nginx四层负载均衡

基于nginx四层负载均衡（tcp）代理mysql集群

1、安装nginx所需依赖

[root@localhost ~]# yum -y install gcc-c++ pcre pcre-devel zlib zlib-devel openssl openssl-devel

2、下载Nginx源码包

[root@localhost ~]# wget http://nginx.org/download/nginx-1.9.9.tar.gz

3、解压并编译安装nginx

[root@localhost ~]# tar -xzf nginx-1.9.9.tar.gz 
[root@localhost ~]# mv nginx-1.9.9 nginx
[root@localhost local]# cd nginx
[root@localhost nginx]# ./configure --prefix=/usr/local/nginx --with-http_ssl_module   --with-stream
[root@localhost nginx]# make -j 2 && make install

4、编辑nginx配置文件

[root@localhost ~]# vim /usr/local/nginx/conf/nginx.conf
在最后一行添加一下内容：
stream {
    server {
       listen 3305;
       proxy_pass db;    
    }
    upstream db {
       server 10.3.131.22:3306;
       server 10.3.131.23:3306;
       server 10.3.131.24:3306;
       server 10.3.131.25:3306;
    }
}

5、启动nginx

[root@localhost ~]# /usr/local/nginx/sbin/nginx 
[root@localhost ~]# ss -lntp
State      Recv-Q Send-Q Local Address:Port               Peer Address:Port              
LISTEN     0      128              *:3305                         *:*                   users:(("nginx",pid=29487,fd=7),("nginx",pid=29486,fd=7))
LISTEN     0      128              *:80                           *:*                   users:(("nginx",pid=29487,fd=6),("nginx",pid=29486,fd=6))

6、测试

[root@localhost ~]# mysql -ullf123 -p'123456' -h localhost -P 3305
Welcome to the MariaDB monitor.  Commands end with ; or \g.
Your MariaDB connection id is 6
Server version: 5.5.64-MariaDB MariaDB Server

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Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

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