LVS-DR负载均衡-01

LVS-DR负载均衡-01
第一章  Web LVS 安装实施
 
2.1  软件测试环境部署
 
软件平台        Vmware workstation
系统平台        redhat  AS 5.4   32bit
Lvs 集群软件    ipvsadm v1.24
Keepalived      Keepalived v1.1.20
Web服务         Apache
 
 
2.2  服务器资源分配规划
 
集群角色     Master负载均衡器      Backup负载均衡器     真实服务器        真实服务器
主机名       Lvs_01                Lvs_02                Rs01             Rs02
Ip地址       192.168.28.132        192.168.28.133        192.168.28.134   192.168.28.135
Vip 虚拟IP   192.168.28.111
客户端       192.168.2.130(物理机客户端)
LVS 模式     DR模式
 
 
2.3准备实验环境
 
VMware Virtual Ethernet Adapter for VMnet8  配置IP 非DHCP，Vmnet1不做配置
物理地址: ‎00-50-56-C0-00-08
已启用 DHCP: 否
IPv4 地址: 192.168.28.244
IPv4 子网掩码: 255.255.255.0
IPv4 默认网关:
IPv4 DNS 服务器:
IPv4 WINS 服务器:
已启用 NetBIOS over Tcpip: 是
虚拟机网卡模式设置为NAT模式
 
 
 
 2.4  Apache WEB 服务器配置
使用RS（Real  Server）中系统自带apache服务 两台RS中分别编辑http.conf文件定义Documentroot 分别为：
01. /home/serv01/public_html    
02. /home/serv02/public_html
 
编辑执行 echo “192.168.18.134”>/home/serv01/public_html/index.html
         echo “192.168.18.135”>/home/serv02/public_html/index.html
分别启动apache服务
#service  httpd start
 
2.5 安装Ipvsadm
内核需求检查，要求linux内核版本在2.2.4以上
查看当前内核
[root@lvs_01 ~]# uname  -r
2.6.18-164.el5
下载ipvsadm编译安装要求与内核相对应的ipvsadm软件，通过ftp方式传入VS中
执行以下命令
[root@lvs_01 ~]# cd /usr/src
[root@lvs_01 ~]# tar zxvf ipvsadm-1.24.tar.gz
[root@lvs_01 ~]# ln -s kernels/2.6.18-164.el5-i686/   linux
[root@lvs_01 ~]# cd  ipvsadm-1.24
[root@lvs_01 ~]# make all                        #编译
[root@lvs_01 ~]# make install                     #安装
[root@lvs_01 ipvsadm-1.24] #  ipvsadm  --version   #查看版本
 
2.6 安装配置keepalived
 
下载tar包，在两台虚拟服务器中分别安装keepalived,安装步骤及其过程一致
 
[root@lvs_01 local]# cd /usr/src/
[root@lvs_01 local]#tar -xzvf keepalived-1.1.20.tar.gz
[root@lvs_01 local]#cd keepalived-1.1.20
[root@lvs_01 local]#./configure —prifix=  /etc/keepalived/
[root@lvs_01 local]#make && make
[root@lvs_01 local]#cd  /etc/keepalived
[root@lvs_01 local]#cp etc/rc.d/init.d/keepalived    /etc/rc.d/init.d/
[root@lvs_01 local]#cp etc/sysconfig/keepalived   /etc/sysconfig/
[root@lvs_01 local]#mkdir  /etc/keepalived
[root@lvs_01 local]#cp   etc/keepalived/keepalived.conf      /etc/keepalived
[root@lvs_01 local]#chkconfig —add keepalived
[root@lvs_01 local]#chkconfig –level 35 keepalived on
[root@lvs_01 local]#cp sbin/keepalived /sbin
 
2.7 配置keepalived
  编辑/etc/keepalived/keepalived.conf  配置文件
! Configuration File for keepalived
global_defs {
notification_email {
[email protected]
# [email protected]
# [email protected]
}
notification_email_from [email protected]
smtp_server 127.0.0.1
# smtp_connect_timeout 30
router_id LVS_DEVEL
}
 
# VIP1
vrrp_instance VI_1 {
state   MASTER                                 #备份服务器上将MASTER改为BACKUP
interface eth0
virtual_router_id 51
priority 100                                      #备份服务上将100改为99
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.28.111
                                               #(如果有多个VIP，继续换行填写.)
}
}
virtual_server 192.168.28.132 80 {
delay_loop 6                                    #(每隔6秒查询realserver状态)
lb_algo rr                                       # (lvs 算法)
lb_kind DR                                     # (Direct Route)
persistence_timeout 60                          # (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 192.168.28.134 80 {
weight 3                                       #(权重)
TCP_CHECK {
connect_timeout 10                            #(10秒无响应超时)
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
real_server 192.168.28.135 80 {
weight 3
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
}