Serverless Plugin: Propagate Stack Tags To CloudFront Distribution

What is it?

This is a plugin for the Serverless framework that will copy the tags from a service's CloudFormation stack to any CloudFront distributions contained in that stack.

The CloudFormation docs note that all stack-level tags will be automatically propagated to resources that CloudFormation supports. CloudFront distributions have support for tags via CloudFormation. Unfortunately, stack-level tags are not propagated to CloudFront distributions at this time (and it seems to have been this way for a while). Until the behavior changes, this plugin can be used to mimic the behavior of the automatic stack tag propagation that CloudFormation provides. This will be performed by adding the stack-level tags found in the CloudFormation template to the CloudFront distribution before the stack is deployed.

NOTE: Once CloudFormation supports propagating stack-level tags to CloudFront distribution, this plugin will be obsolete.

How do I use it?

There are two steps:

Install the Plugin as a Development Dependency

npm install --save-dev --save-exact @silvermine/serverless-plugin-cloudfront-distribution-tags

Telling Serverless to Use the Plugin

Simply add this plugin to the list of plugins in your serverless.yml file:

plugins:
   - '@silvermine/serverless-plugin-cloudfront-distribution-tags'

Since CloudFront distributions can take quite a while to deploy, you likely only want to have to CloudFormation update them when changes are actually made. Unfortunately, when the tags on a distribution change, CloudFormation will redeploy the distribution. If you have a tag with a value that changes even when the distribution may not have, e.g. CODE_VERSION, you might want to exclude this tag using the excludedTags configuration option.

custom:
   serverless-plugin-cloudfront-distribution-tags:
      excludedTags:
         - CODE_VERSION
         - ANOTHER_TAG_TO_BE_EXCLUDED

How do I contribute?

We genuinely appreciate external contributions. See our extensive documentation on how to contribute.

License

This software is released under the MIT license. See the license file for more details.