kubectl explain pod
===========
=============
============
============
============ initc
============就绪检测 readinessProbe
======== record ; scale ; autoscale ;set image ;rollout undo
========== cronjob
=====service
==========
环境变量来自 configmap
命令行参数来自configmap
卷来自configmap
强制出发滚动更新
======secret===
secret用到了 base64加密
解密：
docker registry 认证
========== valume
=========PV
========statefulset
