lvs+keepalived负载均衡

OS：ubuntu 7.10

VIP:192.168.6.7

keepalived:192.168.6.3

keepalived:192.168.6.4

apache:192.168.6.5

apache2:192.168.6.6

 

在 keepalived和keepalived2  hosts 添加

192.168.6.3     keepalived

192.168.6.4    keepalived2

 

软件：ipvsadm   keepalived

 

一. keepalived 和 keeplived2安装

1.apt-get install  ipvsadm  keepalived

2.在 /etc/keepalived 里添加一个keepalived.conf 文件默认是没有的，

vim keepalived.conf

 

global_defs {
   notification_email {
     [email protected]
   }
   notification_email_from [email protected]
   smtp_server 127.0.0.1
   smtp_connect_timeout 30
   router_id LVS_DEVEL
}

vrrp_instance VI_1 {
    state MASTER    # keepalived2 机器为 BAUCK
    interface eth0
    virtual_router_id 51
    priority 102        # keepalived  机器为 101
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
       192.168.6.7
    }
}
virtual_server 192.168.6.7 80 {
    delay_loop 6
    lb_algo rr    
    lb_kind DR
   persistence_timeout 50   # 默认50秒钟都访问同一台机器
    protocol TCP

    real_server 192.168.6.5 80 {
        weight 1
        TCP_CHECK {
        connect_port 80
        connect_timeout 30
        }
    }
    real_server 192.168.6.6 80 {
        weight 1
        TCP_CHECK {
        connect_port 80
        connect_timeout 30
        }
    }
}

 

 

二.配置 apache 和 apache2

1.apache 安装与配置不多说，在默认页面

apache:192.168.6.5   index.html  5

apache2:192.168.6.6 index.html  6

 

2.在 /etc/sysctl.conf  添加

net.ipv4.ip_forward=0
net.ipv4.conf.lo.arp_ignore=1
net.ipv4.conf.lo.arp_announce=2
net.ipv4.conf.all.arp_ignore=1
net.ipv4.conf.all.arp_announce=2

 

3.修改 /etc/network/interfaces 固定IP 和 轮循  lo:0

auto lo
iface lo inet loopback

auto lo:0
iface lo:0 inet static
address 192.168.6.7
netmask 255.255.255.255
# The primary network interface
auto eth0
iface eth0 inet static
address 192.168.6.5    #apache 2 为 address 192.168.6.6
netmask 255.255.255.0
gateway 192.168.6.1

 

三.测试

在 keepalived 和 keepalived2 上启动服务~

/etc/init.d/keepalived start

然后在  浏览器上 输入 192.168.6.7 显示 5

在打开一个浏览器输入 192.168.6.7 显示 6

说明 lvs工作正常

然后把  apache 5  停掉

在ha上执行

root@ha:/etc/default # ipvsadm -ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
TCP  192.168.6.7:80 rr persistent 50
  -> 192.168.6.6:80               Route   1      2          1
只显示有 6 ``说明`` keepalived 工作正常

把 apache 5启来``

把ha 网卡禁掉``

在用浏览器 访问 192.168.6.7 显示 网页``说明正常```

 

ps: php session 共享同步请看我写的blog ，呵呵简单的web集群！

 

注：谢谢秋香的提示，本文以修改