Creating the cluster configuration manifests

Cluster configuration manifests are the files used by Kubernetes to be able to generate the required resources for your application. These are usually YAML files that contain a Kubernetes object declarative description that Kubernetes will interpret and try to satisfy by creating the requested objects and their resources using the underlying hardware infrastructure.

Writing and maintaining the cluster configuration files is a complex task that usually requires good knowledge and understanding of the different Kubernetes objects. Luckily for us, Eclipse JKube can also take care of creating these files for our application with a good set of opinionated defaults. Since our application has some special requirements such as a PostgreSQL database connection, we’ll need to provide some minor configuration tweaks to override some of these default values.

Eclipse JKube provides different ways to override the default configuration, including...