skipping pod synchronization – PLEG is not healthy: pleg was last seen active 10m31.871843583s ago

报错信息：

Feb 23 11:41:00 node03 kubelet: E0223 11:41:00.213639     786 kubelet.go:1844] skipping pod synchronization - PLEG is not healthy: pleg was last seen active 10m31.871843583s ago; threshold is 3m0s

pod生命周期检查超时，造成node不可用，清除节点中/var/lib/kubelet/pods/目录下的所有数据解决