Keepalived实现双机热备

第一步.安装.网上很多源码安装的步骤.咱们这里以最快的方式 .

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#安装 yum install -y keepalived #备份 cd /etc/keepalived cp keepalived.conf keepalived.conf.back #创建配置文件 echo "! Configuration File for keepalived #主机配置 global_defs { #id,主从不同    router_id LVS_DEVEL }   vrrp_instance VI_1 { #主机设置为MASTER      state MASTER #网卡1     interface eth0 #主从id要一样     virtual_router_id 51 #主机权重高于从机     priority 80 #广播时间,1秒     advert_int 1 #配置主从要一样     authentication {         auth_type PASS         auth_pass 1111     }     virtual_ipaddress { #虚拟的ip,多个ip换行写即可         192.168.1.237     } } ">./keepalived.conf#启动... keepalived -d -f /etc/keepalived/keepalived.conf

以上是主机配置并启动  

第二步,从机配置并启动

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#安装 yum install -y keepalived #备份 cd /etc/keepalived cp keepalived.conf keepalived.conf.back #创建配置文件 echo "! Configuration File for keepalived #主机配置 global_defs { #id,主从不同    router_id LVS_DEVEL2 }   vrrp_instance VI_1 { #从机设置为BACKUP      state BACKUP #网卡1     interface eth0 #主从id要一样     virtual_router_id 51 #主机权重高于从机     priority 20 #广播时间,1秒     advert_int 1 #配置主从要一样     authentication {         auth_type PASS         auth_pass 1111     }     virtual_ipaddress { #虚拟的ip,多个ip换行写即可 主从一致         192.168.1.237     } } ">./keepalived.conf#启动... keepalived -d -f /etc/keepalived/keepalived.conf

然后启动一个web服务访问一下192.168.1.237吧. 然后断开其中一台机器刷新再看一下 (注意2台机器的防火墙要关闭)