nginx搭建高可用集群的实现方法

yum install keepalived -y

rpm -q -a keepalived

global_defs {
	 notification_email {
		 acassen@firewall.loc
		 failover@firewall.loc
		 sysadmin@firewall.loc
	 }
	 notification_email_from Alexandre.Cassen@firewall.loc
	 smtp_server 192.168.19.129
	 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 MASTER # 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 100 # 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 {
		192.168.19.50 # VRRP H 虚拟地址（非真实物理地址）
	 } 
}

global_defs {
	 notification_email {
		 acassen@firewall.loc
		 failover@firewall.loc
		 sysadmin@firewall.loc
	 }
	 notification_email_from Alexandre.Cassen@firewall.loc
	 smtp_server 192.168.19.129
	 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 {
		192.168.19.50 # VRRP H 虚拟地址（非真实物理地址）
	 } 
}

#!/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

systemctl start keepalived.service

ps -ef | grep keepalived

systemctl stop keepalived.service
docker stop mynginx