haproxy高可用之非抢占keepalived（二）
1、安装keepalivedyum install keepalived
2、编辑配置文件 /etc/keepalived/keepalived.conf
主：
global_defs {
notification_email {
xiaocheng@qq.com#可以添加多个邮箱接收报警
}
notification_email_from admin@163.com
smtp_server smtp.qiye.163.com
smtp_connect_timeout 30
router_id keepalived_1
}
vrrp_script chk_haproxy {
script "killall -0 haproxy" #服务探测，返回0说明服务是正常的
interval 1 #每隔1秒探测一次
weight 2 #haproxy上线，权重加2；其他情况权重不变
}
#
vrrp_instance 192.168.1.50 { #双主实例1
state MASTER #ha1（192.168.1.50）为主，ha2（192.168.1.60）为备
# state BACKUP #测试下来状态设置为MASTER/BACKUP皆可实现非抢占
interface eth1
virtual_router_id 88 #实例192.168.1.50的VRID为88 主备id需设为一致
priority 101 #主（192.168.1.50）的优先级为101，备的（192.168.1.60）优先级为100
smtp_alert
advert_int 1
authentication {
auth_type PASS
auth_pass 123456
}
#
virtual_ipaddress {
192.168.1.99 #实例192.168.1.50的VIP
}
track_interface {
eth1
}
#
track_script { #脚本追踪
chk_haproxy
}
#状态变化时你要触发的脚本
notify_master "/etc/keepalived/notify.sh master"
notify_backup "/etc/keepalived/notify.sh backup"
notify_stop "/etc/keepalived/notify.sh stop"
notify_fault "/etc/keepalived/notify.sh fault"
} 备：
global_defs {
notification_email {
xiaocheng@qq.com
}
notification_email_from admin@163.com
smtp_server smtphz.qiye.163.com
smtp_connect_timeout 30
router_id keepalived_2
}
vrrp_script chk_haproxy {
script "killall -0 haproxy"
interval 1
weight 3 #haproxy上线，权重加3；其他情况权重不变
}
vrrp_instance 192.168.1.60 {
state BACKUP
interface eth0
virtual_router_id 88
priority 100
advert_int 1
smtp_alert
authentication {
auth_type PASS
auth_pass 123456
}
#
virtual_ipaddress {
192.168.1.99
}
track_interface {
eth0
}
#
track_script {
chk_haproxy
}
notify_master "/etc/keepalived/notify.sh master"
notify_backup "/etc/keepalived/notify.sh backup"
notify_stop "/etc/keepalived/notify.sh stop"
notify_fault "/etc/keepalived/notify.sh fault"
}
分别启动192.168.1.50、192.168.1.60上的haproxy、keepalived
这样的话haproxy的高可用就完成了。
当然这样设置之后，报警邮件是收不到的。要想让keepalived默认报警设置生效，请参考
keepalived 默认报警设置使用外部邮箱
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