对nginx的最低版本要求是？

  • 1.9.13

The ngx_stream_proxy_module module (1.9.0) allows proxying data streams over TCP, UDP (1.9.13), and UNIX-domain sockets.

简单的配置是什么样？

例如监听本地53的udp端口，然后转发到192.168.136.130和192.168.136.131的53端口

注意事项

  1. stream是顶层的配置，不能包含在http模块里面
  2. proxy_responses很重要，如果你的udp服务只接受udp消息，并不发送udp消息，那么务必将proxy_responses的值设置为0
stream {
    upstream dns_upstreams {
        server 192.168.136.130:53;
        server 192.168.136.131:53;
    }

    server {
        listen 53 udp;
        proxy_pass dns_upstreams;
        proxy_timeout 1s;
        proxy_responses 0;
        error_log logs/dns.log;
    }
}

| Syntax: | proxy_responses number;

Default:—
Context:stream, server

|

This directive appeared in version 1.9.13.

Sets the number of datagrams expected from the proxied server in response to a client datagram if the UDP protocol is used. The number serves as a hint for session termination. By default, the number of datagrams is not limited. If zero value is specified, no response is expected. However, if a response is received and the session is still not finished, the response will be handled.

我能用HAProxy吗？

答： HAProxy不支持udp Proxy，你不能用

HAProxy is a free, very fast and reliable solution offering high availability, load balancing, and proxying for TCP and HTTP-based applications

参考