kubernetesPod驱逐迁移drain⽤法
example
设置node不可调度
$kubectl cordon 172.16.21.26$ kubectl drain foo --force
$ kubectl drain foo --grace-period=900
$ kubectl drain 172.16.21.26 --delete-local-data --ignore-daemonsets --force
参数说明：
–delete-local-data: 即使pod使⽤了emptyDir也删除
–ignore-daemonsets: 忽略deamonset控制器的pod，如果不忽略，deamonset控制器控制的pod被删除后可能马上⼜在此节点上启动起来,会成为死循环；
–force: 不加force参数只会删除该NODE上由ReplicationController, ReplicaSet, DaemonSet,StatefulSet or Job创建的Pod，加了后还会删除’裸奔的pod’(没有绑定到任何replication controller)--pod-selector=\"\" Label selector to filter pods on the node;按标签过滤掉不驱逐得pod-l, --selector=\"\" Selector (label query) to filter on
--skip-wait-for-delete-timeout=0 If pod DeletionTimestamp older than N seconds, skip waiting for the pod. Seconds must be greater than 0 to skip.--timeout=0s The length of time to wait before giving up, zero means infinite
观察pod重建情况后，对节点进⾏维护操作。维护结束后对节点重新配置可以调度。
kubectl uncordon 172.16.21.26
[root@host131 Pod]# time -p kubectl delete pod testbox --grace-period=0 //--grace-period延时删除，以免带来⼀定的⿇烦pod \"testbox\" deletedreal 8.08user 0.10sys 0.03
[root@host131 Pod]#
