问题： 

node节点挂了一个， 无法切换到另一个node上


解决：

1、指定了 nodeslector



2、设置了下面：


hostNetwork: true
      dnsPolicy: ClusterFirstWithHostNet


关掉就可以，一般不用这个


报错：

一直处于pending状态

Warning  FailedScheduling  19s (x238 over 20m)  default-scheduler  0/3 nodes are available: 
1 node(s) didn't have free ports for the requested pod ports, 1 node(s) had taints that the pod didn't tolerate, 1 node(s) were not ready,
 1 node(s) were out of disk space.