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Scope functions for ARM templates

  • Artikkeli

Resource Manager provides the following functions for getting deployment scope values in your Azure Resource Manager template (ARM template):

To get values from parameters, variables, or the current deployment, see Deployment value functions.

Tip

We recommend Bicep because it offers the same capabilities as ARM templates and the syntax is easier to use. To learn more, see scope functions.

managementGroup

managementGroup()

Returns an object with properties from the management group in the current deployment.

In Bicep, use the managementGroup scope function.

Remarks

managementGroup() can only be used on a management group deployments. It returns the current management group for the deployment operation. Use to get properties for the current management group.

Return value

An object with the properties for the current management group.

Management group example

The following example returns properties for the current management group.

{
  "$schema": "https://schema.management.azure.com/schemas/2019-08-01/managementGroupDeploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "variables": {
    "mgInfo": "[managementGroup()]"
  },
  "resources": [],
  "outputs": {
    "mgResult": {
      "type": "object",
      "value": "[variables('mgInfo')]"
    }
  }
}

It returns:

"mgResult": {
  "type": "Object",
  "value": {
    "id": "/providers/Microsoft.Management/managementGroups/examplemg1",
    "name": "examplemg1",
    "properties": {
      "details": {
        "parent": {
          "displayName": "Tenant Root Group",
          "id": "/providers/Microsoft.Management/managementGroups/00000000-0000-0000-0000-000000000000",
          "name": "00000000-0000-0000-0000-000000000000"
        },
        "updatedBy": "00000000-0000-0000-0000-000000000000",
        "updatedTime": "2020-07-23T21:05:52.661306Z",
        "version": "1"
      },
      "displayName": "Example MG 1",
      "tenantId": "aaaabbbb-0000-cccc-1111-dddd2222eeee"
    },
    "type": "/providers/Microsoft.Management/managementGroups"
  }
}

The next example creates a new management group and uses this function to set the parent management group.

{
  "$schema": "https://schema.management.azure.com/schemas/2019-08-01/managementGroupDeploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "mgName": {
      "type": "string",
      "defaultValue": "[format('mg-{0}', uniqueString(newGuid()))]"
    }
  },
  "resources": [
    {
      "type": "Microsoft.Management/managementGroups",
      "apiVersion": "2020-05-01",
      "scope": "/",
      "name": "[parameters('mgName')]",
      "properties": {
        "details": {
          "parent": {
            "id": "[managementGroup().id]"
          }
        }
      }
    }
  ],
  "outputs": {
    "newManagementGroup": {
      "type": "string",
      "value": "[parameters('mgName')]"
    }
  }
}

resourceGroup

resourceGroup()

Returns an object that represents the current resource group.

In Bicep, use the resourceGroup scope function.

Return value

The returned object is in the following format:

{
  "id": "/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}",
  "name": "{resourceGroupName}",
  "type":"Microsoft.Resources/resourceGroups",
  "location": "{resourceGroupLocation}",
  "managedBy": "{identifier-of-managing-resource}",
  "tags": {
  },
  "properties": {
    "provisioningState": "{status}"
  }
}

The managedBy property is returned only for resource groups that contain resources that are managed by another service. For Managed Applications, Databricks, and AKS, the value of the property is the resource ID of the managing resource.

Remarks

The resourceGroup() function can't be used in a template that is deployed at the subscription level. It can only be used in templates that are deployed to a resource group. You can use the resourceGroup() function in a linked or nested template (with inner scope) that targets a resource group, even when the parent template is deployed to the subscription. In that scenario, the linked or nested template is deployed at the resource group level. For more information about targeting a resource group in a subscription level deployment, see Deploy Azure resources to more than one subscription or resource group.

A common use of the resourceGroup function is to create resources in the same location as the resource group. The following example uses the resource group location for a default parameter value.

"parameters": {
  "location": {
    "type": "string",
    "defaultValue": "[resourceGroup().location]"
  }
}

You can also use the resourceGroup function to apply tags from the resource group to a resource. For more information, see Apply tags from resource group.

When using nested templates to deploy to multiple resource groups, you can specify the scope for evaluating the resourceGroup function. For more information, see Deploy Azure resources to more than one subscription or resource group.

Resource group example

The following example returns the properties of the resource group.

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "resources": [],
  "outputs": {
    "resourceGroupOutput": {
      "type": "object",
      "value": "[resourceGroup()]"
    }
  }
}

The preceding example returns an object in the following format:

{
  "id": "/subscriptions/{subscription-id}/resourceGroups/examplegroup",
  "name": "examplegroup",
  "type":"Microsoft.Resources/resourceGroups",
  "location": "southcentralus",
  "properties": {
    "provisioningState": "Succeeded"
  }
}

subscription

subscription()

Returns details about the subscription for the current deployment.

In Bicep, use the subscription scope function.

Return value

The function returns the following format:

{
  "id": "/subscriptions/{subscription-id}",
  "subscriptionId": "{subscription-id}",
  "tenantId": "{tenant-id}",
  "displayName": "{name-of-subscription}"
}

Remarks

When using nested templates to deploy to multiple subscriptions, you can specify the scope for evaluating the subscription function. For more information, see Deploy Azure resources to more than one subscription or resource group.

Subscription example

The following example shows the subscription function called in the outputs section.

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "resources": [],
  "outputs": {
    "subscriptionOutput": {
      "type": "object",
      "value": "[subscription()]"
    }
  }
}

tenant

tenant()

Returns the tenant of the user.

In Bicep, use the tenant scope function.

Remarks

tenant() can be used with any deployment scope. It always returns the current tenant. Use this function to get properties for the current tenant.

When setting the scope for a linked template or extension resource, use the syntax: "scope": "/".

Return value

An object with properties about the current tenant.

Tenant example

The following example returns the properties for a tenant.

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "variables": {
    "tenantInfo": "[tenant()]"
  },
  "resources": [],
  "outputs": {
    "tenantResult": {
      "type": "object",
      "value": "[variables('tenantInfo')]"
    }
  }
}

It returns:

"tenantResult": {
  "type": "Object",
  "value": {
    "countryCode": "US",
    "displayName": "Contoso",
    "id": "/tenants/00000000-0000-0000-0000-000000000000",
    "tenantId": "aaaabbbb-0000-cccc-1111-dddd2222eeee"
  }
}

Next steps