基于memcached、nginx的tomcat负载均衡和集群

先说明一下测试环境:

tomcat1、nginx、memcached安装在192.168.1.11

tomcat2安装在192.168.1.101

 

下面分步实现基于nginx的tomcat负载均衡和集群配置

 

一，tomcat集群

1，先下载msm及其依赖包

http://memcached-session-manager.googlecode.com/files/memcached-session-manager-1.3.0.jar

 

http://memcached-session-manager.googlecode.com/files/msm-javolution-serializer-jodatime-1.3.0.jar

 

http://memcached-session-manager.googlecode.com/files/msm-javolution-serializer-cglib-1.3.0.jar

 

http://spymemcached.googlecode.com/files/memcached-2.4.2.jar

http://memcached-session-manager.googlecode.com/files/javolution-5.4.3.1.jar

 

2，将这5个包放到$TOMCAT_HOME/lib目录下

3，修改$TOMCAT_HOME/conf/server.xml

 

Xml代码

1. <Context docBase=”E:/java_codes/TestSession/WebContent” path=”" reloadable=”true” >
2. <Manager className=”de.javakaffee.web.msm.MemcachedBackupSessionManager”
3.     memcachedNodes=”n1:localhost:11211″
4.     requestUriIgnorePattern=”.*\.(png|gif|jpg|css|js)$”
5.     sessionBackupAsync=”false”
6.     sessionBackupTimeout=”100″
7.     transcoderFactoryClass=”de.javakaffee.web.msm.serializer.javolution.JavolutionTranscoderFactory”
8.     copyCollectionsForSerialization=”false”
9.     />
10. </Context>

这里的memcachedNodes是填写memcached节点,多个节点时可以以空隔分开，如:

n1:localhost:11211 n2:localhost:11212

sessionBackupTimeout的单位为分钟

E:/java_codes/TestSession/WebContent 替换成你的WEB目录

 

修改后重启两个TOMCAT即可,这个时候已经解决SESSION的共享问题.

 

二，配置nginx实现负载均衡

以我的nginx.conf为例

Xml代码

1. #user  nobody;
2. worker_processes  1;
4. error_log  logs/error.log;
6. events {
7.     worker_connections  1024;
8. }
11. http {
12.     include       mime.types;
13.     default_type  application/octet-stream;
15.     sendfile        on;
16.     keepalive_timeout  65;
18.     #gzip  on;
19.     upstream  www.docyeah.com   {
20.               server   192.168.1.11:8080;
21.               server   192.168.1.101:8080;
22.     }
23.     server {
24.         listen       80;
25.         server_name  www.docyeah.com;
26.         charset utf-8;
27.         location / {
28.             root   html;
29.             index  index.html index.htm;
30.             proxy_pass        http://www.docyeah.com;
31.             proxy_set_header  X-Real-IP  $remote_addr;
32.             client_max_body_size  100m;
33.         }
36.         location ~ ^/(WEB-INF)/ {
37.         deny all;
38.         }
40.         error_page   500 502 503 504  /50x.html;
41.         location = /50x.html {
42.             root   html;
43.         }
45.     }
46. }

 

将www.docyeah.com替换成你的域名

192.168.1.11和192.168.1.101替换成你服务器的IP

OK，已经完成。启动nginx即可。