tomcat集群与Nginx 反向代理负载均衡 session-CFANZ编程社区

1、新建3个相同的web项目，只有index中有点区别，这也是为了方便观察

1、项目如下

tomcat集群与Nginx 反向代理负载均衡 session_apache

2、编辑index.jsp,只有后面的tomcat3 是不一样的，分别为tomcat1、tomcat2、tomcat3

<body> <h1><font color="red">Session serviced by tomcat</font></h1> <table aligh="center" border="1"> <tr> <td>Session ID</td> <td><%=session.getId() %>-----tomcat3</td> <%"abc","abc");%> </tr> <tr> <td>Created on</td> <td><%=%></td> </tr> </table> </body>

<body>
<h1><font color="red">Session serviced by tomcat</font></h1> 
<table aligh="center" border="1"> 
<tr> 
<td>Session ID</td> 
<td><%=session.getId() %>-----tomcat3</td> 
<%"abc","abc");%> 
</tr> 
<tr> 
<td>Created on</td> 
<td><%=%></td> 
</tr> 
</table> 
</body>

3、web.xml实现session复制，添加标签

<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0"> <display-name>NginxTomcatSession</display-name> <distributable/> <!-- 前加<distributable /> 标签 (这个是tomcat进行session复制所必须的,否则session不能进行复制!) --> <welcome-file-list> <welcome-file>index.html</welcome-file> <welcome-file>index.htm</welcome-file> <welcome-file>index.jsp</welcome-file> <welcome-file>default.html</welcome-file> <welcome-file>default.htm</welcome-file> <welcome-file>default.jsp</welcome-file> </welcome-file-list> </web-app>

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
<display-name>NginxTomcatSession</display-name>
  <distributable/>  
<!-- 前加<distributable /> 标签 
     (这个是tomcat进行session复制所必须的,否则session不能进行复制!) 
 -->
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
<welcome-file>default.html</welcome-file>
<welcome-file>default.htm</welcome-file>
<welcome-file>default.jsp</welcome-file>
</welcome-file-list>
</web-app>

3、建立3个tomcat服务器

1、tomcat服务器位置

tomcat集群与Nginx 反向代理负载均衡 session_apache_02

2、修改各自服务器的端口

1、更改server和Connector端口.

1、tomcat1 中server的端口为18005,Connector端口为18080,；

2、tomcat2的分别是28005,28080

3、tomcat3分别是38085 ,38080

2、修改server.xml中为了实现session复制功能

1、取消Cluster节点的注释. （也就是添加集群）

2、保持每个Engine 节点jvmRoute的值是相同的. （sessionid的后缀）

3、tomcat1 中的的sever.xml

<?xml version='1.0' encoding='utf-8'?> <Server port="18005" shutdown="SHUTDOWN"> <Listener className="org.apache.catalina.core.AprLifecycleListener" SSLEngine="on" /> <Listener className="org.apache.catalina.core.JasperListener" /> <Listener className="org.apache.catalina.core.JreMemoryLeakPreventionListener" /> <Listener className="org.apache.catalina.mbeans.ServerLifecycleListener" /> <Listener className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener" /> <GlobalNamingResources> <Resource name="UserDatabase" auth="Container" type="org.apache.catalina.UserDatabase" description="User database that can be updated and saved" factory="org.apache.catalina.users.MemoryUserDatabaseFactory" pathname="conf/tomcat-users.xml" /> </GlobalNamingResources> <Service name="Catalina"> <Connector port="18080" protocol="HTTP/1.1" connectionTimeout="20000" redirectPort="8443" /> <Connector port="18009" protocol="AJP/1.3" redirectPort="8443" /> jvmRoute="jvm1"> <Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"/> <Realm className="org.apache.catalina.realm.LockOutRealm"> <Realm className="org.apache.catalina.realm.UserDatabaseRealm" resourceName="UserDatabase"/> </Realm> <Host name="localhost" appBase="webapps" unpackWARs="true" autoDeploy="true" xmlValidation="false" xmlNamespaceAware="false"> </Host> </Engine> </Service> </Server>

<?xml version='1.0' encoding='utf-8'?> 
<Server port="18005" shutdown="SHUTDOWN"> 
 <Listener className="org.apache.catalina.core.AprLifecycleListener" SSLEngine="on" /> 
 <Listener className="org.apache.catalina.core.JasperListener" /> 
 <Listener className="org.apache.catalina.core.JreMemoryLeakPreventionListener" /> 
 <Listener className="org.apache.catalina.mbeans.ServerLifecycleListener" /> 
 <Listener className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener" /> 
  
 <GlobalNamingResources> 
 <Resource name="UserDatabase" auth="Container" 
 type="org.apache.catalina.UserDatabase" 
 description="User database that can be updated and saved" 
 factory="org.apache.catalina.users.MemoryUserDatabaseFactory" 
 pathname="conf/tomcat-users.xml" /> 
 </GlobalNamingResources> 
  
 <Service name="Catalina"> 
 <Connector port="18080" protocol="HTTP/1.1" 
 connectionTimeout="20000" 
 redirectPort="8443" /> 
 <Connector port="18009" protocol="AJP/1.3" redirectPort="8443" /> 
jvmRoute="jvm1">
<Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"/>
 <Realm className="org.apache.catalina.realm.LockOutRealm"> 
 <Realm className="org.apache.catalina.realm.UserDatabaseRealm" resourceName="UserDatabase"/> 
 </Realm> 
 <Host name="localhost" appBase="webapps" unpackWARs="true" autoDeploy="true" 
 xmlValidation="false" xmlNamespaceAware="false"> 
 </Host> 
 </Engine> 
 </Service> 
</Server>

3、布置这3个项目分部到这3个服务器上去

1、项目位置

tomcat集群与Nginx 反向代理负载均衡 session_xml_03

tomcat集群与Nginx 反向代理负载均衡 session_xml_04

tomcat集群与Nginx 反向代理负载均衡 session_xml_05

2、xml方式启动，这里不讲解

4、nginx配置

1、负载均衡

upstream mysite { server localhost:18080weight=5; server localhost:28080 weight=5; server localhost:38080 weight=5; }

2、反向代理，一定要记得添加下面的timeout ，否则浏览器会太慢

server { listen 80; server_name localhost; #监听tomcat8080 root E:/workspace/NginxTest/NginxRoot; index index.html index.htm; location / { #添加如下3个配置后,浏览器访问的时候切换速度会很快，此时配置是1秒 proxy_connect_timeout 1; proxy_send_timeout 1; proxy_read_timeout 1; proxy_pass http://mysite; }

server { 
 listen 80; 
 server_name localhost; #监听tomcat8080 
 root E:/workspace/NginxTest/NginxRoot; 
 index index.html index.htm; 
  
 location / { 
 #添加如下3个配置后,浏览器访问的时候切换速度会很快，此时配置是1秒 
 proxy_connect_timeout 1; 
 proxy_send_timeout 1; 
 proxy_read_timeout 1; 
proxy_pass http://mysite;
 }