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Automated GitOps Promotion

Company: CapitalOne | Difficulty: Medium

Scenario

You are setting up a GitOps pipeline. repo-a contains the application source code, and repo-b contains the Kubernetes configuration (values.yaml).

When code is pushed to repo-a, the pipeline must:

  1. Build a Docker image tagged with the Short Git SHA.
  2. Automatically update repo-b to use this new image tag.

Task

Edit the existing workflow file at /home/interview/repo-a/.github/workflows/promote.yml to complete the pipeline.

  1. Calculate SHA: Finish the step to extract the first 7 characters of $GITHUB_SHA into an environment variable named SHORT_SHA.
  2. Build: Build a Docker image named app tagged with ${{ env.SHORT_SHA }}.
  3. Checkout Infrastructure: Configure the checkout step to clone interview/repo-b into a directory named infra.
  4. Promote: Inside the infra directory:
    • Update values.yaml so that the tag key reflects the new SHORT_SHA.
    • Commit the change with the message: Update tag to <SHORT_SHA>.