centos7 安装keepalived

node1 192.168.5.101

node2 192.168.5.102

1.安装 openssl openssl-devel

yum install openssl openssl-devel -y

2. 安装keepalived 

tar -zxvf keepalived-1.4.0.tar.gz 

./configrue --prefix=/app/keepalived

make&&make install

3.配置keepalived配置文件

! Configuration File for keepalived


global_defs {
    notification_email {
     root@localhost
   }
   notification_email_from root@localhost
   smtp_server localhost
   smtp_connect_timeout 30
   router_id  NodeA    #设置不一样
}


vrrp_instance VI_1 {
    state MASTER   #指定A节点为主节点 备用节点上设置为BACKUP即可
    interface eth0   #绑定虚拟IP的网络接口
    virtual_router_id 51  #VRRP组名，两个节点的设置必须一样，以指明各个节点属于同一VRRP组
    priority 100   #主节点的优先级（1-254之间），备用节点必须比主节点优先级低
    advert_int 1   #组播信息发送间隔，两个节点设置必须一样
    authentication {   #设置验证信息，两个节点必须一致
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {   #指定虚拟IP, 两个节点设置必须一样
        192.168.5.200/24
    }
}

按同样的方法配置节点B并修改配置文件，可将A节点的配置文件复制到B节点，并修改以下几项： 
router_id  NodeB

state   BACKUP

priority   99

其它项不必修改。

7：启动keepalived

mkdir /etc/keepalived/

 cp /app/keepalived-1.4.2/keepalived/etc/init.d/keepalived /etc/init.d/    init.d/keepalived 这个是在原文件中 
cp /app/keepalived-1.4.2/keepalived/etc/sysconfig/keepalived /etc/sysconfig/   sysconfig/keepalived 这个是在原文件中 
 cp /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/ 

systemctl start keepalived