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<html lang="en"><head><meta content="text/html; charset=utf-8" http-equiv="Content-Type"/><link href="/images/docs-stylesheet.css" rel="stylesheet" type="text/css"/><title>Apache Tomcat 8 (8.5.32) - Tomcat Web Application Deployment</title><meta content="Allistair Crossley" name="author"/><script data-comments-identifier="tomcat-8.5-doc/deployer-howto" type="application/javascript">
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</script></head><body><div id="wrapper"><header><div id="header"><div><div><div class="logo noPrint"><a href="http://tomcat.apache.org/"><img alt="Tomcat Home" src="/images/tomcat.png"/></a></div><div style="height: 1px;"></div><div class="asfLogo noPrint"><a href="http://www.apache.org/" target="_blank"><img alt="The Apache Software Foundation" src="/images/asf-logo.svg" style="width: 266px; height: 83px;"/></a></div><h1>Apache Tomcat 8</h1><div class="versionInfo">
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Version 8.5.32,
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<time datetime="2018-06-20">Jun 20 2018</time></div><div style="height: 1px;"></div><div style="clear: left;"></div></div></div></div></header><div id="middle"><div><div class="noprint" id="mainLeft"><div><nav><div><h2>Links</h2><ul><li><a href="/index.html">Docs Home</a></li><li><a href="http://wiki.apache.org/tomcat/FAQ">FAQ</a></li><li><a href="#comments_section">User Comments</a></li></ul></div><div><h2>User Guide</h2><ul><li><a href="/introduction.html">1) Introduction</a></li><li><a href="/setup.html">2) Setup</a></li><li><a href="/appdev/index.html">3) First webapp</a></li><li><a href="/deployer-howto.html">4) Deployer</a></li><li><a href="/manager-howto.html">5) Manager</a></li><li><a href="/host-manager-howto.html">6) Host Manager</a></li><li><a href="/realm-howto.html">7) Realms and AAA</a></li><li><a href="/security-manager-howto.html">8) Security Manager</a></li><li><a href="/jndi-resources-howto.html">9) JNDI Resources</a></li><li><a href="/jndi-datasource-examples-howto.html">10) JDBC DataSources</a></li><li><a href="/class-loader-howto.html">11) Classloading</a></li><li><a href="/jasper-howto.html">12) JSPs</a></li><li><a href="/ssl-howto.html">13) SSL/TLS</a></li><li><a href="/ssi-howto.html">14) SSI</a></li><li><a href="/cgi-howto.html">15) CGI</a></li><li><a href="/proxy-howto.html">16) Proxy Support</a></li><li><a href="/mbeans-descriptors-howto.html">17) MBeans Descriptors</a></li><li><a href="/default-servlet.html">18) Default Servlet</a></li><li><a href="/cluster-howto.html">19) Clustering</a></li><li><a href="/balancer-howto.html">20) Load Balancer</a></li><li><a href="/connectors.html">21) Connectors</a></li><li><a href="/monitoring.html">22) Monitoring and Management</a></li><li><a href="/logging.html">23) Logging</a></li><li><a href="/apr.html">24) APR/Native</a></li><li><a href="/virtual-hosting-howto.html">25) Virtual Hosting</a></li><li><a href="/aio.html">26) Advanced IO</a></li><li><a href="/extras.html">27) Additional Components</a></li><li><a href="/maven-jars.html">28) Mavenized</a></li><li><a href="/security-howto.html">29) Security Considerations</a></li><li><a href="/windows-service-howto.html">30) Windows Service</a></li><li><a href="/windows-auth-howto.html">31) Windows Authentication</a></li><li><a href="/jdbc-pool.html">32) Tomcat's JDBC Pool</a></li><li><a href="/web-socket-howto.html">33) WebSocket</a></li><li><a href="/rewrite.html">34) Rewrite</a></li></ul></div><div><h2>Reference</h2><ul><li><a href="/RELEASE-NOTES.txt">Release Notes</a></li><li><a href="/config/index.html">Configuration</a></li><li><a href="/api/index.html">Tomcat Javadocs</a></li><li><a href="/servletapi/index.html">Servlet Javadocs</a></li><li><a href="/jspapi/index.html">JSP 2.3 Javadocs</a></li><li><a href="/elapi/index.html">EL 3.0 Javadocs</a></li><li><a href="/websocketapi/index.html">WebSocket 1.1 Javadocs</a></li><li><a href="http://tomcat.apache.org/connectors-doc/">JK 1.2 Documentation</a></li></ul></div><div><h2>Apache Tomcat Development</h2><ul><li><a href="/building.html">Building</a></li><li><a href="/changelog.html">Changelog</a></li><li><a href="http://wiki.apache.org/tomcat/TomcatVersions">Status</a></li><li><a href="/developers.html">Developers</a></li><li><a href="/architecture/index.html">Architecture</a></li><li><a href="/funcspecs/index.html">Functional Specs.</a></li><li><a href="/tribes/introduction.html">Tribes</a></li></ul></div></nav></div></div><div id="mainRight"><div id="content"><h2>Tomcat Web Application Deployment</h2><h3 id="Table_of_Contents">Table of Contents</h3><div class="text">
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<ul><li><a href="#Introduction">Introduction</a></li><li><a href="#Installation">Installation</a></li><li><a href="#A_word_on_Contexts">A word on Contexts</a></li><li><a href="#Deployment_on_Tomcat_startup">Deployment on Tomcat startup</a></li><li><a href="#Deploying_on_a_running_Tomcat_server">Deploying on a running Tomcat server</a></li><li><a href="#Deploying_using_the_Tomcat_Manager">Deploying using the Tomcat Manager</a></li><li><a href="#Deploying_using_the_Client_Deployer_Package">Deploying using the Client Deployer Package</a></li></ul>
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</div><h3 id="Introduction">Introduction</h3><div class="text">
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<p>
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Deployment is the term used for the process of installing a web
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application (either a 3rd party WAR or your own custom web application)
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into the Tomcat server.
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</p>
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<p>
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Web application deployment may be accomplished in a number of ways
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within the Tomcat server.
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</p>
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<ul>
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<li>Statically; the web application is setup before Tomcat is started</li>
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<li>
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Dynamically; by directly manipulating already deployed web
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applications (relying on <em>auto-deployment</em>
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feature) or remotely by using the Tomcat Manager web
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application
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</li>
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</ul>
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<p>
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The <a href="/manager-howto.html">Tomcat Manager</a> is a web
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application that can be used interactively (via HTML GUI) or
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programmatically (via URL-based API) to deploy and manage web
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applications.
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</p>
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<p>
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There are a number of ways to perform deployment that rely on
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the Manager web application. Apache Tomcat provides tasks
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for Apache Ant build tool.
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<a href="http://tomcat.apache.org/maven-plugin.html">Apache Tomcat Maven Plugin</a>
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project provides integration with Apache Maven.
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There is also a tool called the Client Deployer, which can be
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used from a command line and provides additional functionality
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such as compiling and validating web applications as well as
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packaging web application into web application resource (WAR)
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files.
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</p>
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</div><h3 id="Installation">Installation</h3><div class="text">
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<p>
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There is no installation required for static deployment of web
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applications as this is provided out of the box by Tomcat. Nor is any
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installation required for deployment functions with the Tomcat Manager,
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although some configuration is required as detailed in the
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<a href="/manager-howto.html">Tomcat Manager manual</a>.
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An installation is however required if you wish
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to use the Tomcat Client Deployer (TCD).
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</p>
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<p>
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The TCD is not packaged with the Tomcat core
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distribution, and must therefore be downloaded separately from
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the Downloads area. The download is usually labelled
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<i>apache-tomcat-8.5.x-deployer</i>.
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</p>
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<p>
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TCD has prerequisites of Apache Ant 1.6.2+ and a Java installation.
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Your environment should define an ANT_HOME environment value pointing to
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the root of your Ant installation, and a JAVA_HOME value pointing to
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your Java installation. Additionally, you should ensure Ant's ant
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command, and the Java javac compiler command run from the command shell
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that your operating system provides.
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</p>
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<ol>
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<li>Download the TCD distribution</li>
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<li>
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The TCD package need not be extracted into any existing Tomcat
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installation, it can be extracted to any location.
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</li>
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<li>Read Using the <a href="#Deploying_using_the_Client_Deployer_Package">
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Tomcat Client Deployer</a></li>
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</ol>
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</div><h3 id="A_word_on_Contexts">A word on Contexts</h3><div class="text">
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<p>
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In talking about deployment of web applications, the concept of a
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<i>Context</i> is required to be understood. A Context is what Tomcat
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calls a web application.
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</p>
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<p>
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In order to configure a Context within Tomcat a <i>Context Descriptor</i>
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is required. A Context Descriptor is simply an XML file that contains
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Tomcat related configuration for a Context, e.g naming resources or
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session manager configuration. In earlier versions of
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Tomcat the content of a Context Descriptor configuration was often stored within
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Tomcat's primary configuration file <i>server.xml</i> but this is now
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discouraged (although it currently still works).
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</p>
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<p>
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Context Descriptors not only help Tomcat to know how to configure
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Contexts but other tools such as the Tomcat Manager and TCD often use
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these Context Descriptors to perform their roles properly.
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</p>
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<p>
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The locations for Context Descriptors are:
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</p>
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<ol>
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<li>$CATALINA_BASE/conf/[enginename]/[hostname]/[webappname].xml</li>
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<li>$CATALINA_BASE/webapps/[webappname]/META-INF/context.xml</li>
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</ol>
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<p>
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Files in (1) are named [webappname].xml but files in (2) are named
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context.xml. If a Context Descriptor is not provided for a Context,
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Tomcat configures the Context using default values.
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</p>
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</div><h3 id="Deployment_on_Tomcat_startup">Deployment on Tomcat startup</h3><div class="text">
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<p>
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If you are not interested in using the Tomcat Manager, or TCD,
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then you'll need to deploy your web applications
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statically to Tomcat, followed by a Tomcat startup. The location you
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deploy web applications to for this type of deployment is called the
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<code>appBase</code> which is specified per Host. You either copy a
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so-called <i>exploded web application</i>, i.e non-compressed, to this
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location, or a compressed web application resource .WAR file.
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</p>
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<p>
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The web applications present in the location specified by the Host's
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(default Host is "localhost") <code>appBase</code> attribute (default
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appBase is "$CATALINA_BASE/webapps") will be deployed on Tomcat startup
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only if the Host's <code>deployOnStartup</code> attribute is "true".
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</p>
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<p>
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The following deployment sequence will occur on Tomcat startup in that
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case:
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</p>
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<ol>
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<li>Any Context Descriptors will be deployed first.</li>
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<li>
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Exploded web applications not referenced by any Context
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Descriptor will then be deployed. If they have an associated
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.WAR file in the appBase and it is newer than the exploded web application,
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the exploded directory will be removed and the webapp will be
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redeployed from the .WAR
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</li>
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<li>.WAR files will be deployed</li>
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</ol>
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</div><h3 id="Deploying_on_a_running_Tomcat_server">Deploying on a running Tomcat server</h3><div class="text">
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||
<p>
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It is possible to deploy web applications to a running Tomcat server.
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</p>
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<p>
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If the Host <code>autoDeploy</code> attribute is "true", the Host will
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attempt to deploy and update web applications dynamically, as needed,
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for example if a new .WAR is dropped into the <code>appBase</code>.
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For this to work, the Host needs to have background processing
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enabled which is the default configuration.
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</p>
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<p>
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<code>autoDeploy</code> set to "true" and a running Tomcat allows for:
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</p>
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<ul>
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<li>Deployment of .WAR files copied into the Host <code>appBase</code>.</li>
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<li>
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Deployment of exploded web applications which are
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copied into the Host <code>appBase</code>.
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</li>
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<li>
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Re-deployment of a web application which has already been deployed from
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a .WAR when the new .WAR is provided. In this case the exploded
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web application is removed, and the .WAR is expanded again.
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Note that the explosion will not occur if the Host is configured
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so that .WARs are not exploded with a <code>unpackWARs</code>
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attribute set to "false", in which case the web application
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will be simply redeployed as a compressed archive.
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</li>
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<li>
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Re-loading of a web application if the /WEB-INF/web.xml file (or
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any other resource defined as a WatchedResource) is updated.
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</li>
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<li>
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Re-deployment of a web application if the Context Descriptor
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file from which the web application has been deployed is
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updated.
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</li>
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<li>
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Re-deployment of dependent web applications if the global or
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per-host Context Descriptor file used by the web application is
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updated.
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</li>
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<li>
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Re-deployment of a web application if a Context Descriptor file (with a
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filename corresponding to the Context path of the previously deployed
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web application) is added to the
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<code>$CATALINA_BASE/conf/[enginename]/[hostname]/</code>
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directory.
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</li>
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<li>
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Undeployment of a web application if its document base (docBase)
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is deleted. Note that on Windows, this assumes that anti-locking
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features (see Context configuration) are enabled, otherwise it is not
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possible to delete the resources of a running web application.
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</li>
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</ul>
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<p>
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Note that web application reloading can also be configured in the loader, in which
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case loaded classes will be tracked for changes.
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</p>
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</div><h3 id="Deploying_using_the_Tomcat_Manager">Deploying using the Tomcat Manager</h3><div class="text">
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||
<p>
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The Tomcat Manager is covered in its <a href="/manager-howto.html">own manual page</a>.
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||
</p>
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||
</div><h3 id="Deploying_using_the_Client_Deployer_Package">Deploying using the Client Deployer Package</h3><div class="text">
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<p>
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Finally, deployment of web application may be achieved using the
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Tomcat Client Deployer. This is a package which can be used to
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validate, compile, compress to .WAR, and deploy web applications to
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production or development Tomcat servers. It should be noted that this feature
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||
uses the Tomcat Manager and as such the target Tomcat server should be
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||
running.
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||
</p>
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<p>
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It is assumed the user will be familiar with Apache Ant for using the TCD.
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Apache Ant is a scripted build tool. The TCD comes pre-packaged with a
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build script to use. Only a modest understanding of Apache Ant is
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||
required (installation as listed earlier in this page, and familiarity
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||
with using the operating system command shell and configuring
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environment variables).
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||
</p>
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<p>
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The TCD includes Ant tasks, the Jasper page compiler for JSP compilation
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||
before deployment, as well as a task which
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validates the web application Context Descriptor. The validator task (class
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<code>org.apache.catalina.ant.ValidatorTask</code>) allows only one parameter:
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the base path of an exploded web application.
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||
</p>
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||
<p>
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||
The TCD uses an exploded web application as input (see the list of the
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properties used below). A web application that is programmatically
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deployed with the deployer may include a Context Descriptor in
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<code>/META-INF/context.xml</code>.
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</p>
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||
<p>
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The TCD includes a ready-to-use Ant script, with the following targets:
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</p>
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<ul>
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<li>
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<code>compile</code> (default): Compile and validate the web
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||
application. This can be used standalone, and does not need a running
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||
Tomcat server. The compiled application will only run on the associated
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||
<em>Tomcat X.Y.Z</em> server release, and is not guaranteed to work
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||
on another Tomcat release, as the code generated by Jasper depends on its runtime
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||
component. It should also be noted that this target will also compile
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||
automatically any Java source file located in the
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<code>/WEB-INF/classes</code> folder of the web application.</li>
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||
<li>
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||
<code>deploy</code>: Deploy a web application (compiled or not) to
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a Tomcat server.
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||
</li>
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||
<li><code>undeploy</code>: Undeploy a web application</li>
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||
<li><code>start</code>: Start web application</li>
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||
<li><code>reload</code>: Reload web application</li>
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||
<li><code>stop</code>: Stop web application</li>
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||
</ul>
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||
<p>
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||
In order for the deployment to be configured, create a file
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||
called <code>deployer.properties</code> in the TCD installation
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||
directory root. In this file, add the following name=value pairs per
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||
line:
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||
</p>
|
||
<p>
|
||
Additionally, you will need to ensure that a user has been
|
||
setup for the target Tomcat Manager (which TCD uses) otherwise the TCD
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||
will not authenticate with the Tomcat Manager and the deployment will
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||
fail. To do this, see the Tomcat Manager page.
|
||
</p>
|
||
<ul>
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||
<li>
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<code>build</code>: The build folder used will be, by default,
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<code>${build}/webapp/${path}</code> (<code>${build}</code>, by
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default, points to <code>${basedir}/build</code>). After the end
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||
of the execution of the <code>compile</code> target, the web
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||
application .WAR will be located at
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<code>${build}/webapp/${path}.war</code>.
|
||
</li>
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||
<li>
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<code>webapp</code>: The directory containing the exploded web application
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||
which will be compiled and validated. By default, the folder is
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||
<code>myapp</code>.
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||
</li>
|
||
<li>
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<code>path</code>: Deployed context path of the web application,
|
||
by default <code>/myapp</code>.
|
||
</li>
|
||
<li>
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||
<code>url</code>: Absolute URL to the Tomcat Manager web application of a
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running Tomcat server, which will be used to deploy and undeploy the
|
||
web application. By default, the deployer will attempt to access
|
||
a Tomcat instance running on localhost, at
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||
<code>http://localhost:8080/manager/text</code>.
|
||
</li>
|
||
<li>
|
||
<code>username</code>: Tomcat Manager username (user should have a role of
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manager-script)
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||
</li>
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||
<li><code>password</code>: Tomcat Manager password.</li>
|
||
</ul>
|
||
</div><div class="noprint"><h3 id="comments_section">
|
||
Comments
|
||
</h3><div class="text"><p class="notice"><strong>Notice: </strong>This comments section collects your suggestions
|
||
on improving documentation for Apache Tomcat.<br/><br/>
|
||
If you have trouble and need help, read
|
||
<a href="http://tomcat.apache.org/findhelp.html">Find Help</a> page
|
||
and ask your question on the tomcat-users
|
||
<a href="http://tomcat.apache.org/lists.html">mailing list</a>.
|
||
Do not ask such questions here. This is not a Q&A section.<br/><br/>
|
||
The Apache Comments System is explained <a href="/comments.html">here</a>.
|
||
Comments may be removed by our moderators if they are either
|
||
implemented or considered invalid/off-topic.
|
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</p><div id="comments_thread"></div></div></div></div></div></div></div><footer><div id="footer">
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Copyright © 1999-2018, The Apache Software Foundation
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</div></footer></div></body></html> |