Kubectl

https://kubernetes.io/docs/concepts/workloads/controllers/deployment/
进入pod的bash:

kubectl exec -ti <podname> -n <namespace> -- bash

scale pods：
kubectl scale --replicas 5 deployment <deploymentname> -n <namespace>

查看deployment历史

kubectl rollout history deployment <deploymentname> -n<namespace> [--revision=2]

回滚deployment
kubectl rollout undo deployment <deploymentname> -n <namespace> [--to-revision=2]