[web architect] nginx1.2.6+ tomcat7+memcached1.2.6

最新推荐文章于 2021-12-14 16:25:29 发布

原创最新推荐文章于 2021-12-14 16:25:29 发布 · 120 阅读

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#nginx #tomcat #memcached #cluster

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本文介绍了一个使用Nginx作为负载均衡器，并结合Memcached进行会话管理的集群配置案例。详细展示了如何安装配置Memcached服务，以及如何在Tomcat服务器中设置会话共享，还提供了Nginx的配置示例。

Load Balancer (Nginx)

/ \

Cluster1 Cluster2

/ \ / \

Tomcat1 Tomcat2 Tomcat3 Tomcat4

memcached

下载：

Ubuntu:

sudo apt-get install memcached

Windows:

http://www.kuaipan.cn/file/id_18237169873244609.htm

启动服务器：

memcached -p 11211 -u memcached -m 64 -M -vv

客户端访问：

telnet localhost 11211

Command	Description	Example
get	Reads a value	get mykey
set	Set a key unconditionally	set mykey 0 60 5
add	Add a new key	add newkey 0 60 5
replace	Overwrite existing key	replace key 0 60 5
append	Append data to existing key	append key 0 60 15
prepend	Prepend data to existing key	prepend key 0 60 15
incr	Increments numerical key value by given number	incr mykey 2
decr	Decrements numerical key value by given number	decr mykey 5
delete	Deletes an existing key	delete mykey
flush_all	Invalidate specific items immediately	flush_all
flush_all	Invalidate all items in n seconds	flush_all 900
stats	Prints general statistics	stats
	Prints memory statistics	stats slabs
	Prints memory statistics	stats malloc
	Print higher level allocation statistics	stats items
		stats detail
		stats sizes
	Resets statistics	stats reset
version	Prints server version.	version
verbosity	Increases log level	verbosity
quit	Terminate telnet session	quit

http://code.google.com/p/memcached-session-manager/

https://github.com/magro/msm-sample-webapp

Nginx

http {
    server {
        location / {
            root   html;
            index  index.html index.htm;
	    proxy_pass  http://127.0.0.1;
        } 
	upstream 127.0.0.1 {
		server 127.0.0.1:8080 weight=1; 
		server 127.0.0.1:8081 weight=2; 
	} 
}

tomcat

server.xml

D:\tomcat-7.0.34_1

port:8005

D:\tomcat-7.0.34_2

port:8006

<Server port="8005" shutdown="SHUTDOWN">

D:\tomcat-7.0.34_1

port:8080

D:\tomcat-7.0.34_2

port:8081

 <Connector port="8080" protocol="HTTP/1.1" connectionTimeout="20000" redirectPort="8443" />

D:\tomcat-7.0.34_1

port:8009

D:\tomcat-7.0.34_2

port:9009

<Connector port="8009" protocol="AJP/1.3" redirectPort="8443" />

D:\tomcat-7.0.34_1

jvmRoute:tomcat7-1

D:\tomcat-7.0.34_2

jvmRoute:tomcat7-2

<Engine name="Catalina" defaultHost="localhost" jvmRoute="tomcat7-1">

D:\tomcat-7.0.34_1

port:4000

D:\tomcat-7.0.34_2

port:4001

 <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.MessageDispatch15Interceptor" />
	</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.JvmRouteSessionIDBinderListener" />
	<ClusterListener className="org.apache.catalina.ha.session.ClusterSessionListener" />
 </Cluster>

D:\tomcat-7.0.34_1

docBase:D:/tomcat-7.0.34_1/webapps/test

D:\tomcat-7.0.34_2

docBase:D:/tomcat-7.0.34_2/webapps/test

<Host name="localhost" appBase="webapps" unpackWARs="true" autoDeploy="true">
<Context docBase="D:/tomcat-7.0.34_1/webapps/test" path="" reloadable="true">
	<Manager className="de.javakaffee.web.msm.MemcachedBackupSessionManager" memcachedNodes="n1:localhost:11211" requestUriIgnorePattern=".*/.(png|gif|jpg|css|js)$" sessionBackupAsync="false" sessionBackupTimeout="100" transcoderFactoryClass="de.javakaffee.web.msm.serializer.javolution.JavolutionTranscoderFactory" copyCollectionsForSerialization="false"/>
</Context>
</Host>

D:\tomcat-7.0.34_1\webapps\test\index.jsp

<%@ page contentType="text/html; charset=GBK" %> 
<%@ page import="java.util.*" %> 
<html>
   <head>
      <title>Cluster Test</title>
   </head>
   <body> 
    <% 
    System.out.println(session.getId()); 
    out.println("<br> SESSION ID:" + session.getId()+"<br>");   
    %> 
   </body>
</html>

D:\tomcat-7.0.34_1\webapps\test\WEB-INF\web.xml

<?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" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" 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>test</display-name>
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
  <distributable/>
</web-app>