Overview:

High availability ensures continuous operation of your applications and cluster.

Key Concepts:

1. Control Plane Redundancy:

   • Run multiple instances of the API Server, Controller Manager, and Scheduler.

2. Node Availability:

   • Distribute workloads across multiple nodes.

3. Load Balancing:

   • Use Kubernetes services (e.g., LoadBalancer, NodePort) to distribute traffic.

Example High Availability Setup:

• Configure a Deployment with multiple replicas and a LoadBalancer service:

  apiVersion: v1
  kind: Service
  metadata:
    name: my-app
  spec:
    type: LoadBalancer
    selector:
      app: my-app
    ports:
    - protocol: TCP
      port: 80
      targetPort: 8080

Activity:

Set up a multi-replica Deployment with a LoadBalancer service and validate traffic distribution.