HAProxy+Keepalived构建高可用负载均衡

web1 IP 192.168.0.47

web2 IP 192.168.0.48

haproxy_master 192.168.0.200

haproxy_backup 192.168.0.199

VIP 192.168.0.155

一.安装keepalived 

#wget #tar zxvf keepalived-1.1.15.tar.gz #cd keepalived-1.1.15 #./configure #make #make install 将keepalived做成启动脚务

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

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

#mkdir /etc/keepalived

#cp /usr/local/etc/keepalived/keepalived.conf /etc/keepalived/

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

配置keepalived.conf

#vim /etc/keepalived/keepalived.conf

! Configuration File for keepalived      global_defs {      notification_email {        gaoming@123.com      }      notification_email_from gaoming@123.com      smtp_server 192.168.200.1      smtp_connect_timeout 30      router_id LVS_DEVEL   }      vrrp_instance VI_1 {       state MASTER    #备用服务器上改为 BACKUP       interface eth0       virtual_router_id 51       priority 100    #备用服务器上改为99       advert_int 1       authentication {           auth_type PASS           auth_pass 1111       }       virtual_ipaddress {           192.168.0.155/24 dev eth0 scope global       }   }  

启动keepalived

service keepalived start

启动之后可以用ip add 查看网卡多了一条192.168.0.155的IP

eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast qlen 1000
    link/ether 00:0c:29:ff:6c:c7 brd ff:ff:ff:ff:ff:ff
    inet 192.168.0.200/24 brd 192.168.0.255 scope global eth0
    inet 192.168.0.155/24 scope global secondary eth0
    inet6 fe80::20c:29ff:feff:6cc7/64 scope link
       valid_lft forever preferred_lft forever

说明keepalived启动成功，配置生效