tomcat session会话保持实验-之Nginx+tomcat+memcached

2017-02-15 05:53

tomcat session会话保持实验-之Nginx+tomcat+memcached


 

实验要求

1、nginx+tomcat 负载均衡

2、memcached 会话保持

 

实验拓扑

         ip网络规划

         Nginxnode2:172.16.76.20

         tomcatAnode3:172.16.76.30  memcached

         tomcatBnode4:172.16.76.40  memcached

 

基础配置

    node2

                   [root@node2~]# yum install nginx �y

   node3                 

[root@node3~]# yum install tomcat �y
[root@node3~]# cd /var/lib/tomcat/webapps/
[root@node3 webapps]# mkdir -pv test/{claess,lib,WEB-INF
[root@node3 webapps]#vim test/index.jsp
<%@ page language="java" %>
      <html>
       <head><title>TomcatA</title></head>
    <body>
    <h1><fontcolor="red">TomcatA.linuxinfo.top</font></h1>
     <tablealign="centre" border="1">
       <tr>
     <td>SessionID</td>
    <%session.setAttribute("linuxinfo.top","linuxinfo.top");%>
       <td><%=session.getId() %></td>
        </tr>
         <tr>
       <td>Createdon</td>
       <td><%=session.getCreationTime() %></td>
         </tr>
         </table>
       </body>
    </html>
[root@node3 ~]# systemctl restart tomcat

 


 node4     

[root@node4~]# yum install tomcat �y
[root@node4~]# cd /var/lib/tomcat/webapps/
[root@node4 webapps]# mkdir -pv test/{claess,lib,WEB-INF
[root@node4 webapps]#vim test/index.jsp
<%@ page language="java" %>
   <html>
     <head><title>TomcatB</title></head>
      <body>
    <h1><font color="blue">TomcatA.linuxinfo.top</font></h1>
      <tablealign="centre" border="1">
     <tr>
      <td>SessionID</td>
    <%session.setAttribute("linuxinfo.top","linuxinfo.top");%>
        <td><%=session.getId() %></td>
       </tr>
      <tr>
       <td>Createdon</td>
         <td><%=session.getCreationTime() %></td>
        </tr>
       </table>
     </body>
    </html>
[root@node4 ~]# systemctl restart tomcat

                   

        

 

Nginx配置

   root@node2~]# cat /etc/nginx/nginx.conf

user nginx;
worker_processes auto;
error_log /var/log/nginx/error.log;
pid /run/nginx.pid;
 
include /usr/share/nginx/modules/*.conf;
events {
    worker_connections 1024;
}
http {
    log_format main '$remote_addr - $remote_user [$time_local] "$request" '
                     '$status$body_bytes_sent "$http_referer" '
                    '"$http_user_agent" "$http_x_forwarded_for"';
    upstream tomcatser {   #服务器组配置负载均衡
              server172.16.76.30:8080;
              server172.16.76.40:8080;
     #       ip_hash
}
    access_log  /var/log/nginx/access.log  main;
 
    sendfile            on;
    tcp_nopush          on;
    tcp_nodelay         on;
    keepalive_timeout   65;
    types_hash_max_size 2048;
 
    include             /etc/nginx/mime.types;
    default_type        application/octet-stream;
 
  
    include/etc/nginx/conf.d/*.conf;
    server {
        listen       80default_server;
        listen       [::]:80 default_server;
        server_name  _;
        root         /usr/share/nginx/html;
        # Load configurationfiles for the default server block.
        include/etc/nginx/default.d/*.conf;
 
              #location 代理至后端服务器组;负载均衡
      location / {
                       proxy_pass http://tomcatser;
     location ~* (\.jsp|do)${   
              proxy_passhttp://tomcatser;
    }
        }
             error_page 404 /404.html;
            location =/40x.html {
        }
        error_page 500 502 503504 /50x.html;
            location =/50x.html {
        }
}
[root@node2 ~]# systemctlrestart nginx


  memcached

        下载如下jar文件至各tomcat节点的tomcat安装目录下的lib目录中,其中的${version}要换成你所需要的版本号,tc${6,7,8}要换成与tomcat版本相同的版本号。

                 memcached-session-manager-${version}.jar

                 memcached-session-manager-tc${6,7,8}-${version}.jar

    spymemcached-${version}.jar

    msm-javolution-serializer-${version}.jar

     javolution-${version}.jar

        本实验所用jar包已上传(仅供实验版本),各位可以去下面链接下载:

        http://down.51cto.com/3363989

         或者到官方下载(这个应该被。。。)

    memcached-session-manager项目地址,https://code.google.com/archive/p/memcached-session-manager/downloads


本实验环境版本如下:

         [root@node3~]# tomcat  version

    Server version: Apache Tomcat/7.0.69

    Server built:   Nov 6 201601:55:51 UTC

    Server number:  7.0.69.0

    OS Name:        Linux

    OS Version:    3.10.0-327.el7.x86_64

    Architecture:   amd64

    JVM Version:    1.8.0_121-b13

    JVM Vendor:     OracleCorporation

安装memcached

         [root@node3~]# yum install memcached �y

         [root@node4~]# yum install memcached -y

 

tomcat

ndoe3

         1、[root@node3 ~]# vim /etc/tomcat/server.xml

         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:

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

              <ManagerclassName="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>                      

 

2、 在<Engine name="Catalina"defaultHost="localhost"> 中添加jvmRoute="TomcatA"即

         <Enginename="Catalina" defaultHost="localhost"jvmRoute="TomcatA"> 

         #tomcatB主机 则将此修改为tomcatB

 

node4:

1、  将node3 tomcat配置文件server.xml拷贝一份至本机;

         [root@node4~]# cd /etc/tomcat/

[root@node4 tomcat]# scp172.16.76.30:/etc/tomcat/server.xml .

2、注:修改 <Engine> 中jvmRoute=TomcatB;

        

 

重启所有服务

         [root@node2~]# systemctl restart nginx

         [root@node3~]# systemctl restart tomcat

         [root@node3~]# systemctl restart memcached

         [root@node4~]# systemctl restart tomcat

         [root@node4~]# systemctl restart memcached

 

 测试     

    

至此实验完成;访问172.16.76.20/test/实现nginx负载均衡同时利用memcached实现保持会话;