Java Microservices with Spring Boot on Kubernetes/OpenShift

This repository holds the demo sources of Spring Boot on Kubernetes/OpenShift. The demos cover the basics of getting started with Spring Boot on Kubernetes/OpenShift covering the following,

• Simple HelloWorld - Deploy and Debug Spring Boot Application in Kubernetes

• Doing Discovery and Load Balancing of Spring Boot services via Kubernetes Services

  • Simple Calculator - the service that will be discovered and consumed

  • Helloboot Discovery - consumer simple calculator service

• Using fabric8-maven-plugin to do Canary Deployment

Pre-requisite

Before you try the demos download and setup minishift or CDK

Start minishift

 minishift --profile springboot_msa_on_k8s --memory=4096 --cpus=2 start (1)

1. Start a minishift with 4GB memory and 2 CPUS and profile name called springboot_msa_on_k8s

Stop minishift

 minishift stop

Tip	to setup DOCKER* variables in the current shell execute command $(eval minikube docker-env) to setup OpenShift environment variables in the current shell execute command $(eval minikube oc-env)

Common commands

 ./mvnw fabric8:deploy (1)
 ./mvnw fabric8:undeploy (2)
 ./mvnw fabric8:resource (3)

1. build and deploy the maven project to OpenShift/Kubernetes

2. undeploy the maven project if it exits in OpenShift/Kubernetes

3. Generate the Kubernetes/OpenShift manifests