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lvs DR配置 

server1:
首先，配置server机yum源 方便后期实验流畅
vim /etc/yum.repos.d/rhel-source.repo
[rhel-source]
name=Red Hat Enterprise Linux $releasever - $basearch - Source
baseurl=http://172.25.8.250/rhel6.5
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release

[LoadBalancer]
name=LoadBalancer
baseurl=http://172.25.8.250/rhel6.5/LoadBalancer
gpgcheck=0

[HighAvailability]
name=HighAvailability
baseurl=http://172.25.8.250/rhel6.5/HighAvailability
gpgcheck=0

[ResilientStorage]
name=ResilientStorage
baseurl=http://172.25.8.250/rhel6.5/ResilientStorage
gpgcheck=0

[ScalableFileSystem]
name=ScalableFileSystem
baseurl=http://172.25.8.250/rhel6.5/ScalableFileSystem
gpgcheck=0

yum install ipvsadm -y
ipvsadm -A -t 172.25.8.100:80 -s rr  　　　　　　 ##添加策略 指定vip 172.25.66.100:80，-t指tcp，-s rr 指定轮询

ipvsadm -a -t 172.25.0.100:80 -r 172.25.8.2:80 -g 　　 ##将虚拟ip映射到真实的ip，-r指定realserver -t指定tcp协议 -g指dr模式
ipvsadm -a -t 172.25.0.100:80 -r 172.25.8.3:80 -g
ipvsadm -l　　　　　　　　　　　　　　　　　　#列出策略
[root@server1 html]# ipvsadm -l
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
TCP  172.25.8.100:http rr
  -> server2:http                 Route   1      0          0        
  -> server3:http                 Route   1      0          0        

 

server2:
yum install httpd
vim /var/www/html/index.html
/etc/init.d/httpd start

 

server3:
yum install httpd
vim /var/www/html/index.html
/etc/init.d/httpd start

server1:
ip addr add  172.25.8.100/24 dev eth0    　　　　#添加一个虚拟ip
ip addr

server2:
ip addr add 172.25.8.100/32  dev lo
ip addr

 

server3:
ip addr add 172.25.8.100/32  dev lo
ip addr

物理机测试：
curl 172.25.8.100

[root@foundation8 ~]# curl 172.25.8.100
<h1>server3</h1>
[root@foundation8 ~]# curl 172.25.8.100
<h1>server2</h1>
[root@foundation8 ~]# curl 172.25.8.100
<h1>server3</h1>
[root@foundation8 ~]# curl 172.25.8.100
<h1>server2</h1>

为防止客户端在访问vip时直接访问到realserver，在realserver设置一定的策略
server2:
yum install arptables_jf
arptables -A IN -d 172.25.8.100 -j DROP
arptables -A OUT -s 172.25.8.100 -j mangle --mangle-ip-s 172.25.8.2
/etc/init.d/arptables_jf save

server3:
yum install arptables_jf
arptables -A IN -d 172.25.8.100 -j DROP
arptables -A OUT -s 172.25.8.100 -j mangle --mangle-ip-s 172.25.8.3
/etc/init.d/arptables_jf save

测试：
在物理机中
arp -d 172.25.8.100
curl 172.25.8.100
测试结果
[root@foundation8 ~]# curl 172.25.8.100
<h1>server3</h1>
[root@foundation8 ~]# curl 172.25.8.100
<h1>server2</h1>
[root@foundation8 ~]# curl 172.25.8.100
<h1>server3</h1>
[root@foundation8 ~]# curl 172.25.8.100
<h1>server2</h1>

 

 

server1：
yum install ldirectord-3.9.5-3.1.x86_64.rpm
cp /usr/share/doc/ldirectord-3.9.5/ldirectord.cf /etc/ha.d
cd /etc/ha.d/
vim ldirectord.cf

ipvsadm -C
 /etc/init.d/ldirectord start
yum install httpd
vim /var/www/html/index.html
/etc/init.d/httpd start

此时，当server3关闭httpd服务
结果如下
[root@foundation8 ~]# curl 172.25.8.100
<h1>server2</h1>
[root@foundation8 ~]# curl 172.25.8.100
<h1>server2</h1>
[root@foundation8 ~]# curl 172.25.8.100
<h1>server2</h1>

此时，当server2关闭httpd服务
结果如下
[root@foundation8 ~]# curl 172.25.8.100
维护中。。
[root@foundation8 ~]# curl 172.25.8.100
维护中。。

 

 

keepalived:

server1:
/etc/init.d/ldirectord stop
chkconfig  ldirectord off
下载keepalived-2.0.6.tar.gz
tar zxf keepalived-2.0.6.tar.gz
yum install rpm-build -y
yum install gcc -y
yum install openssl-devel -y
cd keepalived-2.0.6
[root@server1 keepalived-2.0.6]# ./configure --prefix=/usr/local/keepalived --with-init=SYSV
[root@server1 keepalived-2.0.6]# make
[root@server1 keepalived-2.0.6]# make install
cd /usr/local/keepalived/
[root@server1 keepalived]# ls
bin  etc  sbin  share
cd sbin/
ln -s /usr/local/keepalived/sbin/keepalived  /sbin/
cd etc/rc.d/init.d
chmod +x keepalived
ln -s /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/
cd etc/sysconfig
ln -s /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/
cd etc/keeplived
ln -s /usr/local/keepalived/etc/keepalived/ /etc/

cd /usr/local/
scp -r keepalived/ server:/usr/local/

yum install mailx -y
cd /etc/keeplived
vim keepalived.conf
截图
server4:
cd /usr/local/keeplived
ls

[root@server4 keepalived]# ln -s /usr/local/keepalived/sbin/keepalived  /sbin/
[root@server4 keepalived]# ln -s /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/
[root@server4 keepalived]# ln -s /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/
[root@server4 keepalived]#
mkdir /etc/keeplived
cd /etc/keepalived/
vim keepalived.conf
截图
yum install ipvsadm -y
scp server1:/etc/yum.repos.d/rhel-source.repo /etc/yum.repos.d/rhel-source.repo
 ipvsadm -l
截图

物理机测试
for i in range{1..6}; do curl 172.25.8.100;  done;
截图

将server1中keepalived关闭
server4会自动获取ip，同时访问正常
截图
截图

此时再将server1打开，ip又会回到server1中，因为server1的优先级比较高

server2:
yum install vsftpd -y
/etc/init.d/vsftpd start

server3:
yum install vsftpd -y
/etc/init.d/vsftpd start
cd /var/ftp
touch file

server1:
vim /etc/keepalived/keepalived.conf
在最下方添加
截图

ipvsadm -l
截图

server4：
vim /etc/keepalived/keepalived.conf
在最下方添加
截图

ipvsadm -l
截图

测试
物理机
for i in range{1..6}; do curl 172.25.8.100; done;
截图
 lftp 172.25.8.100
截图

互备：

server1:
vim /etc/keepalived/keepalived.conf
截图

server4：
vim /etc/keepalived/keepalived.conf
截图

server2:
[root@server2 ftp]# ip addr add 172.25.8.200/32 dev lo
[root@server2 ftp]# arptables -A IN -d 172.25.8.200 -j DROP
[root@server2 ftp]# arptables -A OUT -s 172.25.8.200 -j mangle --mangle-ip-s 172.25.8.2
[root@server2 ftp]# /etc/init.d/arptables_jf save

server3:
[root@server3 ftp]# ip addr add 172.25.8.200/32 dev lo
[root@server3 ftp]# arptables -A IN -d 172.25.8.200 -j DROP
[root@server3 ftp]# arptables -A OUT -s 172.25.8.200 -j mangle --mangle-ip-s 172.25.8.3
[root@server3 ftp]# /etc/init.d/arptables_jf save

测试
for i in range{1..6}; do curl 172.25.8.100; done;
截图

此时server1和server2互为主备
当server1或serever4任意一个over时
另一台会自动获取ip并提供服务