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

Posted 2020-08-31

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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

[[email protected]~]# yum install nginx –y

node3

[[email protected]~]# yum install tomcat –y
[[email protected]~]# cd /var/lib/tomcat/webapps/
[[email protected] webapps]# mkdir -pv test/{claess,lib,WEB-INF
[[email protected] 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>
[[email protected] ~]# systemctl restart tomcat

node4

[[email protected]~]# yum install tomcat –y
[[email protected]~]# cd /var/lib/tomcat/webapps/
[[email protected] webapps]# mkdir -pv test/{claess,lib,WEB-INF
[[email protected] 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>
[[email protected] ~]# systemctl restart tomcat

Nginx配置

[email protected]~]# 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 {
        }
}
[[email protected] ~]# 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：

[[email protected]~]# 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

[[email protected]~]# yum install memcached –y

[[email protected]~]# yum install memcached -y

tomcat

ndoe3

1、[[email protected] ~]# 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：

<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；

[[email protected]~]# cd /etc/tomcat/

[[email protected] tomcat]# scp172.16.76.30:/etc/tomcat/server.xml .

2、注：修改 <Engine> 中jvmRoute=TomcatB；

重启所有服务

[[email protected]~]# systemctl restart nginx

[[email protected]~]# systemctl restart tomcat