Quickstart: Create and deploy a template spec with Bicep

Article
10/09/2024

This quickstart describes how to create and deploy a template spec with a Bicep file. A template spec is deployed to a resource group so that people in your organization can deploy resources in Azure. Template specs let you share deployment templates without needing to give users access to change the Bicep file. This template spec example uses a Bicep file to deploy a storage account.

When you create a template spec, the Bicep file is transpiled into JavaScript Object Notation (JSON). The template spec uses JSON to deploy Azure resources. Currently, you can't use the Azure portal to import a Bicep file and create a template spec resource.

Prerequisites

An Azure account with an active subscription. Create a trial subscription.
Azure PowerShell version 6.3.0 or later or Azure CLI version 2.27.0 or later.
Visual Studio Code with the Bicep extension.

Create Bicep file

You create a template spec from a local Bicep file. Copy the following sample and save it to your computer as main.bicep. The examples use the path C:\templates\main.bicep. You can use a different path, but you'll need to change the commands.

The following Bicep file is used in the PowerShell and CLI tabs. The Bicep file tab uses a different template that combines Bicep and JSON to create and deploy a template spec.

@allowed([
  'Premium_LRS'
  'Standard_GRS'
  'Standard_LRS'
  'Standard_RAGRS'
])
@description('Storage account type.')
param storageAccountType string = 'Standard_LRS'

@description('Location for all resources.')
param location string = resourceGroup().location

var storageAccountName = 'storage${uniqueString(resourceGroup().id)}'

resource storageAccount 'Microsoft.Storage/storageAccounts@2023-04-01' = {
  name: storageAccountName
  location: location
  sku: {
    name: storageAccountType
  }
  kind: 'StorageV2'
  properties: {}
}

output storageAccountNameOutput string = storageAccount.name

Create template spec

The template spec is a resource type named Microsoft.Resources/templateSpecs . To create a template spec, use Azure CLI, Azure PowerShell, or a Bicep file.

This example uses the resource group name templateSpecRG. You can use a different name, but you need to change the commands.

Create a new resource group to contain the template spec.

New-AzResourceGroup `
  -Name templateSpecRG `
  -Location chinanorth2

Create the template spec in that resource group. Give the new template spec the name storageSpec.

New-AzTemplateSpec `
  -Name storageSpec `
  -Version "1.0" `
  -ResourceGroupName templateSpecRG `
  -Location chinanorth2 `
  -TemplateFile "C:\templates\main.bicep"

Create a new resource group to contain the template spec.

az group create \
  --name templateSpecRG \
  --location chinanorth2

Create the template spec in that resource group. Give the new template spec the name storageSpec.

az ts create \
  --name storageSpec \
  --version "1.0" \
  --resource-group templateSpecRG \
  --location chinanorth2 \
  --template-file "C:\templates\main.bicep"

You can create a template spec with a Bicep file but the mainTemplate must be in JSON. The JSON template doesn't use standard JSON syntax. For example, there are no end-of-line commas, double quotes are replaced with single quotes, and backslashes (\) are used to escape single quotes within expressions.

Copy the following template and save it to your computer as main.bicep.

param templateSpecName string = 'storageSpec'

param templateSpecVersionName string = '1.0'

@description('Location for all resources.')
param location string = resourceGroup().location

resource createTemplateSpec 'Microsoft.Resources/templateSpecs@2022-02-01' = {
  name: templateSpecName
  location: location
}

resource createTemplateSpecVersion 'Microsoft.Resources/templateSpecs/versions@2022-02-01' = {
  parent: createTemplateSpec
  name: templateSpecVersionName
  location: location
  properties: {
    mainTemplate: {
      '$schema': 'https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#'
      'contentVersion': '1.0.0.0'
      'metadata': {}
      'parameters': {
        'storageAccountType': {
          'type': 'string'
          'defaultValue': 'Standard_LRS'
          'metadata': {
            'description': 'Storage account type.'
          }
          'allowedValues': [
            'Premium_LRS'
            'Standard_GRS'
            'Standard_LRS'
            'Standard_RAGRS'
          ]
        }
        'location': {
          'type': 'string'
          'defaultValue': '[resourceGroup().location]'
          'metadata': {
            'description': 'Location for all resources.'
          }
        }
      }
      'variables': {
        'storageAccountName': '[format(\'{0}{1}\', \'storage\', uniqueString(resourceGroup().id))]'
      }
      'resources': [
        {
          'type': 'Microsoft.Storage/storageAccounts'
          'apiVersion': '2023-04-01'
          'name': '[variables(\'storageAccountName\')]'
          'location': '[parameters(\'location\')]'
          'sku': {
            'name': '[parameters(\'storageAccountType\')]'
          }
          'kind': 'StorageV2'
          'properties': {}
        }
      ]
      'outputs': {
        'storageAccountNameOutput': {
          'type': 'string'
          'value': '[variables(\'storageAccountName\')]'
        }
      }
    }
  }
}

Use Azure PowerShell or Azure CLI to create a new resource group.

New-AzResourceGroup `
  -Name templateSpecRG `
  -Location chinanorth2

az group create \
  --name templateSpecRG \
  --location chinanorth2

Create the template spec in that resource group. The template spec name storageSpec and version number 1.0 are parameters in the Bicep file.

New-AzResourceGroupDeployment `
  -ResourceGroupName templateSpecRG `
  -TemplateFile "C:\templates\main.bicep"

az deployment group create \
  --resource-group templateSpecRG \
  --template-file "C:\templates\main.bicep"

Deploy template spec

Use the template spec to deploy a storage account. This example uses the resource group name storageRG. You can use a different name, but you need to change the commands.

Create a resource group to contain the new storage account.

New-AzResourceGroup `
  -Name storageRG `
  -Location chinanorth2

Get the resource ID of the template spec.

$id = (Get-AzTemplateSpec -ResourceGroupName templateSpecRG -Name storageSpec -Version "1.0").Versions.Id

Deploy the template spec.

New-AzResourceGroupDeployment `
  -TemplateSpecId $id `
  -ResourceGroupName storageRG

You provide parameters exactly as you would for a Bicep file deployment. Redeploy the template spec with a parameter for the storage account type.
```
New-AzResourceGroupDeployment `
  -TemplateSpecId $id `
  -ResourceGroupName storageRG `
  -storageAccountType Standard_GRS
```

Create a resource group to contain the new storage account.

az group create \
  --name storageRG \
  --location chinanorth2

Get the resource ID of the template spec.
```
id=$(az ts show --name storageSpec --resource-group templateSpecRG --version "1.0" --query "id")
```
Note

There is a known issue with getting a template spec ID and assigning it to a variable in Windows PowerShell.

Deploy the template spec.

az deployment group create \
  --resource-group storageRG \
  --template-spec $id

You provide parameters exactly as you would for a Bicep file deployment. Redeploy the template spec with a parameter for the storage account type.
```
az deployment group create \
  --resource-group storageRG \
  --template-spec $id \
  --parameters storageAccountType="Standard_GRS"
```

To deploy a template spec using a Bicep file, use a module. The module links to an existing template spec. For more information, see file in template spec.

Copy the following Bicep module and save it to your computer as storage.bicep.

module deployTemplateSpec 'ts:<subscriptionId>/templateSpecRG/storageSpec:1.0' = {
  name: 'deployVersion1'
}

Replace <subscriptionId> in the module. Use Azure PowerShell or Azure CLI to get your subscription ID.
```
(Get-AzContext).Subscription.Id
```
```
az account show --query "id" --output tsv
```

Use Azure PowerShell or Azure CLI to create a new resource group for the storage account.

New-AzResourceGroup `
  -Name storageRG `
  -Location chinanorth2

az group create \
  --name storageRG \
  --location chinanorth2

Deploy the template spec with Azure PowerShell or Azure CLI.

New-AzResourceGroupDeployment `
  -ResourceGroupName storageRG `
  -TemplateFile "C:\templates\storage.bicep"

az deployment group create \
  --resource-group storageRG \
  --template-file "C:\templates\storage.bicep"

You can add a parameter and redeploy the template spec with a different storage account type. Copy the sample and replace your storage.bicep file. Then, redeploy the template spec deployment.
```
module deployTemplateSpec 'ts:<subscriptionId>/templateSpecRG/storageSpec:1.0' = {
  name: 'deployVersion1'
  params: {
    storageAccountType: 'Standard_GRS'
  }
}
```

Grant access

If you want to let other users in your organization deploy your template spec, you need to grant them read access. You can assign the Reader role to a Microsoft Entra group for the resource group that contains template specs you want to share. For more information, see Tutorial: Grant a group access to Azure resources using Azure PowerShell.

Update Bicep file

After the template spec was created, you decided to update the Bicep file. To continue with the examples in the PowerShell or CLI tabs, copy the sample and replace your main.bicep file.

The parameter storageNamePrefix specifies a prefix value for the storage account name. The storageAccountName variable concatenates the prefix with a unique string.

@allowed([
  'Premium_LRS'
  'Standard_GRS'
  'Standard_LRS'
  'Standard_RAGRS'
])
@description('Storage account type.')
param storageAccountType string = 'Standard_LRS'

@description('Location for all resources.')
param location string = resourceGroup().location

@maxLength(11)
@description('The storage account name prefix.')
param storageNamePrefix string = 'storage'

var storageAccountName = '${toLower(storageNamePrefix)}${uniqueString(resourceGroup().id)}'

resource storageAccount 'Microsoft.Storage/storageAccounts@2022-09-01' = {
  name: storageAccountName
  location: location
  sku: {
    name: storageAccountType
  }
  kind: 'StorageV2'
  properties: {}
}

output storageAccountNameOutput string = storageAccount.name

Update template spec version

Rather than create a new template spec for the revised template, add a new version named 2.0 to the existing template spec. Users can choose to deploy either version.

Create a new version of the template spec.

New-AzTemplateSpec `
  -Name storageSpec `
  -Version "2.0" `
  -ResourceGroupName templateSpecRG `
  -Location chinanorth2 `
  -TemplateFile "C:\templates\main.bicep"

To deploy the new version, get the resource ID for the 2.0 version.

$id = (Get-AzTemplateSpec -ResourceGroupName templateSpecRG -Name storageSpec -Version "2.0").Versions.Id

Deploy the new version and use the storageNamePrefix to specify a prefix for the storage account name.

New-AzResourceGroupDeployment `
  -TemplateSpecId $id `
  -ResourceGroupName storageRG `
  -storageNamePrefix "demo"

Create a new version of the template spec.

az ts create \
  --name storageSpec \
  --version "2.0" \
  --resource-group templateSpecRG \
  --location chinanorth2 \
  --template-file "C:\templates\main.bicep"

To deploy the new version, get the resource ID for the 2.0 version.

id=$(az ts show --name storageSpec --resource-group templateSpecRG --version "2.0" --query "id")

Deploy the new version and use the storageNamePrefix to specify a prefix for the storage account name.

az deployment group create \
   --resource-group storageRG \
   --template-spec $id \
   --parameters storageNamePrefix="demo"

Create a new version of the template spec. Copy the sample and replace your main.bicep file.

The parameter storageNamePrefix specifies a prefix value for the storage account name. The storageAccountName variable concatenates the prefix with a unique string.

param templateSpecName string = 'storageSpec'

param templateSpecVersionName string = '2.0'

@description('Location for all resources.')
param location string = resourceGroup().location

resource createTemplateSpec 'Microsoft.Resources/templateSpecs@2022-02-01' = {
  name: templateSpecName
  location: location
}

resource createTemplateSpecVersion 'Microsoft.Resources/templateSpecs/versions@2022-02-01' = {
  parent: createTemplateSpec
  name: templateSpecVersionName
  location: location
  properties: {
    mainTemplate: {
      '$schema': 'https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#'
      'contentVersion': '1.0.0.0'
      'metadata': {}
      'parameters': {
        'storageAccountType': {
          'type': 'string'
          'defaultValue': 'Standard_LRS'
          'metadata': {
            'description': 'Storage account type.'
          }
          'allowedValues': [
            'Premium_LRS'
            'Standard_GRS'
            'Standard_LRS'
            'Standard_RAGRS'
          ]
        }
        'location': {
          'type': 'string'
          'defaultValue': '[resourceGroup().location]'
          'metadata': {
            'description': 'Location for all resources.'
          }
        }
        'storageNamePrefix': {
          'type': 'string'
          'defaultValue': 'storage'
          'metadata': {
            'description': 'The storage account name prefix.'
          }
          'maxLength': 11
        }
      }
      'variables': {
        'storageAccountName': '[format(\'{0}{1}\', toLower(parameters(\'storageNamePrefix\')), uniqueString(resourceGroup().id))]'
      }
      'resources': [
        {
          'type': 'Microsoft.Storage/storageAccounts'
          'apiVersion': '2023-04-01'
          'name': '[variables(\'storageAccountName\')]'
          'location': '[parameters(\'location\')]'
          'sku': {
            'name': '[parameters(\'storageAccountType\')]'
          }
          'kind': 'StorageV2'
          'properties': {}
        }
      ]
      'outputs': {
        'storageAccountNameOutput': {
          'type': 'string'
          'value': '[variables(\'storageAccountName\')]'
        }
      }
    }
  }
}

To add the new version to your template spec, deploy your template with Azure PowerShell or Azure CLI.

New-AzResourceGroupDeployment `
  -ResourceGroupName templateSpecRG `
  -TemplateFile "C:\templates\main.bicep"

az deployment group create \
  --resource-group templateSpecRG \
  --template-file "C:\templates\main.bicep"

Copy the following Bicep module and save it to your computer as storage.bicep.

module deployTemplateSpec 'ts:<subscriptionId>/templateSpecRG/storageSpec:2.0' = {
  name: 'deployVersion2'
  params: {
    storageNamePrefix: 'demo'
  }
}

Replace <subscriptionId> in the module. Use Azure PowerShell or Azure CLI to get your subscription ID.
```
(Get-AzContext).Subscription.Id
```
```
az account show --query "id" --output tsv
```

Deploy the template spec with Azure PowerShell or Azure CLI.

New-AzResourceGroupDeployment `
  -ResourceGroupName storageRG `
  -TemplateFile "C:\templates\storage.bicep"

az deployment group create \
  --resource-group storageRG \
  --template-file "C:\templates\storage.bicep"

Clean up resources

To clean up the resources you deployed in this quickstart, delete both resource groups. The resource group, template specs, and storage accounts will be deleted.

Use Azure PowerShell or Azure CLI to delete the resource groups.

Remove-AzResourceGroup -Name "templateSpecRG"

Remove-AzResourceGroup -Name "storageRG"

az group delete --name templateSpecRG

az group delete --name storageRG

Next steps

Azure Resource Manager template specs in Bicep