keepalive笔记之二:keepalive+nginx
keepalive的配置文件
! Configuration File for keepalived
global_defs {
notification_email {
acassen@firewall.loc
failover@firewall.loc
sysadmin@firewall.loc
}
notification_email_from Alexandre.Cassen@firewall.loc
smtp_server 192.168.200.1
smtp_connect_timeout 30
router_id LVS_DEVEL
}
vrrp_script check_80 { //定义vrrp脚本
script '/root/check_code.py' //脚本路径
interval 2 //脚本检测时间间隔,脚本必须在间隔时间内返回状态,不然日志报错
//Keepalived_vrrp[7813]: Process [7894] didn't respond to SIGTERM
weight -2 //当脚本返回的状态码不是0时,操作权重
}
vrrp_instance VI_1 {
state MASTER
interface eth0
virtual_router_id 51
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.89.100
}
track_script { //定义监控脚本
check_80
}
}
使用的脚本：/root/check_code.py
（该脚本检查http的状态吗，如果不是200，则关闭keepalive服务，使VIP漂移到备份机上）
#!/usr/bin/env python
import urllib2
import os
url = 'http://192.168.89.81/index.html'
try:
check_code = urllib2.urlopen(url,timeout=1).code
except Exception,e:
print e
check_code = 444
print check_code
if check_code == 200:
pass
else:
os.system('service keepalived stop')
