Components of the Control Plane:

1. API Server:

   • Acts as the entry point for all administrative commands.

   • Exposes RESTful APIs for interaction.

   • Example command to interact with the API Server:

     kubectl get pods

2. Scheduler:

   • Assigns Pods to Nodes based on resource requirements and availability.

3. Controller Manager:

   • Ensures the desired state of the cluster by managing Controllers (e.g., Deployment Controller, Node Controller).

4. Etcd:

   • A key-value store that stores the cluster’s state and configuration data.

5. Cloud Controller Manager (Optional):

   • Manages cloud-specific resources like load balancers and storage.

Interaction Flow:

1. User sends a command to the API Server (e.g., kubectl apply).

2. API Server validates and records the request in etcd.

3. Scheduler assigns resources.

4. Controller Manager ensures desired state.

Activity:

Draw a diagram illustrating the flow of a kubectl apply command through the Control Plane components.