Detailed configuration of Apache + Tomcat clusters in Linux

Environment: the operating system is centos 5.1 apache2.x server: IP address 192.168.232.4; installation path:/usr/local/Apache; tomcat6 server: IP address 192.168.232.5; installation path:/usr/local/tomcat; tomcat6 server: IP address 192.168.232.6; installation path:/usr/local/tomcat; configuration: Apache installation :#. /configure -- prefix =/usr/local/Apache -- enable-modules = so -- enable-mods-shared = all -- enable-proxy-connect -- enable-proxy- FTP -- enable-proxy-HTTP -- enable-proxy-AJP -- enable-proxy-balancer -- Enable-Rewrite: Enable-proxy, enable-proxy-HTTP, enable-proxy-connect, enable-proxy-AJP, and enable-proxy-balancer required to activate the Tomcat cluster, the proxy-AJP and proxy-balancer must depend on the proxy. For custom compilation, mod_status must be compiled in addition to the preceding modules. Enable-proxy-FTP can not be compiled. # Make; make install: # cp support/apachectl/etc/rc. d/init. d/httpd # vi/etc/rc. d/init. d/httpd Add the following content: (including #) # 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. add a service item in conf # chkconfig -- add HTTP D # chmod 755/etc/rc. d/init. d/httpd # chkconfig -- level 345 httpd on JDK installation: # chmod A + x jdk-6u4-linux-i586-rpm.bin #. /jdk-6u4-linux-i586-rpm.bin Java environment variable settings: # vi/etc/profile Add the following content at the end of the file: java_home =/usr/Java/jdk1.6.0 _ 04 classpath =.: $ java_home/lib/tools. jar: $ java_home/lib/DT. jarpath = $ java_home/bin: $ pathcatalina_home =/usr/local/tomcatexport java_home classpath path catalina_home execute the following command to make the environment variable take effect: Source/etc/profi Le test configuration successful: Java-version tomcat installation: # wget [url] unzip zxvf apache-tomcat-6.0.16.tar.gz # mv APACHE-Tomcat-6.0.16/usr/local/tomcat Tomcat random start: # vi/etc/rc. add the following content to local:/usr/local/tomcat/bin/startup. sh tomcat6 configuration file server. XML: Set <! -- You shoshould set jvmroute to support load-balancing via AJP ie: <engine name = "standalone" defaulthost = "localhost" jvmroute = "jvm1"> --> <engine name = "Catalina" defaulthost = "localhost"> changed to <! -- You shoshould set jvmroute to support load-balancing via AJP ie: --> <engine name = "standalone" defaulthost = "localhost" jvmroute = "tomcatx"> <! -- <Engine name = "Catalina" defaulthost = "localhost"> --> description: for the first Tomcat server, set jvmroute = "tomcat1" and for the second Tomcat server, set jvmroute = "tomcat2" <! -- <Cluster classname = "org. apache. catalina. ha. TCP. simpletcpcluster "/> --> remove the comment and change it to <cluster classname =" org. apache. catalina. ha. TCP. simpletcpcluster "/> *** detailed cluster configuration *** <cluster classname =" org. apache. catalina. ha. TCP. simpletcpcluster "channelsendoptions =" 8 "> <manager classname =" org. apache. catalina. ha. session. deltamanager "expiresessionsonshutdown =" false "yylistenersonreplication =" 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 "/> <Cycler 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. replicationt Ransmitter "> <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> Configure the web. XML: In each webapps, modify the Web configuration file. add an element to the XML file <distributable/> on the web. add the following content to the <web-app> element of the XML file: <! -- This application will copy the session with the cluster server --> <distributable/> the specific modification is as follows: before modification: <? XML version = "1.0" encoding = "ISO-8859-1"?> <Web-app xmlns = "[url] http://java.sun.com/xml/ns/javaee#/url]" xmlns: xsi = "http://www.w3.org/2001/XMLSchema-instance" xsi: schemalocation = "http://java.sun.com/xml/ns/javaee [url] http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd#/url]" version = "2.5"> </Web-app> after modification: <? XML version = "1.0" encoding = "ISO-8859-1"?> <Web-app xmlns = "[url] http://java.sun.com/xml/ns/javaee#/url]" xmlns: xsi = "http://www.w3.org/2001/XMLSchema-instance" xsi: schemalocation = "http://java.sun.com/xml/ns/javaee [url] Author" version = "2.5"> <! -- This application copies the session with the cluster server --> <distributable/> </Web-app> to configure Apache's AJP load balancing function: ensure that the following module annotations are removed from 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 modules/mod_pr Oxygen _balancer.so loadmodule status_module modules/mod_status.so Add the following content: # proxypass configinclude CONF/extra/httpd-modproxy.conf Build File httpd-modproxy.conf inputs: <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 proxy Pass/balancer: // tomcatcluster stickysession = JSESSIONID nofailover = on <proxy balancer: // tomcatcluster> balancermember [url] http: // 192.168.232.5: 8080 [/url] loadfactor = 1 balancermember [url] http: // 192.168.232.6: 8080 [/url] loadfactor = 2 </Proxy> Note: proxyrequests off indicates that reverse proxy is enabled, must be enabled. proxypass is the proxy forwarding URL, which forwards all access/requests to the cluster balancer: // tomcatcluster. Here,/forwards all access/requests to the cluster balancer: // The/test directory of tomcatcluster; balancerme The mber is a member of the cluster, that is, the Cluster Server 1 or 2. The Server Load balancer server forwards requests to the balancermember according to the balancing rules. debug the Server Load balancer Cluster System: access the Web Service of the Apache server: [url] http: // 192.168.232.4/balancer-manager [/url] If the Server Load balancer information is displayed, the operation is successful. Then, you can access [url] HTTP: // 192.168.232.4/[/url] indicates that the Tomcat application is accessed. *** you must start the Tomcat service and then start the apache service! * ** Reference: [url] http://tomcat.apache.org/tomcat-6.0-doc/cluster-howto.html#/url] [url] #[ url] #[ url] #[ url] #