Add GitHub Actions workflow for GKE deployment

.github/workflows/google.yml

@@ -0,0 +1,116 @@
+# This workflow will build a docker container, publish it to Google Container
+# Registry, and deploy it to GKE when there is a push to the "main"
+# branch.
+#
+# To configure this workflow:
+#
+# 1. Enable the following Google Cloud APIs:
+#
+#    - Artifact Registry (artifactregistry.googleapis.com)
+#    - Google Kubernetes Engine (container.googleapis.com)
+#    - IAM Credentials API (iamcredentials.googleapis.com)
+#
+#    You can learn more about enabling APIs at
+#    https://support.google.com/googleapi/answer/6158841.
+#
+# 2. Ensure that your repository contains the necessary configuration for your
+#    Google Kubernetes Engine cluster, including deployment.yml,
+#    kustomization.yml, service.yml, etc.
+#
+# 3. Create and configure a Workload Identity Provider for GitHub:
+#    https://github.com/google-github-actions/auth#preferred-direct-workload-identity-federation.
+#
+#    Depending on how you authenticate, you will need to grant an IAM principal
+#    permissions on Google Cloud:
+#
+#    - Artifact Registry Administrator (roles/artifactregistry.admin)
+#    - Kubernetes Engine Developer (roles/container.developer)
+#
+#    You can learn more about setting IAM permissions at
+#    https://cloud.google.com/iam/docs/manage-access-other-resources
+#
+# 5. Change the values in the "env" block to match your values.
+
+name: 'Build and Deploy to GKE'
+
+on:
+  push:
+    branches:
+      - '"main"'
+
+env:
+  PROJECT_ID: 'my-project' # TODO: update to your Google Cloud project ID
+  GAR_LOCATION: 'us-central1' # TODO: update to your region
+  GKE_CLUSTER: 'cluster-1' # TODO: update to your cluster name
+  GKE_ZONE: 'us-central1-c' # TODO: update to your cluster zone
+  DEPLOYMENT_NAME: 'gke-test' # TODO: update to your deployment name
+  REPOSITORY: 'samples' # TODO: update to your Artifact Registry docker repository name
+  IMAGE: 'static-site'
+  WORKLOAD_IDENTITY_PROVIDER: 'projects/123456789/locations/global/workloadIdentityPools/my-pool/providers/my-provider' # TODO: update to your workload identity provider
+
+jobs:
+  setup-build-publish-deploy:
+    name: 'Setup, Build, Publish, and Deploy'
+    runs-on: 'ubuntu-latest'
+    environment: 'production'
+
+    permissions:
+      contents: 'read'
+      id-token: 'write'
+
+    steps:
+      - name: 'Checkout'
+        uses: 'actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332' # actions/checkout@v4
+
+      # Configure Workload Identity Federation and generate an access token.
+      #
+      # See https://github.com/google-github-actions/auth for more options,
+      # including authenticating via a JSON credentials file.
+      - id: 'auth'
+        name: 'Authenticate to Google Cloud'
+        uses: 'google-github-actions/auth@f112390a2df9932162083945e46d439060d66ec2' # google-github-actions/auth@v2
+        with:
+          workload_identity_provider: '${{ env.WORKLOAD_IDENTITY_PROVIDER }}'
+
+      # Authenticate Docker to Google Cloud Artifact Registry
+      - name: 'Docker Auth'
+        uses: 'docker/login-action@9780b0c442fbb1117ed29e0efdff1e18412f7567' # docker/login-action@v3
+        with:
+          username: 'oauth2accesstoken'
+          password: '${{ steps.auth.outputs.auth_token }}'
+          registry: '${{ env.GAR_LOCATION }}-docker.pkg.dev'
+
+      # Get the GKE credentials so we can deploy to the cluster
+      - name: 'Set up GKE credentials'
+        uses: 'google-github-actions/get-gke-credentials@6051de21ad50fbb1767bc93c11357a49082ad116' # google-github-actions/get-gke-credentials@v2
+        with:
+          cluster_name: '${{ env.GKE_CLUSTER }}'
+          location: '${{ env.GKE_ZONE }}'
+
+      # Build the Docker image
+      - name: 'Build and push Docker container'
+        run: |-
+          DOCKER_TAG="${GAR_LOCATION}-docker.pkg.dev/${PROJECT_ID}/${REPOSITORY}/${IMAGE}:${GITHUB_SHA}"
+
+          docker build \
+            --tag "${DOCKER_TAG}" \
+            --build-arg GITHUB_SHA="${GITHUB_SHA}" \
+            --build-arg GITHUB_REF="${GITHUB_REF}" \
+            .
+
+          docker push "${DOCKER_TAG}"
+
+      # Set up kustomize
+      - name: 'Set up Kustomize'
+        run: |-
+          curl -sfLo kustomize https://github.com/kubernetes-sigs/kustomize/releases/download/kustomize%2Fv5.4.3/kustomize_v5.4.3_linux_amd64.tar.gz
+          chmod u+x ./kustomize
+
+      # Deploy the Docker image to the GKE cluster
+      - name: 'Deploy to GKE'
+        run: |-
+          # replacing the image name in the k8s template
+          ./kustomize edit set image LOCATION-docker.pkg.dev/PROJECT_ID/REPOSITORY/IMAGE:TAG=$GAR_LOCATION-docker.pkg.dev/$PROJECT_ID/$REPOSITORY/$IMAGE:$GITHUB_SHA
+          ./kustomize build . | kubectl apply -f -
+          kubectl rollout status deployment/$DEPLOYMENT_NAME
+          kubectl get services -o wide