Once you start working with Kubernetes, and you deployed some applications to a cluster, you may have encountered issues where the application has not been deployed correctly or is not working as it should. In this webinar, we will explain the different statuses and error messages, and offer troubleshooting tips to resolve such situations swiftly!

1. 5 Simple Tips for Troubleshooting Your
Kubernetes Pods
GUY SALTON

2. Guy
Salton
Solutions Architect
guy.salton@codefresh.io

3. Agenda
● 5 tips to troubleshoot pod failure
● Common reasons pods fail (+demos!)
● Summary
● Why Pods fail in Kubernetes?
https://github.com/guysalton-codefresh/5-tips-troubleshoot-pods

4. Why Pods fail?
1. Startup failure - containers do not start
2. Runtime failure - the application code fails after the container starts up

5. Tip1: Observe Pods
Command: kubectl get pods

6. Tip2: Check Events Related to Pods
Command: kubectl describe pod <pod name>

7. Demo 1:
Debugging ImagePullBackOff Pod

8. Demo 2:
Debugging RunContainerError Pod

9. Demo 3:
Debugging ContainerCreating Pod

10. Demo 4:
Debugging Pending Pods

11. Tip3: Check your logs
Command: kubectl logs pod <pod name>

12. Demo 5:
Debugging CrashLoopBackOff Pod

13. Tip4: Run sh/bash directly in the Pod
Command: kubectl exec -it <pod name>

14. Demo 6:
Run commands inside a Pod

15. Tip5: Show cluster level events
Command: kubectl get events

16. Summary
● If pod didn’t start - kubectl describe it to see
events
● If pod is crashing - kubectl logs to see the
logs
● Need to run commands inside the pod? -
kubectl exec -it

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guy.salton@codefresh.io