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tomcat负载均衡:实战中整理出tomcat集群和负载均衡

来源: 发布时间:星期五, 2008年12月19日浏览:52次评论:0

()环境介绍说明 (1)服务器有4台

台安装apache

3台安装tomcat

(2)apache2.0.55、tomcat5.5.15、jk2.0.4、jdk1.5.6或jdk1.4.2

(3)ip配置

台安装apache

ip为192.168.0.88

3台安装tomcat

服务器ip分别为192.168.0.1/2/4

( 2)安装过程

(1)在 3台要安装tomcat

服务器上先安装jdk

(2)配置jdk

安装路径

在环境变量path中加入jdk

bin路径

新建环境变量JAVA_HOME指向jdk

安装路径

(3)在 3台要安装tomcat

服务器上分别安装tomcat

调试 3个tomcat到能够正常启动

(4)tomcat

默认WEB服务端口是8080

默认

模式是单独服务

我

3个tomcat

WEB服务端口修改为7080/8888/9999

v修改位置为tomcat

安装目录下

conf/server.xml

修改前

配置为

<Connector port="8080" maxHttpHeaderSize="8192"
maxThreads="150" minSpareThreads="25" maxSpareThreads="75"
enableLookups="false" redirectPort="8443" acceptCount="100"
connectionTimeout="20000" disableUploadTimeout="true" />

修改后

配置为

<Connector port="7080" maxHttpHeaderSize="8192"
maxThreads="150" minSpareThreads="25" maxSpareThreads="75"
enableLookups="false" redirectPort="8443" acceptCount="100"
connectionTimeout="20000" disableUploadTimeout="true" />

依次修改每个tomcat

监听端口(7080/8888/9999)

(5)分别测试每个tomcat

启动是否正常

http://192.168.0.1:7080
http://192.168.0.2:8888
http://192.168.0.4:9999

( 3)负载均衡配置过程 (1)在那台要安装apache

服务器上安装apache2.0.55

我

安装路径为默认C:\Program Files\Apache Group\Apache2

(2)安装后测试能否正常启动

调试到能够正常启动http://192.168.0.88

(3)下载jk2.0.4后解压缩文件

(4)将解压缩后

目录中

modules目录中

mod_jk2.so文件复制到apache

安装目录下

modules目录中

我

为C:\Program Files\Apache Group\Apache2\modules

(5)修改apache

安装目录中

conf目录

配置文件httpd.conf

在文件中加LoadModule模块配置信息

最后加上

句LoadModule jk2_module modules/mod_jk2.so

(6)分别修改 3个tomcat

配置文件conf/server.xml

修改内容如下修改前

<!-- An Engine represents the entry po

(within Catalina) that processes
every request. The Engine implementation for Tomcat stand alone
analyzes the HTTP headers

d with the request, and passes them
on to the appropriate Host (virtual host). -->

<!-- You should

jvmRoute to support load-balancing via AJP ie :
<Engine name="Standalone" defaultHost="localhost" jvmRoute="jvm1">
-->


<Engine name="Catalina" defaultHost="localhost">

修改后

<!-- An Engine represents the entry po

(within Catalina) that processes
every request. The Engine implementation for Tomcat stand alone
analyzes the HTTP headers

d with the request, and passes them
on to the appropriate Host (virtual host). -->

<!-- You should

jvmRoute to support load-balancing via AJP ie :-->
<Engine name="Standalone" defaultHost="localhost" jvmRoute="tomcat1">



将其中

jvmRoute="jvm1"分别修改为jvmRoute="tomcat1"和jvmRoute="tomcat2"和jvmRoute="tomcat3"

(7)然后重启 3个tomcat

调试能够正常启动

(8)在apache

安装目录中

conf目录下创建文件workers2.propertie

写入文件内容如下

# fine the communication channel
[channel.

:192.168.0.1:8009]
info=Ajp13 forwarding over

配置第

个服务器tomcatId=tomcat1 #要和tomcat

配置文件server.xml中

jvmRoute="tomcat1"名称

致debug=0 lb_factor=1 #负载平衡因子

数字越大请求被分配

几率越高

# Define the communication channel
[channel.

:192.168.0.2:8009]
info=Ajp13 forwarding over

tomcatId=tomcat2
debug=0
lb_factor=1

# Define the communication channel
[channel.

:192.168.0.4:8009]
info=Ajp13 forwarding over

tomcatId=tomcat3
debug=0
lb_factor=1

[status:]
info=Status worker, displays runtime information.

[uri:/jkstatus.jsp]
info=Display status information and checks the config file for changes.
group=status:

[uri:/*]
info=Map the whole webapp
debug=0

(9)在 3个tomcat

安装目录中

webapps建立相同

应用

我和应用目录名为TomcatDemo

在 3个应用目录中建立相同 WEB-INF目录和页面index.jsp

index.jsp

页面内容如下

<%@ page contentType="text/html; char

=GBK" %>
<%@ page import="java.util.*" %>
<html><head><title>Cluster App Test</title></head>
<body>
Server Info:
<%
out.pr

ln(request.getLocalAddr

+ " : " + request.getLocalPort

+"<br>");%>
<%
out.pr

ln("<br> ID " + session.getId

+"<br>");

// 如果有新

Session 属性设置
String dataName = request.getParameter("dataName");

(dataName != null && dataName.length

> 0) {
String dataValue = request.getParameter("dataValue");
session.

Attribute(dataName, dataValue);
}

out.pr

("<b>Session 列表</b>");

Enumeration e = session.getAttributeNames

;
while (e.hasMoreElements

) {
String name = (String)e.nextElement

;
String value = session.getAttribute(name).toString

;
out.pr

ln( name + " = " + value+"<br>");

.out.pr

ln( name + " = " + value);
}
%>
<form action="index.jsp" method="POST">
名称:<input type=text size=20 name="dataName">
<br>
值:<input type=text size=20 name="dataValue">
<br>
<input type=submit>
</form>
</body>
</html>

(10)重启apache服务器和 3个tomcat服务器

到此负载均衡已配置完成

测试负载均衡先测试apache

访问http://192.168.0.88/jkstatus.jsp能否正常访问

并查询其中

内容

有 3个tomcat

相关配置信息和负载介绍说明

访问http://192.168.0.88/TomcatDemo/index.jsp看能够运行

能运行

则已建立负载均衡

( 4)tomcat集群配置

(1)负载均衡配置

条件下配置tomcat集群

(2)分别修改 3个tomcat

配置文件conf/server.xml

修改内容如下修改前

<!--
<Cluster

Name="org.apache.catalina.cluster.tcp.SimpleTcpCluster"
managerClassName="org.apache.catalina.cluster.session.DeltaManager"
expireSessionsOnShutdown="false"
useDirtyFlag="true"
not

yListenersOnReplication="true">

<Membership

Name="org.apache.catalina.cluster.mcast.McastService"
mcastAddr="228.0.0.4"
mcastPort="45564"
mcastFrequency="500"
mcastDropTime="3000"/>

<Receiver

Name="org.apache.catalina.cluster.tcp.ReplicationListener"
tcpListenAddress="auto"
tcpListenPort="4001"
tcpSelectorTimeout="100"
tcpThreadCount="6"/>

<Sender

Name="org.apache.catalina.cluster.tcp.ReplicationTransmitter"
replicationMode="pooled"
ackTimeout="5000"/>

<Valve

Name="org.apache.catalina.cluster.tcp.ReplicationValve"
filter=".*\.g

;.*\.js;.*\.jpg;.*\.png;.*\.htm;.*\.html;.*\.css;.*\.txt;"/>

<Deployer

Name="org.apache.catalina.cluster.deploy.FarmWarDeployer"
tempDir="/tmp/war-temp/"
deployDir="/tmp/war-deploy/"
watchDir="/tmp/war-listen/"
watchEnabled="false"/>

<ClusterListener

Name="org.apache.catalina.cluster.session.ClusterSessionListener"/>
</Cluster>
-->

修改后

<!-- mod

y by whh -->
<Cluster

Name="org.apache.catalina.cluster.tcp.SimpleTcpCluster"
managerClassName="org.apache.catalina.cluster.session.DeltaManager"
expireSessionsOnShutdown="false"
useDirtyFlag="true"
not

yListenersOnReplication="true">

<Membership

Name="org.apache.catalina.cluster.mcast.McastService"
mcastAddr="228.0.0.4"
mcastPort="45564"
mcastFrequency="500"
mcastDropTime="3000"/>

<Receiver

Name="org.apache.catalina.cluster.tcp.ReplicationListener"
tcpListenAddress="auto"
tcpListenPort="4001"
tcpSelectorTimeout="100"
tcpThreadCount="6"/>

<Sender

Name="org.apache.catalina.cluster.tcp.ReplicationTransmitter"
replicationMode="pooled"
ackTimeout="5000"/>

<Valve

Name="org.apache.catalina.cluster.tcp.ReplicationValve"
filter=".*\.g

;.*\.js;.*\.jpg;.*\.png;.*\.htm;.*\.html;.*\.css;.*\.txt;"/>

<Deployer

Name="org.apache.catalina.cluster.deploy.FarmWarDeployer"
tempDir="/tmp/war-temp/"
deployDir="/tmp/war-deploy/"
watchDir="/tmp/war-listen/"
watchEnabled="false"/>

<ClusterListener

Name="org.apache.catalina.cluster.session.ClusterSessionListener"/>
</Cluster>
<!-- mod

y by whh -->

将集群配置选项

注释放开即可

如上

(3)重启 3个tomcat.到此tomcat

集群已配置完成

标签：f5负载均衡负载均衡器负载均衡 tomcat负载均衡

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首页 »Java教程 » tomcat负载均衡:实战中整理出tomcat集群和负载均衡 »正文

tomcat负载均衡:实战中整理出tomcat集群和负载均衡

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