destroy_environment__kubernetes.yml

name: Destroy Environment - Kubernetes

on:
  deployment_status

env:
  GCP_SDK_VERSION: 312.0.0

jobs:
  destroy:
    name: Terraform Destroy
    if: github.event.deployment_status.state == 'failure'
    runs-on: ubuntu-20.04

    timeout-minutes: 5

    # Set common Terraform execution environment variables
    env:
      TF_VAR_ENVIRONMENT: ${{ github.event.deployment.environment }}

      # These are required as we currently do not default them
      TF_VAR_app_container: placeholder
      TF_VAR_app_container_version: placeholder
      TF_VAR_database_container: placeholder
      TF_VAR_database_container_version: placeholder

      KUBE_SYSTEM: gke

      GKE_CLUSTER: ${{ secrets.GKE_CLUSTER_NAME }}
      GKE_ZONE: ${{ secrets.GKE_CLUSTER_LOCATION }}

      # Directory that contains Terraform HCL to run
      TERRAFORM_WORKING_DIRECTORY: ./terraform/kubernetes

    steps:
      - name: Checkout Sources
        uses: actions/checkout@v2

      - name: HashiCorp - Setup Terraform
        uses: hashicorp/setup-terraform@v1.2.1
        with:
          terraform_version: 0.13.5
          terraform_wrapper: true

      - name: Setup Terragrunt
        uses: peter-murray/terragrunt-github-action@v1.0.0
        with:
          terragrunt_version: 0.25.2

      - name: Sign in to Google Cloud Platform
        uses: google-github-actions/setup-gcloud@master
        with:
          version: ${{ env.GCP_SDK_VERSION }}
          project_id: ${{ secrets.GCP_PROJECT_ID }}
          service_account_key: ${{ secrets.GCP_TERRAFORM_SERVICE_ACCOUNT_KEY }}
          export_default_credentials: true

      - name: Authenticate with Kubernetes Cluster
        run: |
          gcloud container clusters get-credentials "$GKE_CLUSTER" --zone "$GKE_ZONE"

      - name: Terraform - init
        working-directory: ${{ env.TERRAFORM_WORKING_DIRECTORY }}
        run: terragrunt init

      - name: Terraform - destroy
        working-directory: ${{ env.TERRAFORM_WORKING_DIRECTORY }}
        run: terragrunt destroy -auto-approve

      - name: Remove Environment
        if: success()
        uses: actions/github-script@v2
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            console.log(`Removing Deployment after Terraform destroy: ${context.payload.deployment.id}:${context.payload.deployment.environment}`);

            await github.repos.deleteDeployment({
              ...context.repo,
              deployment_id: context.payload.deployment.id
            });