linux下apache+tomcat集群详细配置
2014-10-26 22:49
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环境: 操作系统均为:CentOS 5.1 Apache2.X服务器一台:IP地址192.168.232.4;安装路径/usr/local/apache; Tomcat6服务器一台:IP地址192.168.232.5;安装路径/usr/local/tomcat; Tomcat6服务器一台:IP地址192.168.232.6;安装路径/usr/local/tomcat; 配置: Apache安装: #./configure --prefix=/usr/local/apache --enable-modules=so --enable-mods-shared=all --enable-proxy --enable-proxy-connect --enable-proxy-ftp --enable-proxy-http --enable-proxy-ajp --enable-proxy-balancer --enable-rewrite 注释:激活tomcat集群需要的 enable-proxy,enable-proxy-http,enable-proxy-connect,enable-proxy-ajp和enable-proxy-balancer,其中proxy-ajp和proxy-balancer必须依赖proxy,如果是自定义的编译除了以上几个必须的模块外,mod_status也要编译进去,切记。enable-proxy-ftp可以不编译。 #make;make install 制作Apache启动项: #cp support/apachectl /etc/rc.d/init.d/httpd #vi /etc/rc.d/init.d/httpd 添加以下内容:(包括#号) # Startup script for the Apache Web Server # chkconfig: 2345 85 15 # description: Apache is a World Wide Web server .It is used to server # HTML files and CGI. # processname: httpd # pidfile: /usr/local/apache/log/httpd.pid # config: /usr/local/apache/conf/httpd.conf 增加服务项 #chkconfig --add httpd #chmod 755 /etc/rc.d/init.d/httpd #chkconfig --level 345 httpd on JDK安装: #chmod a+x jdk-6u4-linux-i586-rpm.bin #./jdk-6u4-linux-i586-rpm.bin JAVA环境变量设置: #vi /etc/profile 在文件最后添加以下内容: JAVA_HOME=/usr/java/jdk1.6.0_04 CLASSPATH=.:$JAVA_HOME/lib/tools.jar:$JAVA_HOME/lib/dt.jar PATH=$JAVA_HOME/bin:$PATH CATALINA_HOME=/usr/local/tomcat export JAVA_HOME CLASSPATH PATH CATALINA_HOME 执行如下命令使环境变量生效: source /etc/profile 测试配置是否成功: java –version Tomcat安装: #wget #tar zxvf apache-tomcat-6.0.16.tar.gz #mv apache-tomcat-6.0.16 /usr/local/tomcat Tomcat随机启动: #vi /etc/rc.local 添加以下内容: /usr/local/tomcat/bin/startup.sh tomcat6配置文件server.xml: 把 <!-- You should set jvmRoute to support load-balancing via AJP ie : <Engine name="Standalone" defaultHost="localhost" jvmRoute="jvm1"> --> <Engine name="Catalina" defaultHost="localhost"> 改成 <!-- You should set jvmRoute to support load-balancing via AJP ie : --> <Engine name="Standalone" defaultHost="localhost" jvmRoute="tomcatX"> <!-- <Engine name="Catalina" defaultHost="localhost"> --> 说明: 第一台tomcat就把jvmRoute="tomcat1" 第二台tomcat就把jvmRoute="tomcat2" 把 <!-- <Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"/> --> 去掉注释变为 <Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"/> ***群集详细配置*** <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> 配置应用的web.xml: 在每个webapps应用中,修改配置文件web.xml文件 添加元素<distributable/> 在web.xml文件中<web-app>元素下增加以下内容: <!--此应用将与群集服务器复制Session--> <distributable/> 具体修改如下: 修改前: <?xml version="1.0" encoding="ISO-8859-1"?> <web-app xmlns="" xmlns:xsi="" xsi:schemaLocation=" /web-app_2_5.xsd" version="2.5"> </web-app> 修改后: <?xml version="1.0" encoding="ISO-8859-1"?> <web-app xmlns="" xmlns:xsi="" xsi:schemaLocation=" /web-app_2_5.xsd" version="2.5"> <!--此应用将与群集服务器复制Session--> <distributable/> </web-app> 配置apache的ajp负载均衡功能: 确保将以下Module的注释去掉 LoadModule proxy_module modules/mod_proxy.so LoadModule proxy_connect_module modules/mod_proxy_connect.so LoadModule proxy_ftp_module modules/mod_proxy_ftp.so LoadModule proxy_http_module modules/mod_proxy_http.so LoadModule proxy_ajp_module modules/mod_proxy_ajp.so LoadModule proxy_balancer_module modules/mod_proxy_balancer.so LoadModule status_module modules/mod_status.so 增加以下内容: # Proxypass Config Include conf/extra/httpd-modproxy.conf 建立文件httpd-modproxy.conf输入内容: <Location /server-status> SetHandler server-status Order Deny,Allow Deny from all Allow from all </Location> <Location /balancer-manager> SetHandler balancer-manager Order Deny,Allow Deny from all Allow from all </Location> ProxyRequests Off ProxyPass / balancer://tomcatcluster stickysession=jsessionid nofailover=On <Proxy balancer://tomcatcluster> BalancerMember loadfactor=1 BalancerMember loadfactor=2 </Proxy> 注释: ProxyRequests Off 表示启用反向代理,必须开启; ProxyPass为代理转发的Url,即将所有访问/的请求转发到群集balancer://tomcatcluster,这里为/即将所有访问/的请求转发到群集balancer://tomcatcluster的/test目录; BalancerMember为群集的成员,即群集服务器1或2,负载均衡服务器会根据均衡规则来将请求转发给BalancerMember; 调试负载均衡集群系统: 访问apache服务器的web服务: 如果显示负载均衡有关信息则说明成功了,接着可以访问即访问到了tomcat的应用 ***必须先启动Tomcat服务再启动Apache服务!*** 参考文档:
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