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`NamespacedCloudProfile`s

NamespacedCloudProfiles are resources in Gardener that allow project-level customization of CloudProfiles. They enable project administrators to create and manage cloud profiles specific to their projects and reduce the operational burden on central Gardener operators. As opposed to CloudProfiles, NamespacedCloudProfiles are namespaced and thus limit configuration options for Shoots, such as special machine types, to the associated project only. These profiles inherit from a parent CloudProfile and can override or extend certain fields while maintaining backward compatibility.

Project viewers have the permission to see NamespacedCloudProfiles associated with a particular project. Project administrators can generally create, edit, or delete NamespacedCloudProfiles but with some exceptions (see the restrictions outlined below).

When creating or updating a Shoot, the cloud profile reference can be set to point to a NamespacedCloudProfile, allowing for more granular and project-specific configurations. The modification of a Shoot’s cloud profile reference is restricted to switching within the same profile hierarchy, i.e. from a CloudProfile to a descendant NamespacedCloudProfile, from a NamespacedCloudProfile to its parent CloudProfile and between NamespacedCloudProfiles having the same CloudProfile parent. Changing the reference from one CloudProfile or descendant NamespacedCloudProfile to another CloudProfile or descendant NamespacedCloudProfile is not allowed.

The usage of NamespacedCloudProfiles is currently subject to an alpha feature gate and is not enabled by default. It requires the enabled provider extensions to support the feature as well. The feature gate can be enabled by passing the --feature-gates=NamespacedCloudProfiles=true flag to the Gardener API server.

Please see this example manifest and GEP-25 for additional information.

Field Modification Restrictions

In order to make changes to specific fields in the NamespacedCloudProfile, a user must be granted custom RBAC verbs. Modifications of these fields need to be performed with caution and might require additional validation steps or accompanying changes. By default, only landscape operators have the permission to change these fields, as they are usually able to judge the implications.

Changing the following fields require the corresponding custom verbs:

For changing the .spec.kubernetes field, the custom verb modify-spec-kubernetes is required.
For changing the .spec.machineImages field, the custom verb modify-spec-machineimages is required.
For changing the .spec.providerConfig field, the custom verb modify-spec-providerconfig is required.

The assignment of these custom verbs can be achieved by creating a ClusterRole and a RoleBinding like in the following example:

---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: namespacedcloudprofile-kubernetes
rules:
- apiGroups: ["core.gardener.cloud"] 
  resources: ["namespacedcloudprofiles"]
  verbs: ["modify-spec-kubernetes"]

---
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
  name: edit-kubernetes
  namespace: dev
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: namespacedcloudprofile-kubernetes
subjects:
- apiGroup: rbac.authorization.k8s.io
  kind: User
  name: alice.doe@example.com