linux tomcat集群配置笔记

趁最后一天假期,配置linux环境下的apache集群,巩固下,免的以后用到又忘记,网上东拼息凑,环境弄好后,整到blog,以便以后用到。

参考来源：http://www.linuxidc.com/Linux/2011-03/32859.htm

我用的版本：

httpd-2.2.21.tar.gz

apache-tomcat-6.0.32.tar.gz

jdk-6u26-linux-i586.bin

jdk,和tomcat 环境配置忽略

a.在 /opt目录新增apache目录并将httpd-2.2.21.tar.gz copy到改目录中.

cd /opt

mkdir apache

tar zxf httpd-2.2.21.tar.gz

cd httpd-2.2.21

然后配置 httped prefix

./configure --prefix=/opt/web/apache2 --enable-mods-shared=most # --prefix后面的红色路径可以根据实际情况自定义

然后屏幕会显示一大堆配置信息,完成后

make #开始编译

make install #编译后,进入安装阶段

cd /opt/solft/apache2/bin

./apachectl -k start #启动apache服务

如果如下提示信息,代表成功了

httpd: Could not reliably determine the server's fully qualified domain name, using 127.0.1.1 for ServerName

在浏览器中输入http://127.0.0.1/ 就可以看到 It works!
b.开始安装 mod_proxy.so和mod_proxy_ajp.so,mod_proxy_balancer.so模块
cd /opt/apache/httpd-2.2.21/modules/proxy
/opt/web/apache2/bin/apxs -i -a -c mod_proxy.c proxy_util.c

/opt/web/apache2/bin/apxs -i -a -c mod_proxy_ajp.c ajp*.c
/opt/web/apache2/bin/apxs -i -a -c mod_proxy_balancer.c

c.配置httpd.conf
vim /opt/web/apache2/conf/httpd.conf
ProxyPass /images !
ProxyPass /css !
ProxyPass /js !
ProxyRequests Off

ProxyPass /examples balancer://mycluster/ stickysession=JSESSIONID

ProxyPassReverse /examples balancer://mycluster/ stickysession=JSESSIONID

<Proxy balancer://mycluster>

BalancerMember ajp://192.168.1.102:8009/examples/ route=worker1 loadfactor=1

BalancerMember ajp://192.168.1.102:8909/examples/ route=worker2 loadfactor=1

</Proxy>

SetHandler balancer-manager

如图



#上面ip端口红色部分与apache-tomcat-x.x.x/config/server.xml 中<Connector port="8009" protocol="AJP/1.3" redirectPort="8443" /> 中的端口保持一直

d.编辑tomcat1/apache-tomcat-6.0.32/config/server.xml

server.xml文件,如果tomcat在不同机器上，则不需要修改，本人环境是本机上测试.所以其中的一个tomcat的端口一定要修改

需要修改的地方（红色部分）

<Connector port="8080" protocol="HTTP/1.1"

connectionTimeout="20000"

redirectPort="8443" />

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

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

把这段信息<Engine name="Catalina" defaultHost="localhost"/>

用下面的配置信息覆盖,如果在本机中红色端口需要修改，jvmRoute参数不能一样

<Engine name="Catalina" defaultHost="localhost" jvmRoute="worker1"/>

<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="192.168.1.102"

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>

e.配置tomcat.x.x.x/webapps/examples/WEB-INF/web.xml,加上红色部分，以支持seesion复制

在<webapp>

...........

.........

<distributable/>

</webapp>

最后.复制tomcat下webapps下的文件到 /opt/web/apache2/htdocs

cp –R /opt/web/tomcat1/apache-tomcat-6.0.32/webapps/* /opt/web/apache2/htdocs

到这里负载均衡和session复配置已经完成

开始启动 apache2

cd /opt/web/apache2/bin

./apachectl -k start

启动2个tomcat

cd /opt/web/tomcat2/apache-tomcat-6.0.32/bin

./start.sh

cd /opt/web/tomcat1/apache-tomcat-6.0.32/bin

./start.sh

测试session 复制
http://192.168.1.102/examples/servlets/servlet/SessionExample
查看负载均衡
http://192.168.1.102/balancer-manager
但是有个问题，如果session有很多对象，而对象又不停的变化，这就使得seesion会消耗很大性能.

网上查了下,可以用memcached来做缓存应用.有时间再把这个整理下

转自：http://www.cnblogs.com/montya/archive/2011/10/07/2190688.html