kubectl是Kubernetes集群的命令行工具，通过kubectl能够对集群本身进行管理，并能够在集群上进行容器化应用的安装部署。
创建一个pod
`[root@k8s-master ~]# kubectl run nginx --replicas=3 --labels="app=nginx-example" --image=nginx:1.10 --port=80`查看所有资源信息
[root@k8s-master ~]# kubectl get all
NAME READY STATUS RESTARTS AGE
po/nginx-f95d765f9-8b6bp 1/1 Running 0 3m
po/nginx-f95d765f9-cfm6d 1/1 Running 0 3m
po/nginx-f95d765f9-lktk6 1/1 Running 0 3m查看pod的详细信息
[root@k8s-master ~]# kubectl describe po/nginx-f95d765f9-8b6bp
查看创建的pod
[root@k8s-master ~]# kubectl get rs
NAME DESIRED CURRENT READY AGE
nginx-f95d765f9 3 3 3 11m查看创建的pod
[root@k8s-master ~]# kubectl get deploy
NAME DESIRED CURRENT UP-TO-DATE AVAILABLE AGE
nginx 3 3 3 3 13m查看集群
[root@k8s-master ~]# kubectl get cs
\NAME STATUS MESSAGE ERROR
scheduler Healthy ok
controller-manager Healthy ok
etcd-2 Healthy {"health": "true"}
etcd-1 Healthy {"health": "true"}
etcd-0 Healthy {"health": "true"} 查看service
[root@k8s-master ~]# kubectl get svc
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes ClusterIP 10.10.10.1 443/TCP 1d 查看pod的标签
[root@k8s-master ~]# kubectl get pods --show-labels
NAME READY STATUS RESTARTS AGE LABELS
nginx-f95d765f9-8b6bp 1/1 Running 0 19m app=nginx-example,pod-template-hash=951832195
nginx-f95d765f9-cfm6d 1/1 Running 0 19m app=nginx-example,pod-template-hash=951832195
nginx-f95d765f9-lktk6 1/1 Running 0 19m app=nginx-example,pod-template-hash=951832195创建一个pod
[root@k8s-master ~]# kubectl run busybox --image=busybox --command -- ping baidu.com查看指定的标签
[root@k8s-master ~]# kubectl get pods -l run=busybox
NAME READY STATUS RESTARTS AGE
busybox-5d4f595646-dzjv4 1/1 Running 0 4m查看pod分配到哪个节点上
[root@k8s-master ~]# kubectl get pods -o wide
NAME READY STATUS RESTARTS AGE IP NODE
busybox-5d4f595646-dzjv4 1/1 Running 0 5m 172.17.11.4 192.168.30.22
nginx-f95d765f9-8b6bp 1/1 Running 0 27m 172.17.11.2 192.168.30.22
nginx-f95d765f9-cfm6d 1/1 Running 0 27m 172.17.80.2 192.168.30.23
nginx-f95d765f9-lktk6 1/1 Running 0 27m 172.17.11.3 192.168.30.22查看标签并运行了哪些镜像或容器
[root@k8s-master ~]# kubectl get deploy -o wide
NAME DESIRED CURRENT UP-TO-DATE AVAILABLE AGE CONTAINERS IMAGES SELECTOR
busybox 1 1 1 1 8m busybox busybox run=busybox
nginx 3 3 3 3 29m nginx nginx:1.10 app=nginx-example发布并暴露端口使用户可以访问
根据nginx这个标签进行创建[root@k8s-master ~]# kubectl expose deployment nginx --port=88 --type=NodePort --target-port=80 --name=nginx-service
查看标签
[root@k8s-master ~]# kubectl get deploy
NAME DESIRED CURRENT UP-TO-DATE AVAILABLE AGE
busybox 1 1 1 1 14m
nginx 3 3 3 3 36m查看service,端口已经暴露给用户
[root@k8s-master ~]# kubectl get svc
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes ClusterIP 10.10.10.1 443/TCP 1d
nginx-service NodePort 10.10.10.173 88:35442/TCP 1m Node1和node2都可以访问
内部访问
[root@k8s-node1 ~]# curl 10.10.10.173:88
Welcome to nginx!
[root@k8s-node2 ~]# curl 10.10.10.173:88
Welcome to nginx! 用户可通过外部访问我们的应用
访问http://192.168.30.22:35442
访问http://192.168.30.23:35442