Centos6.5安装配置keepalived

下载keepalived

http://www.keepalived.org/software/

首先检查安装openssl-devel

yum install openssl-devel

如果是离线，借鉴文章：http://blog.csdn.net/gsying1474/article/details/48396205

# ./configure --prefix=/usr/local/keepalived --with-kernel-dir=/usr/src/kernels/2.6.32-279.el6.x86_64

当出现如下字样

Keepalived configuration

------------------------

Keepalived version       : 1.2.19

Compiler                 : gcc

Compiler flags           : -g -O2

Extra Lib                : -lssl -lcrypto -lcrypt

Use IPVS Framework       : Yes

IPVS sync daemon support : Yes

IPVS use libnl           : No

fwmark socket support    : Yes

Use VRRP Framework       : Yes

Use VRRP VMAC            : Yes

SNMP support             : No

SHA1 support             : No

Use Debug flags          : No

执行安装命令

# make 

# make install

设置keepalived开机启动脚本

cp /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/rc.d/init.d/

cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/

cp /usr/local/keepalived/sbin/keepalived /usr/sbin/

chkconfig keepalived on

新建一个配置文件，默认keepalived启动会去/etc/keepalived目录下寻找配置文件

# mkdir /etc/keepalived

# vi /etc/keepalived/keepalived.conf

global_defs {

   notification_email {

     [e-mail]

   }

   notification_email_from root@localhost

   smtp_server 127.0.0.1

   smtp_connect_timeout 30

   router_id LVS_DEVEL

}

 

vrrp_instance VI_1 {

    state MASTER         # 备份服务器上将 MASTER 改为 BACKUP 

    interface eth0           # HA 监测网络接口

    virtual_router_id 51     # 主、备机的 virtual_router_id 必须相同

    priority 100           # 主、备机取不同的优先级，主机值较大，备份机值较小

    advert_int 2        # VRRP Multicast 广播周期秒数

    authentication {

        auth_type PASS         #VRRP 认证方式

        auth_pass 1111          #VRRP 口令字

    }

    virtual_ipaddress {

        192.168.30.20               # VRRP HA 虚拟地址 如果有多个VIP，继续换行填写

    }

}

 

virtual_server 192.168.30.20 80 {

    delay_loop 2                   # 每隔 6 秒查询 realserver 状态

    lb_algo rr                        #lvs 算法

    lb_kind DR                      # Direct Route

    persistence_timeout 50             # 同一IP 的连接60 秒内被分配到同一台realserver

    protocol TCP                     # 用 TCP 协议检查 realserver 状态

 

  real_server 192.168.30.12 80 {

       weight 3          #(权重)

    TCP_CHECK {   

       connect_timeout 10       #(10秒无响应超时)
        nb_get_retry 3
        delay_before_retry 3
        connect_port 80   

    }

}

real_server 192.168.30.13 80 {

       weight 3          #(权重)

    TCP_CHECK {   

       connect_timeout 10       #(10秒无响应超时)
        nb_get_retry 3
        delay_before_retry 3
        connect_port 80   

    }

}

}

配置完成后启动keepalived，

如果是要配置mysql HA，那么需要在启动mysql相关服务前，要启动keepalived，否则将会无法连接到服务器

如果需要配置读写优先级分离，可以配置权重即可，参考文章：http://www.elesos.com/index.php?title=MySQL%E9%9B%86%E7%BE%A4%E7%B3%BB%E5%88%972%EF%BC%9A%E9%80%9A%E8%BF%87keepalived%E5%AE%9E%E7%8E%B0%E5%8F%8C%E4%B8%BB%E9%9B%86%E7%BE%A4%E8%AF%BB%E5%86%99%E5%88%86%E7%A6%BB&printable=yes#.E6.B5.8B.E8.AF.95.E8.AF.BB.E5.86.99.E5.88.86.E7.A6.BB

相关参考文档：

http://blog.csdn.net/jiedushi/article/details/4379372

http://www.showerlee.com/archives/702

keepalived+LVS超时设置产生的realserver的tcp连接不释放问题：

http://blog.csdn.net/xqj198404/article/details/15815497

怎么样让 LVS 和 realserver 工作在同一台机器上

http://www.linuxde.net/2012/05/10652.html

keepalived的健康检查方式

http://www.360doc.com/content/14/0415/10/1123425_369112331.shtml

lvs & keepalived的tcp 长连接的有关问题解决方法

http://www.csdn123.com/html/exception/110/110689_110683_110687.htm