kubectl rollout status deployment nginx-deploy -n app  # 查看版本升级过程
kubectl rollout history deployment nginx-deploy -n app # 查看版本升级历史
kubectl apply -f http://k8s-yaml.od.com/base_resource/deployment/nginx-v1.15.yaml --record=true  # 升级且记录升级命令
kubectl rollout undo deployment nginx-deploy -n app    # 回滚到上个版本
kubectl rollout undo deployment nginx-deploy --to-revision=3 -n app # 回滚到版本3