https://kubernetes.io/docs/tutorials/kubernetes-basics/create-cluster/cluster-interactive/
K8s:
minikube start
kubectl run kubernetes-bootcamp --image=docker.io/jocatalin/kubernetes-bootcamp:v1 --port=8080
kubectl get pods
kubectl expose deployment/kubernetes-bootcamp --type="NodePort" --port 8080
kubectl get services：查看pod和节点的的端口映射；
curl minikube:30939
kubectl get deployments # 查看应用副本数；
kubectl scale deployments/kubernetes-bootcamp --replicas=3
kubectl get pods # 查看pod数对应副本数；
kubectl scale deployments/kubernetes-bootcamp --replicas=2
kubectl set image deployments/kubernetes-bootcamp kubernetes-bootcamp=jocatalin/kubernetes-bootcamp:v2
kubectl rollout undo deployments/kubernetes-bootcamp
kubectl get services# 查看应用