Control Plane
graph TB
kubectl{kubectl}
subgraph ControlPlane
api(API Server)
controller(Controller Manager)
scheduler(Scheduler)
etcd(etcd)
end
kubectl-->api
controller-->api
scheduler-->api
api-->kubelet
api-->etcd
classDef green fill:#9f6,stroke:#333,stroke-width:4px;
classDef orange fill:#f96,stroke:#333,stroke-width:4px;
classDef blue fill:#6495ed,stroke:#333,stroke-width:4px;
class api blue;
class internet green;
class kubectl orange;
One or More API Servers: Entry point for REST / kubectl
etcd: Distributed key/value store
Controller-manager: Always evaluating current vs desired state
Scheduler: Schedules pods to worker nodes
Check out the official Kubernetes documentation for a more in-depth explanation of control plane components.