Linux下keepalive HA 配置文档

1.安装keepalived（主备均安装）

cd/data/software

wgethttp://www.keepalived.org/software/keepalived-1.2.6.tar.gz

tar -zxvfkeepalived-1.2.6.tar.gz

cdkeepalived-1.2.6

./configure--prefix=/usr/local/keepalived

注：对于新服务器，在进行二进制安装时会出现几个报错，是因为系统缺少某些软件导致的

yum install openssl-*

yum install gcc popt-devel

然后再执行

./configure--prefix=/usr/local/keepalived

make

makeinstall

①建立服务启动脚本，以便使用service命令控制之

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

chmod +x /etc/init.d/keepalived

②修改/etc/init.d/keepalived寻找大约15行左右的./etc/sysconfig/keepalived, 修改为：

./usr/local/keepalived/etc/sysconfig/keepalived 即指向正确的文件位置

修改环境变量

vi /etc/profile

export PATH="$PATH:/usr/local/keepalived/sbin"

source /etc/profile

③修改/usr/local/keepalived/etc/sysconfig/keepalived文件，设置正确的服务启动参数

KEEPALIVED_OPTIONS="-D -f/usr/local/keepalived/etc/keepalived/keepalived.conf"

ln -s /usr/local/keepalived/sbin/keepalived /usr/sbin/

④经过以上修改，keepalived基本安装即可完成，启动测试之：

service keepalived start

⑤切勿忘记将此服务设置为开机启动

chkconfig keepalived on

2.配置主备模式

在这种模式下，虚拟IP在某时刻只能属于某一个节点，另一个节点作为备用节点存在。当主节点不可用时，备用节点接管虚拟IP，提供正常服务。

节点A 192.168.251.144 (主节点),

节点B 192.168.251.141 (备节点)

虚拟IP 192.168.251.150

要求默认情况下由节点A提供服务，当节点A不可用时，由节点B提供服务当节点A启动后，信号自动从节点B切换到节点A，经测试，中间切换时间小于10s

主节点A配置文件   vi /usr/local/keepalived/etc/keepalived/keepalived.conf

! Configuration File for keepalived

vrrp_script check_keepalived {

     script"/usr/local/keepalived/etc/keepalived/check_keepalived.sh"

     interval 5

     }

global_defs {

   router_idNodeA

}

vrrp_instance VI_1 {

    state MASTER

    interfaceeth0

   virtual_router_id 51

    priority 100

    advert_int 1

   authentication {

       auth_type PASS

       auth_pass 1111

    }

    virtual_ipaddress{

       192.168.251.150/24

        }

    track_script{

       check_keepalived

     }

}

备节点B配置文件   vi /usr/local/keepalived/etc/keepalived/keepalived.conf

! Configuration File forkeepalived

global_defs {

  router_id NodeB

}

vrrp_instance VI_1 {

   state BACKUP

   interface eth0

   virtual_router_id 51

   priority 99

   advert_int 1

   authentication {

        auth_type PASS

        auth_pass 1111

   }

   virtual_ipaddress {

        192.168.251.150/24

   }

}

编写进程检测脚本check_keepalived.sh

#!/bin/bash

if [ "$(ps-ef | grep "java"| grep WowzaStreamingEngine |grep -v grep )" =="" ]

 then

  service keepalived stop

fi

上传至/usr/local/keepalived/etc/keepalived/下，只需要在主服务器上添加。

六、启动：

启动wowza

servicekeepalived start/stop/status