K8S标签相关的管理

 

K8S标签相关的管理

标签作用：
    kv格式，对资源进行标签化，通过标签对资源进行关联管理，以松散耦合的方式。通过labels进行定义、结合selector选择器进行管理


标签管理的范围：
[root@k8smaster01 ~]# kubectl label
apiservices.apiregistration.k8s.io                            mutatingwebhookconfigurations.admissionregistration.k8s.io
certificatesigningrequests.certificates.k8s.io                namespaces
clusterrolebindings.rbac.authorization.k8s.io                 networkpolicies.networking.k8s.io
clusterroles.rbac.authorization.k8s.io                        nodes
componentstatuses                                             persistentvolumeclaims
configmaps                                                    persistentvolumes
controllerrevisions.apps                                      poddisruptionbudgets.policy
cronjobs.batch                                                pods
csidrivers.storage.k8s.io                                     podsecuritypolicies.policy
csinodes.storage.k8s.io                                       podtemplates
csistoragecapacities.storage.k8s.io                           priorityclasses.scheduling.k8s.io
customresourcedefinitions.apiextensions.k8s.io                prioritylevelconfigurations.flowcontrol.apiserver.k8s.io
daemonsets.apps                                               replicasets.apps
deployments.apps                                              replicationcontrollers
endpoints                                                     resourcequotas
endpointslices.discovery.k8s.io                               rolebindings.rbac.authorization.k8s.io
events                                                        roles.rbac.authorization.k8s.io
events.events.k8s.io                                          runtimeclasses.node.k8s.io
flowschemas.flowcontrol.apiserver.k8s.io                      secrets
horizontalpodautoscalers.autoscaling                          serviceaccounts
ingressclasses.networking.k8s.io                              services
ingresses.networking.k8s.io                                   statefulsets.apps
jobs.batch                                                    storageclasses.storage.k8s.io
leases.coordination.k8s.io                                    validatingwebhookconfigurations.admissionregistration.k8s.io
limitranges                                                   volumeattachments.storage.k8s.io




增加
    [root@k8smaster01 ~]# kubectl apply -f mysql-pod.yaml
    [root@k8smaster01 ~]# kubectl get pods --show-labels
    NAME           READY   STATUS    RESTARTS   AGE   LABELS
    wp-mysql-pod   1/1     Running   0          5s    <none>
    # 基于pod增加标签
    [root@k8smaster01 ~]# kubectl label pods wp-mysql-pod app=mysql
    pod/wp-mysql-pod labeled
    [root@k8smaster01 ~]# kubectl get all --show-labels
    NAME               READY   STATUS    RESTARTS   AGE   LABELS
    pod/wp-mysql-pod   1/1     Running   0          53s   app=mysql


    # 增加多个标签
    [root@k8smaster01 ~]# kubectl label pods wp-mysql-pod app=mysql8 environment=qa server=db


删除
    [root@k8smaster01 ~]# kubectl get pods --show-labels
    NAME           READY   STATUS    RESTARTS   AGE   LABELS
    wp-mysql-pod   1/1     Running   0          10m   app=mysql8,environment=qa,server=db
    # 删除server标签
    [root@k8smaster01 ~]# kubectl label pods wp-mysql-pod server-
    pod/wp-mysql-pod unlabeled
    [root@k8smaster01 ~]# kubectl get pods --show-labels
    NAME           READY   STATUS    RESTARTS   AGE   LABELS
    wp-mysql-pod   1/1     Running   0          10m   app=mysql8,environment=qa
    # 删除多个标签
    [root@k8smaster01 ~]# kubectl get pods --show-labels
    NAME           READY   STATUS    RESTARTS   AGE   LABELS
    wp-mysql-pod   1/1     Running   0          11m   <none>
    # 基于标签删除
    [root@k8smaster01 ~]# kubectl delete pods -l app=mysql8


修改
    
    # 更新标签
    [root@k8smaster01 ~]# kubectl label pods wp-mysql-pod app=mysql8 --overwrite
    [root@k8smaster01 ~]# kubectl get pods --show-labels
    NAME           READY   STATUS    RESTARTS   AGE     LABELS
    wp-mysql-pod   1/1     Running   0          4m57s   app=mysql8


查询
    [root@k8smaster01 ~]# kubectl get all --show-labels
    [root@k8smaster01 ~]# kubectl get pods --show-labels
    [root@k8smaster01 ~]# kubectl get nodes --show-labels