build-and-deploy.yaml

name: Build & Deploy

on:
  workflow_dispatch:
  push:
    branches: [ main ]
  pull_request:
    branches: [ main ]

env:
  REGISTRY: ghcr.io
  IMAGE_NAME: ${{ github.repository }}
  GKE_CLUSTER: travigo-gke
  GCP_ZONE: europe-central2-a

jobs:
  build-docker:
    name: Build Docker image
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write

    steps:
      - name: Checkout repository
        uses: actions/checkout@v3
      
      - name: Log in to the Container registry
        uses: docker/login-action@v2
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Extract metadata (tags, labels) for Docker
        id: meta
        uses: docker/metadata-action@v4
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          tags: |
            type=ref,event=branch
            type=ref,event=pr
            type=sha,format=short
            type=sha,format=long

      - name: Build and push Docker image
        uses: docker/build-push-action@v4
        with:
          context: .
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}

  deploy-helm:
    if: github.ref == 'refs/heads/main'
  
    name: Deploy to Kubernetes
    runs-on: ubuntu-latest
    environment: 
      name: production
      url: https://travigo.app

    needs: build-docker

    permissions:
      contents: 'read'
      id-token: 'write'

    steps:
    - name: Checkout
      uses: actions/checkout@v3

    - name: Helm tool installer
      uses: Azure/setup-helm@v3

    - name: Kubectl tool installer
      uses: Azure/setup-kubectl@v3

    - name: Get GCP Auth
      uses: 'google-github-actions/auth@v2'
      with:
        workload_identity_provider: ${{ secrets.GCP_WORKLOAD_IDENTITY_PROVIDER }}
        service_account: ${{ secrets.GCP_SERVICE_ACCOUNT }}
    - name: Get GKE Cluster
      uses: 'google-github-actions/get-gke-credentials@v2'
      with:
        cluster_name: ${{ env.GKE_CLUSTER }}
        location: ${{ env.GCP_ZONE }}

    - name: Helm upgrade
      run: |-
        helm upgrade -i travigo-web-ui ./charts/travigo-web-ui --set image.tag=sha-${{ github.sha }}