In a previous post we went through deploying resource using ARM templates. I have been recently working on creating some new templates to be used for additional deployment and decided to use Bicep templates instead as it seem to an easier and more straight forward way of writing template files to deploy resources in Azure.
Bicep uses a simpler syntax than creating templates using JSON, the syntax is declarative and specifies which resources and resource properties you want to deploy.
Below is a comparison of a JSON and Bicep template file to create a storage account.
We can see that the bicep file is an easier format to read and create.
To get started with Bicep we will first be installing the Bicep extension to Visual Studio Code so we can edit and modify Bicep templates.
The extension adds intellisense which makes it easier than looking up the full syntax for each resource.
To create a new template click on new file in VS code and select bicep as the language.
To create a template using intellisense either start typing the res-resource type or the resource type itself.
Click on the resource to pre populate the template.
The values can be hard code in the template file but this would require manual change each time the template is run.
We can add parameters to the template to make it more reusable. There are a few different types of parameters that can be used.
Below is a brief description of each type.
|string||Single line value|
|array||Allow multiple values|
|bool||Required true or false|
|objects||Allows property types|
Microsoft have a more in depth document on the different data types.
The below is an example of a template with parameters set.
Once we have the template we need to install Azure PowerShell if not already installed and to install the Bicep tools, below is the document to install.
To connect to Azure PowerShell use
Once connected we can use the New-AzResourceGroupDeployment to deploy the template and specify the parameters values. To test the deployment for errors without running an actual deployment we can use the -whatif parameter.
New-AzResourceGroupDeployment -ResourceGroupName ResourceGroup -TemplateFile pathtotempaltefile\BicepStorageTest.bicep -location regsion -storagename storageaccountname -storagetype Standard_LRS -WhatIf
Run the command and it should return any error if there is an issue or green if there is no issue.
Once the template comes back with no issues we can remove the -whatif and the storage account will be created.
To confirm the storage account has been created use the Get-AzStorageAccount
Using parameters in the Bicep template is fine when there are only a few that need to be called but for more complex deployment it will be better to use a parameters file and pre fill each value.
In the next post we will go through the process of using a template to create a VM and its network interface and will call a parameters files instead of call the parameters in PowerShell directly.
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