- 准备工作，配置高可用yum源
-
# Main rhel6.5 server[base]name=Instructor Server Repositorybaseurl=http://172.25.254.250/rhel6.5gpgcheck=1 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release # LoadBalancer packages [LoadBalancer] name=Instructor LoadBalancer Repository baseurl=http://172.25.254.250/rhel6.5/LoadBalancer gpgcheck=1 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release # ResilientStorage [ResilientStorage] name=Instructor ResilientStorage Repository baseurl=http://172.25.254.250/rhel6.5/ResilientStorage gpgcheck=1 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release # ScalableFileSystem [ScalableFileSystem] name=Instructor ScalableFileSystem Repository baseurl=http://172.25.254.250/rhel6.5/ScalableFileSystem gpgcheck=1 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release
- 两台keepalived安装相关组件?
yum install ipvsadm kernel--xen--devel kernel-devel -y
wget http://www.keepalived.org/software/keepalived-1.1.17.tar.gz
tar zxf keepalived-1.1.17.tar.gz
cd keepalived-1.1.17
./configure ----prefix=/usr/local/keepalived ----with--kernel--dir=/kernels/2.6.18-92.。。。 这个目录要安装kernel-devel 哦自己tab
make && make instal
ln --s /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/
ln -s /usr/local/keepalived/sbin/keepalived /usr/sbin/
ln --s /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/
ln --s /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/
3.vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
[email protected]
}
notification_email_from [email protected]
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id LVS_DEVEL
}
vrrp_instance VI_1 {
state MASTER //备用机写BACKUP
interface eth0
virtual_router_id 51
priority 150 //权值 BACKUP的要比这小
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
172.25.254.100
}
}
virtual_server 172.25.254.100 80 {
delay_loop 6
lb_algo rr
lb_kind DR //采用路由直连
nat_mask 255.255.255.0
protocol TCP
real_server 172.25.254.1 80 {
weight 1
TCP_CHECK{
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
real_server 172.25.254.2 80 {
weight 1
TCP_CHECK{
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
}
4.后端realserver上执行脚本
#!/bin/bash
# description: Config realserver lo and apply noarp
SNS_VIP=172.25.254.100
/etc/rc.d/init.d/functions
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
分别启动realserver的httpd服务整个主页随便hostname什么的测试就可以了
测试方法：在有VIP的主机上 ipvsadm 查看
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 172.25.254.100:http rr
-> server1.example.com:http Route 1 0 0
-> server2.example.com:http Route 1 0 0
web访问vip 主页来回切换
关闭server2的httpd服务
web访问VIP 直接转到了server1
关闭一台机子的keepalived服务 vip迁移 另一台机子 ipvsadm 出现数据
就是这样keepalived+lvs负载均衡集群到此搭建完成