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Concepts

This page introduces some core concepts about Karmada.

Resource Template​

Karmada uses the Kubernetes Native API definition for the federated resource template, to make it easy to integrate with existing tools that have already been adopted by Kubernetes.

Propagation Policy​

Karmada offers a standalone Propagation (placement) Policy API to define multi-cluster scheduling and spreading requirements.

  • Support 1:n mapping of policy:workloads. Users don't need to indicate scheduling constraints every time creating federated applications.

  • With default policies, users can directly interact with the Kubernetes API.

Override Policy​

Karmada provides a standalone Override Policy API for specializing the automation of cluster-related configuration. For example:

  • Override the image prefix based on the member cluster region.

  • Override StorageClass depending on your cloud provider.

The following diagram shows how Karmada resources are propagated to member clusters.

karmada-resource-relation