# java

**Repository Path**: xuxiaowei-com-cn/java

## Basic Information

- **Project Name**: java
- **Description**: 一个 java 项目，用于测试 Docker、k8s 等等
- **Primary Language**: Unknown
- **License**: Apache-2.0
- **Default Branch**: main
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 1
- **Forks**: 2
- **Created**: 2023-10-12
- **Last Updated**: 2025-03-14

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

## 使用说明

- ***本文以局域网为例（公网环境可获取用户真实公网IP，已通过测试）***
- 使用 java 程序测试是否能获取到用户真实 IP
    - 包含 docker 环境
    - 包含 kubernetes Ingress 环境

1. docker 环境

   ```shell
   docker run \
     --restart=always \
     -itd \
     --privileged=true \
     --name java-0.0.1-SNAPSHOT \
     -p 63456:8080 \
     registry.cn-qingdao.aliyuncs.com/xuxiaoweicomcn/java:0.0.1-SNAPSHOT
   ```

   测试示例

    ```shell
    C:\Users\xuxiaowei>curl http://172.25.25.221:63456
    {"remoteHost":"172.25.25.4","headerNames":{"host":["172.25.25.221:63456"],"user-agent":["curl/8.0.1"],"accept":["*/*"]},"remotePort":53580,"remoteAddr":"172.25.25.4"}
    C:\Users\xuxiaowei>
    C:\Users\xuxiaowei>ipconfig
    
    Windows IP 配置
    
    
    以太网适配器 以太网:
    
       连接特定的 DNS 后缀 . . . . . . . :
       IPv4 地址 . . . . . . . . . . . . : 172.25.25.4
       子网掩码  . . . . . . . . . . . . : 255.255.255.0
       默认网关. . . . . . . . . . . . . : fe80::1%3
                                           172.25.25.1
    
    C:\Users\xuxiaowei>
    ```

2. kubernetes（k8s） Service 环境（不推荐）

   [保留客户端源 IP（不推荐）](https://kubernetes.io/zh-cn/docs/tasks/access-application-cluster/create-external-load-balancer/#preserving-the-client-source-ip)

   ***需要访问pod部署节点的IP，而不是集群的任意节点IP***

    ```shell
    kubectl apply -f https://gitee.com/xuxiaowei-com-cn/java/raw/main/deploy/deploy-service.yaml
    ```

    ```shell
    [root@k8s-control-plane-1 java]# kubectl get service java-resp-1-service 
    NAME                  TYPE       CLUSTER-IP     EXTERNAL-IP   PORT(S)          AGE
    java-resp-1-service   NodePort   10.108.23.26   <none>        8080:30780/TCP   9h
    [root@k8s-control-plane-1 java]#
    ```

    ```shell
    C:\Users\xuxiaowei>curl 172.25.25.220:30780
    {"remoteHost":"172.25.25.4","headerNames":{"host":["172.25.25.220:30780"],"user-agent":["curl/8.0.1"],"accept":["*/*"]},"remotePort":57906,"remoteAddr":"172.25.25.4"}
    C:\Users\xuxiaowei>
    C:\Users\xuxiaowei>ipconfig
    
    Windows IP 配置
    
    
    以太网适配器 以太网:
    
       连接特定的 DNS 后缀 . . . . . . . :
       IPv4 地址 . . . . . . . . . . . . : 172.25.25.4
       子网掩码  . . . . . . . . . . . . : 255.255.255.0
       默认网关. . . . . . . . . . . . . : fe80::1%3
                                           172.25.25.1
    
    C:\Users\xuxiaowei>
    ```

3. kubernetes（k8s） Nginx Ingress 环境（推荐）

    ```shell
    kubectl apply -f https://gitee.com/xuxiaowei-com-cn/java/raw/main/deploy/deploy-service-ingress.yaml
    ```

    ```shell
    [root@k8s-control-plane-1 ~]# kubectl get ingress java-resp-2-localhost
    NAME                    CLASS   HOSTS                     ADDRESS   PORTS   AGE
    java-resp-2-localhost   nginx   java.resp-2.localdev.me             80      8h
    [root@k8s-control-plane-1 ~]#
    ```

    ```shell
    C:\Users\xuxiaowei>curl --resolve java.resp-2.localdev.me:80:172.25.25.220 http://java.resp-2.localdev.me
    {"remoteHost":"172.25.25.4","X-Request-ID":["59fe194f72c4d6aec891f4b7d8bbc2ea"],"headerNames":{"x-request-id":["59fe194f72c4d6aec891f4b7d8bbc2ea"],"x-real-ip":["172.25.25.4"],"x-forwarded-scheme":["http"],"x-forwarded-host":["java.resp-2.localdev.me"],"x-forwarded-proto":["http"],"host":["java.resp-2.localdev.me"],"x-forwarded-port":["80"],"x-scheme":["http"],"user-agent":["curl/8.0.1"],"accept":["*/*"]},"remotePort":49254,"X-Forwarded-Host":["java.resp-2.localdev.me"],"X-Forwarded-Proto":["http"],"X-Forwarded-Port":["80"],"X-Forwarded-Scheme":["http"],"X-Real-Ip":["172.25.25.4"],"remoteAddr":"172.25.25.4","X-Scheme":["http"]}
    C:\Users\xuxiaowei>
    C:\Users\xuxiaowei>ipconfig
    
    Windows IP 配置
    
    
    以太网适配器 以太网:
    
       连接特定的 DNS 后缀 . . . . . . . :
       IPv4 地址 . . . . . . . . . . . . : 172.25.25.4
       子网掩码  . . . . . . . . . . . . : 255.255.255.0
       默认网关. . . . . . . . . . . . . : fe80::1%3
                                           172.25.25.1
    
    C:\Users\xuxiaowei>
    ```