Cheat Sheet

This is a small Kubernetes Cheat Sheet with the list of commands and settings I use, almost on a daily basis, when working with kubernetes.

 

Cluster Introspection

Command	Description
kubectl get services	List all services
kubectl get pods	List all pods
kubectl get nodes -w	Watch nodes continuously
kubectl version	Get version information
kubectl cluster-info	Get cluster information
kubectl config view	Get the configuration
kubectl describe node <node>	Output information about a node

Pod and Container Introspection

Command	Description
kubectl get pods	List the current pods
kubectl describe pod <name>	Describe pod
kubectl get rc	List the replication controllers
kubectl get rc --namespace="<namespace>"	List the replication controllers in
ubectl describe rc <name>	Describe replication controller
kubectl get svc	List the services
kubectl describe svc <name>	Describe service

Interacting with Pods

Command	Description
kubectl run <name> --image=<image-name>	Launch a pod called <name> using image <image-name>
kubectl create -f <manifest.yaml>	Create a service described in <manifest.yaml>
kubectl scale --replicas=<count> rc <name>	Scale replication controller <name> to <count> instances
kubectl expose rc <name> --port=<external> --target-port=<internal>	Map port <external> to port <internal> on replication controller <name>

Stopping Kubernetes

Command	Description
kubectl delete pod <name>	Delete pod
kubectl delete rc <name>	Delete replication controller
kubectl delete svc <name>	Delete service
kubectl drain <n> --delete-local-data --force --ignore-daemonsets	Stop all pods on
kubectl delete node <name>	Remove from the cluster

Debugging

Command	Description
kubectl exec <service> <command> [-c <$container>]	execute on , optionally selecting container <$container>
kubectl logs -f <name> [-c <$container>]	Get logs from service , optionally selecting container <$container>
watch -n 2 cat /var/log/kublet.log	Watch the Kublet logs
kubectl top node	Show metrics for nodes
kubectl top pod	Show metrics for pods

Administration

Command	Description
kubeadm init	Initialize your master node
kubeadm join --token <token> <master-ip>:<master-port>	Join a node to your Kubernetes cluster
kubectl create namespace <namespace>	Create namespace
kubectl taint nodes --all node-role.kubernetes.io/master-	Allow Kubernetes master nodes to run pods
kubeadm reset	Reset current state
kubectl get secrets	List all secrets