Tomcat会话保持之session server

author：JevonWei
版权声明：原创作品

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Tomcat会话保持之session server

拓扑图

环境

tomcatA    172.16.253.108
tomcatB    172.16.253.105
memcachedA 172.16.253.108
memcachedB 172.16.253.105
代理服务器 172.16.253.191

• 程序下载
  https://github.com/magro/memcached-session-manager/wiki/SetupAndConfiguration

下载相关程序到Tomcat主机的//usr/share/java/tomcat目录下

javolution-5.4.3.1.jar
memcached-session-manager-1.8.3.jar
memcached-session-manager-tc7-1.8.3.jar
msm-javolution-serializer-1.8.3.jar 
spymemcached-2.11.1.jar /usr/share/java/tomcat

memcachedA

[root@TomcatA ~]# yum -y install memcached
[root@TomcatA ~]# systemctl start memcached.service 
[root@TomcatA ~]# ss -ntl

memcachedB

[root@TomcatB ~]# yum -y install memcached
[root@TomcatB ~]# systemctl start memcached.service 
[root@TomcatB ~]# ss -ntl

Tomcat A

在Tomcat安装完成的基础上    
将程序包下载到 /usr/share/java/tomcat

[root@TomcatA ~]# vim /etc/tomcat/server.xml
    <Engine name="Catalina" defaultHost="localhost">
    </Host>
        <Host name="localhost"  appBase="webapps"
        unpackWARs="true" autoDeploy="true">
        <Context path="/test" docBase="test" reloadable="true">
          <Manager className="de.javakaffee.web.msm.MemcachedBackupSessionManager"
            memcachedNodes="n1:172.16.253.108:11211,n2:172.16.253.105:11211" \指定memcached的服务器，并使用n1，n2区别节点 
            failoverNodes="n1"
            requestUriIgnorePattern=".*.(ico|png|gif|jpg|css|js)$"
            transcoderFactoryClass="de.javakaffee.web.msm.serializer.javolution.JavolutionTranscoderFactory"
        />
        </Context>
    </Host>
[root@TomcatA ~]# systemctl start tomcat                       
[root@TomcatA ~]# ss -ntl

Tomcat B

在Tomcat安装完成的基础上    
将程序包下载到 /usr/share/java/tomcat

[root@TomcatB ~]# vim /etc/tomcat/server.xml
    <Engine name="Catalina" defaultHost="localhost" jvmRoute="tcB">
     <Host name="localhost"  appBase="webapps"
        unpackWARs="true" autoDeploy="true">
        <Context path="/test" docBase="test" reloadable="true">
          <Manager className="de.javakaffee.web.msm.MemcachedBackupSessionManager"
            memcachedNodes="n1:172.16.253.108:11211,n2:172.16.253.105:11211"
            failoverNodes="n1"
            requestUriIgnorePattern=".*.(ico|png|gif|jpg|css|js)$"
            transcoderFactoryClass="de.javakaffee.web.msm.serializer.javolution.JavolutionTranscoderFactory"
          />
         </Context>
    </Host>
[root@TomcatB ~]# systemctl start tomcat                       
[root@TomcatB ~]# ss -ntl

代理服务器

[root@danran conf.d]# vim tomcat-http.conf                  
    <proxy balancer://appsrvs>
        BalancerMember http://172.16.253.108:8080
        BalancerMember http://172.16.253.105:8080
        ProxySet lbmethod=byrequests
    </Proxy>
    <VirtualHost *:80>
        ServerName www.danran.com
        ProxyVia On
        ProxyRequests Off
        ProxyPreserveHost On
        <Proxy *>
            Require all granted
        </Proxy>
        ProxyPass / balancer://appsrvs/
        ProxyPassReverse / balancer://appsrvs/
        <Location />
            Require all granted
        </Location>
    </VirtualHost>

client

TomcatA.magedu.com

Session ID	Session ID 	D63DF5FE54F9D8EADB833AEE0E7DD00B-n2.tcA \n2为创建会话时的Tomcat主机，tcA为当前Tomcat

Created on 	1504354197906


TomcatB.magedu.com

Session ID 	D63DF5FE54F9D8EADB833AEE0E7DD00B-n2.tcB
Created on 	1504354197906