Master配置文件 注意iptables防火墙(见上个随笔)和健康检查脚本
keepalived 只是高可用,如果keepalived宕机后,ip会飘到备份主机,但是如果nginx掉了,keepalived是不会stop掉的,所以需要脚本做健康检查,代码如下:
! 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 web1
}
vrrp_script check_nginx {
script "/etc/keepalived/check_nginx.sh"
interval 2
weight -5
fall 2
rise 1
}
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 {
192.168.1.120
}
track_script {
check_nginx
}
}
# virtual_router_id 51必须一致
脚本代码
#!/bin/bash A=$(ss -aunpt | grep nginx | wc -l) if [ $A -eq 0 ] ; then /usr/bin/kill -15 `cat /var/run/keepalived.pid` echo -e "keeplived is stoped" else exit 0 fi
##注意脚本要加执行权限+x vrrp_script
vrrp_script
interval 2 : 每2s检测一次
weight -5 : 检测失败(脚本返回非0)则优先级 -5
fall 2 : 检测连续 2 次失败才算确定是真失败。会用weight减少优先级(1-255之间)
rise 1 : 检测 1 次成功就算成功。但不修改优先级
由于本人只有两台高可用,就不写备份机的代码和脚本了。
原文地址:https://www.cnblogs.com/lsgo/p/10492671.html