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A Cloud Guru

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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Path Info

Level

Intermediate

Duration

1h 0m

Published

Mar 31, 2019

Challenge

Identify the broken pods.
Use the following command to see what’s in the cluster:
```
kubectl get all --all-namespaces
```
Challenge

Find out why the pods are broken.
Use the following command to inspect the pod and view the events:
```
kubectl describe pod &lt;pod_name> -n web
```
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
```
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
```

Author

A Cloud Guru

The Cloud Content team comprises subject matter experts hyper focused on services offered by the leading cloud vendors (AWS, GCP, and Azure), as well as cloud-related technologies such as Linux and DevOps. The team is thrilled to share their knowledge to help you build modern tech solutions from the ground up, secure and optimize your environments, and so much more!

What's a lab?

Hands-on Labs are real environments created by industry experts to help you learn. These environments help you gain knowledge and experience, practice without compromising your system, test without risk, destroy without fear, and let you learn from your mistakes. Hands-on Labs: practice your skills before delivering in the real world.