安装完系统后 发现缺少rz命令 快速安装一个
安装rz sz
yum -y install lrzsz
实验环境 centos 5.4
DR-master=192.168.0.35
DR-backup=192.168.0.36
虚拟VIP=192.168.0.100
web1=192.168.0.39
web2=192.168.0.40
创建软连接，否则make时会报错
ln -s /usr/src/kernels/2.6.18-164.el5-x86_64/ /usr/src/linux
tar -zxvf ipvsadm-1.24.tar.gz 解压
cd ipvsadm-1.24
make
make install
看下ipvsadm 路径
find / -name ipvsadm
tar -zxvf keepalived-1.1.17.tar.gz
cd keepalived-1.1.17
./configure
configure: error:
!!! OpenSSL is not properly installed on your system. !!!
!!! Can not include OpenSSL headers files.
解决办法：
yum -y install openssl-devel
./configure
make
make install
------------------------
Keepalived version : 1.1.17
Compiler : gcc
Compiler flags : -g -O2
Extra Lib : -lpopt -lssl -lcrypto
Use IPVS Framework : Yes
IPVS sync daemon support : Yes
Use VRRP Framework : Yes
Use LinkWatch : No
Use Debug flags : No
8、开启负载服务器路由机制 //master和backup
# vi /etc/sysctl.conf 保证有如下内容
把 net.ipv4.ip_forward = 0
改为 net.ipv4.ip_forward = 1
执行
# sysctl -p
“======================= 配置keepalived ===========================
cp /usr/local/etc/rc.d/init.d/keepalived /etc/rc.d/init.d/
cp /usr/local/etc/sysconfig/keepalived /etc/sysconfig/
mkdir /etc/keepalived
cp /usr/local/sbin/keepalived /usr/sbin/
vi /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
34621926@qq.com
}
notification_email_from 34621926@qq.com
smtp_server smtp.qq.com
# 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
lvs_sync_daemon_inteface eth0
virtual_router_id 51
priority 100 # 备份服务上将100改为90
advert_int 5
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.0.100
#(如果有多个VIP，继续换行填写.)
}
}
virtual_server 192.168.0.100 80 {
delay_loop 6 #(每隔10秒查询realserver状态)
lb_algo wlc #(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 192.168.0.39 80 {
weight 100 #(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 192.168.0.40 80 {
weight 100
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
}
/etc/init.d/keepalived start
编写dr脚本
vi /sbin/lvsdr.sh
#!/bin/bash
GW=192.168.0.250
VIP=192.168.0.100
RIP1=192.168.0.39
RIP2=192.168.0.40
/etc/rc.d/init.d/functions
case "$1" in
start)
echo "start LVS of DirectorServer"
#Set the Virtual IP Address
/sbin/ifconfig eth0:1 $VIP broadcast $VIP netmask 255.255.255.255 up
/sbin/route add -host $VIP dev eth0:1
#Clear IPVS Table
/sbin/ipvsadm -C
#Set Lvs
/sbin/ipvsadm -A -t $VIP:80 -s wrr -p 3
/sbin/ipvsadm -a -t $VIP:80 -r $RIP1:80 -g -w 1
/sbin/ipvsadm -a -t $VIP:80 -r $RIP2:80 -g -w 1
#Run Lvs
/sbin/ipvsadm
;;
stop)
echo "Close LVS Directorserver"
/sbin/ifconfig eth0:1 down
/sbin/ipvsadm -C
;;
*)
echo "Usage0{start|stop}"
exit 1
esac
chmod 755 /sbin/lvsdr.sh
/sbin/lvsdr.sh start
看route -n 是否多了 eth0:1的路由
==============================配置后端web服务器=============================
在192.168.0.39和192.168.0.40上分别建立如下脚本
vi /sbin/realdr.sh
#!/bin/bash
VIP=192.168.0.100
/sbin/ifconfig lo:0 $VIP broadcast $VIP netmask 255.255.255.255 up
/sbin/route add -host $VIP dev lo:0
echo "1">/proc/sys/net/ipv4/conf/default/arp_ignore
echo "2">/proc/sys/net/ipv4/conf/default/arp_announce
echo "1">/proc/sys/net/ipv4/conf/all/arp_ignore
echo "2">/proc/sys/net/ipv4/conf/all/arp_announce
sysctl -p
chmod 755 /sbin/realdr.sh
在两台web服务器上分别执行其指命。
/sbin/realdr.sh start
[root@localhost ~]# /sbin/realdr.sh start
vi /etc/rc.local //里面添加
/etc/init.d/keepalived restart
/sbin/lvsdr.sh start
