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Import Strategy

CAAPF follows a simple import strategy for CAPI clusters:

  1. Each CAPI cluster has a corresponding Fleet Cluster object.
  2. Each CAPI Cluster Class has a corresponding Fleet ClusterGroup object.
  3. When a CAPI Cluster references a ClusterClass in a different namespace, a ClusterGroup is created in the Cluster namespace. This ClusterGroup targets all clusters in this namespace that reference the same ClusterClass. See the configuration section for details.
  4. If at least one CAPI Cluster references a ClusterClass in a different namespace, a BundleNamespaceMapping is created in the ClusterClass namespace. This allows Fleet Cluster resources to use application sources such as Bundles, HelmOps, or GitRepos from the ClusterClass namespace as if they were deployed in the Cluster namespace. See the configuration section for details.

By default, CAAPF imports all CAPI clusters under Fleet management. See the configuration section for details.

CAAPF-import-groups excalidraw dark

Label Synchronization

Fleet relies on Cluster labels, Cluster names, and ClusterGroups for target matching when deploying applications or referenced repository content. To ensure consistency, CAAPF synchronizes resource labels:

  1. From the CAPI ClusterClass to the imported Fleet Cluster resource.
  2. From the CAPI ClusterClass to the imported Fleet ClusterGroup resource.

When a CAPI Cluster references a ClusterClass, CAAPF applies two specific labels to both the Cluster and ClusterGroup resources:

  • clusterclass-name.fleet.addons.cluster.x-k8s.io: <class-name>
  • clusterclass-namespace.fleet.addons.cluster.x-k8s.io: <class-ns>