README.compute-engine.md

Deploy Spring Boot web application to Google Cloud Compute Engine

Purpose

The purpose of this README is to show how to deploy a Spring Boot web application to GCP Compute Engine. This application was created by running

curl https://start.spring.io/starter.tgz -d packaging=jar \ 
 -d dependencies=web -d baseDir=spring-boot-containerized  \
 -d packageName=ro.robertsicoie.kubernetes | tar -xzvf -

and then adding a @GetMapping endpoint.

Prerequisites setup

First, you must have a GCP account.

Then install the Google Cloud SDK

Install Docker.

Build image and push it to Container Registry.

Deploy Docker image as managed instance groups to GCP Compute Engine

Set the default project, by replacing [PROJECT-ID] with your project ID.

gcloud config set project [PROJECT-ID]

Set default compute zone, by replacing [COMPUTE-ZONE] with the desired geographical compute zone, for example us-west1-a

gcloud config set compute/zone [COMPUTE-ZONE]

Create an instance template to run the image on centos-7 machines

 gcloud beta compute instance-templates create-with-container spring-boot-docker-with-image --container-image [HOSTNAME]/[PROJECT-ID]/spring-boot-containerized --image-family centos-7 --image-project centos-cloud

Create an instance group of two machines

gcloud compute instance-groups managed create spring-boot-group --base-instance-name spring-boot-vm --size 2 --template spring-boot-docker-with-image

Deploy scripts

Use compute-engine-managed-instance-groups.sh or compute-engine-single-instance.sh to deploy or undeploy to Compute Engine. These scripts do not use the Docker image.

Cleanup

To remove the image from Container Registry run:

gcloud container images delete [HOSTNAME]/[PROJECT-ID]/[IMAGE]

Remove the cluster

gcloud container clusters delete [CLUSTER-NAME]

Remove the instance group

gcloud compute instance-groups managed delete spring-boot-group

Remove the instance template

gcloud compute instance-templates delete spring-boot-docker-with-image