kcp is a minimal Kubernetes API server

How minimal exactly? kcp doesn't know about Pods or Nodes, let alone Deployments, Services, LoadBalancers, etc.

By default, kcp only knows about:

• Namespaces
• ServiceAccounts and role-based access control types like Role and RoleBinding
• Secrets and ConfigMaps, to store configuration data
• CustomResourceDefinitions, to define new types
• a handful of other low-level resources like Leases, Events, etc.

Like vanilla Kubernetes, kcp persists these resources in etcd for durable storage.

Any other resources, including Kubernetes-standard resources like Pods, Nodes and the rest, can be added as CRDs and reconciled using the standard controllers.

https://github.com/kcp-dev/kcp