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# 一、配置Pod的端口配置
## 1.1 编写yaml文件
编写 pod_ports.yaml文件，内容如下，设置port的name和containerPort，如下
```yaml
apiVersion: v1
kind: Namespace
metadata:
  name: dev

---

apiVersion: v1
kind: Pod
metadata:
  name: pod-ports
  namespace: dev
  labels:
    user: redrose2100
spec:
  containers:
  - name: nginx
    image: nginx:1.17.1
    ports:
    - containerPort: 80
      name: nginx-port
      protocol: TCP
```
## 1.2 创建资源
使用如下命令创建资源
```bash
[root@master pod]# kubectl apply -f pod_ports.yaml
namespace/dev created
pod/pod-ports created
[root@master pod]# 
```
## 1.3 查看Pod的IP和端口等信息
使用如下命令可以查看到ip和端口
```bash
[root@master pod]# kubectl get pod -n dev -o wide
NAME        READY   STATUS    RESTARTS   AGE   IP            NODE    NOMINATED NODE   READINESS GATES
pod-ports   1/1     Running   0          3m    10.244.2.36   node2   <none>           <none>
[root@master pod]# kubectl describe pod pod-ports -n dev
Name:         pod-ports
Namespace:    dev
Priority:     0
Node:         node2/192.168.16.42
Start Time:   Tue, 22 Mar 2022 00:55:03 +0800
Labels:       user=redrose2100
Annotations:  <none>
Status:       Running
IP:           10.244.2.36
IPs:
  IP:  10.244.2.36
Containers:
  nginx:
    Container ID:   docker://b3514575830f43fdedf27a2ed784f52c41183b22a7cd2050fad361ce0802ef41
    Image:          nginx:1.17.1
    Image ID:       docker-pullable://nginx@sha256:b4b9b3eee194703fc2fa8afa5b7510c77ae70cfba567af1376a573a967c03dbb
    Port:           80/TCP
    Host Port:      0/TCP
    State:          Running
      Started:      Tue, 22 Mar 2022 00:55:04 +0800
    Ready:          True
    Restart Count:  0
    Environment:    <none>
    Mounts:
      /var/run/secrets/kubernetes.io/serviceaccount from kube-api-access-9c8z2 (ro)
Conditions:
  Type              Status
  Initialized       True
  Ready             True
  ContainersReady   True
  PodScheduled      True
Volumes:
  kube-api-access-9c8z2:
    Type:                    Projected (a volume that contains injected data from multiple sources)
    TokenExpirationSeconds:  3607
    ConfigMapName:           kube-root-ca.crt
    ConfigMapOptional:       <nil>
    DownwardAPI:             true
QoS Class:                   BestEffort
Node-Selectors:              <none>
Tolerations:                 node.kubernetes.io/not-ready:NoExecute op=Exists for 300s
                             node.kubernetes.io/unreachable:NoExecute op=Exists for 300s
Events:
  Type    Reason     Age   From               Message
  ----    ------     ----  ----               -------
  Normal  Scheduled  3m8s  default-scheduler  Successfully assigned dev/pod-ports to node2
  Normal  Pulled     3m7s  kubelet            Container image "nginx:1.17.1" already present on machine
  Normal  Created    3m7s  kubelet            Created container nginx
  Normal  Started    3m7s  kubelet            Started container nginx
[root@master pod]#
```
## 1.4 使用IP和端口验证
在集群环境中使用ip+port访问nginx，如下，即能正确访问nginx
```bash
[root@master pod]# curl 10.244.2.36:80
<!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 pod]#
```

## 1.5 删除资源
使用如下命令删除资源
```bash
[root@master pod]# kubectl delete -f pod_ports.yaml
namespace "dev" deleted
pod "pod-ports" deleted
[root@master pod]#
```

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