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Repairing Failed Pods in Kubernetes

As a Kubernetes Administrator, you will come across broken pods. Being able to identify the issue and quickly fix the pods is essential to maintaining uptime for your applications running in Kubernetes. In this hands-on lab, you will be presented with a number of broken pods. You must identify the problem and take the quickest route to resolve the problem in order to get your cluster back up and running.

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Lab platform
Lab Info
Level
Intermediate
Last updated
Sep 06, 2025
Duration
1h 0m

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Table of Contents
  1. Challenge

    Identify the broken pods.

    Use the following command to see what’s in the cluster:

    kubectl get all --all-namespaces
    
  2. Challenge

    Find out why the pods are broken.

    Use the following command to inspect the pod and view the events:

    kubectl describe pod <pod_name> -n web
    
  3. Challenge

    Repair the broken pods.
    1. Use the following command to repair the broken pods in the most efficient manner:

      kubectl edit deploy nginx -n web
      
    2. Where it says image: nginx:191, change it to image: nginx. Save and exit.

    3. Verify the repair is complete:

      kubectl get po -n web
      
    4. See the new replica set:

      kubectl get rs -n web
      
  4. Challenge

    Ensure pod health by accessing the pod directly.
    1. List the pods including the IP addresses:

      kubectl get po -n web -o wide
      
    2. Start a busybox pod:

      kubectl run busybox --image=busybox --rm -it --restart=Never -- sh
      
    3. Use the following command to access the pod directly via its container port, replacing POD_IP_ADDRESS with an appropriate pod IP:

      wget -qO- POD_IP_ADDRESS:80
      
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