Nginx配置socket.io集群

Nginx配置socket.io集群

最近项目中使用到了socket.io，为了保证系统的稳定性，需要进行集群。使用了nginx完成负载和反向代理。具体配置如下：

worker_processes  1;

events {
    worker_connections  1024;
}

http {
    include       mime.types;
    default_type  application/octet-stream;

    sendfile        on;
    keepalive_timeout  65;

    map $http_x_forwarded_for  $clientRealIp {  

        ""      $remote_addr;
        ~^(?P<firstAddr>[0-9.]+),?.*$  $firstAddr;
    }

    upstream nodes {
        hash  $clientRealIp;
        server localhost:9082;
        server localhost:8082;  
    }

    server {
        listen       80;
        server_name  localhost;

        location /socket.io/ {        
            # 此处改为 socket.io 后端的 ip 和端口即可
            proxy_pass http://nodes;

            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
            proxy_http_version 1.1;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header Host $host;
    }

        location / {
            root   html;
            index  index.html index.htm;
        }

        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }

    }
}

此时使用ip:80，连接即可对所socket.io器进行负载。

踩坑：使用docker部署nginx时遇到了诸多问题，例如必须使用真实ip，不能使用localhost等等。