crd-generator and annotations

[maledoux]

Does the crd-generator have the ability to parse annotations in the Spec and Status classes to add description, enum, min/max values, required attributes etc... on the properties so the are generated in the yaml ?

In the usage, it is mentioned:
Several annotations are available to override the default behavior if it doesn't fit your needs

Here are my objects:

@Group("storage.test.com")
@Version("v1")
public class Database extends CustomResource<DatabaseSpec, DatabaseStatus> implements Namespaced {

}

public class DatabaseSpec {

  private String engine;

  public String getEngine() {
    return engine;
  }

  public void setEngine(String engine) {
    this.engine = engine;
  }
}

public class DatabaseStatus {

  private String version;

  public String getVersion() {
    return version;
  }

  public void setVersion(String version) {
    this.version = version;
  }
}

and the resulting YAML:

apiVersion: apiextensions.k8s.io/v1
kind: CustomResourceDefinition
metadata:
  name: databases.storage.test.com
spec:
  group: storage.test.com
  names:
    kind: Database
    plural: databases
    singular: database
  scope: Namespaced
  versions:
  - name: v1
    schema:
      openAPIV3Schema:
        properties:
          status:
            properties:
              version:
                type: string
            type: object
          spec:
            properties:
              engine:
                type: string
            type: object
        type: object
    served: true
    storage: true
    subresources:
      status: {}

I would like the output to be something like this:

    schema:
      openAPIV3Schema:
        properties:
          status:
            properties:
              version:
                type: string
            type: object
          spec:
            description: DatabaseSpec represents the desired state of a Database.
            properties:
              engine:
                description: Engine is the underlying database engine hosting this database.
                enum:
                - mongodb
                - mysqldb
                type: string
            type: object
            required:
            - engine
        type: object

Are the annotations mentioned in the usage meant to generate this type of information in the YAML ?

[rohanKanojia]

I'm not sure about this. I think @metacosm can provide some insights on whether it's supported or if it's a valid use case

[maledoux]

@rohanKanojia
Just wondering if the crd generation will include annotation parsing for CRD validation, like the Operator SDK has with kubebuilder.
https://book.kubebuilder.io/reference/markers/crd-validation.html

[manusa]

So far it's not supported yet (unless I missed something).

In scope of #2670 and from a discussion in #2611, there was a proposal for something like this:

The implementation for this method is were we should be really creative in terms of inferring OpenAPIV3Schema from the POJO fields, annotations, JSR 303, etc.

[metacosm]

Enums are supported. We could add more annotations to support more descriptive CRDs, indeed.

[stale]

This issue has been automatically marked as stale because it has not had any activity since 90 days. It will be closed if no further activity occurs within 7 days. Thank you for your contributions!

[xlf12]

I would also be happy about such a functionality. We have learned from the Spring framework that the documentation for so-called configuration properties is generated from the Java doc. I don't know how the generation is done here. The use of Java-Doc would of course be interesting.
If the code is only generated on the compiled classes, this would of course not be possible.

[stale]

This issue has been automatically marked as stale because it has not had any activity since 90 days. It will be closed if no further activity occurs within 7 days. Thank you for your contributions!

[stale]

This issue has been automatically marked as stale because it has not had any activity since 90 days. It will be closed if no further activity occurs within 7 days. Thank you for your contributions!

[manusa]

Hi @andreaTP,
Do you think we should reopen this one?
AFAIR, this functionality was implemented already (needs link to PRs/issue).

[andreaTP]

@manusa correct closed in #4348