Ephemeral Environments for Cloud Development

# .github/workflows/ephemeral-env.yml
on:
  pull_request:
    types: [opened, synchronize, closed]

jobs:
  deploy-preview:
    if: github.event.action != 'closed'
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - name: Create Ephemeral Environment
        run: |
          # Deploy to ephemeral namespace
          kubectl create ns pr-${{ github.event.number }}
          helm install app ./chart \
            -n pr-${{ github.event.number }} \
            --set image.tag=${{ github.sha }}
      - name: Post Preview URL
        uses: actions/github-script@v7
        with:
          script: |
            github.rest.issues.createComment({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: context.issue.number,
              body: 'Preview: https://pr-${{ github.event.number }}.preview.example.com'
            })

  cleanup:
    if: github.event.action == 'closed'
    runs-on: ubuntu-latest
    steps:
      - name: Destroy Environment
        run: |
          kubectl delete ns pr-${{ github.event.number }}

# .gitlab-ci.yml
deploy_review:
  stage: deploy
  script:
    - kubectl create ns review-$CI_MERGE_REQUEST_IID
    - helm install app ./chart
        -n review-$CI_MERGE_REQUEST_IID
        --set image.tag=$CI_COMMIT_SHA
  environment:
    name: review/$CI_MERGE_REQUEST_IID
    url: https://review-$CI_MERGE_REQUEST_IID.example.com
    on_stop: stop_review
    auto_stop_in: 1 week
  rules:
    - if: $CI_MERGE_REQUEST_IID

stop_review:
  stage: deploy
  script:
    - kubectl delete ns review-$CI_MERGE_REQUEST_IID
  environment:
    name: review/$CI_MERGE_REQUEST_IID
    action: stop
  rules:
    - if: $CI_MERGE_REQUEST_IID
      when: manual