Quick Guide to Microservices with Quarkus on Openshift

Quarkus is a framework for building Java applications in times of microservices and serverless architectures. If you compare it with other frameworks like Spring Boot / Spring Cloud or Micronaut, the first difference is native support for running on Kubernetes or Openshift platforms. It is built on top of well-known Java standards like CDI, JAX-RS, and Eclipse MicroProfile which also distinguishes it from Spring Boot or Micronaut.

Running Java Microservices on OpenShift using Source-2-Image

One of the reason you would prefer OpenShift instead of Kubernetes is the simplicity of running new applications. When working with plain Kubernetes you need to provide already built image together with the set of descriptor templates used for deploying it. OpenShift introduces Source-2-Image feature used for building reproducible Docker images from application source code. With S2I you don’t have provide any Kubernetes YAML templates or build Docker image by yourself, OpenShift will do it for you. Let’s see how it works. The best way to test it locally is via Minishift. But the first step is to prepare sample applications source code.