http--tomcat--memcached Configuration

Two Tomcat nodes: 172.16.100.7 (tomcatA.magedu.com), 172.16.100.8 (tomcatB.magedu.com)

Two x memcached nodes: 172.16.100.9, 172.16.100.10

One load Balancer node: 172.16.100.6

Clients-->172.16.100.6--> (Tomcata, TOMCATB)

Combined with Tomcat, the session exists in memcached

1 Installing memcached

Yum Install Memcached-y

Start the memcached service

2 Configuring Tomcat

1 Installing Tomcat and JDK

2 Copy the corresponding class file into the Tomcat class file

Download the following jar file to the Lib directory in the Tomcat installation directory of each tomcat node, where ${version} is replaced with the version number you need, tc${6,7,8} to be the same version number as the Tomcat version.

Memcached-session-manager-${version}.jar 2.1.1

Memcached-session-manager-tc${6,7,8}-${version}.jar tc7-2.1.1

Spymemcached-${version}.jar 2.1.1

Msm-javolution-serializer-${version}.jar 2.1.1

Javolution-${version}.jar

Put it in/usr/share/java/tomcat/.

Memcached-session-manager Project Address,

http://code.google.com/p/memcached-session-manager/,

Https://github.com/magro/memcached-session-manager

Define a context container for testing on a host on two Tomcat, and create a session manager in it, as follows:

<context path= "/test" docbase= "/usr/local/tomcat/webapps/test" reloadable= "true" >

<manager classname= "De.javakaffee.web.msm.MemcachedBackupSessionManager"

Memcachednodes= "n1:172.16.100.9:11211,n2:172.16.100.10:11211"

failovernodes= "N1"

Requesturiignorepattern= ". *\. (ICO|PNG|GIF|JPG|CSS|JS) $ "

Transcoderfactoryclass= "De.javakaffee.web.msm.serializer.javolution.JavolutionTranscoderFactory"

/>

</Context>

Provide test pages for two, respectively

Tomcata:

# Mkdir-pv/usr/local/tomcat/webapps/test/web-inf/{classes,lib}

# vim/usr/local/tomcat/webapps/test/index.jsp

<%@ page language= "java"%>

<body>

<table align= "centre" border= "1" >

<tr>

<td>session id</td>

<% Session.setattribute ("magedu.com", "magedu.com"); %>

<td><%= Session.getid ()%></td>

</tr>

<tr>

<td>created on</td>

<td><%= session.getcreationtime ()%></td>

</tr>

</table>

</body>

TOMCATB:

# Mkdir-pv/usr/local/tomcat/webapps/test/web-inf/{classes,lib}

# vim/usr/local/tomcat/webapps/test/index.jsp,

<%@ page language= "java"%>

<body>

<table align= "centre" border= "1" >

<tr>

<td>session id</td>

<% Session.setattribute ("magedu.com", "magedu.com"); %>

<td><%= Session.getid ()%></td>

</tr>

<tr>

<td>created on</td>

<td><%= session.getcreationtime ()%></td>

</tr>

</table>

</body>

Configure the reverse proxy load balancing content on 172.16.100.6, similar to the following: HTTP

Add vim to the configuration file./conf.d/ilinux.conf

<proxy balancer://tomcat>

Balancermember http://172.16.100.7:8080 loadfactor=1

Balancermember http://172.16.100.8:8080 loadfactor=1

Proxyset lbmethod=byrequests

</Proxy>

Proxyvia OFF

Proxyrequests OFF

proxypass/balancer://tomcat/

proxypassreverse/balancer://tomcat/

<proxy *>

Order Allow,deny

Allow from all

</Proxy>

<location/>

Order Allow,deny

Allow from all

</Location>

Start the HTTP service

Access: Test results, Access http://172.16.100.6/test in the browser, the result is as follows, and its session ID remains unchanged in the load balancing environment.

http--tomcat--memcached Configuration