k8s 常用命令

K8S命令
http://kubernetes.io/docs/user-guide/kubectl-overview/

//列出POD
[root@localhost vCN]# kubectl get pods


//列出复制的副本
[root@localhost vCN]# kubectl  get replicationcontroller



//列出复制品
[root@localhost vCN]# kubectl get rc


//列出POD的描述，这里可以看到与docker的对应关系
[root@localhost vCN]# kubectl describe pod cnsend


//services是Kubernetes最外围的单元，通过虚拟一个访问IP及服务端口，
可以访问我们定义好的Pod资源，目前的版本是通过iptables的nat转发来实现，转发的目标端口为Kube_proxy生成的随机端口
//列出服务
[root@localhost vCN]# kubectl get svc
NAME                  LABELS                                    SELECTOR      IP(S)           PORT(S)
as-service-nodeport   <none>                                    name=as       10.254.38.46    4000/TCP
cnquery               app=cnquery                               app=cnquery   10.254.42.29    8080/TCP
cnreceiver            app=cnreceiver                            app=cnrcv     10.254.183.55   10010/TCP
kubernetes            component=apiserver,provider=kubernetes   <none>        10.254.0.1      443/TCP
msb-rc                name=msb-rc                               name=msb-rc   10.254.81.154   10080/TCP
mysql                 app=mysql                                 app=mysql     10.254.100.45   32768/TCP


//获取服务的描述
[root@localhost ~]# kubectl describe service fmadapter-sv-np


kubectl describe pod fm-adapter-controller-r9yb9
kubectl describe service fmadapter-sv-np

//创建以及删除服务
kubectl create -f mysql-controller.json
kubectl delete -f mysql-controller.json

//在容器中运行命令
kubectl exec cnsend-kg0es env

//打印在POD中的容器的日志
kubectl logs busybox -c busybox1


//rc与pod的关联
kubectl describe pod 30166149-810b-4f4b-8a21-0ae4a4c0bcdf-1-6q0ur --namespace="xxx"
ubuntu@default-np234:~$ kubectl describe pod 30166149-810b-4f4b-8a21-0ae4a4c0bcdf-1-6q0ur --namespace="xxx"

通过 Labels:

//得到rc
kubectl get rc --namespace=xxx -o wide
NAME                                     DESIRED   CURRENT   AGE       CONTAINER(S)        IMAGE(S)                                            SELECTOR

SELECTOR 的值与前面的labels一致。

//删除pod
kubectl delete rc xxxxxxx --namespace=xxx



//k8s RESTFUL接口
http://10.43.39.11:8080/api/v1/namespaces/default/replicationcontrollers
http://10.43.39.11:8080/api/v1/namespaces/default/replicationcontrollers/fm-adapter-controller


http://10.43.39.11:8080/api/v1/namespaces/default/pods
http://10.43.39.11:8080/api/v1/namespaces/default/pods/fm-adapter-controller-7porr

http://10.43.39.11:8080/api/v1/nodes
http://10.43.39.11:8080/api/v1/nodes/10.43.39.12

http://10.43.39.11:8080/api/v1/pods
http://10.43.39.11:8080/api/v1/replicationcontrollers
http://10.43.39.11:8080/api/v1/services