Nginx负载均衡MYSQL数据库

Nginx_Proxy_Mysql.png

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,具体实现如下。
 

一、编译安装


添加nginx支持tcp_proxy模块,如需其他功能自动编译其他模块,例如:prce、gzip、ssl等功能。
cd /usr/local/src/
wget "https://github.com/yaoweibin/nginx_tcp_proxy_module/archive/master.zip"
mkdir -pv /data/ModulePlugin && unzip master.zip -d /data/ModulePlugin/
wget 'http://nginx.org/download/nginx-1.2.1.tar.gz'
tar -xzvf nginx-1.2.1.tar.gz
cd nginx-1.2.1/
patch -p1 < /data/ModulePlugin/nginx_tcp_proxy_module-master/tcp.patch
./configure --prefix=/usr/local/nginx --add-module=/data/ModulePlugin/nginx_tcp_proxy_module-master/ --with-http_stub_status_module --with-http_gzip_static_module
make
make install

 
 

二、添加配置


1、在主配置文件nginx.conf 中include 加载目录
user  nobody;
worker_processes 4;

error_log logs/error.log info;

pid logs/nginx.pid;


events {
worker_connections 2048;
}

include /usr/local/nginx/conf/vhost/*.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 65;
#gzip on;

server {
listen 3306;
server_name udb.com;

#charset utf-8;

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

location /nginx_status {
stub_status on;
access_log logs/nginx_status.log;
allow 10.0.1.136;
deny all;
}

#error_page 404 /404.html;

# redirect server error pages to the static page /50x.html
#
error_page 500 502 503 504 /50x.html;
location = /50x.html {
root html;
}

}

}
/usr/local/nginx/conf/vhost/proxy_mysql.conf 内容如下:
tcp {
upstream mysqldb {
server 10.0.1.138:3306;
server 10.0.1.139:3306;

check interval=3000 rise=2 fall=5 timeout=1000;
#check interval=3000 rise=2 fall=5 timeout=1000
#check interval=3000 rise=2 fall=5 timeout=1000
#check_http_send "GET /HTTP/1.0\r\n\r\n";
#check_http_expect_alive http_2xxhttp_3xx;
}

server {
listen 3307;
proxy_pass mysqldb;
}
}
参数说明:
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,也可以查看:https://github.com/yaoweibin/nginx_tcp_proxy_module

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