Keepalived+LVS-DR模式配置高可用负载均衡集群
时间:2015-03-14 21:39 来源:linux.it.net.cn 作者:IT
环境: 虚拟机:VMware Workstation
操作系统:CentOS 5.5
一、keepalived+lvs-DR模式配置高可用负载均衡
拓扑如下：
二、服务器ip配置信息
1. ip_lb 主机(master) :
2.ip_lb_2 主机 (backup)
3.web1 主机
4.web2 主机
三、在master和backup分别查看是否有ipvsadm软件
1. 检查ipvsadm是否安装成功.可以直接输入
[root@localhost ~]# ipvsadm
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
2. 检查模版是否加入内核
[root@localhost ~]# lsmod |grep ip_vs
ip_vs 78081 0
四、分别在web1和web2上面安装apache服务.
# 安装apache服务不说明了. 开放的端口是:8099
五、在master主机(192.168.96.2)和backup主机(192.168.96.22)上安装keepalived
1. keepalived-1.2.1.tar.gz # 解压这个文件并且安装 (tar -zxvf keepalived-1.2.1.tar.gz)
2. ./configure --prefix=/home/keepalived/ --with-kernel-dir=/usr/src/kernels/2.6.18-164.el5-i686
3.make
4.make install
5.配置文件的路径
cp /home/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/
cp /home/keepalived/etc/sysconfig/keepalived /etc/sysconfig/
cp /home/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/
cp /home/keepalived/sbin/keepalived /sbin/
6.配置keepalived.conf文件.( ip_lb 主机<master> )
vim /etc/keepalived/keepalived.conf
-
#global define
-
global_defs {
-
router_id LVS_T1
-
}
-
-
-
vrrp_sync_group bl_group {
-
group {
-
bl_one
-
}
-
}
-
-
vrrp_instance bl_one {
-
state MASTER
-
interface eth0
-
lvs_sync_daemon_interface eth0
-
virtual_router_id 38
-
priority 150
-
advert_int 3
-
authentication {
-
auth_type PASS
-
auth_pass 1111
-
}
-
virtual_ipaddress {
-
192.168.96.100
-
}
-
}
-
-
-
virtual_server 192.168.96.100 8099 {
-
delay_loop 3
-
lb_algo rr
-
lb_kind DR
-
persistence_timeout 1
-
protocol TCP
-
-
-
real_server 192.168.96.33 8099 {
-
weight 1
-
TCP_CHECK {
-
connect_timeout 10
-
nb_get_retry 3
-
delay_before_retry 3
-
connect_port 8099
-
}
-
-
}
-
-
real_server 192.168.96.4 8099 {
-
weight 1
-
TCP_CHECK {
-
connect_timeout 10
-
nb_get_retry 3
-
delay_before_retry 3
-
connect_port 8099
-
}
-
}
-
}
7、配置keepalived.conf文件.(ip_lb_2 主机 <backup> )
vim /etc/keepalived/keepalived.conf
-
#global define
-
global_defs {
-
router_id LVS_T2
-
}
-
-
-
vrrp_sync_group bl_group {
-
group {
-
bl_one
-
}
-
}
-
-
vrrp_instance bl_one {
-
state BACKUP
-
interface eth0
-
lvs_sync_daemon_interface eth0
-
virtual_router_id 38
-
priority 120
-
advert_int 3
-
authentication {
-
auth_type PASS
-
auth_pass 1111
-
}
-
virtual_ipaddress {
-
192.168.96.100
-
}
-
}
-
-
-
virtual_server 192.168.96.100 8099 {
-
delay_loop 3
-
lb_algo rr
-
lb_kind DR
-
persistence_timeout 1
-
protocol TCP
-
-
-
real_server 192.168.96.33 8099 {
-
weight 1
-
TCP_CHECK {
-
connect_timeout 10
-
nb_get_retry 3
-
delay_before_retry 3
-
connect_port 8099
-
}
-
-
}
-
-
real_server 192.168.96.4 8099 {
-
weight 1
-
TCP_CHECK {
-
connect_timeout 10
-
nb_get_retry 3
-
delay_before_retry 3
-
connect_port 8099
-
}
-
}
-
}
8. 分别在主备上启动keepalived
[root@ip_lb home]# /etc/init.d/keepalived start
Starting keepalived: [ OK ]
[root@ip_lb home]# tail -f /var/log/message
# PS:这里说的LVS.并不是用ipvsadm软件配置.而是直接用keepalived的virtual_server配置项控制的.
# 安装ipvsadm只是可以看到负载状况.其实只需要keepalived也可以实现负载均衡集群.
六、在web1和web2主机上配置LVS-DR的相关配置.
1. vim /etc/init.d/lvsDR_node （web1主机）
-
#! /bin/sh
-
# descript : start real server DR
-
VIP=192.168.96.100
-
. /etc/rc.d/init.d/functions
-
case "$1" in
-
start)
-
echo "start LVS of RealServer DR"
-
/sbin/ifconfig lo:0 $VIP broadcast $VIP netmask 255.255.255.255 up
-
echo "1" > /proc/sys/net/ipv4/conf/all/arp_ignore
-
echo "2" > /proc/sys/net/ipv4/conf/all/arp_announce
-
;;
-
stop)
-
/sbin/ifconfig lo:0 down
-
echo "close LVS of RealServer DR"
-
echo "0" > /proc/sys/net/ipv4/conf/all/arp_ignore
-
echo "0" > /proc/sys/net/ipv4/conf/all/arp_announce
-
;;
-
*)
-
echo "Usage : $0 {start|stop}"
-
exit 1
-
esac
2. 把这个文件复制到web2主机上.
3. 在web1和web2上分别启动这个脚本:
/etc/init.d/lvsDR_node start
七、web1和web2主机上开启httpd服务.
/etc/init.d/httpd start
# ================= TEST =======================================
八、测试是否可以负载均衡.
编写测试脚本:
-
#! /bin/sh
-
for((i=1;i<=100;i++));do
-
curl http://192.168.96.100:8099 >> /tmp/q;
-
done
结果:
九、测试断开一个web服务或加入一个web服务
现在关闭 web2主机(192.168.96.4) 的web 服务..
查看日志可以看到:
现在再把 web2主机(192.168.96.4)的web 服务加入进来:
查看日志可以看到:
十、 测试HA
现在模拟主(master)的keepalived主机死掉.
备机的日志文件:
可以看到备机的keepalived已经开始工作....
整个部署就完成了.
官方参考中文文档:http://www.keepalived.org/pdf/sery-lvs-cluster.pdf
(责任编辑：IT)
环境: 虚拟机:VMware Workstation
操作系统:CentOS 5.5
一、keepalived+lvs-DR模式配置高可用负载均衡 拓扑如下：
二、服务器ip配置信息 1. ip_lb 主机(master) :
2.ip_lb_2 主机 (backup)
3.web1 主机
4.web2 主机
三、在master和backup分别查看是否有ipvsadm软件 1. 检查ipvsadm是否安装成功.可以直接输入 [root@localhost ~]# ipvsadm
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
2. 检查模版是否加入内核
[root@localhost ~]# lsmod |grep ip_vs
ip_vs 78081 0
四、分别在web1和web2上面安装apache服务. # 安装apache服务不说明了. 开放的端口是:8099 五、在master主机(192.168.96.2)和backup主机(192.168.96.22)上安装keepalived 1. keepalived-1.2.1.tar.gz # 解压这个文件并且安装 (tar -zxvf keepalived-1.2.1.tar.gz) 2. ./configure --prefix=/home/keepalived/ --with-kernel-dir=/usr/src/kernels/2.6.18-164.el5-i686 3.make 4.make install 5.配置文件的路径 cp /home/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/ cp /home/keepalived/etc/sysconfig/keepalived /etc/sysconfig/ cp /home/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/ cp /home/keepalived/sbin/keepalived /sbin/ 6.配置keepalived.conf文件.( ip_lb 主机<master> ) vim /etc/keepalived/keepalived.conf
7、配置keepalived.conf文件.(ip_lb_2 主机 <backup> ) vim /etc/keepalived/keepalived.conf
8. 分别在主备上启动keepalived [root@ip_lb home]# /etc/init.d/keepalived start Starting keepalived: [ OK ] [root@ip_lb home]# tail -f /var/log/message # PS:这里说的LVS.并不是用ipvsadm软件配置.而是直接用keepalived的virtual_server配置项控制的. # 安装ipvsadm只是可以看到负载状况.其实只需要keepalived也可以实现负载均衡集群. 六、在web1和web2主机上配置LVS-DR的相关配置. 1. vim /etc/init.d/lvsDR_node （web1主机）
2. 把这个文件复制到web2主机上. 3. 在web1和web2上分别启动这个脚本: /etc/init.d/lvsDR_node start 七、web1和web2主机上开启httpd服务. /etc/init.d/httpd start # ================= TEST ======================================= 八、测试是否可以负载均衡. 编写测试脚本:
结果: 九、测试断开一个web服务或加入一个web服务 现在关闭 web2主机(192.168.96.4) 的web 服务.. 查看日志可以看到: 现在再把 web2主机(192.168.96.4)的web 服务加入进来: 查看日志可以看到: 十、 测试HA 现在模拟主(master)的keepalived主机死掉. 备机的日志文件: 可以看到备机的keepalived已经开始工作.... 整个部署就完成了. 官方参考中文文档:http://www.keepalived.org/pdf/sery-lvs-cluster.pdf (责任编辑：IT) |