给k8s集群中的node节点加标签

 

 

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 <node-name> <label-key>=<label-value> 

 

删除label语法

kubectl label nodes <node-name> <label-key>-

 

修改Label的值
语法: 需要加上--overwrite参数

kubectl label nodes <node-name> <label-key>=<label-value> --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     <none>    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     <none>    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     <none>    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     <none>    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     <none>    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     <none>    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 <node-name> <label-key>=<label-value> --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     <none>    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     <none>    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     <none>    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     <none>    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     <none>    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     <none>    220d      v1.9.0    beta.kubernetes.io/arch=amd64,beta.kubernetes.io/os=linux,kubernetes.io/hostname=192.168.174.137
root@server01:~#