linux安装nginx并配置tomcat负载均衡案例_虚拟机 linux nginx + tomcat 负载均衡-优快云博客

本文链接：https://blog.youkuaiyun.com/qq_15076569/article/details/91966211

1.本地在虚拟机中安装192.168.254.100以及192.168.254.110上安装两台tomcat8.5，修改两台tomcat的server.xml配置，添加使sessionid保持一致的配置如下：

<Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"
channelSendOptions="8">

<Manager className="org.apache.catalina.ha.session.DeltaManager"
       expireSessionsOnShutdown="false"
       notifyListenersOnReplication="true"/>

<Channel className="org.apache.catalina.tribes.group.GroupChannel">
   <Membership className="org.apache.catalina.tribes.membership.McastService"
               address="228.0.0.4"
               port="45564"
               frequency="500"
               dropTime="3000"/>
   <Receiver className="org.apache.catalina.tribes.transport.nio.NioReceiver"
           address="auto"
           port="4000"
           autoBind="100"
           selectorTimeout="5000"
           maxThreads="6"/>

   <Sender className="org.apache.catalina.tribes.transport.ReplicationTransmitter">
   <Transport className="org.apache.catalina.tribes.transport.nio.PooledParallelSender"/>
   </Sender>
   <Interceptor className="org.apache.catalina.tribes.group.interceptors.TcpFailureDetector"/>
   <Interceptor className="org.apache.catalina.tribes.group.interceptors.MessageDispatchInterceptor"/>
</Channel>

<Valve className="org.apache.catalina.ha.tcp.ReplicationValve"
       filter=""/>
<Valve className="org.apache.catalina.ha.session.JvmRouteBinderValve"/>

<Deployer className="org.apache.catalina.ha.deploy.FarmWarDeployer"
           tempDir="/tmp/war-temp/"
           deployDir="/tmp/war-deploy/"
           watchDir="/tmp/war-listen/"
           watchEnabled="false"/>

<ClusterListener className="org.apache.catalina.ha.session.ClusterSessionListener"/>
</Cluster>

1.1别忘了web.xml增加<distributable/>标签

2.安装nginx，参考文章https://www.cnblogs.com/xxoome/p/5866475.html

3.修改nginx的conf.xml,配置两台服务器的负载均衡

upstream tomcat-portal {
server 192.168.254.100:8080;
server 192.168.254.110:8080;
}
server {
listen 80;
server_name localhost;

#charset koi8-r;

#access_log logs/host.access.log main;

location / {
proxy_pass http://tomcat-portal;
index index.html index.htm index.jsp;
}

}

4.启动nginx、启动两台tomcat，在tomcat/webapps中增加查看session的jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
   String path = request.getContextPath();
   String basePath = request.getScheme() + "://"
           + request.getServerName() + ":" + request.getServerPort()
           + path + "/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>应用集群测试---session共享</title>
</head>
<body>
   <center>
       <b>服务器信息</b>
   </center>
   <hr />
   <%
       out.println("实际访问地址:" + request.getLocalAddr() + " : "
               + request.getLocalPort() + "<br>");
   %>
   <hr />
   <%
       out.println("<br> Session ID: " + session.getId() + "<br><hr/>");
       // 如果有新的 Session 属性设置
       String dataName = request.getParameter("dataName");
       if (dataName != null && dataName.length() > 0) {
           String dataValue = request.getParameter("dataValue");
           session.setAttribute(dataName, dataValue);
       }
       out.println("<b>Session 列表</b><br><hr/>");
       out.println("<table border=\"1\"><tr><td width=\"200\">属性名称</td><td width=\"300\">属性值</td></tr>");
       System.out.println("============================");
       Enumeration<String> e = session.getAttributeNames();
       while (e.hasMoreElements()) {
           String name = (String) e.nextElement();
           String value = session.getAttribute(name).toString();
           out.println("<tr><td>" + name + "</td><td>" + value
                   + "</td></tr>");
           System.out.println(name + " = " + value);
       }
       out.println("</table>");
   %>
   <hr />
   <div>
       <form action="test2.jsp" method="POST">
           <b>属性名称:</b><input type=text size=25 name="dataName">
              &nbsp <b>属性赋值:</b><input type=text size=25
               name="dataValue">        
           <input type=submit value="设置属性">
       </form>
   </div>
</body>
</html>