If you, like I, are struggling to find a simple way to get a Kotlin spring boot application built and deployed to Google Cloud Platform (GCP), this might be a solution you can try!
I found it the easiest to opt in for using Google Artifact Registry (GAR), Google Cloud Run, and obviously in that case, Docker.
The app itself was built in Kotlin with Gradle, but should be practically the same if you're running a maven architecture and using Java.
Using the following Dockerfile:
FROM openjdk
COPY build/libs/**-0.0.1-SNAPSHOT.jar app.jar
EXPOSE 8080
ENTRYPOINT ["java","-jar","/app.jar"]
This was the steps I needed to take in order to get it up and spinning in the cloud.
First and foremost, you need to set up a Service Account in GCP IAM, with the principals Service Account User, Artifact Registry Service Agent, Cloud Run Service Agent and roles/artifactregistry.createOnPushRepoAdmin. Or at least trial and error lead me to those.
You'll also have to generate a key, there's a comment in the workflow about it! 😉
After that, using the following GitHub Actions workflow was the one that finally worked for me:
name: Build and deploy JAR to GCP
on:
push:
branches:
- main
paths-ignore:
- 'README.md'
env:
IMAGE_URL: {region}/{project-id}/{repo}/{app}:${{ github.sha }}
# replace region with your region, ex: europe-north1-docker.pkg.dev
# also replace all project-id etc to match your situation.
jobs:
build:
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v3
- id: 'auth'
name: Authenticate GCP
uses: google-github-actions/auth@v1
with:
credentials_json: '${{ secrets.GCP_SA_KEY }}'
# Generated from IAM > ServiceAccounts > Actions > Keys > ADD KEYS > JSON.
- name: Set up Cloud SDK
uses: google-github-actions/setup-gcloud@v1
- name: Use gcloud CLI
run: gcloud info # Not requred, but can give you hints in the workflow if something goes wrong
- name: Configure docker
run: gcloud auth configure-docker {region} #Replace with your region
- name: Set up Java version
uses: actions/setup-java@v1
with:
java-version: '17'
- name: Run tests
run: ./gradlew test
# you can replace with `mvn clean test` for maven
- name: Build jar
if: success() # only runs if all tests pass
run: ./gradlew bootJar # mvn package work just fine for maven
- name: Docker Build
run: docker build -t $IMAGE_URL .
- name: Docker Push
run: docker push $IMAGE_URL
- name: Update Cloud Run service
uses: google-github-actions/deploy-cloudrun@v1
with:
service: {app} # same as the app in the $IMAGE_URL
image: ${{ env.IMAGE_URL }}
Of course you can also test and build the application before configuring docker and GCP, and the order is not super important. The only really important order is that your - uses: actions/checkout@v3 is before
- id: 'auth'
name: Authenticate GCP
uses: google-github-actions/auth@v1
Else, it will not work.
Hope this helps you / anyone along their way in the CI/CD nightmare happyfuntimes.
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