Nginx+tomcat session cluster会话保持实验

Posted 2020-08-31

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nginx+tomcat session cluster会话保持实验

实验要求：

1、nginx+tomcat 负载均衡

2、会话保持

实验拓扑

ip网络规划

Nginxnode2:172.16.76.20

tomcatAnode3:172.16.76.30

tomcatBnode4:172.16.76.40

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><font color="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

node2

[[email protected]~]# vim /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
              server 172.16.76.30:8080;
              server 172.16.76.40:8080;
     #       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       80 default_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] ~]# systemctl restart nginx

tomcat配置

tomcatA:

1、配置tomcat session cluster

[[email protected] ~]# vim /etc/tomcat/server.xml
配置启用集群，将下列配置放置于<engine>或<host>中；
         <Enginename="Catalina" defaultHost="localhost"jvmRoute="TomcatA">
<Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"
        channelSendOptions="8">
 <ManagerclassName="org.apache.catalina.ha.session.DeltaManager"
          expireSessionsOnShutdown="false"
          notifyListenersOnReplication="true"/>
 <ChannelclassName="org.apache.catalina.tribes.group.GroupChannel">
   <MembershipclassName="org.apache.catalina.tribes.membership.McastService"
                address="228.0.76.4"#组播地址；可自行定义
                port="45564"
                frequency="500"
               dropTime="3000"/>
   <ReceiverclassName="org.apache.catalina.tribes.transport.nio.NioReceiver"
              address="172.16.76.30"  #服务器ip地址；可仅修改此一处
              port="4000"
              autoBind="100"
              selectorTimeout="5000"
              maxThreads="6"/>
 
<SenderclassName="org.apache.catalina.tribes.transport.ReplicationTransmitter">
 <TransportclassName="org.apache.catalina.tribes.transport.nio.PooledParallelSender"/>
 </Sender>
    <Interceptor className="org.apache.catalina.tribes.group.interceptors.TcpFailureDetector"/>
    <InterceptorclassName="org.apache.catalina.tribes.group.interceptors.MessageDispatch15Interceptor"/>
 </Channel>
 <ValveclassName="org.apache.catalina.ha.tcp.ReplicationValve"
        filter=""/>
 <Valve className="org.apache.catalina.ha.session.JvmRouteBinderValve"/>
 <DeployerclassName="org.apache.catalina.ha.deploy.FarmWarDeployer"
           tempDir="/tmp/war-temp/"
           deployDir="/tmp/war-deploy/"
           watchDir="/tmp/war-listen/"
           watchEnabled="false"/>
 <ClusterListenerclassName="org.apache.catalina.ha.session.JvmRouteSessionIDBinderListener"/>
 <ClusterListenerclassName="org.apache.catalina.ha.session.ClusterSessionListener"/>
</Cluster>

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

3、编辑WEB-INF/web.xml，添加<distributable/>元素

[[email protected]~]# cd /var/lib/tomcat/webapps/test/WEB-INF/

[[email protected] WEB-INF]# ls

web.xml

[[email protected] WEB-INF]# cp /etc/tomcat/web.xml .

[[email protected] WEB-INF]# vim web.xml