Maven Build/Deploy on GKE

maven.yml

name: Build Maven projet and deploy on Kube
 
on: [push, pull_request]
 
env:
  GKE_PROJECT: ${{ secrets.GKE_PROJECT }}
  GKE_CLUSTER: java-hello-world-cluster
  GKE_ZONE: us-central1-f
  IMAGE: java-hello-world

jobs:
  compile:
    runs-on: ubuntu-latest
    strategy:
      matrix:
        java: [ 11 ]
    name: Java ${{ matrix.java }} compile
    steps:
      - uses: actions/checkout@master
      - name: Setup java
        uses: actions/setup-java@v1
        with:
          java-version: ${{ matrix.java }}
      - run: mvn -f pom.xml clean compile

  build:
    runs-on: ubuntu-latest
    needs: compile
    name: Build Maven project
    steps:
    - uses: actions/checkout@v1
    - uses: actions/cache@v1
      with:
        path: ~/.m2/repository
        key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}
        restore-keys: |
          ${{ runner.os }}-maven-
    - name: Set up JDK 11
      uses: actions/setup-java@v1
      with:
        java-version: 11
    - name: Build and test project
      run: mvn -f pom.xml clean verify
    - name: Upload Maven build artifact
      uses: actions/upload-artifact@v1
      with:
        name: artifact
        path: target/java-hello-world-1.0-SNAPSHOT.jar

  deploy: 
    runs-on: ubuntu-latest  
    needs: build 
    name: Build Docker container and deploy to Kubernetes
    steps:
    - uses: actions/checkout@v1
    - name: Download Maven build artifact
      uses: actions/download-artifact@v1
      with:
        name: artifact
    - name: Build Docker container
      run: |
        mkdir -p java-hello-world/target
        mv artifact/java-hello-world-1.0-SNAPSHOT.jar java-hello-world/target
        docker build -t java-hello-world . --tag gcr.io/$GKE_PROJECT/$IMAGE
    - name: install python-openssl
      run: sudo apt-get install -y python-openssl -o=Dpkg::Use-Pty=0
    - name: Setup gcloud environment
      uses: GoogleCloudPlatform/[email protected]
      with:
        service_account_key: ${{ secrets.GCP_SA_KEY }}
    - run: |
        gcloud auth configure-docker
    - name: Publish
      run: |
        docker push gcr.io/$GKE_PROJECT/$IMAGE
    - 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
    - name: Deploy
      run: |
        gcloud container clusters get-credentials $GKE_CLUSTER --zone $GKE_ZONE --project $GKE_PROJECT
        ./kustomize edit set image gcr.io/GKE_PROJECT/IMAGE=gcr.io/$GKE_PROJECT/$IMAGE
        ./kustomize build . | kubectl apply -f -
        kubectl get services -o wide