https://docs.nginx.com/nginx/admin-guide/load-balancer/tcp-udp-load-balancer/

• 使用NGINX进行TCP和UDP负载平衡的配置示例

stream {
    upstream stream_backend {
        least_conn;
        server backend1.example.com:12345 weight=5;
        server backend2.example.com:12345 max_fails=2 fail_timeout=30s;
        server backend3.example.com:12345 max_conns=3;
    }
  
    upstream dns_servers {
        least_conn;
        server 192.168.136.130:53;
        server 192.168.136.131:53;
        server 192.168.136.132:53;
    }
  
    server {
        listen        12345;
        proxy_pass    stream_backend;
        proxy_timeout 3s;
        proxy_connect_timeout 1s;
    }
  
    server {
        listen     53 udp;
        proxy_pass dns_servers;
    }
  
    server {
        listen     12346;
        proxy_pass backend4.example.com:12346;
    }
}

user  nginx;
worker_processes  1;

events {
    worker_connections  1024;
}

stream {

    upstream group1 {
        hash $remote_addr consistent;
        server xxx.xxx.xxx.xxx:xxx;     # ip:port
        server xxx.xxx.xxx.xxx:xxx;     # ip:port
    }

    upstream group2 {
        hash $remote_addr consistent;
        server xxx.xxx.xxx.xxx:xxx;     # ip:port
        server xxx.xxx.xxx.xxx:xxx;     # ip:port
    }

    server {
        listen 443;
        listen 443 udp;
        proxy_pass group1;
    }

    server {
        listen 444;
        listen 444 udp;
        proxy_pass group2;
    }

}

stream {

    upstream group1 {
        hash $remote_addr consistent;   #负载均衡一致性hash算法
        server 192.168.1.2:123  max_fails=1 fail_timeout=10s;     # ip:port  weight为轮询权重 max_fails最大失败尝试次数
        server 192.168.1.3:123 max_fails=1 fail_timeout=10s;     # ip:port
    }

    upstream group2 {
        hash $remote_addr consistent;
        server 192.168.1.3:123 max_fails=1 fail_timeout=10s;     # ip:port
        server 192.168.1.2:123 max_fails=1 fail_timeout=10s;     # ip:port
    }

    server {
        listen 23548 so_keepalive=30m::10;  #如果不指定协议的话默认是TCP协议
        listen 23548 udp;
        proxy_pass group1;
        proxy_connect_timeout 10s;          #连接超时时间上限
         proxy_timeout 20s;                       #在没有数据传输的情况下，多久之后关闭连接
    }

    server {
        listen 23549 ;
        listen 23549 udp;
        proxy_pass group2;
    }
}

apt-get update
apt-get install nginx -y
service nginx start
systemctl enable nginx.service
nginx -v
service nginx restart
systemctl enable nginx.service

map $http_upgrade $connection_upgrade {
    default upgrade;
    '' close;
}

upstream appserver {
    server 192.168.100.10:9222; # appserver_ip:ws_port
}

server {
    listen 8888; // client_wss_port
  
    ssl on;
    ssl_certificate /path/to/crt;
    ssl_certificate_key /path/to/key;


    location / {
        proxy_pass http://appserver;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection $connection_upgrade;
    }
}

80端口 中转

server {
    listen 12345;
    location / {
        proxy_http_version 1.1;
        proxy_pass http://www.abc.com:80;
        proxy_connect_timeout 60s;
        proxy_read_timeout 120s;
        proxy_send_timeout 120s;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
    }

}