Nginx配合keepalived实现LVS负载均衡

前言：由于服务器资源有限，keepalived未配主备。

一、架构规划

1、服务器IP地址规划

VIP：192.168.1.6

real_server1:192.168.1.7

real_server2:192.168.1.8

WebServer1:192.168.1.9

WebServer2:192.168.1.10

memcache: 192.168.1.13

mysql主：192.168.1.12

mysql从：192.168.1.2

2、服务器操作系统

所使用的操作系统均为CentOS 6.4

3、网络拓扑图

二、负载服务器配置

1.LVS主服务器配置

安装yum install keepalived ipvsadm

chkconfig keepalived on

vim /etc/ keepalived/keepalived.conf

global_defs {
	notification_email {
        	[email protected]
   	}
	notification_email_from 
	smtp_server 127.0.0.1
	#smtp_connect_timeout 30
	router_id LVS_DEVEL_1
}
vrrp_instance VI_1 {
	state MASTER
	interface eth1
	virtual_router_id 51
	priority 100
	advert_int 1
	authentication {
		auth_type PASS
		auth_pass 1111
    	}
	virtual_ipaddress {
        	192.168.1.6
    	}
}
virtual_server 192.168.1.6 80 {
	delay_loop 6
	#lb_algo wrr
	lb_algo rr
	lb_kind DR
	#persistence_timeout 300
	protocol TCP
real_server 192.168.1.7 80 {
	weight 3
        TCP_CHECK {
        connect_timeout 10
	nb_get_retry 3
	delay_before_retry 3
	connect_port 80
        }
}
real_server 192.168.1.8 80 {
        weight 3 
        TCP_CHECK {
        connect_timeout 10
        nb_get_retry 3
        delay_before_retry 3
        connect_port 80
        }
}
}

2.LVS前端服务器配置（real_server1）

2.1   vim /usr/local/bin/lvs_real

VIP=192.168.1.6
case "$1" in
        start)
                echo " start LVS of REALServer"
                /sbin/ifconfig lo:0 $VIP broadcast $VIP netmask 255.255.255.255 up
                echo "1" >/proc/sys/net/ipv4/conf/lo/arp_ignore
                echo "2" >/proc/sys/net/ipv4/conf/lo/arp_announce
                echo "1" >/proc/sys/net/ipv4/conf/all/arp_ignore
                echo "2" >/proc/sys/net/ipv4/conf/all/arp_announce
                ;;
        stop)
                /sbin/ifconfig lo:0 down
                echo "close LVS Directorserver"
                echo "0" >/proc/sys/net/ipv4/conf/lo/arp_ignore
                echo "0" >/proc/sys/net/ipv4/conf/lo/arp_announce
                echo "0" >/proc/sys/net/ipv4/conf/all/arp_ignore
                echo "0" >/proc/sys/net/ipv4/conf/all/arp_announce
                ;;
        *)
                echo "Usage: $0 {start|stop}"
                exit 1
esac

2.2  编辑安装nginx，此处省略（使用我自己写的一键编译安装脚本安装）

2.3  LVS前端服务器nginx配置

server {
                           listen 80;
                           server_name sandy.com;
                           location / {
                           proxy_redirect off;
                           proxy_set_header Host $host;
                           proxy_set_header X-Real-IP $remote_addr;
                           proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
                           proxy_pass ;
                           }
                           location /coocaa_status {
                           stub_status on;
                           access_log /data/log/nginx_status.log;
                           auth_basic "NginxStatus";
                           allow 192.168.0.58;
                           deny all;
                           }
                           access_log /data/log/access.log access;
                           error_log /data/log/error.log warn;
                       }
                  upstream sandy {
                           sticky;
                           server 192.168.1.9:80;
                           server 192.168.1.10:80;
                           }
                 }

三、Webserver服务器配置

1

四、Memcache服务器配置

五、Mysql服务器配置

后续整理