google-cloudrun-docker.yml

# This workflow build and push a Docker container to Google Artifact Registry and deploy it on Cloud Run when a commit is pushed to the "debug" branch
#
# Overview:
#
# 1. Authenticate to Google Cloud
# 2. Authenticate Docker to Artifact Registry
# 3. Build a docker container
# 4. Publish it to Google Artifact Registry
# 5. Deploy it to Cloud Run
#
# To configure this workflow:
#
# 1. Ensure the required Google Cloud APIs are enabled:
#
#    Cloud Run            run.googleapis.com
#    Artifact Registry    artifactregistry.googleapis.com
#
# 2. Create and configure Workload Identity Federation for GitHub (https://github.com/google-github-actions/auth#setting-up-workload-identity-federation)
#
# 3. Ensure the required IAM permissions are granted
#
#    Cloud Run
#      roles/run.admin
#      roles/iam.serviceAccountUser     (to act as the Cloud Run runtime service account)
#
#    Artifact Registry
#      roles/artifactregistry.admin     (project or repository level)
#
#    NOTE: You should always follow the principle of least privilege when assigning IAM roles
#
# 4. Create GitHub secrets for WIF_PROVIDER and WIF_SERVICE_ACCOUNT
#
# 5. Change the values for the GAR_LOCATION, SERVICE and REGION environment variables (below).
#
# NOTE: To use Google Container Registry instead, replace ${{ env.GAR_LOCATION }}-docker.pkg.dev with gcr.io
#
# For more support on how to run this workflow, please visit https://github.com/marketplace/actions/deploy-to-cloud-run
#
# Further reading:
#   Cloud Run IAM permissions                 - https://cloud.google.com/run/docs/deploying
#   Artifact Registry IAM permissions         - https://cloud.google.com/artifact-registry/docs/access-control#roles
#   Container Registry vs Artifact Registry   - https://cloud.google.com/blog/products/application-development/understanding-artifact-registry-vs-container-registry
#   Principle of least privilege              - https://cloud.google.com/blog/products/identity-security/dont-get-pwned-practicing-the-principle-of-least-privilege

name: Build and Deploy to Cloud Run

on:
  push:
    branches:
      - debug
      - master
  pull_request:
    branches:
      - master

env:
  PROJECT_ID: ${{ secrets.PROJECT_ID }}
  GAR_LOCATION: ${{ secrets.GAR_LOCATION }}
  SERVICE: ${{ secrets.SERVICE }}
  REGION: ${{ secrets.REGION }}

jobs:
  deploy:
    environment: 
      name: ${{ github.ref == 'refs/heads/master' && 'production' || 'debug' }}
    
    permissions:
      contents: 'read'
      id-token: 'write'

    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v2

      - name: Google Auth
        id: auth
        uses: 'google-github-actions/auth@v0'
        with:
          credentials_json: '${{ secrets.GCR_SERVICE_ACCOUNT_JSON }}'

     # Authenticate Docker to Google Cloud Artifact Registry
      - name: Docker Auth
        id: docker-auth
        uses: 'docker/login-action@v1'
        with:
         registry: ${{ env.GAR_LOCATION }}-docker.pkg.dev
         username: _json_key
         password: ${{ secrets.GCR_SERVICE_ACCOUNT_JSON }}

      
      # Build and push the Docker image, passing the .env_file
      - name: Build and Push Container
        run: |-          
          docker build \
            -t "${{ env.GAR_LOCATION }}-docker.pkg.dev/${{ env.PROJECT_ID }}/${{ env.SERVICE }}/${{ env.SERVICE }}:${{ github.sha }}" ./
          docker push "${{ env.GAR_LOCATION }}-docker.pkg.dev/${{ env.PROJECT_ID }}/${{ env.SERVICE }}/${{ env.SERVICE }}:${{ github.sha }}"

      # END - Docker auth and build

      - name: Prepare Environment Variables for Deployment
        id: prepare-env
        run: |
          # Convert environment variables to JSON and write to a file
          echo '${{ toJSON(vars) }}' > env_vars.json
          cat env_vars.json

          env_vars=$(jq -r 'to_entries | map("\(.key)=\(.value)") | join(",")' env_vars.json)

          echo "::set-output name=env_vars::$env_vars"

          #remove no longer needed env_vars.json file
          rm -f env_vars.json

      - name: Deploy to Cloud Run
        id: deploy
        uses: google-github-actions/deploy-cloudrun@v0
        with:
          env_vars: ${{ steps.prepare-env.outputs.env_vars }}
          service: ${{ env.SERVICE }}
          region: ${{ env.REGION }}
          image: ${{ env.GAR_LOCATION }}-docker.pkg.dev/${{ env.PROJECT_ID }}/${{ env.SERVICE }}/${{ env.SERVICE }}:${{ github.sha }}
          
      # If required, use the Cloud Run url output in later steps
      - name: Show Output
        run: echo ${{ steps.deploy.outputs.url }}

      - name: Get changed files in the docs folder
        uses: dorny/paths-filter@v3
        id: filter
        with:
          fetch-depth: 0
          filters: |
            migrations:
              - 'migrations/**'

      - name: Debug - List Changed Files
        run: echo "${{ steps.filter.outputs.migrations }}"

      - name: Execute Cloud Run Migration Job
        if: steps.changed-files-specific.outputs.any_changed == 'true'
        run: |
          gcloud run jobs execute migrate \
          --project ${{ env.PROJECT_ID }} \