apache+tomcat负载集群

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Apache +tomcat集群

安装环境

系统cenos4.6，jdk，tomcat5.5,

安装包准备

apache-tomcat-5.5.26.tar

httpd-2.2.10.tar

jdk-6u2-linux-i586-rpm

tomcat-connectors-1.2.25-src.tar

1.安装jdk环境

安装包

jdk-6u2-linux-i586-rpm.bin

chmod u+x jdk-6u2-linux-i586-rpm.bin //增加可执行权限

./jdk-6u2-linux-i586-rpm.bin

一直翻到最后一页，选择Y,即可完成安装

cd /usr/java

ln -s jdk1.6.0_02 jdk

ln -s jdk1.6.0_02/jre /usr/local/jre

cd /usr/bin

rm -rf java

rm -rf javac

然后在usr/bin

ln -s /usr/java/jdk1.6.0_02/bin/java /usr/bin/java

ln -s /usr/javac/jdk1.6.0_02/bin/javac /usr/bin/javac

设置环境变量 vi /etc/profile

JAVA_HOME=/usr/local/jdk

export JAVA_HOME

JRE_HOME=/usr/local/jre

export JRE_HOME

CLASSPATH=/usr=/usr/local/tomcat/common/lib/:/usr/local/jdk/lib:/usr/local/jre/lib

export CLASSPATH

PATH=$PATH:/usr/local/tomcat/bin/:/usr/local/apache/bin:/usr/local/jdk/bin:/usr/local/jre/bin

export PATH

TOMCAT_HOME=/usr/local/tomcat

export TOMCAT_HOME

2. 安装tomcat

直接解压缩apache-tomcat-5.5.26.tar

tar xzvf apache-tomcat-5.5.26.tar

mv apache-tomcat-5.5.26 /usr/local

cd /usr/local

ln -s apache-tomcat-5.5.26 tomcat1

安装第一个tomcat

然后直接

cp -rf apache-tomcat-5.5.26 apache-tomcat-5.5.26-2

ln -s apache-tomcat-5.5.26-2 tomcat2

设置tomcat1的环境变量

export CATALINA_HOME=/usr/local/tomcat

export TOMCAT_HOME=/usr/local/tomcat

设置tomcat 自启动

vi /etc/rc.d/init.d/tomcat1

#--------------------------------------------------------

#!/bin/sh

export JAVA_HOME=/usr/java/default

export CATALINA_HOME=/usr/local/tomcat

case "$1" in

'start')

/usr/local/tomcat/bin/startup.sh

touch /var/lock/subsys/tomcat

;;

'stop')

/usr/local/tomcat/bin/shutdown.sh

rm -f /var/lock/subsys/tomcat

;;

'restart')

$0 stop

$0 start

;;

echo "Usage: tomcat { start | stop | restart }"

exit 1

esac

exit 0

#-----------------------------------------------------

vi /etc/rc.d/init.d/tomcat2

#--------------------------------------------------------

#!/bin/sh

export JAVA_HOME=/usr/java/default

export CATALINA_HOME=/usr/local/tomcat2

case "$1" in

'start')

/usr/local/tomcat2/bin/startup.sh

touch /var/lock/subsys/tomcat2

;;

'stop')

/usr/local/tomcat2/bin/shutdown.sh

rm -f /var/lock/subsys/tomcat2

;;

'restart')

$0 stop

$0 start

;;

echo "Usage: tomcat2 { start | stop | restart }"

exit 1

esac

exit 0

#-----------------------------------------------------

chmod u+x /etc/rc.d/init.d/tomcat1

chmod u+x /etc/rc.d/init.d/tomcat2

此时两个tomcat就都装成功了

3.安装apache环境

安装包是 httpd-2.2.8.tar.gz

安装包在/install/下面

tar -xzvf httpd-2.2.8.tar.gz

目录 httpd-2.2.8

---------------------------------------------------

cd /install/httpd-2.2.8

cd srclib/apr

./configure --prefix=/usr/local/apr

make

make install

---------------------------------------------------

cd srclib/apr-util

./configure --prefix=/usr/local/apr-util /

> --with-apr=/usr/local/apr

make

make install

--------------------------------------------------

cd /install/httpd-2.2.8/

./configure --prefix=/usr/local/apache /

> --enable-so /

> --enable-rewrite=share /

> --enable-deflate /

> --with-mpm=worker /

> --with-apr=/usr/local/apr /

> --with-apr-util=/usr/local/apr-util /

> --with-java-home=/usr/local/jdk

-----------------------------------------------------

加载jk模块

安装包是jakarta-tomcat-connectors-1.2.15-src.tar.gz

tar -xzvf jakarta-tomcat-connectors-1.2.15-src.tar.gz

压缩后文件：tomcat-connectors-1.2.25-src

cd /home/install/tomcat-connectors-1.2.25-src

cd native/

./configure --with-apxs=/usr/local/apache/bin/apxs

make

make install

//此时查看/usr/local/apache/modules 下面有没有mod_jk.so

--------------------------------------------------------

查看

/usr/local/apache/bin/httpd -l //看看是否有mod_deflate.c 和 worker.c模块,如果有说明安装成功

新建自启动

vi /etc/rc.d/init.d/httpd

#-----------------------------------------------------

#!/bin/sh

case "$1" in

'start')

/usr/local/apache/bin/apachectl start

touch /var/lock/subsys/httpd

;;

'stop')

/usr/local/apache/bin/apachectl stop

rm -f /var/lock/subsys/httpd

;;

'restart')

$0 stop

$0 start

;;

echo "Usage: httpd { start | stop | restart }"

exit 1

esac

exit 0

#-----------------------------------------------------

chmod a+x /etc/rc.d/init.d/httpd

启动apache

service httpd start

ps ux

查看服务已经启动

------------------------------------------------------

3. 配置apache

cd /usr/local/apache/conf

vi httpd.conf

-------------------------------------------------------

在最后新增

LoadModule jk_module modules/mod_jk.so

JkWorkersFile /usr/local/apache/conf/jk/workers.properties

JkShmFile logs/mod_jk.shm

JkLogFile /usr/local/tomcat/logs/mod_jk.log

JkLogLevel info

JkMount /*.jsp controller

JkMount /*.html controller

JkMount /*.do controller

JkMount /*.* controller

JkMount / controller

JkMount /*/ controller

------------------------------------------------------

配置JK

vi /usr/local/apache/conf/jk/workers.properties

添加如下

#workers.tomcat_home=/usr/local/tomcat //如果tomcat都在一台机器上不用此条

workers.java_home=/usr/local/jdk

ps=/

worker.list=controller

#------配置tomcat1-------------

worker.tomcat1.port=8009

worker.tomcat1.host=localhost

worker.tomcat1.type=ajp13

worker.tomcat1.lbfactor=1

#-----配置tomcat2--------------

worker.tomcat2.port=9009

worker.tomcat2.host=192.168.1.240

worker.tomcat2.type=ajp13

worker.tomcat2.lbfactor=1

#-----配置controller负载均衡

worker.controller.type=lb

worker.controller.balance_workers=tomcat1,tomcat2

worker.controller.sticky_session=1

#注：tomcat1和 tomcat2 须是tomcat中server.xml中的jvmRoute="tomcat1"指定的名字

----------------------------------------------------------------

tomcat集群配置，session同步配置

---------------------------------------------------------------------------------

tomcat1配置

vi /usr/local/tomcat1/conf/server.xml

修改Engine节点，找到<Engine name="Catalina" defaultHost="localhost">

修改为<Engine name="Catalina" defaultHost="localhost"，jvmRoute="tomcat1">

如果上面还有Engine 节点，就注释掉

找到cluster节点，把整个cluster的注释去掉

然后修改

<Membership

className="org.apache.catalina.cluster.mcast.McastService"

mcastBindAddress="192.168.1.240"

mcastAddr="224.0.0.1"

mcastPort="45564"

mcastFrequency="500"

mcastDropTime="3000"/>

<Receiver

className="org.apache.catalina.cluster.tcp.ReplicationListener"

tcpListenAddress="192.168.1.240"

tcpListenPort="4001"

tcpSelectorTimeout="100"

tcpThreadCount="6"/>

#192.168.1.240 为本机IP地址

-------------------------------------------------------------------------------------

tomcat2配置

1. tomcat为本机

vi /usr/local/tomcat2/conf/server.xml

修改Engine节点，找到<Engine name="Catalina" defaultHost="localhost">

修改为<Engine name="Catalina" defaultHost="localhost"，jvmRoute="tomcat2">

<Membership

className="org.apache.catalina.cluster.mcast.McastService"

mcastBindAddress="192.168.1.240"

mcastAddr="224.0.0.1"

mcastPort="45564"

mcastFrequency="500"

mcastDropTime="3000"/>

<Receiver

className="org.apache.catalina.cluster.tcp.ReplicationListener"

tcpListenAddress="192.168.1.240"

tcpListenPort="4002" //这一步一定要做

tcpSelectorTimeout="100"

tcpThreadCount="6"/>

#192.168.1.240 为本机IP地址

修改端口8005，8080，8009，8082分别更改为

9005，9080，9009，9082

------------------------------------------------------------------------------------

2.tomcat为另外一台机器

vi /usr/local/tomcat2/conf/server.xml

修改Engine节点，找到<Engine name="Catalina" defaultHost="localhost">

修改为<Engine name="Catalina" defaultHost="localhost"，jvmRoute="tomcat2">

修改

<Membership

className="org.apache.catalina.cluster.mcast.McastService"

mcastBindAddress="192.168.1.238"

mcastAddr="228.0.0.4"

mcastPort="45564"

mcastFrequency="500"

mcastDropTime="3000"/>

<Receiver

className="org.apache.catalina.cluster.tcp.ReplicationListener"

tcpListenAddress="192.168.1.238"

tcpListenPort="4001"

tcpSelectorTimeout="100"

tcpThreadCount="6"/>

3. 添加应用

WEB_INF 下面的web.xml里面必须添加<distributable/>

只要添加在</web-app>之前就可以

--------------------------------------------------------------------------------------

测试广播是否可用

首先需要开启网卡组播功能

route add -net 224.0.0.0 netmask 240.0.0.0 dev eth0

java -cp tomcat-replication.jar MCaster 224.0.0.1 45564 Terminal1

java -cp tomcat-replication.jar MCaster 224.0.0.1 45564 Terminal2

这时需要下载tomcat-replication.jar 包，http://cvs.apache.org/~fhanik/tomcat-replication.jar

进行测试（这一步主要是测试组播是否可用，不进行也可以)

----------------------------------------------------------------------------------------

简单添加应用

webapps 下新建test 目录

目录下建WEB-INF目录下的web.xml文件

<web-app xmlns="http://java.sun.com/xml/ns/j2ee"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee [url]http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd[/url]"

version="2.4">

<display-name>TomcatDemo</display-name>

</web-app>

再在webapps 下建立print.jsp test.jsp

Print.jsp :

System.out.println("www.linuxtone.org liuyu.blog.51cto.com");

test.jsp

<%@ page contentType="text/html; charset=GBK" %>

<%@ page import="java.util.*" %>

<html><head><title>Cluster App Test</title></head>

<body>

Server Info:

out.println(request.getLocalAddr() + " : " + request.getLocalPort()+"<br>");%>

out.println("<br> ID " + session.getId()+"<br>");

String dataName = request.getParameter("dataName");

session.setAttribute("myname","session?");

if (dataName != null && dataName.length() > 0) {

String dataValue = request.getParameter("dataValue");

session.setAttribute(dataName, dataValue);

}

out.print("<b>Session P±?b>");

Enumeration e = session.getAttributeNames();

while (e.hasMoreElements()) {

String name = (String)e.nextElement();

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

out.println( name + " = " + value+"<br>");

System.out.println( name + " = " + value);

}

?3?<input type=text size=20 name="dataName">

<br>

?:<input type=text size=20 name="dataValue">

<br>

</form>

</body>

</html>

重启所有的服务。

此时，开启两个浏览器，分别浏览

192.168.1.240，分别得到tomcat1

和tomcat2的页面，就表明

已经集群成功了