[ModuleCatalog] Introduce ModuleReleaseMeta CRD

[jeremyharisch]

Description:

We need to create a new Custom Resource Definition (CRD) named ModuleReleaseMeta. However, the name can be challenged if a better alternative is found (e.g., ChannelAssignment or similar). For now we drop the feature of introducing specifying Module versions in this CR.

Detailed decision ticket: #1815

Requirements:

• The spec should include:
  • moduleName: a non-optional string.
  • channels: a list where each item must include the mandatory fields channel and version.
• The apiVersion for the CRD should be operator.kyma-project.io/v1beta2.

Example CRD YAML:

apiVersion: apiextensions.k8s.io/v1
kind: CustomResourceDefinition
metadata:
  name: modulereleasemetas.operator.kyma-project.io
spec:
  group: operator.kyma-project.io
  versions:
    - name: v1beta2
      served: true
      storage: true
      schema:
        openAPIV3Schema:
          type: object
          properties:
            spec:
              type: object
              properties:
                moduleName:
                  type: string
                  description: "The name of the module"
                  minLength: 1
                channels:
                  type: array
                  description: "List of channels and their corresponding versions"
                  items:
                    type: object
                    properties:
                      channel:
                        type: string
                        description: "The release channel"
                        minLength: 1
                      version:
                        type: string
                        description: "The version for the corresponding channel"
                        minLength: 1
                    required:
                    - channel
                    - version
              required:
                - moduleName
                - channels
  scope: Namespaced
  names:
    plural: modulereleasemetas
    singular: modulereleasemeta
    kind: ModuleReleaseMeta
    shortNames:
      - mrm

Example CR yaml

apiVersion: operator.kyma-project.io/v1beta2
kind: ModuleReleaseMeta
metadata:
  name: eventing
spec:
  moduleName: eventing
  channels:
  - channel: regular
    version: 1.0.0
  - channel: fast
    version: 1.1.0
  - channel: experimental
    version: 2.0.0

Acceptance Criteria:

• CRD is created with the above structure (or a modified version if the name is challenged).
• Documentation is added to explain the new CRD and its usage.
• Ensure validation is present for the channels list (there should be no duplicates, channels only from specific list, same as in Kyma CR)

  lifecycle-manager/api/v1beta2/kyma_types.go

  Lines 51 to 54 in 2342670

  	// Modules specifies the list of modules to be installed
  	// +listType=map
  	// +listMapKey=name
  	Modules []Module `json:"modules,omitempty"`

• Ensure validation is present for versions (semver)

[c-pius]

Possible regex for the version: https://github.com/kyma-project/lifecycle-manager/blob/feat/module-catalogue-improvements/api/v1beta2/moduletemplate_types.go#L86