Controller Manager

Controls the State
Handles Failures

• Replication Controller: Ensures that a specified number of Pod replicas are running.
• Endpoint Controller: Manages Endpoints associated with Services.
• Namespace Controller: Manages the lifecycle of Namespaces.
• Service Account Controller and Token Controller: Create default Service Account and API tokens for new namespaces.
• Node Controller: Monitors the health of nodes and manages the lifecycle of nodes.
• Job Controller: Ensures Job resources run to completion.

The controller fetches the current state from the Kubernetes API server