配置Keepalived监控nginx
--wang
目的：
通过Keepalived实现对nginx的监控，每两秒扫描一次，如果nginx关闭，尝试重启nginx，两秒后检查nginx是否启动，如果还没有启动，就关闭Keepalived。
配置文件：
/etc/keepalived/keepalived.conf
注意事项：
脚本一定要开启执行权限chmod +x /root/shell/nginx_check.sh
脚本内容：
[root@CRS_LH_LoadB ~]# vim /root/shell/nginx_check.sh
#!/bin/bash
time=`date '+%Y%m%d %H%M%S'`
#echo "${time}test script">>/root/shell/test.txt #用于判断脚本是否正常执行，可以注释掉
systemctl status nginx>>/dev/null
if [ $? -ne 0 ] ; then
systemctl start nginx
sleep 2
if [ $? -ne 0 ] ; then
systemctl stop keepalived>>/dev/null
fi
fi
实际配置文件：
主：
global_defs {
router_id Haproxy_HA_m
}
vrrp_script chk_nginx {
script "/root/shell/nginx_check.sh"
interval 2
}
vrrp_instance VI_1 {
state MASTER
interface ens160
virtual_router_id 58
priority 100
advert_int 1
nopreempt
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.100.180
}
track_script { #调用脚本
chk_nginx
}
}
备：
global_defs {
router_id Haproxy_HA_b
}
vrrp_script chk_nginx {
script "/root/shell/nginx_check.sh"
interval 2
}
vrrp_instance VI_1 {
state BACKUP
interface ens160
virtual_router_id 58
priority 80
advert_int 1
nopreempt
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.100.180
}
track_script { #调用脚本
chk_nginx
}
}