gke.yml

# Copyright 2019 Google Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# This workflow will build a docker container, publish it to Google Container Registry, and deploy it to GKE.
#
# To configure this workflow:
#
# https://github.com/GoogleCloudPlatform/github-actions/tree/docs/service-account-key/setup-gcloud#inputs
# 1. 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.
#
# 2. Change the values for the GKE_ZONE, GKE_CLUSTER and IMAGE environment variables (below).

name: Build and Deploy to GKE

on:
  push:
    branches:
    - master

# 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: us-west1-a
  GKE_CLUSTER: example-gke-cluster
  IMAGE: gke-test

jobs:
  setup-build-publish-deploy:
    name: Setup, Build, Publish, and Deploy
    runs-on: ubuntu-latest
    steps:

    - name: Checkout
      uses: actions/checkout@master

    # Setup gcloud CLI
    - uses: GoogleCloudPlatform/github-actions/setup-gcloud@master
      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
      
    # Build the Docker image
    - name: Build
      run: |        
        docker build -t gcr.io/"$GKE_PROJECT"/"$IMAGE":"$GITHUB_SHA" \
          --build-arg GITHUB_SHA="$GITHUB_SHA" \
          --build-arg GITHUB_REF="$GITHUB_REF" .

    # Push the Docker image to Google Container Registry
    - name: Publish
      run: |
        docker push gcr.io/$GKE_PROJECT/$IMAGE:$GITHUB_SHA
        
    # Set up kustomize
    - 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

    # Deploy the Docker image to the GKE cluster
    - name: Deploy
      run: |
        gcloud container clusters get-credentials $GKE_CLUSTER --zone $GKE_ZONE --project $GKE_PROJECT
        ./kustomize edit set image gcr.io/$GKE_PROJECT/$IMAGE:${GITHUB_SHA}
        ./kustomize build . | kubectl apply -f -
        kubectl rollout status deployment/gke-test
        kubectl get services -o wide