Using memcached for Tomcat cluster session sharing

Environment centos6.7, download and install the necessary software: Yum-y install Epel-release (TOMCAT7 on this source, TOMCAT7 is now the mainstream version)

Yum-y install tomcat direct download TOMCAT7, yum-y install Java-1.7.0-openjdk-devel (Tomcat needs to run on a Java virtual machine)

Vim/etc/tomcat/server.xml Modifying a configuration file

                  unpackwars= "true" autodeploy= "true" >      <context path= "" docbase= "/data/webapps" reloadable= "true" >        <manager classname= " De.javakaffee.web.msm.MemcachedBackupSessionManager "        memcachednodes=" n1:192.168.238.250:11211,n2 : 192.168.238.251:11211 "        failovernodes=" N2 "        requesturiignorepattern=". *\. ( ICO|PNG|GIF|JPG|CSS|JS) $ "        transcoderfactoryclass=" De.javakaffee.web.msm.serializer.javolution.JavolutionTranscoderFactory "/>      </Context>      </ Host>

The above words are not to be repaid, it is to put a map

Customized a virtual host:

Added Context:<context path= "" docbase= "/data/webapps" reloadable= "true" on this virtual host >

The key is the manager segment:

Take a globally unique name for the Manager: <manager classname= "De.javakaffee.web.msm.MemcachedBackupSessionManager"

What memcached server nodes are defined: memcachednodes= "n1:192.168.238.250:11211,n2:192.168.238.251:11211"

Define an alternate node: failovernodes= "N2"

For those request URL ignore: requesturiignorepattern= ". *\. (ICO|PNG|GIF|JPG|CSS|JS) $ "

Fixed format: transcoderfactoryclass= "De.javakaffee.web.msm.serializer.javolution.JavolutionTranscoderFactory"/>

　　

Define the default virtual host as Web.com:

Jvmroute= "Tomcata" is added jvmroute= "Tomcata" in the session ID of the request web.com, this experiment can not be added

Create a page resource: Mkdir-p/data/webapps/{web-inf,classes,lib} cd/data/webapps/vim index.jsp

JSP page resources are as follows

<%@ page language= "java"%>

Put a picture:

Download the following packages: javolution-5.5.1 memcached-session-manager-1.8.2 memcached-session-manager-tc7-1.8.2

msm-javolution-serializer-1.8.2 spymemcached-2.10.2 These package functions: Java through the memcached implementation session management

Above these several packages: Https://github.com/magro/memcached-session-manager/wiki/SetupAndConfiguration

Put the top several bags in the/usr/share/tomcat/lib/directory (note that the above bags are not wrong, this is a potential pit)

The versions of these packages must be right, I've been on this one-day pit, if your is tomcat8, corresponding to the memcached-session-manager-tc8-1.8.2

Two memcached are placed on both Tomcat and downloaded using yum-y install memcached.

Put the above steps on the Tomcata step, TOMCATB on the TOMCATB, the JSP page in the resource Tomcata changed to Tomcatb,red to Blue

Set up a nginx front end load balancer, start memcached, start Tomcat, start Nginx, go to browser verification

Validation succeeds, Session ID remains the same

Using memcached for Tomcat cluster session sharing