HAproxy+keepalived

HAproxy+keepalivedserver1，server2:vim /etc/keepalived/keepalived.conf

! Configuration File for keepalived

vrrp_script check_haproxy {
script "/opt/check_haproxy.sh"
interval 2
weight 2
}

global_defs {
notification_email {
root@localhost
}
notification_email_from keepalived@server1.lalala.com
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id LVS_DEVEL
vrrp_skip_check_adv_addr
vrrp_strict
vrrp_garp_interval 0
vrrp_gna_interval 0
}

vrrp_instance VI_1 {
state MASTER        #备机BAKEUP
interface eth0
virtual_router_id 188
priority 100        #备机50
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
172.25.88.100
}
track_script {
check_haproxy
}
}

vim check_haproxy.sh

#!/bin/bash
/etc/init.d/haproxy status &> /dev/null || /etc/init.d/haproxy restart &> /dev/null
if [ $? -ne 0 ];then
/etc/init.d/keepalived stop &> /dev/null
fi

这个脚本的意思是haproxy 挂了或者启动不起来了，备机自动接管！！！
vim /etc/haproxy/haproxy.cfg

listen westos *:80
balance     roundrobin
server  web1 172.25.88.3:80 check
server  web1 172.25.88.4:80 check

更多关于HAproxy配置,可以查看这个链接:
HAproxy安装,配置,重定向及读写分离

检验
server1 /etc/init.d/keepalived stop
server2 就接管拉~









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