nginx 实现mysql的负载均衡【转】

默认Nginx只支持http的反向代理，要想nginx支持tcp的反向代理，还需要在编译时增加tcp代理模块支持，即nginx_tcp_proxy_module

下面操作步骤只让nginx支持tcp_proxy，没有加入prce、gzip、ssl等功能，如需要，可自行在编译时加上相关参数。

wget https://github.com/yaoweibin/nginx_tcp_proxy_module/archive/master.zip
unzip master
 tar -zxvf nginx-1.6..tar.gz
cd nginx-1.6.
patch -p1 < ../nginx_tcp_proxy_module-master/tcp.patch
./configure --add-module=../nginx_tcp_proxy_module-master --prefix=/usr/local/nginx-1.6. --with-http_stub_status_module --with-http_gzip_static_module
make
make install

nginx.conf主配置文件中增加如下配置配置：（也可以在主配置文件中配置include,包含tcp转发的配置文件include /usr/local/nginx-1.6.3/conf/tcp_proxy.conf;）

user  nobody;
worker_processes  ;

#error_log  logs/error.log;
#error_log  logs/error.log  notice;
error_log  logs/error.log  info;

#pid        logs/nginx.pid;

events {
    worker_connections  ;
}

include /usr/local/nginx-1.6./conf/tcp_proxy.conf;

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

    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';

    #access_log  logs/access.log  main;

    sendfile        on;
    #tcp_nopush     on;

    #keepalive_timeout  ;
    keepalive_timeout  ;

    #gzip  on;

    server {
        listen       ;
        server_name  localhost;

        #charset koi8-r;

        #access_log  logs/host.access.log  main;

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

    location /nginx_status {
        stub_status on;
            access_log  logs/nginx_status.log;
        allow 10.195.197.124;
        deny all;
    }

        #error_page                /.html;

        # redirect server error pages to the static page /50x.html
        #
        error_page        /50x.html;
        location = /50x.html {
            root   html;
        }

    }

}

include /usr/local/nginx-1.6.3/conf/tcp_proxy.conf;

tcp {
    upstream mysql {
        server 10.207.238.66:;
        server 10.207.238.67:;

        check interval= rise= fall= timeout=;
        #check interval= rise= fall= timeout=
        #check interval= rise= fall= timeout=
        #check_http_send "GET /HTTP/1.0\r\n\r\n";
        #check_http_expect_alive http_2xxhttp_3xx;
    }

    server {
listen ;
        proxy_pass mysql;
    }
}

说明：
check interval 健康检查，单位是毫秒
rise 检查几次正常后，将reslserver加入以负载列表中
fall 检查几次失败后，摘除realserver
timeout 检查超时时间，单位许毫秒
具体可查看nginx_tcp_proxy_module-master/README,很详细。

转自

nginx 实现mysql的负载均衡 - ---張榮---的个人空间
https://my.oschina.net/ambari/blog/615203