Memcached をセッションサーバーとして使用してセッションを維持する

rpm -ql tomcat-lib                  #   
/usr/share/java/tomcat/             # yum安装默认在此目录
/usr/local/tomcat/lib               # 在官网rpm安装的默认在此目录了

memcached-session-manager-1.8.3.jar
        http://repo1.maven.org/maven2/de/javakaffee/msm/memcached-session-manager/1.8.3/
memcached-session-manager-tc7-1.8.3.jar
        http://repo1.maven.org/maven2/de/javakaffee/msm/memcached-session-manager-tc7/1.8.3/
spymemcached-2.11.1.jar
        http://repo1.maven.org/maven2/net/spy/spymemcached/2.11.1/
javolution-5.4.3.1.jar      
        http://memcached-session-manager.googlecode.com/svn/maven/javolution/javolution/5.4.3.1/
msm-javolution-serializer-1.8.3.jar
        http://repo1.maven.org/maven2/de/javakaffee/msm/msm-javolution-serializer/1.8.3/

    yum install httpd

    shell > vim /etc/httpd/conf.d/ajp-tomcat.conf
    #
                                            # 定义主机组
        BalancerMember  ajp://172.18.68.21:8009 route=tomcatA
        BalancerMember  ajp://172.18.68.22:8009 route=tomcatB
        ProxySet lbmethod=byrequests
    
    #
                                                          # 创建虚拟主机
                ServerName www.baidu.com
                ProxyVia On
                ProxyRequests Off
                ProxyPreserveHost On
                proxyvia on
                
                        Require all granted
                
                ProxyPass / balancer://tomcatservers/                   # 设定所有调度至后端
                ProxyPassReverse / balancer://tomcatservers/            # 设定所有调度至后端
                                                            # centos7默认拒绝，所以要允许
                        Require all granted
                
                                            # apache的管理页面
                        SetHandler balancer-manager
                        ProxyPass !                                     # 匹配到apache的管理页面不代理
                        Require all granted                             # 设定允许
                
    
    #
    shell > systemctl start httpd

yum install tomcat tomcat-admin-webapps tomcat-webapps

vim /etc/tomcat/server.xml
在host标签内配置以下内容

  
                  # 黄色标记部分为流式化管理工具，如果使用其他流式化工具，更改这两个名即可

rpm -ql tomcat-lib # 通过此命令查看.jar文件存放的目录，就是类库文件的目录
/usr/share/java/tomcat/ # yum安装的tomcat类库路径
/usr/local/tomcat/lib # 在官网rpm安装的tomcat类库路径

shell > mkdir -pv /usr/local/tomcat/webapps/test/WEB-INF/{classes,lib}
shell > vim /usr/local/tomcat/webapps/test/index.jsp
添加如下内容：

systemctl start tomcat

yum install memcached
systemctl start memcached