1、主机 master 192.168.8.154 备用机backup 192.168.8.100 VIP:192.168.8.180
yum -y install keepalived nginx
编辑master上keepalived配置文件
# vim /etc/keepalived/keepalived.conf global_defs { notification_email { 951687336@qq..com } notification_email_from 951687336@qq.com smtp_server 127.0.0.1 smtp_connect_timeout 30 router_id LVS_DEVEL } vrrp_script chk_nginx { script "/usr/local/sbin/check_ng.sh" interval 3 } vrrp_instance VI_1 { state MASTER interface ens33 virtual_router_id 51 priority 100 advert_int 1 authentication { auth_type PASS auth_pass aminglinux>com } virtual_ipaddress { 192.168.8.180 } track_script { chk_nginx } }
定义nginx的监控脚本 vim /usr/local/sbin/check_ng.sh
#!/bin/bash #时间变量,用于记录日志 d=`date --date today +%Y%m%d_%H:%M:%S` #计算nginx进程数量 n=`ps -C nginx --no-heading|wc -l` #如果进程为0,则启动nginx,并且再次检测nginx进程数量, #如果还为0,说明nginx无法启动,此时需要关闭keepalived if [ $n -eq "0" ]; then /etc/init.d/nginx start n2=`ps -C nginx --no-heading|wc -l` if [ $n2 -eq "0" ]; then echo "$d nginx down,keepalived will stop" >> /var/log/check_ng.log systemctl stop keepalived fi fi
chmod a+x /usr/local/sbin/check_ng.sh
配置完成,启动service keepalived start ,ip addr 可以产看网卡中的虚拟ip