海运的博客

stream {
  log_format tcp '$remote_addr [$time_local] '
    '$protocol $status $bytes_sent $bytes_received '
    '$session_time "$upstream_addr" '
    '"$upstream_bytes_sent" "$upstream_bytes_received" "$upstream_connect_time"';

  log_format stream_routing '$remote_addr [$time_local] '
    'with SNI name "$ssl_preread_server_name" '
    'proxying to "$upstream_addr" '
    '$protocol $status $bytes_sent $bytes_received '
    '$session_time';

  map $ssl_preread_server_name $name {
    ~^www.haiyun.me haiyun;
    ~^haiyun.me haiyun;
    default nginx;
  }
  upstream haiyun {
    #hash $remote_addr consistent;
    server 1.1.1.1:1111 weight=5 max_fails=1 fail_timeout=10s;
    server 1.1.1.1:1112 weight=5 max_fails=1 fail_timeout=10s;
    server 1.1.1.1:1113 weight=5 max_fails=1 fail_timeout=10s;
  }
  upstream nginx {
    server 127.0.0.1:4443;
  }
  server {
    listen 443 ;
    listen [::]:443 ;
    ssl_preread on;
    proxy_protocol on;
    proxy_pass $name;
    proxy_connect_timeout 10s;
    proxy_timeout 10s;
    access_log /run/log/nginx/access.log tcp;
    error_log /run/log/nginx/error.log;
  }
}

后端获取来源真实IP：

server
{
  listen       1443 default proxy_protocol ssl ;
  server_name www.haiyun.me haiyun.me;

  set_real_ip_from 127.0.0.1;
  real_ip_header proxy_protocol;
}

遇到的一些问题：
1.修改stream内配置后nginx -s reload无效，需重启nginx
2.当开启proxy_protocol后每个后端都要支持proxy_protocol，不然无法正常连接，这点不如haproxy，可以指定后端开启
https://docs.nginx.com/nginx/admin-guide/load-balancer/tcp-udp-load-balancer/
https://docs.nginx.com/nginx/admin-guide/load-balancer/using-proxy-protocol/

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