Kubernetes Cheat Sheet

Cheetsheet for K8s with popular cli commands

What isKubernetes?

  • Kubernetes is a platform for managing containerized workloads.
  • Kubernetes orchestrates computing, networking and storage to provide a seamless portability across infrastructure providers.

Cluster Info

List all services

 kubectl get services

List all pods

kubectl get pods

Watch nodes continuously

kubectl get nodes -w

Get version information

kubectl version

Get cluster information

kubectl cluster-info

Get the configuration

kubectl config view

Output information about a node

kubectl describe node <node>

Pod and Container Info

List the current pods

kubectl get pods

Describe pod 

kubectl describe pod <name>

List the replication controllers

kubectl get rc

List the replication controllers in 

kubectl get rc --namespace="<namespace>"

Describe replication controller 

kubectl describe rc <name>

List the services

kubectl get svc

Describe service 

kubectl describe svc <name>

Interacting with Pods

Launch a pod called using image 

 kubectl run <name> --image=<image-name>

Create a service described in 

 kubectl create -f <manifest.yaml>

Scale replication controller to instances

 kubectl scale --replicas=<count> rc <name>

Map port to port on replication controller 

 kubectl expose rc <name> --port=<external> --target-port=<internal>

Stopping Kubernetes

Delete pod 

kubectl delete pod <name>

Delete replication controller 

kubectl delete rc <name>

Delete service 

kubectl delete svc <name>

Stop all pods on 

kubectl drain <n> --delete-local-data --force --ignore-daemonsets

Remove from the cluster

kubectl delete node <name>

Debugging

execute on selecting container <$container>

kubectl exec <service> <command> [-c <$container>]

Get logs from service selecting container <$container>

kubectl logs -f <name> [-c <$container>]

Watch the Kublet logs

watch -n 2 cat /var/log/kublet.log

Show metrics for nodes

kubectl top node

Show metrics for pods

kubectl top pod

Administration

Initialize your master node

kubeadm init

Join a node to your Kubernetes cluster

kubeadm join --token <token> <master-ip>:<master-port>

Create namespace 

kubectl create namespace <namespace>

Allow Kubernetes master nodes to run pods

kubectl taint nodes --all node-role.kubernetes.io/master-

Reset current state

kubeadm reset

List all secrets

kubectl get secrets

Leave a comment