02-testing-pod-rescheduling.md

Testing pod rescheduling after draining a worker node

This experiment demonstrates how Kubernetes reschedules pods when a node is drained.

Steps

1. Deploy a test application:

   kubectl create deployment nginx --image=nginx --replicas=3

2. Check pod distribution:

   kubectl get pods -o wide

3. Drain a worker node:

   kubectl drain k3s-worker-1 --ignore-daemonsets --delete-emptydir-data

4. Observe rescheduling:

   kubectl get pods -o wide

5. Uncordon the node:

   kubectl uncordon k3s-worker-1