早期nginx tcp代理（基于patch实现）

nginx tcp代理功能由nginx_tcp_proxy_module模块提供，同时监测后端主机状态。该模块包括的模块有： ngx_tcp_module, ngx_tcp_core_module, ngx_tcp_upstream_module, ngx_tcp_proxy_module, ngx_tcp_upstream_ip_hash_module。

1. 安装

 

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# wget http://nginx.org/download/nginx-1.4.4.tar.gz # tar zxvf nginx-1.4.4.tar.gz # cd nginx-1.4.4 # ./configure --add-module=/path/to/nginx_tcp_proxy_module # make # make install

2. 配置

 

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http {     listen 80;     location /status {         check_status;     } } tcp {     upstream cluster_www_ttlsa_com {         # simple round-robin         server 127.0.0.1:1234;         check interval=3000 rise=2 fall=5 timeout=1000;         #check interval=3000 rise=2 fall=5 timeout=1000 type=ssl_hello;         #check interval=3000 rise=2 fall=5 timeout=1000 type=http;         #check_http_send "GET / HTTP/1.0\r\n\r\n";         #check_http_expect_alive http_2xx http_3xx;     }     server {         listen 8888;         proxy_pass cluster_www_ttlsa_com;     } }

这会出现一个问题，就是tcp连接会掉线。原因在于当服务端关闭连接的时候，客户端不可能立刻发觉连接已经被关闭，需要等到当Nginx在执行check规则时认为服务端链接关闭，此时nginx会关闭与客户端的连接。

3. 保持连接配置

 

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http {     listen 80;     location /status {         check_status;     } } tcp { timeout 1d;     proxy_read_timeout 10d;     proxy_send_timeout 10d;     proxy_connect_timeout 30;     upstream cluster_www_ttlsa_com {         # simple round-robin         server 127.0.0.1:1234;         check interval=3000 rise=2 fall=5 timeout=1000;         #check interval=3000 rise=2 fall=5 timeout=1000 type=ssl_hello;         #check interval=3000 rise=2 fall=5 timeout=1000 type=http;         #check_http_send "GET / HTTP/1.0\r\n\r\n";         #check_http_expect_alive http_2xx http_3xx;     }     server {         listen 8888;         proxy_pass cluster_www_ttlsa_com; so_keepalive on;         tcp_nodelay on;     } }

nginx_tcp_proxy_module模块指令具体参见: http://yaoweibin.github.io/nginx_tcp_proxy_module/README.html