is FPGA networking-enabled.	bool
enableIPForwarding	Whether IP forwarding enabled on this NIC.	bool
ipConfigurations	Specifies the IP configurations of the network interface.	VirtualMachineScaleSetIPConfiguration[] (required)
networkSecurityGroup	The network security group.	SubResource
primary	Specifies the primary network interface in case the virtual machine has more than 1 network interface.	bool

VirtualMachineScaleSetNetworkConfigurationDnsSetting...

Name	Description	Value
dnsServers	List of DNS servers IP addresses	string[]

VirtualMachineScaleSetIPConfiguration

Name	Description	Value
id	Resource Id	string
name	The IP configuration name.	string (required)
properties	Describes a virtual machine scale set network profile's IP configuration properties.	VirtualMachineScaleSetIPConfigurationProperties

VirtualMachineScaleSetIPConfigurationProperties

Name	Description	Value
applicationGatewayBackendAddressPools	Specifies an array of references to backend address pools of application gateways. A scale set can reference backend address pools of multiple application gateways. Multiple scale sets cannot use the same application gateway.	SubResource[]
applicationSecurityGroups	Specifies an array of references to application security group.	SubResource[]
loadBalancerBackendAddressPools	Specifies an array of references to backend address pools of load balancers. A scale set can reference backend address pools of one public and one internal load balancer. Multiple scale sets cannot use the same basic sku load balancer.	SubResource[]
loadBalancerInboundNatPools	Specifies an array of references to inbound Nat pools of the load balancers. A scale set can reference inbound nat pools of one public and one internal load balancer. Multiple scale sets cannot use the same basic sku load balancer.	SubResource[]
primary	Specifies the primary network interface in case the virtual machine has more than 1 network interface.	bool
privateIPAddressVersion	Available from Api-Version 2017-03-30 onwards, it represents whether the specific ipconfiguration is IPv4 or IPv6. Default is taken as IPv4. Possible values are: 'IPv4' and 'IPv6'.	"IPv4" "IPv6"
publicIPAddressConfiguration	The publicIPAddressConfiguration.	VirtualMachineScaleSetPublicIPAddressConfiguration
subnet	Specifies the identifier of the subnet.	ApiEntityReference

VirtualMachineScaleSetPublicIPAddressConfiguration

Name	Description	Value
name	The publicIP address configuration name.	string (required)
properties	Describes a virtual machines scale set IP Configuration's PublicIPAddress configuration	VirtualMachineScaleSetPublicIPAddressConfigurationPr...
sku	Describes the public IP Sku	PublicIPAddressSku

VirtualMachineScaleSetPublicIPAddressConfigurationPr...

Name	Description	Value
deleteOption	Specify what happens to the public IP when the VM is deleted	"Delete" "Detach"
dnsSettings	The dns settings to be applied on the publicIP addresses .	VirtualMachineScaleSetPublicIPAddressConfigurationDn...
idleTimeoutInMinutes	The idle timeout of the public IP address.	int
ipTags	The list of IP tags associated with the public IP address.	VirtualMachineScaleSetIpTag[]
publicIPAddressVersion	Available from Api-Version 2019-07-01 onwards, it represents whether the specific ipconfiguration is IPv4 or IPv6. Default is taken as IPv4. Possible values are: 'IPv4' and 'IPv6'.	"IPv4" "IPv6"
publicIPPrefix	The PublicIPPrefix from which to allocate publicIP addresses.	SubResource

VirtualMachineScaleSetPublicIPAddressConfigurationDn...

Name	Description	Value
domainNameLabel	The Domain name label.The concatenation of the domain name label and vm index will be the domain name labels of the PublicIPAddress resources that will be created	string (required)

VirtualMachineScaleSetIpTag

Name	Description	Value
ipTagType	IP tag type. Example: FirstPartyUsage.	string
tag	IP tag associated with the public IP. Example: SQL, Storage etc.	string

PublicIPAddressSku

Name	Description	Value
name	Specify public IP sku name	"Basic" "Standard"
tier	Specify public IP sku tier	"Global" "Regional"

VirtualMachineScaleSetOSProfile

Name	Description	Value
adminPassword	Specifies the password of the administrator account. Minimum-length (Windows): 8 characters Minimum-length (Linux): 6 characters Max-length (Windows): 123 characters Max-length (Linux): 72 characters Complexity requirements: 3 out of 4 conditions below need to be fulfilled Has lower characters Has upper characters Has a digit Has a special character (Regex match [\W_]) Disallowed values: "abc@123", "P@$$w0rd", "P@ssw0rd", "P@ssword123", "Pa$$word", "pass@word1", "Password!", "Password1", "Password22", "iloveyou!" For resetting the password, see How to reset the Remote Desktop service or its login password in a Windows VM For resetting root password, see Manage users, SSH, and check or repair disks on Azure Linux VMs using the VMAccess Extension	string Constraints: Sensitive value. Pass in as a secure parameter.
adminUsername	Specifies the name of the administrator account. Windows-only restriction: Cannot end in "." Disallowed values: "administrator", "admin", "user", "user1", "test", "user2", "test1", "user3", "admin1", "1", "123", "a", "actuser", "adm", "admin2", "aspnet", "backup", "console", "david", "guest", "john", "owner", "root", "server", "sql", "support", "support_388945a0", "sys", "test2", "test3", "user4", "user5". Minimum-length (Linux): 1 character Max-length (Linux): 64 characters Max-length (Windows): 20 characters	string
computerNamePrefix	Specifies the computer name prefix for all of the virtual machines in the scale set. Computer name prefixes must be 1 to 15 characters long.	string
customData	Specifies a base-64 encoded string of custom data. The base-64 encoded string is decoded to a binary array that is saved as a file on the Virtual Machine. The maximum length of the binary array is 65535 bytes. For using cloud-init for your VM, see Using cloud-init to customize a Linux VM during creation	string
linuxConfiguration	Specifies the Linux operating system settings on the virtual machine. For a list of supported Linux distributions, see Linux on Azure-Endorsed Distributions.	LinuxConfiguration
secrets	Specifies set of certificates that should be installed onto the virtual machines in the scale set. To install certificates on a virtual machine it is recommended to use the Azure Key Vault virtual machine extension for Linux or the Azure Key Vault virtual machine extension for Windows.	VaultSecretGroup[]
windowsConfiguration	Specifies Windows operating system settings on the virtual machine.	WindowsConfiguration

LinuxConfiguration

Name	Description	Value
disablePasswordAuthentication	Specifies whether password authentication should be disabled.	bool
patchSettings	[Preview Feature] Specifies settings related to VM Guest Patching on Linux.	LinuxPatchSettings
provisionVMAgent	Indicates whether virtual machine agent should be provisioned on the virtual machine. When this property is not specified in the request body, default behavior is to set it to true. This will ensure that VM Agent is installed on the VM so that extensions can be added to the VM later.	bool
ssh	Specifies the ssh key configuration for a Linux OS.	SshConfiguration

LinuxPatchSettings

Name	Description	Value
assessmentMode	Specifies the mode of VM Guest Patch Assessment for the IaaS virtual machine. Possible values are: ImageDefault - You control the timing of patch assessments on a virtual machine. AutomaticByPlatform - The platform will trigger periodic patch assessments. The property provisionVMAgent must be true.	"AutomaticByPlatform" "ImageDefault"
patchMode	Specifies the mode of VM Guest Patching to IaaS virtual machine or virtual machines associated to virtual machine scale set with OrchestrationMode as Flexible. Possible values are: ImageDefault - The virtual machine's default patching configuration is used. AutomaticByPlatform - The virtual machine will be automatically updated by the platform. The property provisionVMAgent must be true	"AutomaticByPlatform" "ImageDefault"

SshConfiguration

Name	Description	Value
publicKeys	The list of SSH public keys used to authenticate with linux based VMs.	SshPublicKey[]

SshPublicKey

Name	Description	Value
keyData	SSH public key certificate used to authenticate with the VM through ssh. The key needs to be at least 2048-bit and in ssh-rsa format. For creating ssh keys, see [Create SSH keys on Linux and Mac for Linux VMs in Azure]/azure/virtual-machines/linux/create-ssh-keys-detailed).	string
path	Specifies the full path on the created VM where ssh public key is stored. If the file already exists, the specified key is appended to the file. Example: /home/user/.ssh/authorized_keys	string

VaultSecretGroup

Name	Description	Value
sourceVault	The relative URL of the Key Vault containing all of the certificates in VaultCertificates.	SubResource
vaultCertificates	The list of key vault references in SourceVault which contain certificates.	VaultCertificate[]

VaultCertificate

Name	Description	Value
certificateStore	For Windows VMs, specifies the certificate store on the Virtual Machine to which the certificate should be added. The specified certificate store is implicitly in the LocalMachine account. For Linux VMs, the certificate file is placed under the /var/lib/waagent directory, with the file name <UppercaseThumbprint>.crt for the X509 certificate file and <UppercaseThumbprint>.prv for private key. Both of these files are .pem formatted.	string
certificateUrl	This is the URL of a certificate that has been uploaded to Key Vault as a secret. For adding a secret to the Key Vault, see Add a key or secret to the key vault. In this case, your certificate needs to be It is the Base64 encoding of the following JSON Object which is encoded in UTF-8: { "data":"{Base64-encoded-certificate}", "dataType":"pfx", "password":"{pfx-file-password}" } To install certificates on a virtual machine it is recommended to use the Azure Key Vault virtual machine extension for Linux or the Azure Key Vault virtual machine extension for Windows.	string

WindowsConfiguration

Name	Description	Value
additionalUnattendContent	Specifies additional base-64 encoded XML formatted information that can be included in the Unattend.xml file, which is used by Windows Setup.	AdditionalUnattendContent[]
enableAutomaticUpdates	Indicates whether Automatic Updates is enabled for the Windows virtual machine. Default value is true. For virtual machine scale sets, this property can be updated and updates will take effect on OS reprovisioning.	bool
patchSettings	[Preview Feature] Specifies settings related to VM Guest Patching on Windows.	PatchSettings
provisionVMAgent	Indicates whether virtual machine agent should be provisioned on the virtual machine. When this property is not specified in the request body, default behavior is to set it to true. This will ensure that VM Agent is installed on the VM so that extensions can be added to the VM later.	bool
timeZone	Specifies the time zone of the virtual machine. e.g. "Pacific Standard Time". Possible values can be TimeZoneInfo.Id value from time zones returned by TimeZoneInfo.GetSystemTimeZones.	string
winRM	Specifies the Windows Remote Management listeners. This enables remote Windows PowerShell.	WinRMConfiguration

AdditionalUnattendContent

Name	Description	Value
componentName	The component name. Currently, the only allowable value is Microsoft-Windows-Shell-Setup.	"Microsoft-Windows-Shell-Setup"
content	Specifies the XML formatted content that is added to the unattend.xml file for the specified path and component. The XML must be less than 4KB and must include the root element for the setting or feature that is being inserted.	string
passName	The pass name. Currently, the only allowable value is OobeSystem.	"OobeSystem"
settingName	Specifies the name of the setting to which the content applies. Possible values are: FirstLogonCommands and AutoLogon.	"AutoLogon" "FirstLogonCommands"

PatchSettings

Name	Description	Value
assessmentMode	Specifies the mode of VM Guest patch assessment for the IaaS virtual machine. Possible values are: ImageDefault - You control the timing of patch assessments on a virtual machine. AutomaticByPlatform - The platform will trigger periodic patch assessments. The property provisionVMAgent must be true.	"AutomaticByPlatform" "ImageDefault"
enableHotpatching	Enables customers to patch their Azure VMs without requiring a reboot. For enableHotpatching, the 'provisionVMAgent' must be set to true and 'patchMode' must be set to 'AutomaticByPlatform'.	bool
patchMode	Specifies the mode of VM Guest Patching to IaaS virtual machine or virtual machines associated to virtual machine scale set with OrchestrationMode as Flexible. Possible values are: Manual - You control the application of patches to a virtual machine. You do this by applying patches manually inside the VM. In this mode, automatic updates are disabled; the property WindowsConfiguration.enableAutomaticUpdates must be false AutomaticByOS - The virtual machine will automatically be updated by the OS. The property WindowsConfiguration.enableAutomaticUpdates must be true. AutomaticByPlatform - the virtual machine will automatically updated by the platform. The properties provisionVMAgent and WindowsConfiguration.enableAutomaticUpdates must be true	"AutomaticByOS" "AutomaticByPlatform" "Manual"

WinRMConfiguration

Name	Description	Value
listeners	The list of Windows Remote Management listeners	WinRMListener[]

WinRMListener

Name	Description	Value
certificateUrl	This is the URL of a certificate that has been uploaded to Key Vault as a secret. For adding a secret to the Key Vault, see Add a key or secret to the key vault. In this case, your certificate needs to be It is the Base64 encoding of the following JSON Object which is encoded in UTF-8: { "data":"{Base64-encoded-certificate}", "dataType":"pfx", "password":"{pfx-file-password}" } To install certificates on a virtual machine it is recommended to use the Azure Key Vault virtual machine extension for Linux or the Azure Key Vault virtual machine extension for Windows.	string
protocol	Specifies the protocol of WinRM listener. Possible values are: http https	"Http" "Https"

ScheduledEventsProfile

Name	Description	Value
terminateNotificationProfile	Specifies Terminate Scheduled Event related configurations.	TerminateNotificationProfile

TerminateNotificationProfile

Name	Description	Value
enable	Specifies whether the Terminate Scheduled event is enabled or disabled.	bool
notBeforeTimeout	Configurable length of time a Virtual Machine being deleted will have to potentially approve the Terminate Scheduled Event before the event is auto approved (timed out). The configuration must be specified in ISO 8601 format, the default value is 5 minutes (PT5M)	string

SecurityProfile

Name	Description	Value
encryptionAtHost	This property can be used by user in the request to enable or disable the Host Encryption for the virtual machine or virtual machine scale set. This will enable the encryption for all the disks including Resource/Temp disk at host itself. Default: The Encryption at host will be disabled unless this property is set to true for the resource.	bool
securityType	Specifies the SecurityType of the virtual machine. It is set as TrustedLaunch to enable UefiSettings. Default: UefiSettings will not be enabled unless this property is set as TrustedLaunch.	"TrustedLaunch"
uefiSettings	Specifies the security settings like secure boot and vTPM used while creating the virtual machine. Minimum api-version: 2020-12-01	UefiSettings

UefiSettings

Name	Description	Value
secureBootEnabled	Specifies whether secure boot should be enabled on the virtual machine. Minimum api-version: 2020-12-01	bool
vTpmEnabled	Specifies whether vTPM should be enabled on the virtual machine. Minimum api-version: 2020-12-01	bool

VirtualMachineScaleSetStorageProfile

Name	Description	Value
dataDisks	Specifies the parameters that are used to add data disks to the virtual machines in the scale set. For more information about disks, see About disks and VHDs for Azure virtual machines.	VirtualMachineScaleSetDataDisk[]
imageReference	Specifies information about the image to use. You can specify information about platform images, marketplace images, or virtual machine images. This element is required when you want to use a platform image, marketplace image, or virtual machine image, but is not used in other creation operations.	ImageReference
osDisk	Specifies information about the operating system disk used by the virtual machines in the scale set. For more information about disks, see About disks and VHDs for Azure virtual machines.	VirtualMachineScaleSetOSDisk

VirtualMachineScaleSetDataDisk

Name	Description	Value
caching	Specifies the caching requirements. Possible values are: None ReadOnly ReadWrite Default: None for Standard storage. ReadOnly for Premium storage	"None" "ReadOnly" "ReadWrite"
createOption	The create option.	"Attach" "Empty" "FromImage" (required)
diskIOPSReadWrite	Specifies the Read-Write IOPS for the managed disk. Should be used only when StorageAccountType is UltraSSD_LRS. If not specified, a default value would be assigned based on diskSizeGB.	int
diskMBpsReadWrite	Specifies the bandwidth in MB per second for the managed disk. Should be used only when StorageAccountType is UltraSSD_LRS. If not specified, a default value would be assigned based on diskSizeGB.	int
diskSizeGB	Specifies the size of an empty data disk in gigabytes. This element can be used to overwrite the size of the disk in a virtual machine image. This value cannot be larger than 1023 GB	int
lun	Specifies the logical unit number of the data disk. This value is used to identify data disks within the VM and therefore must be unique for each data disk attached to a VM.	int (required)
managedDisk	The managed disk parameters.	VirtualMachineScaleSetManagedDiskParameters
name	The disk name.	string
writeAcceleratorEnabled	Specifies whether writeAccelerator should be enabled or disabled on the disk.	bool

VirtualMachineScaleSetManagedDiskParameters

Name	Description	Value
diskEncryptionSet	Specifies the customer managed disk encryption set resource id for the managed disk.	DiskEncryptionSetParameters
storageAccountType	Specifies the storage account type for the managed disk. NOTE: UltraSSD_LRS can only be used with data disks, it cannot be used with OS Disk.	"Premium_LRS" "Premium_ZRS" "StandardSSD_LRS" "StandardSSD_ZRS" "Standard_LRS" "UltraSSD_LRS"

DiskEncryptionSetParameters

Name	Description	Value
id	Resource Id	string

ImageReference

Name	Description	Value
id	Resource Id	string
offer	Specifies the offer of the platform image or marketplace image used to create the virtual machine.	string
publisher	The image publisher.	string
sharedGalleryImageId	Specified the shared gallery image unique id for vm deployment. This can be fetched from shared gallery image GET call.	string
sku	The image SKU.	string
version	Specifies the version of the platform image or marketplace image used to create the virtual machine. The allowed formats are Major.Minor.Build or 'latest'. Major, Minor, and Build are decimal numbers. Specify 'latest' to use the latest version of an image available at deploy time. Even if you use 'latest', the VM image will not automatically update after deploy time even if a new version becomes available.	string

VirtualMachineScaleSetOSDisk

Name	Description	Value
caching	Specifies the caching requirements. Possible values are: None ReadOnly ReadWrite Default: None for Standard storage. ReadOnly for Premium storage	"None" "ReadOnly" "ReadWrite"
createOption	Specifies how the virtual machines in the scale set should be created. The only allowed value is: FromImage \u2013 This value is used when you are using an image to create the virtual machine. If you are using a platform image, you also use the imageReference element described above. If you are using a marketplace image, you also use the plan element previously described.	"Attach" "Empty" "FromImage" (required)
diffDiskSettings	Specifies the ephemeral disk Settings for the operating system disk used by the virtual machine scale set.	DiffDiskSettings
diskSizeGB	Specifies the size of the operating system disk in gigabytes. This element can be used to overwrite the size of the disk in a virtual machine image. This value cannot be larger than 1023 GB	int
image	Specifies information about the unmanaged user image to base the scale set on.	VirtualHardDisk
managedDisk	The managed disk parameters.	VirtualMachineScaleSetManagedDiskParameters
name	The disk name.	string
osType	This property allows you to specify the type of the OS that is included in the disk if creating a VM from user-image or a specialized VHD. Possible values are: Windows Linux	"Linux" "Windows"
vhdContainers	Specifies the container urls that are used to store operating system disks for the scale set.	string[]
writeAcceleratorEnabled	Specifies whether writeAccelerator should be enabled or disabled on the disk.	bool

DiffDiskSettings

Name	Description	Value
option	Specifies the ephemeral disk settings for operating system disk.	"Local"
placement	Specifies the ephemeral disk placement for operating system disk. Possible values are: CacheDisk ResourceDisk Default: CacheDisk if one is configured for the VM size otherwise ResourceDisk is used. Refer to VM size documentation for Windows VM at /azure/virtual-machines/windows/sizes and Linux VM at /azure/virtual-machines/linux/sizes to check which VM sizes exposes a cache disk.	"CacheDisk" "ResourceDisk"

VirtualHardDisk

Name	Description	Value
uri	Specifies the virtual hard disk's uri.	string

Sku

Name	Description	Value
capacity	Specifies the number of virtual machines in the scale set.	int
name	The sku name.	string
tier	Specifies the tier of virtual machines in a scale set. Possible Values: Standard Basic	string