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# 一、环境准备
编写deployment.yaml文件，内容如下：
```yaml
apiVersion: v1
kind: Namespace
metadata:
  name: dev

---

apiVersion: apps/v1
kind: Deployment
metadata:
  name: pc-deployment
  namespace: dev
spec:
  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
```bash
[root@master service]# kubectl apply -f deployment.yaml
namespace/dev created
deployment.apps/pc-deployment created
[root@master service]#
```
查看创建的资源如下：
```bash
[root@master service]# kubectl get deploy,pod -n dev -o wide
NAME                            READY   UP-TO-DATE   AVAILABLE   AGE   CONTAINERS   IMAGES         SELECTOR
deployment.apps/pc-deployment   3/3     3            3           69s   nginx        nginx:1.17.1   app=nginx-pod

NAME                                 READY   STATUS    RESTARTS   AGE   IP             NODE    NOMINATED NODE   READINESS GATES
pod/pc-deployment-5ffc5bf56c-gvgts   1/1     Running   0          69s   10.244.2.144   node2   <none>           <none>
pod/pc-deployment-5ffc5bf56c-l6dln   1/1     Running   0          69s   10.244.2.145   node2   <none>           <none>
pod/pc-deployment-5ffc5bf56c-q2pbn   1/1     Running   0          69s   10.244.1.16    node1   <none>           <none>
[root@master service]#
```
# 二、创建ClusterIP类型的Service
编写cluster_ip.yaml文件，内容如下：
```yaml
apiVersion: v1
kind: Service
metadata:
  name: cluster-ip
  namespace: dev
spec:
  selector:
    app: nginx-pod
  type: ClusterIP
  ports:
  - port: 80
    targetPort: 80
```
使用如下命令创建Service
```bash
[root@master service]# kubectl apply -f cluster_ip.yaml
service/cluster-ip created
[root@master service]#
```
通过如下命令查询资源
```bash
[root@master service]# kubectl get service,deployment,pod -n dev -o wide
NAME                 TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)   AGE   SELECTOR
service/cluster-ip   ClusterIP   10.110.180.51   <none>        80/TCP    20s   app=nginx-pod

NAME                            READY   UP-TO-DATE   AVAILABLE   AGE   CONTAINERS   IMAGES         SELECTOR
deployment.apps/pc-deployment   3/3     3            3           18m   nginx        nginx:1.17.1   app=nginx-pod

NAME                                 READY   STATUS    RESTARTS   AGE   IP             NODE    NOMINATED NODE   READINESS GATES
pod/pc-deployment-5ffc5bf56c-gvgts   1/1     Running   0          18m   10.244.2.144   node2   <none>           <none>
pod/pc-deployment-5ffc5bf56c-l6dln   1/1     Running   0          18m   10.244.2.145   node2   <none>           <none>
pod/pc-deployment-5ffc5bf56c-q2pbn   1/1     Running   0          18m   10.244.1.16    node1   <none>           <none>
[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
```bash
[root@master service]# kubectl describe service cluster-ip -n dev
Name:              cluster-ip
Namespace:         dev
Labels:            <none>
Annotations:       <none>
Selector:          app=nginx-pod
Type:              ClusterIP
IP Family Policy:  SingleStack
IP Families:       IPv4
IP:                10.110.180.51
IPs:               10.110.180.51
Port:              <unset>  80/TCP
TargetPort:        80/TCP
Endpoints:         10.244.1.16:80,10.244.2.144:80,10.244.2.145:80
Session Affinity:  None
Events:            <none>
[root@master service]#
```
使用ClusterIP访问nginx服务
```bash
[root@master service]# curl 10.110.180.51:80
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
    body {
        width: 35em;
        margin: 0 auto;
        font-family: Tahoma, Verdana, Arial, sans-serif;
    }
</style>
</head>
<body>
<h1>Welcome to nginx!</h1>
<p>If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.</p>

<p>For online documentation and support please refer to
<a href="http://nginx.org/">nginx.org</a>.<br/>
Commercial support is available at
<a href="http://nginx.com/">nginx.com</a>.</p>

<p><em>Thank you for using nginx.</em></p>
</body>
</html>
[root@master service]#
```
# 三、删除资源
使用如下命令删除即可
```bash
[root@master service]# kubectl delete -f cluster_ip.yaml
service "cluster-ip" deleted
[root@master service]# kubectl delete -f deployment.yaml
namespace "dev" deleted
deployment.apps "pc-deployment" deleted
[root@master service]#
```

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