1.准备两台虚拟机分别为 : 192.168.11.110 , 192.168.11.120 ; 分别装上nginx,keepalived
yum install keepalived -y
2.进入/etc/keepalived/keepalivec.conf 配置文件修改
global_defs {
notification_email {
acassen@firewall.loc
failover@firewall.loc
sysadmin@firewall.loc
}
notification_email_from Alexandre.Cassen@firewall.loc
smtp_server 192.168.11.120 #本地主机名
smtp_connect_timeout 30
router_id LVS_DEVEL
}
vrrp_script chk_http_port {
script "/usr/local/src/nginx_check.sh"
interval 2 #(检测脚本执行的间隔)
weight 2
}
vrrp_instance VI_1 {
state BACKUP #备份服务器上将 MASTER 改为 BACKUP
interface ens33 //网卡
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
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.11.50 // VRRP H 虚拟地址
}
}
3.在/usr/local/src 添加检测脚本
nginx_check.sh
#!/bin/bash
A=`ps -C nginx –no-header |wc -l`
if [ $A -eq 0 ];then
/usr/local/nginx/sbin/nginx
sleep 2
if [ `ps -C nginx --no-header |wc -l` -eq 0 ];then
killall keepalived
fi
fi
4.启动nginx可keepalived
./nginx
systemctl start keepalived.service
5.测试: 输入192.168.11.50,关掉自己服务器(192.168.11.110) 和keeplived,在输入