[跟我学中小企业架构部署]之二：负载均衡部署

LB1 LB2 部署
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所需要软件：
ipvsadm-1.24.tar.gz
keepalived-1.1.18.tar.gz

mkdir –p /home/elain
cd /home/elain/

lsmod |grep ip_vs #检查是否存在ip_vs模块
uname –r #查看内核版本
tar zxvf ipvsadm-1.24.tar.gz
cd ipvsadm-1.24
ln -s /usr/src/kernels/2.6.18-164.el5-x86_64/ /usr/src/linux
make
make install
cd ..
find / -name ipvsadm #查看安装后路径，可选
/sbin/ipvsadm  #加载ip_vs模块
lsmod |grep ip_vs

若看到上面信息，则ip_vs模块加载成功
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keepalived-1.1.18安装
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tar zxvf keepalived-1.1.18.tar.gz
cd keepalived-1.1.18
./configure
make
make install
cd ..

cp /usr/local/etc/rc.d/init.d/keepalived /etc/rc.d/init.d/   #设置为service方式启动
cp /usr/local/etc/sysconfig/keepalived /etc/sysconfig/
mkdir /etc/keepalived
cp /usr/local/etc/keepalived/keepalived.conf /etc/keepalived/
cp /usr/local/sbin/keepalived /usr/sbin/
/etc/init.d/keepalived start   #启动keepalived
echo “/etc/init.d/keepalived start” >>/etc/rc.local  #添加为开机自启动
sed -i 's#net.ipv4.ip_forward = 0#net.ipv4.ip_forward = 1#' /etc/sysctl.conf  #开启内核转发功能
sysctl –p    #查看是否开启内核转发

mv /etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf.ori  #备份原始配置文件
vi /etc/keepalived/keepalived.conf   #分别在LB1,LB2上建立配置文件

#!/bin/bash
Configuration File for keepalived
global_defs {
notification_email {
[email protected]     #填写自己的邮箱出现故障接收报警邮件用
}
notification_email_from [email protected]
#smtp_server 192.168.200.1
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id LVS_01 #备份服务器改为LVS_02
}

vrrp_instance VI_1 {
state MASTER #备份服务器上MASTER为BACKUP

interface eth0
lvs_sync_daemon_inteface eth1
virtual_router_id 81
priority 100 #备份服务上优先级要低于100，如改为90
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}

virtual_ipaddress {
#192.168.200.16
10.0.0.80   #这里填写VIP地址，也可添加多个VIP
}
}

virtual_server 10.0.0.80 80 {   #这里填写VIP地址
delay_loop 6
lb_algo wrr
lb_kind DR
nat_mask 255.255.255.0
persistence_timeout 50
protocol TCP

real_server 10.0.0.83 80 { #这里是LAMP服务器对外的IP
weight 1
TCP_CHECK {
connect_timeout 8
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}

real_server 10.0.0.84 80 { #这里是LEMP对外的IP
weight 1
TCP_CHECK {
connect_timeout 8
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
}

注：以上keepalived.conf文件在LB1，LB2上都需建立；红色标记处，是在LB2使用该配置文件需修改的地方

/etc/init.d/keepalived restart

配置完毕！

使用 ip add 命令查看LB1的IP，若出现上图红圈标记的IP，即配置成功！

在LB2上还需配置LAMP测试环境：

此处参考下面要配置的LAMP环境即可！
 

转载请注明： 转载自http://www.elain.org

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