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Manage Azure resources with Invoke-AzRestMethod

  • Artigo

Invoke-AzRestMethod is an Azure PowerShell cmdlet that was introduced in Az PowerShell module version 4.4.0. It allows you to make custom HTTP requests to the Azure Resource Manager (ARM) endpoint using the Az context.

This cmdlet is useful when you want to manage Azure services for features that aren't yet available in the Az PowerShell module.

How to use Invoke-AzRestMethod

As an example, you can allow access to Azure Container Registry (ACR) only for specific networks or deny public access. As of Az PowerShell module version 4.5.0, that feature isn't available yet in the Az.ContainerRegistry PowerShell module. However, it can be managed in the interim with Invoke-AzRestMethod.

Using Invoke-AzRestMethod with GET operations

The following example demonstrates how to use the Invoke-AzRestMethod cmdlet with a GET operation:

$getParams = @{
  ResourceGroupName = 'myresourcegroup'
  ResourceProviderName = 'Microsoft.ContainerRegistry'
  ResourceType = 'registries'
  Name = 'myacr'
  ApiVersion = '2019-12-01-preview'
  Method = 'GET'
}
Invoke-AzRestMethod @getParams

To allow maximum flexibility, most of the parameters for Invoke-AzRestMethod are optional. However, when you're managing resources within a resource group, you'll need to provide either the full ID to the resource or parameters like resource group, resource provider, and resource type.

The ResourceType and Name parameters can take multiple values when targeting resources that require more than one name. For example, to manipulate a saved search in a Log Analytics workspace, the parameters look like the following example: -ResourceType @('workspaces', 'savedsearches') -Name @('my-la', 'my-search').

Using a mapping based on the position in the array, the cmdlet constructs the following resource: Id:'/workspaces/my-la/savedsearches/my-search'.

The APIVersion parameter allows you to use a specific API version, including preview ones. The supported API versions for Azure Resource providers can be found in the azure-rest-api-specs GitHub repository.

You can find the definition for the 2019-12-01-preview ACR API version in the following location: azure-rest-api-specs/specification/containerregistry/resource-manager/Microsoft.ContainerRegistry/preview/.

Using Invoke-AzRestMethod with PATCH operations

You can disable public access to the existing ACR named myacr in the myresourcegroup resource group using the Invoke-AzRestMethod cmdlet.

To disable the public network access, you need to make a PATCH call to the API that changes the value of the publicNetwokAccess parameter as shown in the following example:

$patchParams = @{
  ResourceGroupName = 'myresourcegroup'
  Name = 'myacr'
  ResourceProviderName = 'Microsoft.ContainerRegistry'
  ResourceType = 'registries'
  ApiVersion = '2019-12-01-preview'
  Payload = '{ "properties": {
     "publicNetworkAccess": "Disabled"
     } }'
  Method = 'PATCH'
}
Invoke-AzRestMethod @patchParams

The Payload property is a JSON string that shows the path of the property to be modified.

All the parameters for this API are described in the rest-api-spec file associated with this API. The specific definition for the publicNetworkAccess parameter can be found in the container registry JSON file for the 2019-12-01-preview API version.

To only allow access to the registry from a specific IP address, the payload needs to be modified as shown in the following example:

$specificIpParams = @{
  ResourceGroupName = 'myresourcegroup'
  Name = 'myacr'
  ResourceProviderName = 'Microsoft.ContainerRegistry'
  ResourceType = 'registries'
  ApiVersion = '2019-12-01-preview'
  Payload = '{ "properties": {
      "networkRuleSet": {
      "defaultAction": "Deny",
      "ipRules": [ {
         "action": "Allow",
         "value": "24.22.123.123"
         } ]
      }
  } }'
  Method = 'PATCH'
}
Invoke-AzRestMethod @specificIpParams

Comparison to Get-AzResource, New-AzResource, and Remove-AzResource

The *-AzResource cmdlets allow you to customize the REST API call to Azure by specifying the resource type, the API version, and the properties to be updated. However, the properties need to be created first as a PSObject. This process adds an additional level of complexity and can become complicated.

Invoke-AzRestMethod offers a way to manage Azure resources. As shown in the previous example, you can build a JSON string and use it to customize the REST API call without having to pre-create any PSObjects.

If you're already familiar with the *-AzResource cmdlets, you can continue using them. We've no plans to stop supporting them. With Invoke-AzRestMethod, we've added a new cmdlet to your toolkit.

See Also