k8s如何给node添加标签(最新推荐)

一、为什么需要标签？

k8s集群如果由大量节点组成，可将节点打上对应的标签，然后通过标签进行筛选及查看,更好的进行资源对象的相关选择与匹配

二、怎么查看目前node上具有的标签

[root@master01 ~]# kubectl get node --show-labels
NAME       STATUS   ROLES                  AGE     VERSION   LABELS
master01   Ready    control-plane,master   3d10h   v1.21.0   beta.kubernetes.io/arch=amd64,beta.kubernetes.io/os=linux,kubernetes.io/arch=amd64,kubernetes.io/hostname=master01,kubernetes.io/os=linux,node-role.kubernetes.io/control-plane=,node-role.kubernetes.io/master=,node.kubernetes.io/exclude-from-external-load-balancers=
worker01   Ready    <none>                 3d9h    v1.21.0   beta.kubernetes.io/arch=amd64,beta.kubernetes.io/os=linux,kubernetes.io/arch=amd64,kubernetes.io/hostname=worker01,kubernetes.io/os=linux,region=huanan
worker02   Ready    <none>                 3d9h    v1.21.0   beta.kubernetes.io/arch=amd64,beta.kubernetes.io/os=linux,kubernetes.io/arch=amd64,kubernetes.io/hostname=worker02,kubernetes.io/os=linux

三、设置节点标签信息

1、设置节点标签

[root@master01 ~]# kubectl label node worker02 region=guanzhou
node/worker02 labeled

2、查看 worker02的标签是否已经设置上

[root@master01 ~]# kubectl get nodes -L region
NAME       STATUS   ROLES                  AGE     VERSION   REGION
master01   Ready    control-plane,master   3d10h   v1.21.0   
worker01   Ready    <none>                 3d9h    v1.21.0   huanan
worker02   Ready    <none>                 3d9h    v1.21.0   guanzhou

 3、多维度标签

 3.1 设置多维度标签

也可以加其它的多维度标签,用于不同的需要区分的场景

如把worker01标签为华南区,A机房,测试环境,游戏业务

[root@master01 ~]# kubectl label node worker01 zone=A env=test bussiness=game
node/worker01 labeled

 3.2  显示节点的相应标签

[root@master01 ~]# kubectl get node -L zone,env
NAME       STATUS   ROLES                  AGE     VERSION   ZONE   ENV
master01   Ready    control-plane,master   3d10h   v1.21.0          
worker01   Ready    <none>                 3d9h    v1.21.0   A      test
worker02   Ready    <none>                 3d9h    v1.21.0  

 四、通过标签来查找node 

4.1 查找env=test的节点

[root@master01 ~]# kubectl get nodes -l env=test --show-labels
NAME       STATUS   ROLES    AGE    VERSION   LABELS
worker01   Ready    <none>   3d9h   v1.21.0   beta.kubernetes.io/arch=amd64,beta.kubernetes.io/os=linux,bussiness=game,env=test,kubernetes.io/arch=amd64,kubernetes.io/hostname=worker01,kubernetes.io/os=linux,region=huanan,zone=A
 

五、修改标签

[root@master01 ~]# kubectl label node worker01 env=prod --overwrite=true
node/worker01 labeled

六、删除node的标签

[root@master01 ~]# kubectl label node worker01 env-
node/worker01 labeled
[root@master01 ~]# kubectl get node -L env
NAME       STATUS   ROLES                  AGE     VERSION   ENV
master01   Ready    control-plane,master   3d10h   v1.21.0   
worker01   Ready    <none>                 3d9h    v1.21.0   
worker02   Ready    <none>                 3d9h    v1.21.0   

七、标签选择器

[root@master01 ~]# kubectl label node worker01 env=test1
node/worker01 labeled
[root@master01 ~]# kubectl label node worker02 env=test2
node/worker02 labeled
[root@master01 ~]# kubectl get node -l 'env in(test1,test2)'
NAME       STATUS   ROLES    AGE    VERSION
worker01   Ready    <none>   3d9h   v1.21.0
worker02   Ready    <none>   3d9h   v1.21.0
[root@master01 ~]# kubectl get node -l 'env in(test1,test2)' --show-labels
NAME       STATUS   ROLES    AGE    VERSION   LABELS
worker01   Ready    <none>   3d9h   v1.21.0   beta.kubernetes.io/arch=amd64,beta.kubernetes.io/os=linux,bussiness=game,env=test1,kubernetes.io/arch=amd64,kubernetes.io/hostname=worker01,kubernetes.io/os=linux,region=huanan,zone=A
worker02   Ready    <none>   3d9h   v1.21.0   beta.kubernetes.io/arch=amd64,beta.kubernetes.io/os=linux,env=test2,kubernetes.io/arch=amd64,kubernetes.io/hostname=worker02,kubernetes.io/os=linux,region=guanzhou

到此这篇关于k8s如何给node添加标签的文章就介绍到这了,更多相关k8s node标签内容请搜索脚本之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持脚本之家！

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