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Microk8s Kubernetes More Commands for mostly debugging and troubleshooting

Get Kubernetes API​

Ensure the Pod CIDR is consistent across the cluster. Check the API server flags

cat /var/snap/microk8s/current/args/kube-apiserver

Check the CoreDNS configuration​

microk8s kubectl describe configmap -n kube-system coredns

Check if the CNI is working​

microk8s kubectl get pods -n kube-system

Debug CrashLoopBackOff Pods​

microk8s kubectl describe pod -n kube-system coredns-7896dbf49-87b67

Refresh Certificates​

sudo microk8s refresh-certs --cert server.crt

Available certificate options: 'server.crt': refreshes the server certificate 'front-proxy-client.crt': refreshes the front proxy client certificate 'ca.crt': refreshes the root CA and all certificates created from it. Warning: refreshing the root CA requires nodes to leave and re-join the cluster

Inspect cluster​

microk8s inspect
sudo microk8s kubectl config view --raw

Check logs cluster agent​

journalctl -u snap.microk8s.daemon-cluster-agent

Get all Pods info​

microk8s kubectl get pods -A -o wide

Monitoring​

Enabling the Metrics Server in MicroK8s​

microk8s enable metrics-server

Check nodes usage​

microk8s kubectl top nodes

Check pods usage​

microk8s kubectl top pods -A