LVS+DR+Keepalived实现方式

来源地址：

http://blog.yunvi.com/html/797.html

来源内容：

一：安装配置 LVS+DR+Keepalived

 

       负载服务器master真实IP        192.168.1.106
       负载服务器backup真实IP    192.168.1.114
       负载服务器虚拟IP              192.168.1.10
       后端WEB服务器IP                 192.168.1.50
       后端WEB服务器IP                 192.168.1.60
系统：Redhat 5.4 x86 内核：2.6.18-164.el5
1.下载所需要的软件：ipvsadm keepalived
2.安装ipvsadm(负载均衡器都要配置master和backup)
A．建立内核快捷方式：
ln –s /usr/src/kernels/2.6.18-164.e15-i686 /usr/src/linux
B.解压ipvsadm，编译ipvsadm
tar    zxvf  ipvsadm-1.24.tar.gz
cd ipvsadm-1.24
make ; make install
C.显示如下：
[root@master ~]# /sbin/ipvsadm -v
ipvsadm v1.24 2005/12/10 (compiled with popt and IPVS v1.2.1)
则Ipvsadm安装成功
3.安装keepalived负载均衡器都要配置master和backup)
tar    zxvf keepalived-1.1.18tar.gz
cd keepalived-1.1.18
./configure --prefix=/usr/local/keepalived
make ; make install
cp etc/rc.d/init.d/keepalived  /etc/rc.d/init.d/
cp etc/sysconfig/keepalived /etc/sysconfig/
mkdir /etc/keepalived
cp etc/keepalived/keepalived.conf  /etc/keepalived/
cp sbin/keepalived /usr/sbin/
启动keepalived
service keepalived start|stop|restart
4.配置master和backup
A．开启ip_forward 转发功能：
sysctl –w net.ipv4.ip_forward = 1
B．配置keepalived.conf 配置文件
Vim /etc/keepalived/keepalived.conf
 
! Configuration File for keepalived
 
global_defs {
   notification_email {
        crazyunix@139.com #
   }
   notification_email_from crazyunix@139.com
   smtp_server smtp.139.com
#   smtp_connect_timeout 30
   router_id LVS_DEVEL
}
 
vrrp_instance VI_1 {
    state MASTER    #备份服务器上将MASTER改为BACKUP 
    interface eth0    #HA监测网络接口
    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     #VRRP Multicast广播周期秒数
    authentication {
        auth_type PASS    #VRRP认证方式
        auth_pass 1111    #VRRP口令字
    }
    virtual_ipaddress {
        192.168.1.10   #(如果有多个VIP，继续换行填写.)
    }
}
 
virtual_server 192.168.1.10 80 {
    delay_loop 2   #每隔2秒查询realserver状态
    lb_algo rr          #lvs 算法
    lb_kind DR        #Direct Route
    persistence_timeout 50 #同一IP的连接60秒内被分配到同一台realserver
    protocol TCP         #用TCP协议检查realserver状态
 
    real_server 192.168.1.50 80 {
        weight 100
        TCP_CHECK {
            connect_timeout 3
            nb_get_retry 3
            delay_before_retry 3
        }
    }
 
    real_server 192.168.1.60 80 {
        weight 1
        TCP_CHECK {
            connect_timeout 3
            nb_get_retry 3
            delay_before_retry 3
        }
    }
}
 BACKUP服务器同上配置，先安装lvs再按装keepalived,仍后配置/etc/keepalived/keepalived.conf，只需将红色标示的部分改一下即可.
5.配置 VIP:
vim /etc/sysconfig/network-scripts/ifcfg-lo:0
DEVICE=lo:0
IPADDR=192.168.1.10
NETMASK=255.255.255.255
ONBOOT=yes
NAME=loopback
重启网卡，启动keepalived 显示如下成功！
6.配置ipvsadm（配置master和backup）
添加负载均衡器
/sbin/ipvsadm -A -t 192.168.1.10:80 -s rr
增加realserver
/sbin/ipvsadm -a –t 192.168.1.10:80 -r 192.168.1.50:80 -g   #192.168.1.50 是真实机的ip
/sbin/ipvsadm -a –t 192.168.1.10:80 -r 192.168.1.60:80 -g   #192.168.1.60 是真实机的ip
route  add -host 192.168.1.10 dev lo:0
 
7.配置realserver （web1和web2）
配置vip 地址
/sbin/ifconfig lo:0 192.168.1.10 netmask 255.255.255.255 broadcast 192.168.1.10 up
route add -host 192.168.1.10 dev lo:0
8.在realserver 安装测试httpd（只为显示结果）
 yum install httpd –y
service httpd start
vim /var/www/html/index.html
this is 192.168.1.50/60
9.在master负载均衡器上查看
[root@master ~]# ipvsadm -L -n
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
TCP  192.168.1.10:80 rr persistent 50
  -> 192.168.1.60:80              Route   1      0          0        
  -> 192.168.1.50:80              Route   100    0          0 
10．访问：192.168.1.10 出现一下表示安装成功

posted @ 2013-01-18 18:04  陳聽溪  阅读(281)  评论(0)    收藏  举报