Kubernetes Cheatsheet

Useful Links

The most complete reference :

Get information about all running pods:
```
kubectl get pods
```
get pods, and also show labels attached to those pods
```
kubectl get pods --show-labels
```
Get all pods on all namespaces
```
kubectl get pods --all-namespaces
```
Describe one pod
```
kubectl describe pod <pod> 
```

Expose the port of a pod (creates a new service)

kubectl expose pod <pod> --port=444 --name=frontend

Port forward the exposed pod port to your local machine
```
kubectl port-forward <pod> 8080
```
Attach to the pod
```
kubectl attach <podname> -i
```
Execute a command on the pod
```
kubectl exec <pod> -- command
```

Add a new label to a pod

kubectl label pods <pod> mylabel=awesome

Run a shell in a pod - very useful for debugging

kubectl run -i --tty busybox --image=busybox --restart=Never -- sh

Get deployment status

kubectl rollout status deployment/helloworld-deployment

Run k8s-demo with the image label version 2

kubectl set image deployment/helloworld-deployment k8s-demo=k8s-demo:2

Edit the deployment object

kubectl edit deployment/helloworld-deployment

Get the status of the rollout

kubectl rollout status deployment/helloworld-deployment

Get the rollout history

kubectl rollout history deployment/helloworld-deployment

Rollback to previous version

kubectl rollout undo deployment/helloworld-deployment

Rollback to any version version

kubectl rollout undo deployment/helloworld-deployment --to-revision=n