app6-gke.yml

name: Build and Deploy app6 to GKE

on:
  push:
    branches: 
      - master
    paths:
      - 'app6/**'
      - '.github/workflows/app6-gke.yml'

env:
  PROJECT_ID: ${{ secrets.GKE_PROJECT }}
  GKE_CLUSTER: dwk-cluster
  GKE_ZONE: europe-north1-b
  IMAGE: dwk-environments

jobs:
  setup-build-publish-deploy:
    name: Setup, Build, Publish, and Deploy
    runs-on: ubuntu-latest

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

    - name: Set up Cloud SDK
      uses: google-github-actions/setup-gcloud@master
      with:
        project_id: ${{ secrets.GKE_PROJECT }}
        service_account_key: ${{ secrets.GKE_SA_KEY }}
        export_default_credentials: true

    # Configure Docker to use the gcloud command-line tool as a credential
    # helper for authentication
    - run: |-
        gcloud --quiet auth configure-docker

    # Get the GKE credentials so we can deploy to the cluster
    - run: |-
        gcloud container clusters get-credentials "$GKE_CLUSTER" --zone "$GKE_ZONE"

    # Build the Docker image
    - name: Build
      run: |-
        cd ./app6/ && docker build \
          --tag "gcr.io/$PROJECT_ID/$IMAGE:${GITHUB_REF#refs/heads/}-$GITHUB_SHA" \
          .

    # Push the Docker image to Google Container Registry
    - name: Publish
      run: |-
        docker push "gcr.io/$PROJECT_ID/$IMAGE:${GITHUB_REF#refs/heads/}-$GITHUB_SHA"

    # Set up kustomize
    - name: Set up Kustomize
      uses: imranismail/setup-kustomize@v1

    # Deploy the Docker image to the GKE cluster
    - name: Deploy
      run: |-
        cd ./app6/
        kustomize edit set image gcr.io/PROJECT_ID/IMAGE:TAG=gcr.io/$PROJECT_ID/$IMAGE:${GITHUB_REF#refs/heads/}-$GITHUB_SHA
        kustomize build . | kubectl apply -f -
        kubectl rollout status deployment/$IMAGE
        kubectl get services -o wide