LVS+keepalived+tomcat负载均衡
LVS+keepalived+tomcat负载均衡
一：环境
System：centos 6.5 x86_64
| 名称 |
IP |
| LVS-Master |
192.168.10.98 |
| LVS-BACKUP |
192.168.10.99 |
| LVS-VIP |
192.168.10.97 |
| Realserver1 |
192.168.10.98 |
| Realserver2 |
192.168.10.99 |
| |
|
二：LVS+keepalived+tomcat的安装和配置
1.相关软件的安装
[root@tomcat-cluster1 ~]# yum -y install ipvsadm
[root@tomcat-cluster1 ~]# yum -y install keepalived
[root@tomcat-cluster1 ~]#wget
http://mirror.esocc.com/apache/tomcat/tomcat-7/v7.0.53/bin/apache-tomcat-7.0.53.tar.gz
[root@tomcat-cluster1 ~]#tar -zxvfapache-tomcat-7.0.53.tar.gz
[root@tomcat-cluster1 ~]# mv apache-tomcat-7.0.53 tomcat
=============================================================
[root@tomcat-cluster2 ~]# yum -y install ipvsadm
[root@tomcat-cluster2 ~]# yum -y install keepalived
[root@tomcat-cluster2 ~]#wget
http://mirror.esocc.com/apache/tomcat/tomcat-7/v7.0.53/bin/apache-tomcat-7.0.53.tar.gz
[root@tomcat-cluster2 ~]#tar -zxvfapache-tomcat-7.0.53.tar.gz
[root@tomcat-cluster2 ~]# mv apache-tomcat-7.0.53 tomcat
2..配置软件
配置keepadlived
global_defs {
notification_email {
[email protected] #email 通知
}
notification_email_from [email protected]
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id LVS1 # 设置lvs的id，在一个网络内应该是唯一的
}
vrrp_sync_group test { #设置vrrp组
group {
loadbalance
}
}
vrrp_instance loadbalance {
state MASTER #设置lvs的状态，报错MASTER和BACKUP两种，必须大写
interface eth0 #设置对外服务的接口
lvs_sync_daemon_inteface eth0 #设置lvs监听的接口
virtual_router_id 51 #设置虚拟路由表示
priority 180 #设置优先级，数值越大，优先级越高
advert_int 5 #设置同步时间间隔
authentication { #设置验证类型和密码
auth_type PASS
auth_pass 1111
}
virtual_ipaddress { #设置lvs vip
192.168.10.97
}
}
virtual_server 192.168.10.97 8080 {
delay_loop 6 #健康检查时间间隔
lb_algo rr #负载均衡调度算法
lb_kind DR #负载均衡转发规则
#persistence_timeout 20 #设置会话保持时间，对bbs等很有用
protocol TCP #协议
real_server 192.168.10.98 8080 {
weight 3 #设置权重
TCP_CHECK {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
connect_port 8080
}
}
real_server 192.168.10.99 8080 {
weight 3
TCP_CHECK {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
connect_port 8080
}
}
}
LVS-backup的配置文件如下
global_defs {
notification_email {
}
notification_email_from [email protected]
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id LVS2
}
vrrp_sync_group test {
group {
loadbalance
}
}
vrrp_instance loadbalance {
state BACKUP
interface eth0
lvs_sync_daemon_inteface eth0
virtual_router_id 51
priority 150
advert_int 5
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.10.97
}
}
virtual_server 192.168.10.97 8080 {
delay_loop 6
lb_algo rr
lb_kind DR
#persistence_timeout 20
protocol TCP
real_server 192.168.10.98 8080 {
weight 3
TCP_CHECK {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
real_server 192.168.10.99 8080 {
weight 3
TCP_CHECK {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
connect_port 8080
}
}
}
Realserver的配置
两台Realserver的脚本都一样
cat /etc/rc.d/init.d/realserver.sh
#!/bin/bash
# description: Config realserver lo and apply noarp
SNS_VIP=192.168.1.115
/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
测试
Tomcat测试
修改
==========================
[root@tomcat-cluster1 ~]# cat tomcat/webapps/examples/index.html |grep h3
<h3>Apache Tomcat Examples</H3>
<h3>This is tomcat-cluster1 page!!!<H3>
========================================
[root@tomcat-cluster2 ~]# cat tomcat/webapps/examples/index.html |grep h3
<h3>Apache Tomcat Examples</H3>
<h3>This is tomcat-cluster2 page!!!<H3>
访问：
http://192.168.10.99:8080/examples/
Apache Tomcat Examples
This is tomcat-cluster2 page!!!
http://192.168.10.98:8080/examples/
Apache Tomcat Examples
This is tomcat-cluster1 page!!!
one:
1) 首先测试各个readserver，确定各个readserver都能正常访问，测试realserver.sh脚本，看启动后 能不能绑定lvs vip，停止后能不能去除绑定的vip
2) 测试lvs能否进行负载均衡转发，利用ipvsadm命令查看，如果想只当当前的 请求转发到哪个服务器去了，可以用ipvsadm加选项来查看，其完整形式为：ipvsadm –lcn | grep 192.168.0.97
3) 停掉主lvs看lvs backup是否接管！
4) 更详细信息请查看日志，tail -f /var/log/messages
tow:
访问vip地址如果显示
This is tomcat-cluster2 page!!!
1) 停掉tomcat 99服务器，这时服务正常会切换到tomcat98服务器，显示
This is tomcat-cluster1 page!!!
访问vip地址如果显示
This is tomcat-cluster1 page!!!
1) 停掉tomcat 98服务器，这时服务正常会切换到tomcat99服务器，显示
This is tomcat-cluster2 page!!!
这次tomcat负载均衡集群服务器的高可用就成功了。