Troubleshooting Tips Per Topic

CKA Tips

• In this section we’ll provide some tips on how troubleshoot issues based on CKA topics.

General Tips

1. Use tail and grep to follow the logs real time.
2. Always make a copy of the any files before modifying.
3. Set up the environment before starting the exam

alias k=kubectl                         # will already be pre-configured

export do="--dry-run=client -o yaml"    # k create deploy nginx --image=nginx $do

export now="--force --grace-period 0"   # k delete pod x $now

Apiserver Crash/Misconfiguration

File	Location
Configuration	/etc/kubernetes/manifests/kube-apiserver.yaml
Logs	/var/log/pods
	/var/log/containers
	crictl ps and crictl logs <containerid>
	docker ps and docker ps <containerid>
Kubelet Config	/var/lib/kubelet/
Kubelet Logs	/var/log/syslog or journalctl

systemctl commands

Command	Description
systemctl cat <service_name>	To check the service configuration