使用 map ,测试了一下没问题
```
# 根据请求头 environment_name 映射目标地址
map $http_environment_name $backend {
default http://127.0.0.1:8022/api/; # 默认地址
loc http://127.0.0.1:28080; # loc 的地址
pro http://127.0.0.1:8011/api/; # pro 的地址
}

server {
listen 80;

location /aa {
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $remote_addr;

# 动态选择后端
proxy_pass $backend;
}
}
```

```
~ » cat test_njet.sh 130 ↵ xtcc@xtcc-b560m-power
curl -H "environment-name: " http://127.0.0.1:8089/aa
curl -H "environment-name: ssss" http://127.0.0.1:8089/aa
curl -H "environment-name: loc" http://127.0.0.1:8089/aa
curl -H "environment-name: pro" http://127.0.0.1:8089/aa
```
```
2025/01/13 17:02:01 [error] 238783#0: *1 connect() failed (111: Connection refused) while connecting to upstream, client: 127.0.0.1, server: , request: "GET /aa HTTP/1.1", upstream: "http://127.0.0.1:8022/api/", host: "127.0.0.1:8089"
2025/01/13 17:02:01 [error] 238784#0: *3 connect() failed (111: Connection refused) while connecting to upstream, client: 127.0.0.1, server: , request: "GET /aa HTTP/1.1", upstream: "http://127.0.0.1:8022/api/", host: "127.0.0.1:8089"
2025/01/13 17:02:01 [error] 238785#0: *5 connect() failed (111: Connection refused) while connecting to upstream, client: 127.0.0.1, server: , request: "GET /aa HTTP/1.1", upstream: "http://127.0.0.1:28080/aa", host: "127.0.0.1:8089"
2025/01/13 17:02:01 [error] 238786#0: *7 connect() failed (111: Connection refused) while connecting to upstream, client: 127.0.0.1, server: , request: "GET /aa HTTP/1.1", upstream: "http://127.0.0.1:8011/api/", host: "127.0.0.1:8089"

```

顺便推广一下我们的 njet: https://gitee.com/njet-rd/njet

@xiaoyuan9816 https://www.cac.gov.cn/2024-04/02/c_1713729983803145.htm
有备案吗？ 还用国外 api ？符合 "坚持社会主义核心价值观" 吗？
https://www.cac.gov.cn/2023-07/13/c_1690898327029107.htm

别用 dd 了 麻烦，我推荐使用 Clonezilla 。之前我迁移也是用的这个，有多余硬盘还可以先备份系统

@smallparking 看一下 404 的请求的 error_log 就知道 404 的原因了

@andyfan 不对吧，你这个 location 规则没问题
404 是不是有可能是你的 nginx 文件没有读取权限之类的？

u 盘启动
如果不会就摇人吧

那个 我们公司有个开原的 kic 不确定是不是满足你的需求，可以看看 https://gitee.com/njet-rd/open-njet-kic

会弄的人自然可以偷着弄，但是你需要上来问那就别搞了。有的事可不是技术问题