Kubernetes----ClusterIP类型的Service

一、环境准备

编写deployment.yaml文件，内容如下：

apiVersion: v1kind: Namespacemetadata: name: dev---apiVersion: apps/v1kind: Deploymentmetadata: name: pc-deployment namespace: devspec: replicas: 3 selector: matchLabels: app: nginx-pod template: metadata: labels: app: nginx-pod spec: containers: - name: nginx image: nginx:1.17.1 ports: - containerPort: 80

然后使用如下命令创建资源

[root@master service]# kubectl apply -f deployment.yamlnamespace/dev createddeployment.apps/pc-deployment created[root@master service]#

查看创建的资源如下：

[root@master service]# kubectl get deploy,pod -n dev -o wideNAME READY UP-TO-DATE AVAILABLE AGE CONTAINERS IMAGES SELECTORdeployment.apps/pc-deployment 3/3 3 3 69s nginx nginx:1.17.1 app=nginx-podNAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATESpod/pc-deployment-5ffc5bf56c-gvgts 1/1 Running 0 69s 10.244.2.144 node2 pod/pc-deployment-5ffc5bf56c-l6dln 1/1 Running 0 69s 10.244.2.145 node2 pod/pc-deployment-5ffc5bf56c-q2pbn 1/1 Running 0 69s 10.244.1.16 node1 [root@master service]#

二、创建ClusterIP类型的Service

编写cluster_ip.yaml文件，内容如下：

apiVersion: v1kind: Servicemetadata: name: cluster-ip namespace: devspec: selector: app: nginx-pod type: ClusterIP ports: - port: 80 targetPort: 80

使用如下命令创建Service

[root@master service]# kubectl apply -f cluster_ip.yamlservice/cluster-ip created[root@master service]#

通过如下命令查询资源

[root@master service]# kubectl get service,deployment,pod -n dev -o wideNAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE SELECTORservice/cluster-ip ClusterIP 10.110.180.51 80/TCP 20s app=nginx-podNAME READY UP-TO-DATE AVAILABLE AGE CONTAINERS IMAGES SELECTORdeployment.apps/pc-deployment 3/3 3 3 18m nginx nginx:1.17.1 app=nginx-podNAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATESpod/pc-deployment-5ffc5bf56c-gvgts 1/1 Running 0 18m 10.244.2.144 node2 pod/pc-deployment-5ffc5bf56c-l6dln 1/1 Running 0 18m 10.244.2.145 node2 pod/pc-deployment-5ffc5bf56c-q2pbn 1/1 Running 0 18m 10.244.1.16 node1 [root@master service]#

通过如下命令可以查看到创建的Service的更加详细的信息

[root@master service]# kubectl describe service cluster-ip -n devName: cluster-ipNamespace: devLabels: Annotations: Selector: app=nginx-podType: ClusterIPIP Family Policy: SingleStackIP Families: IPv4IP: 10.110.180.51IPs: 10.110.180.51Port: 80/TCPTargetPort: 80/TCPEndpoints: 10.244.1.16:80,10.244.2.144:80,10.244.2.145:80Session Affinity: NoneEvents: [root@master service]#

使用ClusterIP访问nginx服务

[root@master service]# curl 10.110.180.51:80

Welcome to nginx!

If you see this page, the nginx web server is successfully installed andworking. Further configuration is required.

For online documentation and support please refer to