yum -y install httpd 的方式安装好httpd服务。
分别在192.168.1.103和192.168.1.104上做如下操作:
[root@centos ~]# yum -y install httpd
echo 103 >/var/www/html/index.html #(104上的要把 103字段改成 104)
[root@centos ~]# setenforce 0 #关闭SELinux
[root@centos ~]# /etc/rc.d/init.d/iptables stop #关闭防火墙
4、开始安装LVS
下载相关软件包:
[root@centos1 ~]# mkdir download
[root@centos1 ~]# cd download/
[root@centos1 download]# wget http://www.linuxvirtualserver.org/software/kernel-2.6/ipvsadm-1.24.tar.gz
5、安装命令
注:以下安装需要在192.168.1.101和192.168.1.104上面操作:
[root@centos1 download]# uname -r #查看linux内核版本
2.6.32-220.el6.x86_64
[root@centos1 download]# ln -s /usr/src/kernels/2.6.32-220.el6.x86_64/ /usr/src/linux #不做此步骤,安装会报错
注:此ln命令的路径要和uname -r输出内核版本一致,如果没有 /usr/src/kernels/2.6.32-220.el6.x86_64/ 需要安装 kernel-devel软件包。
[root@centos1 download]# tar zxvf ipvsadm-1.24.tar.gz
[root@centos1 download]# cd ipvsadm-1.24
[root@centos1 ipvsadm-1.24]# make
[root@centos1 ipvsadm-1.24]# make install
[root@centos1 ipvsadm-1.24]# ipvsadm #执行ipvsadm命令,把LVS添加到linux内核中
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
[root@centos1 ipvsadm-1.24]# lsmod | grep ip_vs #查看LVS是否已经添加到linux内核了,如果有如下输出表示已经成功。
ip_vs 108133 0
ipv6 322029 154 ip_vs,ip6t_REJECT,nf_conntrack_ipv6,nf_defrag_ipv6
6配置LVS 服务端
在192.168.1.101和192.168.1.114上分别配置LVS DR模式
1)、配置LVS,建立一个脚本配置LVS
注:192.168.1.101和192.168.1.114上配置都是一样的
[root@centos1 bin]# vim lvs_dr.sh
#!/bin/bash
. /etc/init.d/functions
vim lvs_dr.sh
#!/bin/bash
GW=192.168.1.1
# website director vip.
SNS_VIP=192.168.1.181
SNS_RIP1=192.168.1.103
SNS_RIP2=192.168.1.104
logger $0 called with $1
case "$1" in
start)
# set squid vip
/sbin/ipvsadm --set 30 5 60
/sbin/ifconfig eth0:0 $SNS_VIP broadcast $SNS_VIP netmask 255.255.255.255 up
/sbin/route add -host $SNS_VIP dev eth0:0
/sbin/ipvsadm -A -t $SNS_VIP:80 -s wrr -p 3
/sbin/ipvsadm -a -t $SNS_VIP:80 -r $SNS_RIP1:80 -g -w 1
/sbin/ipvsadm -a -t $SNS_VIP:80 -r $SNS_RIP2:80 -g -w 1
touch /var/lock/subsys/ipvsadm >/dev/null 2>&1
;;
stop)
/sbin/ipvsadm -C
/sbin/ipvsadm -Z
ifconfig eth0:0 down
ifconfig eth0:1 down
route del $SNS_VIP
route del $SS_VIP
rm -rf /var/lock/subsys/ipvsadm >/dev/null 2>&1
echo "ipvsadm stoped"
;;
status)
if [ ! -e /var/lock/subsys/ipvsadm ];then
echo "ipvsadm stoped"
exit 1
else
echo "ipvsadm OK"
fi
;;
*)
echo "Usage: $0 {start|stop|status}"
exit 1
esac
exit 0
[root@centos1 bin]# chmod +x lvs_dr.sh
[root@centos1 bin]# cp lvs_dr.sh /etc/rc.d/init.d/ #方便启动
[root@centos1 bin]# service lvs_dr.sh start #启动lvs服务
用ipvsadm -Ln 命令查看是否有如下输出,如有证明LVS配置成功
[root@centos1 bin]# ipvsadm
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 192.168.1.181:http wrr persistent 3
-> 192.168.1.104:http Route 1 0 0
-> 192.168.1.103:http Route 1 0 0
7、配置LVS RS服务器
[root@centos bin]# vim lvs_dr.sh
#!/bin/bash
. /etc/init.d/functions
SNS_VIP=192.168.1.181
case "$1" in
start)
ifconfig lo:0 $SNS_VIP netmask 255.255.255.255 broadcast $SNS_VIP
/sbin/route add -host $SNS_VIP dev lo:0
echo "1" >/proc/sys/net/ipv4/conf/lo/arp_ignore
echo "2" >/proc/sys/net/ipv4/conf/lo/arp_announce
echo "1" >/proc/sys/net/ipv4/conf/all/arp_ignore
echo "2" >/proc/sys/net/ipv4/conf/all/arp_announce
sysctl -p >/dev/null 2>&1
echo "RealServer Start OK"
;;
stop)
ifconfig lo:0 down
route del $SNS_VIP >/dev/null 2>&1
echo "0" >/proc/sys/net/ipv4/conf/lo/arp_ignore
echo "0" >/proc/sys/net/ipv4/conf/lo/arp_announce
echo "0" >/proc/sys/net/ipv4/conf/all/arp_ignore
echo "0" >/proc/sys/net/ipv4/conf/all/arp_announce
echo "RealServer Stoped"
;;
*)
echo "Usage: $0 {start|stop}"
exit 1
esac
exit 0
[root@centos bin]# cp lvs_dr.sh /etc/rc.d/init.d/
[root@centos bin]# service lvs_dr.sh start #启动lvs RS服务器
RealServer Start OK
yum install -y keepalived
global_defs {
notification_email {
[email protected]
}
notification_email_from [email protected]
smtp_server 192.168.80.1
smtp_connection_timeout 30
router_id LVS_DEVEL # 设置lvs的id,在一个网络内应该是唯一的
}
vrrp_instance VI_1 {
state MASTER #指定Keepalived的角色,MASTER为主,BACKUP为备
interface eth1 #指定Keepalived的角色,MASTER为主,BACKUP为备
virtual_router_id 51 #虚拟路由编号,主备要一致
priority 100 #定义优先级,数字越大,优先级越高,主DR必须大于备用DR
advert_int 1 #检查间隔,默认为1s
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.80.200 #定义虚拟IP(VIP)为192.168.2.33,可多设,每行一个
}
}
# 定义对外提供服务的LVS的VIP以及port
virtual_server 192.168.80.200 80 {
delay_loop 6 # 设置健康检查时间,单位是秒
lb_algo wrr # 设置负载调度的算法为wlc
lb_kind DR # 设置LVS实现负载的机制,有NAT、TUN、DR三个模式
nat_mask 255.255.255.0
persistence_timeout 0
protocol TCP
real_server 192.168.80.102 80 { # 指定real server1的IP地址
weight 3 # 配置节点权值,数字越大权重越高
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
real_server 192.168.80.103 80 { # 指定real server2的IP地址
weight 3 # 配置节点权值,数字越大权重越高
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
}
3.5 配置从负载服务器
从负载服务器与主负载服务器大致相同,只是在keepalived的配置文件中需要改以下两处:
(1)将state由MASTER改为BACKUP
(2)将priority由100改为99
vrrp_instance VI_1 {
state BACKUP # 这里改为BACKUP
interface eth1
virtual_router_id 51
priority 99 # 这里改为99,master优先级是100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.80.200
}
}