k8s查询指定app的pod-name、查看pod log 删除pod

1、查看service的appname

[root@k8s-master ~]# kubectl get service -n rkw-ezc-test -o wide 
NAME                                             TYPE       CLUSTER-IP      EXTERNAL-IP   PORT(S)           AGE     SELECTOR
chinapopin-apply-vsitregist-application-test     NodePort   10.96.235.105   <none>        8092:32208/TCP    434d    app=chinapopin-apply-vsitregist-application-test
chinapopin-platform-address-application-test     NodePort   10.96.99.208    <none>        8071:31583/TCP    434d    app=chinapopin-platform-address-application-test

2、根据app name获取pod

[root@k8s-master ~]# kubectl get service -n rkw-ezc-test -l app=notice-shortmsg-test
NAME                   TYPE       CLUSTER-IP     EXTERNAL-IP   PORT(S)          AGE
notice-shortmsg-test   NodePort   10.96.96.221   <none>        8078:30631/TCP   6d22h
[root@k8s-master ~]# kubectl get pod -n rkw-ezc-test -l app=notice-shortmsg-test
NAME                                           READY   STATUS    RESTARTS   AGE
notice-shortmsg-test-gb2w91-5f55794f9b-8zb44   1/1     Running   0          6d4h

3、使用json方式获取pod的name （如果多个需要修改item的指针）

[root@k8s-master ~]# kubectl get pod -n rkw-ezc-test -l app=notice-shortmsg-test -o jsonpath='{.items[0].metadata.name}'
notice-shortmsg-test-gb2w91-5f55794f9b-8zb44

4、如果要显示全部的pod名称 使用* 代替角标

[root@k8s-master ~]# kubectl get pod -n kubesphere-monitoring-system -l app=node-exporter -o jsonpath='{.items[*].metadata.name}'
node-exporter-b5pvs node-exporter-bxk2h node-exporter-h9kmd node-exporter-l4cb2

5、直接删除某个名称的所有pod

# 删除所有带有lable name=myLabel的pod和service
$ kubectl delete pods,services -l name=myLabel
[root@k8s-master ~]# kubectl delete pod -n zhxq3-test -l app=community-manager-login
pod "community-manager-login-gucvi3-6f8bd995f8-l6vtm" deleted
[root@k8s-master ~]# kubectl get pod -n zhxq3-test -l app=community-manager-login
NAME                                              READY   STATUS    RESTARTS   AGE
community-manager-login-gucvi3-6f8bd995f8-6srfx   1/1     Running   0          9s

6、查询事件 （常用命令）

kubectl get events --all-namespaces

7、多个pod如何查询全部日志

kubectl logs -f --tail=100 -n chinapopin-system-prod -l  app=chinapopin-biz-student