deploy.yml

# This workflow will build a docker container, publish it to Google Container Registry, and deploy it to GKE.
#
# To configure this workflow:
#
# 1. Ensure that your repository contains the necessary configuration for your Google Kubernetes Engine cluster, including deployment.yml, kustomization.yml, service.yml, etc.
#
# 2. Set up secrets in your workspace: GKE_PROJECT with the name of the project, GKE_EMAIL with the service account email, GKE_KEY with the Base64 encoded JSON service account key (https://github.com/GoogleCloudPlatform/github-actions/tree/docs/service-account-key/setup-gcloud#inputs).
#
# 3. Change the values for the GKE_ZONE, GKE_CLUSTER, IMAGE, REGISTRY_HOSTNAME and DEPLOYMENT_NAME environment variables (below).

name: Build and Deploy to GKE

on:
  push:
    branches:
      - main

# 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: europe-west2-a
  REGISTRY_HOSTNAME: gcr.io

jobs:
  setup-build-publish-deploy:
    name: Setup, Build, Publish, and Deploy
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v2

      # Setup gcloud CLI
      - uses: google-github-actions/setup-gcloud@v0
        with:
          version: "270.0.0"
          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: |
          # Set up docker to authenticate
          # via gcloud command-line tool.
          gcloud auth configure-docker

      - name: Extract branch name
        shell: bash
        run: echo "##[set-output name=branch;]$(echo ${GITHUB_REF#refs/heads/})"
        id: extract_branch

      # Build the Docker image
      # TODO pasar los hosts por build-arg al build
      - name: Build
        run: |
          docker build --target app -t "$REGISTRY_HOSTNAME"/"$GKE_PROJECT"/"app_${{ steps.extract_branch.outputs.branch }}":"$GITHUB_SHA" \
            --build-arg GITHUB_SHA="$GITHUB_SHA" ./

      # Push the Docker image to Google Container Registry
      - name: Publish
        run: |
          docker push $REGISTRY_HOSTNAME/$GKE_PROJECT/app_${{ steps.extract_branch.outputs.branch }}:$GITHUB_SHA

      # Set up kustomize
      - name: Set up Kustomize
        run: |
          curl -o kustomize-zip --location https://github.com/kubernetes-sigs/kustomize/releases/download/kustomize%2Fv4.5.4/kustomize_v4.5.4_linux_amd64.tar.gz
          tar -xvf kustomize-zip
          chmod u+x ./kustomize

      # Deploy the Docker image to the GKE cluster
      - name: Deploy
        run: |
          gcloud container clusters get-credentials cluster-${{ steps.extract_branch.outputs.branch }} --zone $GKE_ZONE --project $GKE_PROJECT

          (cd ./deploy && ../kustomize edit set image ENV_IMAGE=$REGISTRY_HOSTNAME/$GKE_PROJECT/app_${{ steps.extract_branch.outputs.branch }}:$GITHUB_SHA)
          ./kustomize build ./deploy | kubectl apply -f -
          kubectl get deploy --output name | \
            timeout 3m \
              xargs -n1 -t \
                kubectl rollout status
          kubectl get services -o wide