Haproxy+Keepalived+MySQL Cluster实现负载均衡

由于在生产环境使用了mysqlcluster,需要实现高可用负载均衡,选用keepalived+haproxy来实现。

1.Mysql Cluster安装

参考 CentOS 6.3 安装 mysql-cluster-gpl-7.4.7
http://maosheng.iteye.com/blog/2249106

2.haproxy安装（haproxy-1.3.15.10）

参考CentOS 6.3 安装 HAProxy
http://maosheng.iteye.com/blog/2256676

haproxy配置文件：

# vi /etc/haproxy/haproxy.conf

global
      maxconn 4096
      pidfile /var/run/haproxy.pid
      daemon
      nbproc 1 
defaults
        log global
        mode http
        retries 3
        option redispatch
        option httplog
        option httpclose
        option  abortonclose
        maxconn 4096
        timeout connect 50000
        timeout client 50000
        timeout server 50000

listen mysql_proxy
        bind 172.16.10.75:3366
        mode tcp
        option tcpka
        option httpchk
        balance roundrobin 
        server mysqldb1 172.16.10.70:3306 weight 1
        server mysqldb1 172.16.10.71:3306 weight 1
listen stats
       bind 172.16.10.75:8888
       mode http
       option httpclose
       option httplog
       stats refresh 5s
       balance roundrobin
       stats uri /
       stats realm Haproxy\ Statistics
       stats auth admin:admin

3.keepalived安装

参考CentOS 6.3 安装 Keepalived
http://maosheng.iteye.com/blog/2238747

参考Keepalived+Nginx 实现双机热备
http://maosheng.iteye.com/blog/2242594

keepalived配置文件：

Master：

# vi /etc/keepalived/keepalived.conf

! Configuration File for keepalived


global_defs {
   notification_email {
     root@localhost
   }
   notification_email_from keepalived@localhost
   smtp_server 127.0.0.1
   smtp_connect_timeout 30
   router_id HAProxy_DEVEL_1
}

vrrp_script chk_http_port {
script "/etc/keepalived/check_haproxy.sh"
interval 2
weight 2
  }

vrrp_instance VI_1 {
    state MASTER
    interface eth0
    virtual_router_id 51
    priority 101
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }

track_script {
chk_http_port
}

    virtual_ipaddress {
        172.16.10.75
    }
}

Backup：

# vi /etc/keepalived/keepalived.conf

! Configuration File for keepalived


global_defs {
   notification_email {
     root@localhost
   }
   notification_email_from keepalived@localhost
   smtp_server 127.0.0.1
   smtp_connect_timeout 30
   router_id HAProxy_DEVEL_2
}

vrrp_script chk_http_port {
script "/etc/keepalived/check_haproxy.sh"
interval 2
weight 2
  }

vrrp_instance VI_1 {
    state MASTER
    interface eth0
    virtual_router_id 51
    priority 100
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }

track_script {
chk_http_port
}

    virtual_ipaddress {
        172.16.10.75
    }
}

配置侦测haproxy状态脚本：

# vi /etc/keepalived/check_haproxy.sh

#!/bin/bash
A=`ps -C haproxy --no-header |wc -l`
if [ $A -eq 0 ];then
  /usr/local/haproxy-1.3.15.10/sbin/haproxy -f /etc/haproxy/haproxy.conf
  sleep 3

  if [ `ps -C haproxy --no-header |wc -l` -eq 0 ];then
    /etc/init.d/keepalived stop
  fi
fi


4.haproxy检查

http://172.16.10.75:8888/