环境：

主机：192.168.102.50

备机：192.168.102.101

vip：192.168.102.30

• 安装keepalived

tar xzf keepalived-1.2.24.tar.gzcd keepalived-1.2.24./configure --prefix=/usr/local/keepalivedmake && make installmkdir /etc/keepalivedcp keepalived.conf /etc/keepalived/keepalived.confcp check_nginx.sh /etc/keepalived/check_nginx.shcp /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/cp /usr/local/keepalived/sbin/keepalived /usr/sbin/chkconfig --level 2345 keepalived on  #注册开机启动

• keepalived.conf

! Configuration File for keepalivedglobal_defs {   notification_email {     ninglong@twsm.com.cn   }   notification_email_from ninglong@twsm.com.cn   smtp_server 127.0.0.1   smtp_connect_timeout 30   router_id LVS_DEVEL_jjrb_prtal   vrrp_skip_check_adv_addr   vrrp_strict   vrrp_garp_interval 0   vrrp_gna_interval 0}vrrp_script chk_nginx {    script "/etc/keepalived/check_nginx.sh"     interval 2     weight -5     fall 3      rise 2 }vrrp_instance VI_1 {    state BACKUP    interface eth0    virtual_router_id 61    priority 100    mcast_src_ip 172.10.101.12    advert_int 1    authentication {        auth_type PASS        auth_pass 1111    }    virtual_ipaddress {        172.10.101.21    }    track_script {       chk_nginx     }}

• check_nginx.sh

#!/bin/bashcounter=$(ps -C nginx --no-heading|wc -l)if [ "${counter}" = "0" ]; then    /usr/local/bin/nginx    sleep 2    counter=$(ps -C nginx --no-heading|wc -l)    if [ "${counter}" = "0" ]; then        /etc/init.d/keepalived stop    fifi

然后在192.168.102.50上 

[root@jjrb ~]# ip a1: lo: 
    
      mtu 16436 qdisc noqueue state UNKNOWN     link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00    inet 127.0.0.1/8 scope host lo    inet6 ::1/128 scope host        valid_lft forever preferred_lft forever2: eth0: 
     
       mtu 1500 qdisc pfifo_fast state UP qlen 1000    link/ether 8c:dc:d4:4e:73:58 brd ff:ff:ff:ff:ff:ff    inet 192.168.102.50/24 brd 192.168.102.255 scope global eth0    inet 192.168.102.30/24 scope global secondary eth0    inet6 fe80::8edc:d4ff:fe4e:7358/64 scope link        valid_lft forever preferred_lft forever[root@jjrb ~]#
     
    

在192.168.102.101上

[root@jjrb1 ~]# ip a1: lo: 
    
      mtu 16436 qdisc noqueue state UNKNOWN     link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00    inet 127.0.0.1/8 scope host lo    inet6 ::1/128 scope host        valid_lft forever preferred_lft forever2: eth0: 
     
       mtu 1500 qdisc pfifo_fast state UP qlen 1000    link/ether 50:65:f3:32:4a:48 brd ff:ff:ff:ff:ff:ff    inet 192.168.102.101/24 brd 192.168.102.255 scope global eth0    inet6 fe80::5265:f3ff:fe32:4a48/64 scope link        valid_lft forever preferred_lft forever[root@jjrb1 ~]#
     
    

停掉50上的keepalived，再查看vip是否转移到101上来，如果转移成功，则配制成功了。另如果主备机上都出现了vip则考虑在防火墙里添加

-A INPUT -d 224.0.0.18/32 -i bond0 -j ACCEPT-A OUTPUT -d 224.0.0.18/32 -o bond0 -j ACCEPT