k8s 修改集群节点的标签

1.增加节点标签 备注 =：代表增加标签

kubectl label nodes node3 node-role.kubernetes.io/node3=

2.减少节点标签 备注 -：代表减少标签

kubectl label nodes node3 node-role.kubernetes.io/node3-

Label添加删除和修改
添加label语法

kubectl label nodes =

删除label语法

kubectl label nodes -

修改Label的值
语法: 需要加上--overwrite参数

kubectl label nodes = --overwrite

查看现有node及label

root@server01:~# kubectl get node --show-labels
NAME STATUS ROLES AGE VERSION LABELS
192.168.174.135 Ready 220d v1.9.0 beta.kubernetes.io/arch=amd64,beta.kubernetes.io/os=linux,kubernetes.io/hostname=192.168.174.135
192.168.174.136 Ready 220d v1.9.0 beta.kubernetes.io/arch=amd64,beta.kubernetes.io/os=linux,kubernetes.io/hostname=192.168.174.136
192.168.174.137 Ready 220d v1.9.0 beta.kubernetes.io/arch=amd64,beta.kubernetes.io/os=linux,kubernetes.io/hostname=192.168.174.137

添加一个key为label-test和value为label-test的label

root@server01:~# kubectl label node 192.168.174.135 label-test=label-test
node "192.168.174.135" labeled

查看是否被添加

root@server01:~# kubectl get node --show-labels
NAME STATUS ROLES AGE VERSION LABELS
192.168.174.135 Ready 220d v1.9.0 beta.kubernetes.io/arch=amd64,beta.kubernetes.io/os=linux,kubernetes.io/hostname=192.168.174.135,label-test=label-test
192.168.174.136 Ready 220d v1.9.0 beta.kubernetes.io/arch=amd64,beta.kubernetes.io/os=linux,kubernetes.io/hostname=192.168.174.136
192.168.174.137 Ready 220d v1.9.0 beta.kubernetes.io/arch=amd64,beta.kubernetes.io/os=linux,kubernetes.io/hostname=192.168.174.137

删除label

root@server01:~# kubectl label node 192.168.174.135 label-test-
node "192.168.174.135" labeled

修改Label的值
语法: 需要加上--overwrite参数

kubectl label nodes = --overwrite
root@server01:~# kubectl label node 192.168.174.135 label_key=label_value
node "192.168.174.135" labeled
root@server01:~#
root@server01:~# kubectl get node --show-labels
NAME STATUS ROLES AGE VERSION LABELS
192.168.174.135 Ready 220d v1.9.0 beta.kubernetes.io/arch=amd64,beta.kubernetes.io/os=linux,kubernetes.io/hostname=192.168.174.135,label_key=label_value
192.168.174.136 Ready 220d v1.9.0 beta.kubernetes.io/arch=amd64,beta.kubernetes.io/os=linux,kubernetes.io/hostname=192.168.174.136
192.168.174.137 Ready 220d v1.9.0 beta.kubernetes.io/arch=amd64,beta.kubernetes.io/os=linux,kubernetes.io/hostname=192.168.174.137
root@server01:~#
root@server01:~# kubectl label node 192.168.174.135 label_key=label_value_update --overwrite
node "192.168.174.135" labeled
root@server01:~#
root@server01:~# kubectl get node --show-labels
NAME STATUS ROLES AGE VERSION LABELS
192.168.174.135 Ready 220d v1.9.0 beta.kubernetes.io/arch=amd64,beta.kubernetes.io/os=linux,kubernetes.io/hostname=192.168.174.135,label_key=label_value_update
192.168.174.136 Ready 220d v1.9.0 beta.kubernetes.io/arch=amd64,beta.kubernetes.io/os=linux,kubernetes.io/hostname=192.168.174.136
192.168.174.137 Ready 220d v1.9.0 beta.kubernetes.io/arch=amd64,beta.kubernetes.io/os=linux,kubernetes.io/hostname=192.168.174.137