CentOS下Apache + Tomcat集群
1.以下几个包是需要下载的Tomcat http://apache.etoak.com/tomcat/tomcat-7/v7.0.27/bin/apache-tomcat-7.0.27.tar.gz
Aprhttp://labs.renren.com/apache-mirror//apr/apr-1.4.6.tar.gz
Apr Util http://apache.etoak.com//apr/apr-util-1.4.1.tar.gz
Apache Http Server http://labs.renren.com/apache-mirror//httpd/httpd-2.2.22.tar.gz
Connectorhttp://www.apache.org/dist/tomcat/tomcat-connectors/jk/tomcat-connectors-1.2.35-src.tar.gz
2.安装APR
#tar -zxvf apr-1.4.6.tar.gz
#cd apr-1.4.6
#./buildconfbuildconf: checking installation...buildconf: python version 2.6.5 (ok)buildconf: autoconf not found. You need autoconf version 2.59 or newer installed to build APR from SVN.#yum install autoconf#./buildconfbuildconf: libtool not found. You need libtool version 1.4 or newer installed to build APR from SVN.#yum install libtool#./configure# make-bash: make: command not found#yum install make# make# make install
3.安装APR Utils
# tar -zxvf apr-util-1.4.1.tar.gz# cd apr-util-1.4.1#./buildconf --with-apr=/app/apr-1.4.6# ./configure --with-apr=/app/apr-1.4.6#make#make install
4.安装Apache Http Server
# tar -zxvf httpd-2.2.22.tar.gz# cd httpd-2.2.22# ./buildconf# ./configure# make# make install
5.安装Apache 和 Tomcat 的连接器Connector
tar -zxvf tomcat-connectors-1.2.35-src.tar.gzcd tomcat-connectors-1.2.35-src/native# ./configure --with-apxs=/usr/local/apache2/bin/apxs#make#make install
注意：该tar.gz文件里面其实有很多关于配置的详细文档，如果出现问题可以再其中进行查阅,另外，我的编译应该说是成功了，但是生成的文件却不能用，后来是去网上下载了个已经编译好了的才解决的
6.配置Apache Http Server
原文是说Apache 的httpd.conf是在/usr/local/apache2/conf/目录下面，但是实际上我发现控制Apache的文件却是在/etc/httpd/conf/目录下面，这点还请高手赐教
在文件最后加上下面一句话就可以了
Include conf/mod_jk.conf
7.在httpd.conf文件同一目录下建立mod_jk.conf文件，内容如下：
#加载mod_jk ModuleLoadModule jk_module modules/mod_jk.so#指定 workers.properties文件路径JkWorkersFile conf/workers.properties#指定那些请求交给tomcat处理,"controller"为在workers.propertise里指定的负载分配控制器JkMount /*.jsp controller
8.在httpd.conf同目录下新建 workers.properties文件，内容如下：
worker.list = controller,tomcat1,tomcat2#server 列表#========tomcat1========worker.tomcat1.port=8009 #ajp13 端口号，在tomcat下server.xml配置,默认8009worker.tomcat1.host=localhost#tomcat的主机地址，如不为本机，请填写ip地址worker.tomcat1.type=ajp13worker.tomcat1.lbfactor = 1 #server的加权比重，值越高，分得的请求越多#========tomcat2========worker.tomcat2.port=9009 #ajp13 端口号，在tomcat下server.xml配置,默认8009worker.tomcat2.host=localhost#tomcat的主机地址，如不为本机，请填写ip地址worker.tomcat2.type=ajp13worker.tomcat2.lbfactor = 1 #server的加权比重，值越高，分得的请求越多#========controller,负载均衡控制器========worker.controller.type=lbworker.controller.balanced_workers=tomcat1,tomcat2 #指定分担请求的tomcatworker.controller.sticky_session=1
9.解压apache-tomcat-7.0.27.tar.gz，并copy一份，home目录分别命名为tomcat1，tomcat2
# tar -zxvf apache-tomcat-7.0.27.tar.gz# mv apache-tomcat-7.0.27 tomcat1# cp -R tomcat1/ tomcat2
10.更改tomcat2的server.xml文件，由于我的两个tomcat是在同一个服务器上，所以要修改下面红颜色的端口，以防端口冲突.
<Server port="9005" shutdown="SHUTDOWN">
<Connector port="9080" protocol="HTTP/1.1" connectionTimeout="20000" redirectPort="8443" />
这个是APJ端口：
<Connector port="9009" protocol="AJP/1.3" redirectPort="8443" />
11.下面是关于负载均衡的配置，在2个tomcat的server.xml中：
<!-- You should set jvmRoute to support load-balancing via AJP ie :<Engine name="Catalina" defaultHost="localhost" jvmRoute="jvm1">--><Engine name="Catalina" defaultHost="localhost" jvmRoute="tomcat2"><!--tomcat2将与tomcat1黏贴session 在这里指定黏贴对象-->
下面这段代码也是必须的，注意端口不能重复：
<Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster" channelSendOptions="6"> <Manager className="org.apache.catalina.ha.session.DeltaManager" expireSessionsOnShutdown="false" notifyListenersOnReplication="true"/> <!-- <Manager className="org.apache.catalina.ha.session.BackupManager" expireSessionsOnShutdown="false" notifyListenersOnReplication="true" mapSendOptions="6"/> --> <Channel className="org.apache.catalina.tribes.group.GroupChannel"> <Membership className="org.apache.catalina.tribes.membership.McastService" address="228.0.0.5" port="45564" frequency="500" dropTime="3000"/> <Receiver className="org.apache.catalina.tribes.transport.nio.NioReceiver" address="auto" port="4000"<!--tomcat1将与tomcat2的端口不同--> selectorTimeout="100" 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=".*/.gif;.*/.js;.*/.jpg;.*/.png;.*/.htm;.*/.html;.*/.css;.*/.txt;"/> <ClusterListener className="org.apache.catalina.ha.session.JvmRouteSessionIDBinderListener"/> <ClusterListener className="org.apache.catalina.ha.session.ClusterSessionListener"/> </Cluster>
这是最后我遇到的问题和解决方法：
如果mod_jk.so权限组出现问题请使用一下命令：
chcon -t httpd_modules_t /usr/local/apache2/modules/mod_jk.so
错误: undefined symbol: ap_get_server_description
解决办法：下载编译好的文件http://archive.apache.org/dist/tomcat/tomcat-connectors/jk/binaries/linux/jk-1.2.30/i586/
如果启动Httpd失败但是没有错误信息，要检查/etc/httpd/logs下的error_log文件
如果是因为SELinux的问题，可以关闭之
转自：http://blog.csdn.net/daihui05/article/details/7524745
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