deploy-gke.yml

name: Build and Deploy to GKE

on:
  pull_request:
    types: [opened, synchronize, reopened, edited]
    branches: 
      - master

# Environment variables available to all jobs and steps in this workflow
env:
  GKE_PROJECT: ${{ secrets.GKE_PROJECT }}
  GKE_EMAIL: ${{ secrets.GKE_EMAIL }}
  GITHUB_SHA: ${{ github.sha }}
  GKE_ZONE: ${{ secrets.GKE_ZONE }}
  GKE_CLUSTER: ${{ secrets.GKE_CLUSTER }}
  IMAGE: ${{ secrets.IMAGE }}
  REGISTRY_HOSTNAME: ${{ secrets.REGISTRY_HOSTNAME }}
  DEPLOYMENT_NAME: ${{ secrets.DEPLOYMENT_NAME }}
  SERVER: ${{ secrets.REACT_APP_SERVER }}
  NAVER_MAP_KEY: ${{ secrets.REACT_APP_NAVER_MAP_KEY }}

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

    - name: Checkout
      uses: actions/checkout@v2

    # set .env value
    - name: set .env.* file
      run: |
        sed -i "1s#=#&$SERVER#" .env.production
        sed -i "2s#=#&$NAVER_MAP_KEY#" .env.production
        sed -i "1s#=#&$SERVER#" .env.development
        sed -i "2s#=#&$NAVER_MAP_KEY#" .env.development

    # Setup gcloud CLI
    - uses: GoogleCloudPlatform/github-actions/setup-gcloud@master
      with:
        version: '285.0.0'
        project_id: ${{ secrets.GCP_PROJECT_ID }}
        service_account_email: ${{ secrets.GKE_EMAIL }}
        service_account_key: ${{ secrets.GKE_KEY }}

    # Configure docker to use the gcloud command-line tool as a credential helper
    - run: |
        gcloud auth configure-docker
      
    # Build the Docker image
    - name: Build
      run: |        
        docker build -t "$REGISTRY_HOSTNAME"/"$GKE_PROJECT"/"$IMAGE":"$GITHUB_SHA" \
          --build-arg GITHUB_SHA="$GITHUB_SHA" \
          --build-arg GITHUB_REF="$GITHUB_REF" .
    # Push the Docker image to Google Container Registry
    - name: Publish
      run: |
        docker push $REGISTRY_HOSTNAME/$GKE_PROJECT/$IMAGE:$GITHUB_SHA
        
    # Set up kustomize
    - name: Set up Kustomize
      run: |
        curl -o kustomize --location https://github.com/kubernetes-sigs/kustomize/releases/download/v3.1.0/kustomize_3.1.0_linux_amd64
        chmod u+x ./kustomize
    # Deploy the Docker image to the GKE cluster
    - name: Deploy
      run: |
        gcloud container clusters get-credentials $GKE_CLUSTER --zone $GKE_ZONE --project $GKE_PROJECT
        ./kustomize edit set image $REGISTRY_HOSTNAME/$GKE_PROJECT/$IMAGE:${GITHUB_SHA}
        ./kustomize build . | kubectl apply -f -
        kubectl rollout status deployment/$DEPLOYMENT_NAME
        kubectl get services -o wide