tomcat8+memcached session共享

一、环境准备

tomcat8+memcached session共享-LMLPHP

时间同步(同步后确认各服务器时间是否一致，不一致需要修改一下时区)

关闭防火墙

软件包和jar包链接：https://pan.baidu.com/s/1sl9Nob7

二、安装配置nginx和memcached

Nginx和memcached使用yum安装即可，下面是nginx配置文件内容

user  nginx;

worker_processes  ;

events {

    worker_connections  ;

}

http {

    include       mime.types;

    default_type  application/octet-stream;

    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '

                      '$status $body_bytes_sent "$http_referer" '

                      '"$http_user_agent" "$http_x_forwarded_for"';

    sendfile        on;

    tcp_nopush     on;

    keepalive_timeout  ;

    gzip  on;

    upstream tomcat-web {

      server 192.168.0.14:;

      server 192.168.0.15:;

       }

    server {

        listen       ;

        server_name  www.tomcat.com;

        location / {

            root   html;

            index  index.html index.htm index.jsp;

        }

        location ~* \.(jsp|do)$ {

                proxy_pass http://tomcat-web;

                proxy_redirect off;

                proxy_set_header Host $host;

                proxy_set_header X-Real-IP $remote_addr;

                proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

                proxy_next_upstream error timeout invalid_header http_500 http_502 http_503 http_504;

                   }

       location /nginx_status {

                stub_status on;

                access_log off;

                allow 192.168.0.0/;

                deny all;

                }

        error_page        /50x.html;

        location = /50x.html {

            root   html;

        }

    }

}

nginx.conf

分别启动nginx和memcached

三、安装配置tomcat

安装步骤忽略

下载jar包至各tomcat节点的tomcat安装目录下的lib目录中

tomcat8+memcached session共享-LMLPHP

分别在两个tomcat上的某host上定义一个用于测试的context容器，并在其中创建一个会话管理器，如下所示：

[root@tomcat-server- ~]# vim /usr/local/tomcat/conf/server.xml

      <Host name="localhost"  appBase="webapps"

            unpackWARs="true" autoDeploy="true">

        <Context path="/test" docBase="/usr/local/tomcat/webapps/test" reloadable="true">

            <Manager className="de.javakaffee.web.msm.MemcachedBackupSessionManager"

                     memcachedNodes="n1:192.168.0.12:11211,n2:192.168.0.13:11211" #n1代表memcached的名称，后面为具体的ip地址

                     failoverNodes="n1"

                     requestUriIgnorePattern=".*\.(ico|png|gif|jpg|css|js)$"

                     transcoderFactoryClass="de.javakaffee.web.msm.serializer.javolution.JavolutionTranscoderFactory"

                        />

             </Context>

        <Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"

               prefix="localhost_access_log" suffix=".txt"

               pattern="%h %l %u %t &quot;%r&quot; %s %b" />

      </Host>

提供测试页面

tomcat-server-1

[root@tomcat-server- lib]# mkdir -pv /usr/local/tomcat/webapps/test/WEB-INF/{classes,lib}

[root@tomcat-server- lib]# vim /usr/local/tomcat/webapps/test/index.jsp

<%@ page language="java" %>

<html>

  <head><title>TomcatA</title></head>

  <body>

    <h1><font color="red">TomcatA</font></h1>

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

      <tr>

        <td>Session ID</td>

    <% session.setAttribute("tomcat","tomcat"); %>

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

      </tr>

      <tr>

        <td>Created on</td>

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

     </tr>

    </table>

  </body>

</html>

tomcat-server-2

[root@tomcat-server- lib]# mkdir -pv /usr/local/tomcat/webapps/test/WEB-INF/{classes,lib}

[root@tomcat-server- lib]#  vim /usr/local/tomcat/webapps/test/index.jsp

<%@ page language="java" %>

<html>

  <head><title>TomcatB</title></head>

  <body>

    <h1><font color="blue">TomcatB</font></h1>

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

      <tr>

        <td>Session ID</td>

    <% session.setAttribute("tomcat","tomcat"); %>

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

      </tr>

      <tr>

        <td>Created on</td>

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

     </tr>

    </table>

  </body>

</html>

重启两台tomcat，并用浏览器进行访问

tomcat8+memcached session共享-LMLPHP

测试结果，在浏览器中访问http://www.tomcat.com/test/index.jsp，结果如上所示，其session ID在负载均衡环境中保持不变。