CentOS6.5高可用集群LVS+Keepalived(DR模式)

[root@localhost ~]# yum install-y gcc gcc-c++ makepcre pcre-devel kernel-devel openssl-devel libnl-devel popt-devel

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wget http://www.linuxvirtualserver.org/software/kernel-2.6/ipvsadm-1.26.tar.gz

tar zxvf ipvsadm-1.26.tar.gz

cd ipvsadm-1.26

make && make install

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wget http://www.keepalived.org/software/keepalived-1.2.7.tar.gz

tar zxvf keepalived-1.2.7.tar.gz

cd keepalived-1.2.7

./configure --prefix=/usr/local/keepalived

make && make install

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cp /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/

cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/

mkdir /etc/keepalived/

cp /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/

cp /usr/local/keepalived/sbin/keepalived /usr/sbin/

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[root@localhost ~]# vi /etc/keepalived/keepalived.conf

! Configuration File forkeepalived

global_defs {

notification_email {

test@sina.com            #故障接受联系人

 }

notification_email_from admin@test.com   #故障发送人

smtp_server 127.0.0.1    #本机发送邮件

smtp_connect_timeout 30

router_id LVS_MASTER     #BACKUP上修改为LVS_BACKUP

 }

vrrp_instance VI_1 {

state MASTER             #BACKUP上修改为BACKUP

interface eth0

virtual_router_id 51     #虚拟路由标识，主从相同

priority 100             #BACKUP上修改为90

advert_int 1

authentication {

auth_type PASS

auth_pass 1111           #主从认证密码必须一致

 }

virtual_ipaddress {      #Web虚拟IP（VTP）

172.0.0.10

  }

 }

virtual_server 172.0.0.10 80 { #定义虚拟IP和端口

delay_loop 6    #检查真实服务器时间，单位秒

lb_algo rr      #设置负载调度算法，rr为轮训

lb_kind DR      #设置LVS负载均衡DR模式

persistence_timeout 50 #同一IP的连接60秒内被分配到同一台真实服务器

protocol TCP    #使用TCP协议检查realserver状态

real_server 172.0.0.13 80 {  #第一个web服务器

weight 3          #节点权重值

TCP_CHECK {       #健康检查方式

connect_timeout 3 #连接超时

nb_get_retry 3    #重试次数

delay_before_retry 3  #重试间隔/S

  }

}

real_server 172.0.0.14 80 {  #第二个web服务器

weight 3

TCP_CHECK {

connect_timeout 3

nb_get_retry 3

delay_before_retry 3

     }

  }

}

[root@localhost ~]# service keepalived restart #启动keepalived

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[root@localhost ~]# vi /etc/init.d/real.sh

#description : start realserver

VIP=172.0.0.10

. /etc/init.d/functions

case "$1" in

start)

/sbin/ifconfig lo:0 $VIP broadcast $VIP netmask 255.255.255.255 up

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

echo "LVS RealServer Start OK"

;;

stop)

/sbin/ifconfig lo:0 down

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 "LVS RealServer Stoped OK"

;;

*)

echo "Usage: $0 {start|stop}"

exit 1

esac

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[root@localhost ~]# chmod +x /etc/init.d/real.sh

[root@localhost ~]# /etc/init.d/real.sh start

LVS RealServer Start OK

[root@localhost ~]# echo "/etc/init.d/real.sh start" >> /etc/rc.local

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[root@localhost ~]# service httpd start

[root@localhost ~]# echo “192.168.0.30″ > /var/www/html/index.html

[root@localhost ~]# echo “192.168.0.40″ > /var/www/html/index.html

[root@localhost ~]# service iptables stop  #关闭防火墙

[root@localhost ~]# setenforce 0  #临时关闭selinux