Nginx 负载均衡器异常

Question

我有一个 Nginx，后面有 2 个服务器（90% 和 10% 负载平衡），我在其中发送请求。配置如下：

   upstream https://upstream-stage.infra.com/ {
    ip_hash;
    server oldserver-stage.infra.com weight=9 max_fails=3 fail_timeout=30s;
    server newserver-stage.infra.com weight=1 max_fails=3 fail_timeout=30s;
    }

server {
    server_name upstream-nginx-stage.infra.com www.upstream-nginx-stage.infra.com;
    return 301 https://upstream-nginx-stage.infra.com$request_uri;
}

server {
    listen 443 ssl;
    ssl_certificate         /etc/nginx/ssl/wild.infra.com.crt;
    ssl_certificate_key     /etc/nginx/ssl/wild.infra.com.key;
    server_name www.upstream-nginx-stage.infra.com;
    return 301 https://upstream-nginx-stage.infra.com$request_uri;
}

server {
    listen 443 ssl;
    ssl_certificate         /etc/nginx/ssl/wild.infra.com.crt;
    ssl_certificate_key     /etc/nginx/ssl/wild.infra.com.key;
    server_name upstream-nginx-stage.infra.com;

location / {


    proxy_pass https://upstream-stage.infra.com/;
    proxy_set_header Host $host;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header X-Real-IP $remote_addr;
    }
}

我的问题是 - 如何在此配置中设置例外以始终按以下方式发送请求而无需任何负载平衡：

upstream-nginx-stage.infra.com/exception1PDF/... => oldserver-stage.infra.com

upstream-nginx-stage.infra.com/exception2/... => newserver-stage.infra.com

upstream-nginx-stage.infra.com/someAPIrequest#/... => APIPublicApp.azurewebsites.net (standalone and completelly different site)

Answer 1

 upstream old_server {
   ip_hash;
   server oldserver-stage.infra.com weight=9 max_fails=3 fail_timeout=30s;
 }

 upstream new_server {
   ip_hash;
   server newserver-stage.infra.com weight=9 max_fails=3 fail_timeout=30s;
 }

 upstream azure_server {
   ip_hash;
   server azure_app.infra.com weight=9 max_fails=3 fail_timeout=30s;
 }

 server {
   [configs]

   location / {
     proxy_pass https://upstream-stage.infra.com/;
     proxy_set_header Host $host;
     proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
     proxy_set_header X-Real-IP $remote_addr;
   }

   location /exception1PDF {
     proxy_pass https://old_server;
     proxy_set_header Host $host;
     proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
     proxy_set_header X-Real-IP $remote_addr;
   }

   location /exception2 {
     proxy_pass https://new_server;
     proxy_set_header Host $host;   
     proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
     proxy_set_header X-Real-IP $remote_addr;
   }

   location /someAPIrequest# {
     proxy_pass https://azure_server;
     proxy_set_header Host $host;   # Or you can set the Host configured in the server_name of the backend server, it depends of the configuration of the backend
     proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
     proxy_set_header X-Real-IP $remote_addr;
   }

 }

特定于 Azure，您可以使用类似的其他方法：

    location /someAPIrequest# {
      proxy_pass https://apipublicapp.azurewebsites.net;
      proxy_set_header Host "apipublicapp.azurewebsites.net";
      proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
      proxy_set_header X-Real-IP $remote_addr;
    }