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Viewing file: Select action/file-type: ================================================================================ Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. ================================================================================ $Id: RUNNING.txt 1456725 2013-03-14 23:48:06Z kkolinko $ =================================================== Running The Apache Tomcat 7.0 Servlet/JSP Container =================================================== Apache Tomcat 7.0 requires a Java Standard Edition Runtime Environment (JRE) version 6 or later. ============================= Running With JRE 6 Or Later ============================= (1) Download and Install a Java SE Runtime Environment (JRE) (1.1) Download a Java SE Runtime Environment (JRE), release version 6 or later, from http://www.oracle.com/technetwork/java/javase/downloads/index.html (1.2) Install the JRE according to the instructions included with the release. You may also use a full Java Development Kit (JDK) rather than just a JRE. (2) Download and Install Apache Tomcat (2.1) Download a binary distribution of Tomcat from: http://tomcat.apache.org/ (2.2) Unpack the binary distribution so that it resides in its own directory (conventionally named "apache-tomcat-[version]"). For the purposes of the remainder of this document, the name "CATALINA_HOME" is used to refer to the full pathname of that directory. NOTE: As an alternative to downloading a binary distribution, you can create your own from the Tomcat source code, as described in "BUILDING.txt". You can either a) Do the full "release" build and find the created distribution in the "output/release" directory and then proceed with unpacking as above, or b) Do a simple build and use the "output/build" directory as "CATALINA_HOME". Be warned that there are some differences between the contents of the "output/build" directory and a full "release" distribution. (3) Configure Environment Variables Tomcat is a Java application and does not use environment variables. The variables are used by the Tomcat startup scripts. The scripts use the variables to prepare the command that starts Tomcat. (3.1) Set CATALINA_HOME (required) and CATALINA_BASE (optional) The CATALINA_HOME environment variable should be set to the location of the root directory of the "binary" distribution of Tomcat. An example was given in (2.2) above. The Tomcat startup scripts have some logic to set this variable automatically if it is absent, based on the location of the startup script in *nix and on the current directory in Windows. That logic might not work in all circumstances, so setting the variable explicitly is recommended. The CATALINA_BASE environment variable specifies location of the root directory of the "active configuration" of Tomcat. It is optional. It defaults to be equal to CATALINA_HOME. Using distinct values for the CATALINA_HOME and CATALINA_BASE variables is recommended to simplify further upgrades and maintenance. It is documented in the "Multiple Tomcat Instances" section below. (3.2) Set JRE_HOME or JAVA_HOME (required) These variables are used to specify location of a Java Runtime Environment or of a Java Development Kit that is used to start Tomcat. The JRE_HOME variable is used to specify location of a JRE. The JAVA_HOME variable is used to specify location of a JDK. Using JAVA_HOME provides access to certain additional startup options that are not allowed when JRE_HOME is used. If both JRE_HOME and JAVA_HOME are specified, JRE_HOME is used. The recommended place to specify these variables is a "setenv" script. See below. (3.3) Other variables (optional) Other environment variables exist, besides the four described above. See the comments at the top of catalina.bat or catalina.sh scripts for the list and a description of each of them. One frequently used variable is CATALINA_OPTS. It allows specification of additional options for the java command that starts Tomcat. See the Java documentation for the options that affect the Java Runtime Environment. See the "System Properties" page in the Tomcat Configuration Reference for the system properties that are specific to Tomcat. A similar variable is JAVA_OPTS. It is used less frequently. It allows specification of options that are used both to start and to stop Tomcat as well as for other commands. Note: Do not use JAVA_OPTS to specify memory limits. You do not need much memory for a small process that is used to stop Tomcat. Those settings belong to CATALINA_OPTS. Another frequently used variable is CATALINA_PID (on *nix only). It specifies the location of the file where process id of the forked Tomcat java process will be written. This setting is optional. It will enable the following features: * better protection against duplicate start attempts and * allows forceful termination of Tomcat process when it does not react to the standard shutdown command. (3.4) Using the "setenv" script (optional, recommended) Apart from CATALINA_HOME and CATALINA_BASE, all environment variables can be specified in the "setenv" script. The script is placed either into CATALINA_BASE/bin or into CATALINA_HOME/bin directory and is named setenv.bat (on Windows) or setenv.sh (on *nix). The file has to be readable. By default the setenv script file is absent. If the script file is present both in CATALINA_BASE and in CATALINA_HOME, the one in CATALINA_BASE is preferred. For example, to configure the JRE_HOME and CATALINA_PID variables you can create the following script file: On Windows, %CATALINA_BASE%\bin\setenv.bat: set "JRE_HOME=%ProgramFiles%\Java\jre6" exit /b 0 On *nix, $CATALINA_BASE/bin/setenv.sh: JRE_HOME=/usr/java/latest CATALINA_PID="$CATALINA_BASE/tomcat.pid" The CATALINA_HOME and CATALINA_BASE variables cannot be configured in the setenv script, because they are used to locate that file. All the environment variables described here and the "setenv" script are used only if you use the standard scripts to launch Tomcat. For example, if you have installed Tomcat as a service on Windows, the service wrapper launches Java directly and does not use the script files. (4) Start Up Tomcat (4.1) Tomcat can be started by executing one of the following commands: On Windows: %CATALINA_HOME%\bin\startup.bat or %CATALINA_HOME%\bin\catalina.bat start On *nix: $CATALINA_HOME/bin/startup.sh or $CATALINA_HOME/bin/catalina.sh start (4.2) After startup, the default web applications included with Tomcat will be available by visiting: http://localhost:8080/ (4.3) Further information about configuring and running Tomcat can be found in the documentation included here, as well as on the Tomcat web site: http://tomcat.apache.org/ (5) Shut Down Tomcat (5.1) Tomcat can be shut down by executing one of the following commands: On Windows: %CATALINA_HOME%\bin\shutdown.bat or %CATALINA_HOME%\bin\catalina.bat stop On *nix: $CATALINA_HOME/bin/shutdown.sh or $CATALINA_HOME/bin/catalina.sh stop ================================================== Advanced Configuration - Multiple Tomcat Instances ================================================== In many circumstances, it is desirable to have a single copy of a Tomcat binary distribution shared among multiple users on the same server. To make this possible, you can set the CATALINA_BASE environment variable to the directory that contains the files for your 'personal' Tomcat instance. When running with a separate CATALINA_HOME and CATALINA_BASE, the files and directories are split as following: In CATALINA_BASE: * bin - Only the following files: * setenv.sh (*nix) or setenv.bat (Windows), * tomcat-juli.jar The setenv scripts were described above. The tomcat-juli library is documented in the Logging chapter in the User Guide. * conf - Server configuration files (including server.xml) * lib - Libraries and classes, as explained below * logs - Log and output files * webapps - Automatically loaded web applications * work - Temporary working directories for web applications * temp - Directory used by the JVM for temporary files (java.io.tmpdir) In CATALINA_HOME: * bin - Startup and shutdown scripts The following files will be used only if they are absent in CATALINA_BASE/bin: setenv.sh (*nix), setenv.bat (Windows), tomcat-juli.jar * lib - Libraries and classes, as explained below * endorsed - Libraries that override standard "Endorsed Standards" libraries provided by JRE. See Classloading documentation in the User Guide for details. By default this "endorsed" directory is absent. In the default configuration the JAR libraries and classes both in CATALINA_BASE/lib and in CATALINA_HOME/lib will be added to the common classpath, but the ones in CATALINA_BASE will be added first and thus will be searched first. The idea is that you may leave the standard Tomcat libraries in CATALINA_HOME/lib and add other ones such as database drivers into CATALINA_BASE/lib. In general it is advised to never share libraries between web applications, but put them into WEB-INF/lib directories inside the applications. See Classloading documentation in the User Guide for details. It might be useful to note that the values of CATALINA_HOME and CATALINA_BASE can be referenced in the XML configuration files processed by Tomcat as ${catalina.home} and ${catalina.base} respectively. For example, the standard manager web application can be kept in CATALINA_HOME/webapps/manager and loaded into CATALINA_BASE by using the following trick: * Copy the CATALINA_HOME/webapps/manager/META-INF/context.xml file as CATALINA_BASE/conf/Catalina/localhost/manager.xml * Add docBase attribute as shown below. The file will look like the following: <?xml version="1.0" encoding="UTF-8"?> <Context docBase="${catalina.home}/webapps/manager" antiResourceLocking="false" privileged="true" > <Valve className="org.apache.catalina.valves.RemoteAddrValve" allow="127\.0\.0\.1" /> </Context> See Deployer chapter in User Guide and Context and Host chapters in the Configuration Reference for more information on contexts and web application deployment. ================ Troubleshooting ================ There are only really 2 things likely to go wrong during the stand-alone Tomcat install: (1) The most common hiccup is when another web server (or any process for that matter) has laid claim to port 8080. This is the default HTTP port that Tomcat attempts to bind to at startup. To change this, open the file: $CATALINA_HOME/conf/server.xml and search for '8080'. Change it to a port that isn't in use, and is greater than 1024, as ports less than or equal to 1024 require superuser access to bind under UNIX. Restart Tomcat and you're in business. Be sure that you replace the "8080" in the URL you're using to access Tomcat. For example, if you change the port to 1977, you would request the URL http://localhost:1977/ in your browser. (2) The 'localhost' machine isn't found. This could happen if you're behind a proxy. If that's the case, make sure the proxy configuration for your browser knows that you shouldn't be going through the proxy to access the "localhost". In Firefox, this is under Tools/Preferences -> Advanced/Network -> Connection -> Settings..., and in Internet Explorer it is Tools -> Internet Options -> Connections -> LAN Settings. ==================== Optional Components ==================== The following optional components may be included with the Apache Tomcat binary distribution. If they are not included, you can install them separately. 1. Apache Tomcat Native library 2. Apache Commons Daemon service launcher Both of them are implemented in C language and as such have to be compiled into binary code. The binary code will be specific for a platform and CPU architecture and it must match the Java Runtime Environment executables that will be used to launch Tomcat. The Windows-specific binary distributions of Apache Tomcat include binary files for these components. On other platforms you would have to look for binary versions elsewhere or compile them yourself. If you are new to Tomcat, do not bother with these components to start with. If you do use them, do not forget to read their documentation. Apache Tomcat Native library ----------------------------- It is a library that allows to use the "Apr" variant of HTTP and AJP protocol connectors in Apache Tomcat. It is built around OpenSSL and Apache Portable Runtime (APR) libraries. Those are the same libraries as used by Apache HTTPD Server project. This feature was especially important in the old days when Java performance was poor. It is less important nowadays, but it is still used and respected by many. See Tomcat documentation for more details. For further reading: - Apache Tomcat documentation * Documentation for APR/Native library in the Tomcat User's Guide http://tomcat.apache.org/tomcat-7.0-doc/apr.html * Documentation for the HTTP and AJP protocol connectors in the Tomcat Configuration Reference http://tomcat.apache.org/tomcat-7.0-doc/config/http.html http://tomcat.apache.org/tomcat-7.0-doc/config/ajp.html - Apache Tomcat Native project home http://tomcat.apache.org/native-doc/ - Other projects * OpenSSL http://openssl.org/ * Apache Portable Runtime http://apr.apache.org/ * Apache HTTP Server http://httpd.apache.org/ To disable Apache Tomcat Native library: - To disable Apache Tomcat Native library when it is installed, or - To remove the warning that is logged during Tomcat startup when the library is not installed: Edit the "conf/server.xml" file and remove "AprLifecycleListener" from it. The binary file of Apache Tomcat Native library is usually named - "tcnative-1.dll" on Windows - "libtcnative-1.so" on *nix systems Apache Commons Daemon ---------------------- Apache Commons Daemon project provides wrappers that can be used to install Apache Tomcat as a service on Windows or as a daemon on *nix systems. The Windows-specific implementation of Apache Commons Daemon is called "procrun". The *nix-specific one is called "jsvc". For further reading: - Apache Commons Daemon project http://commons.apache.org/daemon/ - Apache Tomcat documentation * Installing Apache Tomcat http://tomcat.apache.org/tomcat-7.0-doc/setup.html * Windows service HOW-TO http://tomcat.apache.org/tomcat-7.0-doc/windows-service-howto.html The binary files of Apache Commons Daemon in Apache Tomcat distributions for Windows are named: - "tomcat7.exe" - "tomcat7w.exe" These files are renamed copies of "prunsrv.exe" and "prunmgr.exe" from Apache Commons Daemon distribution. The file names have a meaning: they are used as the service name to register the service in Windows, as well as the key name to store distinct configuration for this installation of "procrun". If you would like to install several instances of Tomcat 7.0 in parallel, you have to further rename those files, using the same naming scheme. |
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