Annotation less configuration

It is possible to completely bypass annotations by utilizing already-existing, framework-specific metadata. This mode is currently only supported for Spring Boot applications (i.e. at least one project class is annotated with @SpringBootApplication).

So, for Spring Boot applications, all you need to do is add one of the starters (io.dekorate:kubernetes-spring-starter or io.dekorate:openshift-spring-starter) to the classpath. No need to specify an additional annotation. This provides the fastest way to get started using dekorate with Spring Boot.

To customize the generated manifests you can add dekorate properties to your application.yml or descriptors, or even use annotations along with application.yml / though if you define dekorate properties then the annotation configuration will be replaced by the one specified using properties.

Dekorate looks for supported configuration as follows in increasing order of priority, meaning any configuration found in an application descriptor will override any existing annotation-specified configuration:

  1. Annotations
  3. application.yaml
  4. application.yml
  6. application-kubernetes.yaml
  7. application-kubernetes.yml
Note that only the openshift, kubernetes and knative modules are providing additional properties files.

Then, for Spring Boot applications, it will also take into account the Spring property if set:

  1. application-${}.properties
  2. application-${}.yaml
  3. application-${}.yml

Finally, if the Dekorate profile property is set:

  1. if property is set, then application-${}.properties
  2. if property is set, then application-${}.yaml
  3. if property is set, then application-${}.yml

It’s important to repeat that the override that occurs by fully replacing any lower-priority configuration and not via any kind of merge between the existing and higher-priority values. This means that if you choose to override the annotation-specified configuration, you need to repeat all the configuration you want in the @Env annotation-less configuration.

Here’s the full list of supported configuration options. Special attention should be paid to the path of these properties. The properties’ path match the annotation properties and not what would end up in the manifest, meaning the annotation-less configuration matches the model defined by the annotations. More precisely, what is being configured using properties is the same model as what is configured using annotations. While there is some overlap between how the annotations are configured and the resulting manifest, the properties (or YAML file) still need to provide values for the annotation fields, hence why they need to match how the annotations are configured. Always refer to the configuration options guide if in doubt.

Generated resources when not using annotations

When no annotations are used, the kind of resources to be generated is determined by the dekorate artifacts found in the classpath.

File Required Dependency
kubernetes.json/yml io.dekorate:kubernetes-annotations
openshift.json/yml io.dekorate:openshift-annotations

Note: that starter modules for kubernetes and openshift do transitively add kubernetes-annotations and openshift-annotations respectively.