Kubernetes Key Concepts:

1. Node:

   • A Node is a single machine (physical or virtual) that runs workloads in Kubernetes.

   • Two types:

     • Control Plane Node: Manages the cluster and schedules workloads.

     • Worker Node: Executes the workloads assigned to it.

2. Pod:

   • The smallest deployable unit in Kubernetes.

   • A Pod can run one or more containers that share storage, network, and specifications.

3. Cluster:

   • A collection of nodes that work together as a unified system.

   • Managed by the Kubernetes Control Plane.

4. Control Plane:

   • Oversees the cluster and handles scheduling, updates, and application health.

   • Components include:

     • API Server: Facilitates communication within the cluster.

     • Controller Manager: Ensures desired cluster states.

     • Scheduler: Allocates workloads to nodes.

Kubernetes Workflow:

1. Define application specifications in YAML files.

2. Deploy the application using kubectl, Kubernetes’ CLI tool.

3. Kubernetes schedules and manages the deployment.

Activity:

Create a diagram that illustrates the relationships between Nodes, Pods, and Clusters. Use arrows to show communication flow.