编译安装配置keepalived1.2.16

Keepalived实现双击热备的功能&＃xff0c;最少两个服务器&＃xff0c;功能实现方式是虚拟出一个IP地址&＃xff0c;并将服务器设置Master和Slave&＃xff0c;基于优先级控制&＃xff0c;当主服务器Down机后备机会立即接替&＃xff0c;当Master恢复后又重取回主服务器运行权利。

1、官网下载地址&＃xff1a;

http://www.keepalived.org/download.html   #截止目前最新版本为1.2.16

环境&＃xff1a;主节点192.168.10.206  node6.a.com

    从节点192.168.10.204  node4.a.com

    虚拟IP&＃xff1a;192.168.10.16

2、解压安装包&＃xff1a;

[root&＃64;node6 ~]# tar xvf keepalived-1.2.16.tar.gz

3、进入安装目录&＃xff1a;

[root&＃64;node6 ~]# cd keepalived-1.2.16

4、安装

解决依赖&＃xff1a;

[root&＃64;node6 keepalived-1.2.16]# yum install ipvsadm

安装keepalived:

[root&＃64;node6 keepalived-1.2.16]# ./configure

[root&＃64;node6 keepalived-1.2.16]# make && make install 

5、复制脚本和文件&＃xff1a;

[root&＃64;node6 keepalived-1.2.16]# cp  /usr/local/etc/rc.d/init.d/keepalived  /etc/rc.d/init.d/

[root&＃64;node6 keepalived-1.2.16]# cp /usr/local/etc/sysconfig/keepalived  /etc/sysconfig/

[root&＃64;node6 keepalived-1.2.16]# mkdir /etc/keepalived

[root&＃64;node6 keepalived-1.2.16]# cp /usr/local/etc/keepalived/keepalived.conf  /etc/keepalived/

[root&＃64;node6 keepalived-1.2.16]# cp /usr/local/sbin/keepalived  /usr/sbin/

6、主节点配置&＃xff1a;

global_defs {

   notification_email {

     root&＃64;localhost  #邮件通知

   }

   notification_email_from Alexandre.Cassen&＃64;firewall.loc

   smtp_server 127.0.0.1

   smtp_connect_timeout 30

   router_id LVS_DEVEL

}

vrrp_instance VI_1 {

    state MASTER

    interface eth0

    virtual_router_id 51

    priority 100

    advert_int 1

    authentication {

        auth_type PASS

        auth_pass 1111

    }

    virtual_ipaddress {

        192.168.10.16

    }

}

7、从节点配置&＃xff1a;

global_defs {

   notification_email {

     root&＃64;localhost

   }

   notification_email_from Alexandre.Cassen&＃64;firewall.loc

   smtp_server 127.0.0.1

   smtp_connect_timeout 30

   router_id LVS_DEVEL

}

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 {

        192.168.10.16

    }

}

8、启动服务&＃xff1a;

[root&＃64;node6 keepalived-1.2.16]# /etc/init.d/keepalived   restart

Stopping keepalived:                                       [FAILED]

Starting keepalived:                                       [  OK  ]

9、验证:

主节点查看IP&＃xff1a;

从节点查看IP&＃xff1a;

可以看到虚拟IP192.168.10.16在主节点的网卡上。

10.将主节点Keepalived关闭&＃xff0c;验证IP是否会切换到从节点&＃xff0c;并在从节点查看日志是否有信息输出&＃xff1a;

主节点关闭keepalived&＃xff1a;

从节点日志&＃xff1a;

从节点查看IP&＃xff1a;

11、主节点重新启动keepalive&＃xff0c;查看IP是否会重新绑定在主节点网卡&＃xff0c;并查看从接地那日志是否有信息输出&＃xff1a;

主节点启动服务&＃xff1a;

从节点查看日志&＃xff1a;

主节点查看IP信息&＃xff1a;

由此可见IP地址又重新绑定在了主节点网卡了&＃xff0c;即达到了双击热备的目的。

下次基于此环境安装haproxy&＃xff0c;以实现高可用加负载均衡的效果。