[root@tomcat2 sbin]# ./nginx -s reload
[root@tomcat2 sbin]# pwd
/usr/local/nginx/sbin

[root@tomcat2 data]# ll
total 0
drwxr-xr-x 2 root root 19 Mar 17 17:26 image
drwxr-xr-x 2 root root 19 Mar 17 17:29 www
[root@tomcat2 data]# cd image/
[root@tomcat2 image]# ls
1.jpeg
[root@tomcat2 data]# cd www/
[root@tomcat2 www]# ll
total 4
-rw-r--r-- 1 root root 27 Mar 17 17:29 a.html

[root@tomcat2 conf]# cd /usr/local/nginx/sbin/
[root@tomcat2 sbin]# ./nginx -s reload

[root@nginx-master ~]# vim /usr/local/src/nginx_check.sh
#!/bin/bash
A=`ps -C nginx –no-header |wc -l`
if [ $A -eq 0 ];then
    /usr/local/nginx/sbin/nginx #nginx启动路径
    sleep 2
    if [ `ps -C nginx --no-header |wc -l` -eq 0 ];then
        killall keepalived #nginx挂掉后，杀掉这个服务器的所有keepalived进程
    fi
fi

[root@nginx-master src]# vim /etc/keepalived/keepalived.conf
#全局配置
global_defs {
    notification_email {
    acassen@firewall.loc
    failover@firewall.loc
    sysadmin@firewall.loc
    }
    notification_email_from Alexandre.Cassen@firewall.loc
    smtp_server 172.20.10.13 #主机ip
    smtp_connect_timeout 30
    router_id LVS_DEVEL #服务器域名名字，可在/etc/hosts中查看127.0.0.1映射的域名
}
#脚本配置
vrrp_script chk_http_port {
    script "/usr/local/src/nginx_check.sh" #脚本路径
    interval 2 #（检测脚本执行的间隔）;每隔2s检查一次
    weight 2 #设置服务器权重
}
#虚拟ip的配置
vrrp_instance VI_1 {
        state MASTER # Master为Master；Salve为BACKUP
        interface ens33 #网卡；可以用ip addr 看网卡名
        virtual_router_id 51 # 主、备机的 virtual_router_id 必须相同
        priority 90 # 主、备机取不同的优先级，主机值较大，备份机值较小
        advert_int 1 #每1s发送一次心跳
        authentication {
        auth_type PASS
        auth_pass 1111
        }
        virtual_ipaddress {
        172.20.10.50 #VRRP H 虚拟ip地址,多台keepalived绑定一个ip；必须同一网段
        }
}

smtp_server 172.20.10.13 #主机ip
state BACK
priority 90

[root@nginx-master ~]# systemctl stop keepalived      
[root@nginx-master ~]# cd /usr/local/nginx/sbin/
[root@nginx-master sbin]# ./nginx -s stop
[root@nginx-master sbin]#