#######keepdalived+lvs################
########keepalived安装################
######内核结合否则不能vrrp#### ln -s /usr/src/kernels/2.6.18-194.el5-i686/ /usr/src/linuxyum -y install yum-fastestmirror
yum -y install gcc ###在编译时，keepalived+lvs依赖openssl和内核源代码 ###### yum -y install openssl-devel kernel-develln -s /usr/src/kernels/2.6.18-308.11.1.el5-i686/ /usr/src/linux
wget
tar zxvf keepalived-1.1.19.tar.gz
cd keepalived-1.1.19
./configure --prefix=/usr/local/keepalived/###前三项 Use IPVS Framework ,IPVS sync daemon support,Use VRRP Framework为yes 编译成功##########
make
make installcp /usr/local/keepalived/sbin/keepalived /usr/sbin/ ###命令
cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/ ###配置文件 cp /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/ ###启动项 chkconfig --level 35 keepalived on mkdir /etc/keepalived vi /etc/keepalived/keepalived.confglobal_defs {
notification_email {
}
notification_email_from
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id test1
}
vrrp_instance VI_1 {
state BACKUP
interface eth0
virtual_router_id 51
priority 100 #权重
advert_int 1 #检测间隔
nopreempt #不抢占smtp_alert
authentication {
auth_type PASS
auth_pass 123
}
virtual_ipaddress {
192.168.1.100 #虚拟IP
}
}
########## WEB负载均衡############# virtual_server 192.168.1.100 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 192.168.1.80 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 192.168.1.81 80 { weight 100 TCP_CHECK { connect_timeout 10 nb_get_retry 3 delay_before_retry 3 connect_port 80 } } }############# LVS 安装##############
wget
tar -zxvf ipvsadm-1.24.tar.gz
cd ipvsadm-1.24
make make install###若ipvsadm 能查看则证明安装成功
###ip a 查看虚拟IP###########在备用服务器上########
如复制虚拟机网卡不能启动,则删除ifcfg-eth0 中的HWADDR(网卡MAC) priority 90 #权重###若要双方不抢占,则双方都要关闭防火墙 iptales -F
或者,iptables命令双方添加组播地址:iptables -I RH-Firewall-1-INPUT -d 224.0.0.18 -j ACCEPT (若重启iptables 会失效)#####在每一台real上运行增加lookup#####
vi /root/lvs.sh#!/bin/bash
SNS_VIP=192.168.1.100 ###虚拟IP
/etc/rc.d/init.d/functions case "$1" in start) /sbin/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) /sbin/ifconfig lo:0 down /sbin/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