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Azure Resource Manager (ARM) Tools for Visual Studio Code (Preview)

Version Installs Build Status

The Azure Resource Manager (ARM) Tools for Visual Studio Code provides language support, resource snippets, and resource auto-completion to help you create and validate Azure Resource Manager templates.

Getting Started

The following guides detail how to use the ARM Tools extension features.

Snippets

Snippets are used to create basic templates and add elements such as parameters, resources, and outputs to existing templates.

Create a new ARM template

When in an empty JSON file, typing arm produces a list of scaffolding snippets. These snippets can be used to create an empty template for any ARM deployment scope (Tenant, Subscription, Management Group, and Resource Group).

Image showing the arm template scaffolding snippet

Notice that adding scaffolding for an ARM template changes the Visual Studio Code language mode to Azure Resource Manager Template.

Image showing that the language type has changed to Azure Resource Manager Template

Add Azure resource to an ARM template

Once you are working in an ARM template, placing your cursor in the resource and typing arm, CTRL + Space, or { produces a list of 70+ snippets for Azure resources. Selecting a snippet adds an instance of the resource type to the ARM template.

Image showing a storage account being added with a snippet

Each snippet includes tab stops to help navigate through commonly modified configurations. Press the tab key to navigate to the next stop, and shift + tab to navigate to the previous stop. As seen in the following example, some stops are pre-populated with a list of common values for quick selection.

Image showing snippet tab stops with pre-populated parameter values

Snippet Reference

The following table lists the available ARM Tools snippets.

Snippet Description
arm! Adds the framework for a full deployment template file for resource group deployments.
arm!s Adds the framework for a full deployment template file for subscription deployments.
arm!mg Adds the framework for a full deployment template file for management group deployments.
arm!t Adds the framework for a full deployment template file for tenant deployments.
armp! Adds the framework for a full deployment template parameters file.
"" While in the parameters section adds a parameter to the template.
"" While in the variables section adds a variable to the template.
{} While in the functions section add a new user-defined function.
arm- or the resource name Displays 70+ snippets for creating Azure resources. For example, type arm-ubuntu to add all five resources necessary for a basic Ubuntu virtual machine.
"" While in the outputs section adds an output to the template.

Azure schema completion and validation

The ARM Tools extension uses Azure schemas to provide resource completion and validation. These schemas help you verify that Azure resources are configured correctly before deployment time.

Schema Completions

Entering double quotes "" or selecting ctrl + space while the cursor is in a resource declaration provides potential properties and property values for each Azure resource.

In the following example, the potential values for an Azure Storage account tier are returned from the Azure Storage schema.

Image showing a list of storage account tier values returned from the storage Azure schema

Schema Validation

If an invalid property or property value is specified, a validation warning is shown. In the following example, an invalid value has been provided for the storage account tier (line 19). Notice that the warning message includes a list of valid values.

Image showing a schema validation error

Parameter files

Associating a parameter file with an ARM template enables full validation across both the parameter file and template. A parameter file association can be made by either creating a new parameter file from an existing template or by associating an existing parameter file to the template.

Create a new parameter file

To create a new parameter file from an existing template, click on the code lens text `Select or create a parameter file to enable full validation...

Image showing the code lens for creating a parameter file association

Select New from the context menu.

Image showing the parameter file creation options (none, new, and browse)

Selecting All parameters adds every parameter from the template into the new parameter file. Selecting Only required parameters adds only parameters that do not have a default value specified in the template file.

Image showing options for adding parameters for parameter file (All parameters, only required parameters)

Select a name and location for the parameter file.

Image showing a file save as dialog box

Once done, a parameter file has been created. Where needed, remove the TODO comment and add a parameter value.

Image showing new parameter file

Also, notice that on the template file that the code lens text has been updated to reflect the current parameter file association. This association is also shown on the Visual Studio Code staus bar.

Image showing that the parameter code lens has been updated to reflect associated parameter file

Associate an existing parameter file

To create an association with an existing parameter file, click on the code lens text `Select or create a parameter file to enable full validation'.

Image showing the code lens for creating a parameter file association

If a parameter file with a matching name (template name + ".parameter") is found, it can be selected from the list. If a matching file is not found, select Browse from the list and then select the parameter file.

Image showing the parameter file creation options (none, new, and browse)

Parameter validation

Once a parameter file has been associated with a template, the extension provides parameter validation across both files. In the following example, a parameter is specified with a set of allowed values. In the parameter file, a value is specified that is not part of the allowed values list. Because of this, the extension produces an error.

Image showing a parameter validation issue

Add missing parameters

To add missing parameters to an existing parameter file, ensure that an association has been created, click somewhere inside "parameters", and then click the light bulb icon.

Image showing the light bulb helper for adding missing parameters

Select the option to add only required or all missing parameters.

Image showing missing parameter options (Add missing required parameters, Add all missing parameters)

Enter a value for the added parameters and also remove the 'TODO' comment.

Image showing parameter file after missing parameters have been added

Rename a parameter

Right-click on the parameter name and select Rename Symbol. This action renames the parameter and all template and parameter file references to the parameter.

Image showing the rename parameter dialoug

Remove or update parameter file association

Click on the code lens option for changing a parameter association.

Image showing the code lens for creating a parameter file association

Select a new parameter file or create a new parameter file to update the association. Select None to remove the parameter file association.

Image showing the parameter file creation options (none, new, and browse)

Template navigation

The ARM tools extension for VS Code offers several features for navigating around an ARM template.

ARM template outline

The ARM template outline is used to navigate to and select any element of an ARM template.

Image showing the ARM template outline with a storage account resource selected

In addition to navigation, several features such as insert item and template sorting can be engaged using the buttons found on the ARM template outline.

Go to Definition

Go to definition can be used to navigate to parameter, variable and user-defined function definitions. To use go to definition, place your cursor on the parameter, variable or function name and press F12 or right-click and select Go to Definition.

Image showing the Go to Definition dialog on a parameter reference

Find all references

Right-click on a parameter, variable, or user-defined function name and select Go to References. Double-clicking on any reference moves your cursor to the reference location.

Image showing the go to reference user interface

Completions

The ARM Tools extension provides code completions for many built-in functions, for example resourceId and variables, as well as for entries inside a dependsOn list and parameter values in a parameter file.

Other features

Insert Item

In addition to adding snippets from the code editor, the Insert Item feature can be used to insert new parameters, user-defined functions, variables, resources, and outputs. To do so right-click the code editor, select Insert Item and follow the on-screen prompts.

Inserting an item into an Azure Resource Manager template

You can also right-click on any element in the ARM Template Outline view to initiate the insert item process.

Inserting an item into an Azure Resource Manager template

Sort template

To sort elements of an ARM template alphabetically, right-click on the template and select Sort Template....

Image showing the sort template options (Resource, Function, Output, Parameter, Variable)

Select the element that you want to sort.

Image showing the insert resource menu

Template sorting can also be engaged using the ARM template outline.

Miscellaneous Features

  • Signature help for TLE function parameters
  • Peek for variable and parameter definitions
  • Find all references (Shift + F12) for variables and parameters
  • Rename (F2) variables and parameters and their references, as well as user-defined functions or namespaces
  • Hover for parameter description
  • TLE brace matching
  • User-defined template functions, see Azure documentation
  • Variable iteration ("copy blocks"), see Azure documentation
  • Sort template and template sections alphabetically
  • Nested templates (with inner or outer scope)
  • Quick fix to add missing parameter values in the parameter file or in nested templates

Extension configuration

You may be interested in adjusting the following extension configurations. These can be configured in VS Code User Settings.

Configuration Description
azureResourceManagerTools.autoDetectJsonTemplates Auto-detects ARM template and sets editor language type to Azure Resource Manager Template.
azureResourceManagerTools.checkForLatestSchema Check if the root schema for deployment templates is using an out-of-date version and suggest updating it to the latest version.
azureResourceManagerTools.checkForMatchingParameterFiles Check if an opened template file has a matching parameter file and prompt to create an association.
azureResourceManagerTools.codelens.enable Set to false to disable all code lens functionality.
azureResourceManagerTools.codelens.parameters Set to false to disable code lens for parameters.

Automatic Detection of deployment template files

By default, the extension recognizes a .json or .jsonc file as a deployment template file based on the $schema specified in the file (for instance, https://schema.management.azure.com/schemas/2018-05-01/deploymentTemplate.json#) and will switch the editor language to "Azure Resource Manager Template" automatically. If you do not want that behavior, you can set the azureResourceManagerTools.autoDetectJsonTemplates setting to false and use the below methods to determine which files to treat as deployment templates.

Besides automatic detection, you can also use the files.associations setting to set up your own specific associations based on specific files paths or patterns to mark them as deployment templates, e.g.

"files.associations": {
    "*.azrm.json": "arm-template" // Treat these files as deployment templates
}

Troubleshooting

Use the following wiki article to help troubleshoot these known issues.

Related Links

Contributing

There are several ways you can contribute to our repo:

  • Ideas, feature requests, and bugs: We are open to all ideas and we want to get rid of bugs! Use the Issues section to report a new issue, provide your ideas or contribute to existing threads.
  • Documentation: Found a typo or strangely worded sentences? Submit a PR!
  • Snippets: Have a fix for a snippet or a new snippet idea? File an Issue or submit a PR!
  • Code: Contribute bug fixes, features or design changes:
    • Clone the repository locally and open in VS Code.
    • Install TSLint for Visual Studio Code.
    • Open the terminal (press CTRL+`) and run npm install.
    • To build, press F1 and type in Tasks: Run Build Task.
    • Debug: press F5 to start debugging the extension.

Legal

Before we can accept your pull request you will need to sign a Contribution License Agreement. All you need to do is to submit a pull request, then the PR will get appropriately labeled (e.g. cla-required, cla-norequired, cla-signed, cla-already-signed). If you already signed the agreement we will continue with reviewing the PR, otherwise, the system will tell you how you can sign the CLA. Once you sign the CLA all future PR's will be labeled as cla-signed.

Code of Conduct

This project has adopted the Microsoft Open Source Code of Conduct. For more information see the Code of Conduct FAQ or contact opencode@microsoft.com with any additional questions or comments.

Telemetry

VS Code collects usage data and sends it to Microsoft to help improve our products and services. Read our privacy statement to learn more. If you don’t wish to send usage data to Microsoft, you can set the telemetry.enableTelemetry setting to false. Learn more in our FAQ.

License

The source code in our public repository is licensed under the MIT license and may be locally built and used in accordance with this license.

When the extension is published to the VS Code Marketplace, it is bundled with the Azure Resource Manager language service binaries. The extension as bundled and published this way is licensed under a traditional Microsoft product license.

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