如何给k8s集群里的资源打标签
IT运维成长笔记 人气:0如何给k8s集群里的资源打标签
给节点添加角色：
k8s集群，节点如果有多个角色，需要标记出来，可以给对应的节点打上标签，方便后续了解节点的功能
命令：kubectl label nodes 节点名字 node-role.kubernetes.io/你想要的roles(=/-)
最后括号里的加减号，减号就是删除roles，等号就是增加roles
更新标签，在打标签命令后面添加参数--overwrite
举例：
给node节点添加角色：
#给node1节点增加jenkins角色 [root@k8s-master1 ~]# kubectl label nodes k8s-node1 node-role.kubernetes.io/jenkins= node/k8s-node1 labeled #给node2节点增加gitlab角色 [root@k8s-master1 ~]# kubectl label nodes k8s-node2 node-role.kubernetes.io/gitlab= node/k8s-node2 labeled #查询节点roles [root@k8s-master1 ~]# kubectl get nodes NAME STATUS ROLES AGE VERSION k8s-master1 Ready master 17d v1.19.4 k8s-node1 Ready jenkins,node 17d v1.19.4 k8s-node2 Ready gitlab,node 14d v1.19.4
给deploymen控制器打标签：
更新标签，在打标签命令后面添加参数--overwrite
#查询标签 [root@k8s-master1 k8s]# kubectl get deploy -n my-ns-kcxm kcxm --show-labels NAME READY UP-TO-DATE AVAILABLE AGE LABELS kcxm 2/2 2 2 8m47s app=kcxm-gc #打标签version=v1 [root@k8s-master1 k8s]# kubectl label deploy -n my-ns-kcxm kcxm version=v1 deployment.apps/kcxm labeled #查询标签 [root@k8s-master1 k8s]# kubectl get deploy -n my-ns-kcxm kcxm --show-labels NAME READY UP-TO-DATE AVAILABLE AGE LABELS kcxm 2/2 2 2 9m19s app=kcxm-gc,version=v1 #更新标签，在打标签命令后面添加参数--overwrite [root@k8s-master1 k8s]# kubectl label deploy -n my-ns-kcxm kcxm version=v2 --overwrite deployment.apps/kcxm labeled #查询标签 [root@k8s-master1 k8s]# kubectl get deploy -n my-ns-kcxm kcxm --show-labels NAME READY UP-TO-DATE AVAILABLE AGE LABELS kcxm 2/2 2 2 13m app=kcxm-gc,version=v2 #删除标签version=v2 [root@k8s-master1 k8s]# kubectl label deploy -n my-ns-kcxm kcxm version- deployment.apps/kcxm labeled #查询标签 [root@k8s-master1 k8s]# kubectl get deploy -n my-ns-kcxm kcxm --show-labels NAME READY UP-TO-DATE AVAILABLE AGE LABELS kcxm 2/2 2 2 9m30s app=kcxm-gc
给pod打标签：
[root@k8s-master1 k8s]# kubectl get pod -n my-ns-kcxm --show-labels NAME READY STATUS RESTARTS AGE LABELS kcxm-84c56f9d5b-595qx 1/1 Running 0 2m42s app=kcxm-gc,pod-template-hash=84c56f9d5b kcxm-84c56f9d5b-6h4w2 1/1 Running 0 2m42s app=kcxm-gc,pod-template-hash=84c56f9d5b #给pod打标签version=1.23.1 [root@k8s-master1 k8s]# kubectl label pod -n my-ns-kcxm kcxm-84c56f9d5b-595qx version=1.23.1 pod/kcxm-84c56f9d5b-595qx labeled #查询标签 [root@k8s-master1 k8s]# kubectl get pod -n my-ns-kcxm --show-labels NAME READY STATUS RESTARTS AGE LABELS kcxm-84c56f9d5b-595qx 1/1 Running 0 3m30s app=kcxm-gc,pod-template-hash=84c56f9d5b,version=1.23.1 kcxm-84c56f9d5b-6h4w2 1/1 Running 0 3m30s app=kcxm-gc,pod-template-hash=84c56f9d5b #给pod删除标签version=1.23.1 [root@k8s-master1 k8s]# kubectl label pod -n my-ns-kcxm kcxm-84c56f9d5b-595qx version- pod/kcxm-84c56f9d5b-595qx labeled #删除标签 [root@k8s-master1 k8s]# kubectl get pod -n my-ns-kcxm --show-labels NAME READY STATUS RESTARTS AGE LABELS kcxm-84c56f9d5b-595qx 1/1 Running 0 4m7s app=kcxm-gc,pod-template-hash=84c56f9d5b kcxm-84c56f9d5b-6h4w2 1/1 Running 0 4m7s app=kcxm-gc,pod-template-hash=84c56f9d5b
补充：k8s kubernetes给node节点添加标签和删除node节点标签
[root@k8s-master ~]# hostname #查看节点名称 k8s-master [root@k8s-master ~]# [root@k8s-master ~]# kubectl get nodes --show-labels #查看节点标签 NAME STATUS ROLES AGE VERSION LABELS k8s-master Ready control-plane 9d v1.26.0 app=master,beta.kubernetes.io/arch=amd64,beta.kubernetes.io/os=linux,kubernetes.io/arch=amd64,kubernetes.io/hostname=k8s-master,kubernetes.io/os=linux,node-role.kubernetes.io/control-plane=,node.kubernetes.io/exclude-from-external-load-balancers= [root@k8s-master ~]# kubectl label nodes k8s-master env=env #给节点添加一个标签env=env node/k8s-master labeled [root@k8s-master ~]# kubectl get nodes --show-labels #再次查看节点标签，确定标签添加上了 NAME STATUS ROLES AGE VERSION LABELS k8s-master Ready control-plane 9d v1.26.0 app=master,beta.kubernetes.io/arch=amd64,beta.kubernetes.io/os=linux,env=env,kubernetes.io/arch=amd64,kubernetes.io/hostname=k8s-master,kubernetes.io/os=linux,node-role.kubernetes.io/control-plane=,node.kubernetes.io/exclude-from-external-load-balancers= [root@k8s-master ~]# kubectl label nodes k8s-master env- #删除节点标签env=env node/k8s-master unlabeled [root@k8s-master ~]# [root@k8s-master ~]# kubectl get nodes --show-labels #再次查看确定标签已经删除了 NAME STATUS ROLES AGE VERSION LABELS k8s-master Ready control-plane 9d v1.26.0 app=master,beta.kubernetes.io/arch=amd64,beta.kubernetes.io/os=linux,kubernetes.io/arch=amd64,kubernetes.io/hostname=k8s-master,kubernetes.io/os=linux,node-role.kubernetes.io/control-plane=,node.kubernetes.io/exclude-from-external-load-balancers= [root@k8s-master ~]#
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