Yor tag & trace

There are two options to detect drift. You can either add the integration with Terraform Cloud or tag your resources with Yor. These don't conflict with each other so you can add both.

An introduction to Yor

Yor is an open-source tool that automatically tags infrastructure as code (IaC) templates with attribution and ownership details, unique IDs that get carried across to cloud resources, and any other need-to-know information. It can run locally, as a pre-commit hook, or in a CI/CD pipeline.

For drift detection, the important tag is yor_trace. It’s a unique identifier that helps us trace from a cloud runtime configuration back to the IaC that provisioned it. To do that we need 3 elements:

  • Yor automated tagging (this page)
  • Integration with the VCS that stores the IaC (we’ll use GitHub in step 5.4 as an example)
  • Cloud integration (we’ll use AWS in step 6.3 as an example)

Let’s start with Yor!

Adding the Yor GitHub Action

If you are using a recent clone of TerraGoat, yor is already setup as a GitHub Action in terragoat/.github/workflows/checkov.yaml. You can skip this page if you have that in place.

If you followed the previous setup for the Bridgecrew GitHub Action, this will be very straightforward. If you’re in the home directory of your TerraGoat repository, select “Create new file”.

GitHub Create new file

Set the path to .github/workflows/yor.yml. Add the following code:

name: IaC tag and trace


    runs-on: ubuntu-latest
      - uses: actions/checkout@v2
        name: Checkout repo
          fetch-depth: 0
      - name: Run yor action
        uses: bridgecrewio/yor-action@main

This will run Yor to automatically tag your IaC resources every time you perform a push or pull request to your repo. The result will look something like this:

Yor tag example

Notice the yor_trace tag? That’s all we need to track drift!