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  *     Purpose: web page describing the installation of Metacat
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  *   Copyright: 2008 Regents of the University of California and the
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  *               National Center for Ecological Analysis and Synthesis
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  *     Authors: Chad Berkley
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  *
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  *    '$Author: daigle $'
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  *    '$Date: 2008-11-24 11:57:40 -0800 (Mon, 24 Nov 2008) $'
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  *    '$Revision: 4621 $'
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<!DOCTYPE html PUBLIC "-//W3C//DTD html 4.0//EN">
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  <title>Metacat Apache Configuration</title>
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<table class="tabledefault" width="100%">
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<tr><td rowspan="2"><img src="./images/KNBLogo.gif"></td>
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<td colspan="7">
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<div class="title">Metacat Apache Configuration</div>
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<div class="header1">Table of Contents</div>
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  <div class="toc">
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    <div class="toc1"><a href="#Intro">Introduction</a></div>
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    <div class="toc1"><a href="#UbuntuConfig">Unbuntu/Debian Configuration</a></div>
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      <div class="toc2"><a href="#ModJK">Set Up Mod JK</a></div>
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      <div class="toc2"><a href="#SetUpKnb">Set Up Metacat Site</a></div>
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      <div class="toc2"><a href="#LsidConfig">LSID Service Configuration</a></div>
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      <div class="toc2"><a href="#UbuntuReloadApache">Reload Apache</a></div>
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    <div class="toc1"><a href="#OtherConfig">Other O/S Configuration</a></div>
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  </div> 
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<a name="Intro"></a><div class="header1">Introduction</div>
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  <p>If you are going to run Tomcat behind the Apache web server, you have some additional
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  setup to perform.  One of the reasons for recommending the Ubuntu Linux O/S is its 
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  ease of setup.  This becomes abundantly clear when configuring Apache.  We will
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  address Ubuntu/Debian configurations separately from all other configurations.</p>
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<a name="UbuntuConfig"></a><div class="header1">Unbuntu/Debian Configuration</div>  
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   <p>If you are installing on an Ubuntu/Debian system, and you installed Apache using 
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   apt-get, the Metacat code will have helper files that can be dropped into directories 
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   to configure Apache.  Depending on whether you are installing from binary distribution 
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   or source, these helper files will be in one of two locations:
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   <ul>
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   <li>Installing From Binary Distribution - the helper files will be located in the 
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   directory where you extracted the distribution.</li>
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   <li>Installing From Source - regardless if it's a source distribution or source that 
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   you checked out from the SVN repository, the helper files will be located in:
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     <div class="code">&lt;metacat_code_dir&gt;/src/scripts</div></li>
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   </ul>
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   <p>We will refer to the directory with the helper scripts as &lt;metacat_helper_dir&gt;</p>
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   <p>We will refer to the directory where Apache is installed as &lt;apache_install_dir&gt;</p>
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   <a name="ModJK"></a><div class="header2">Set Up Mod JK</div>
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	<p>Apache uses a module called Mod JK to talk to Tomcat applications.  If you haven't done so 
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	already, you can install it by typing:</p>	
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	  <div class="code">sudo apt-get install libapache2-mod-jk</div>
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	<p>The helper files that configure the interface between Apache and Tomcat are jk.conf and workers.properties.
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	To install these files:</p>
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      <div class="code">sudo cp &lt;metacat_helper_dir&gt;/jk.conf &lt;apache_install_dir&gt;/mods-available/</div>
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      <div class="code">sudo cp &lt;metacat_helper_dir&gt;/workers.properties &lt;apache_install_dir&gt;</div>
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    <p>Disabling and re-enabling the Apache Mod JK module will pick up the new changes:</p>
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      <div class="code">sudo a2dismod jk</div>
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      <div class="code">sudo a2enmod jk</div>
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   <a name="SetUpKnb"></a><div class="header2">Set Up Metacat Site</div>   
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    <p>Next, Apache needs to know about the Metacat site.  The helper file named "knb" has rules that
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    tell Apache which traffic to route to Metacat.  Set up the knb (Metacat) site by dropping the 
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    knb file into the sites-available directory and running the a2ensite to enable the site:</p>
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      <div class="code">sudo cp &lt;metacat_helper_dir&gt;/knb &lt;apache_install_dir&gt;/sites-available</div>
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      <div class="code">sudo a2ensite knb</div>
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    <a name="LsidConfig"></a><div class="header2">LSID Service Configuration</div>   
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    <p>If you want to run an optional LSID server along with the Metacat server, set up and enable the authority service site 
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      configurations by typing:</p>
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      <div class="code">sudo cp &lt;metacat_helper_dir&gt;/authority &lt;apache_install_dir&gt;/sites-available</div>
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      <div class="code">sudo a2ensite authority</div>
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    <a name="UbuntuReloadApache"></a><div class="header2">Reload Apache</div>
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    <p>Reload apache to bring in changes by typing:</p>
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      <div class="code">sudo /etc/init.d/apache2 force-reload</div>
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<a name="OtherConfig"></a><div class="header1">Other O/S Configuration</div>
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  <p>If you are running on an O/S other than Ubuntu/Debian or you installed the
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  Apache source or binary, you will need to manually edit the Apache configuration
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  file.</p> 
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  <p>We will refer to the directory where Apache is installed as &lt;apache_install_dir&gt;</p>
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  <p>Edit:</p>
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    <div class="code">&lt;apache_install_dir&gt;/conf/httpd.conf</div>
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  <a name="ModJkLog"></a><div class="header2">Mod JK Log Configuration</div>
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    <p> You should configure the log location and level for Mod JK.  If you do not
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    already have a section like this, you should add it.</p>  
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    <div class="code">
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    &lt;IfModule mod_jk.c&gt;<br>
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       &nbsp;&nbsp;JkLogFile "/var/log/tomcat/mod_jk.log"<br>
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       &nbsp;&nbsp;JkLogLevel info<br>
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    &lt;/IfModule&gt;
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    </div>
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    <p>You can set the log location to any place you like</p>
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  <a name="VirtualHost"></a><div class="header2">Virtual Host Configuration</div>  
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  <p>The following section configures apache to talk to route traffic to the Metacat
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  application.</p>
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    <div class="code">
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    &lt;VirtualHost XXX.XXX.XXX.XXX:80&gt;<br>
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      &nbsp;&nbsp;DocumentRoot /var/www<br>
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      &nbsp;&nbsp;ServerName dev.nceas.ucsb.edu<br>
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      &nbsp;&nbsp;ErrorLog /var/log/httpd/error_log<br>
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      &nbsp;&nbsp;CustomLog /var/log/httpd/access_log common<br>
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    <br>
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      &nbsp;&nbsp;ScriptAlias /cgi-bin/ "/var/www/cgi-knb/"<br>
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      &nbsp;&nbsp;&lt;Directory /var/www/cgi-knb/&gt;<br>
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        &nbsp;&nbsp;&nbsp;&nbsp;AllowOverride None<br>
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        &nbsp;&nbsp;&nbsp;&nbsp;Options ExecCGI<br>
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        &nbsp;&nbsp;&nbsp;&nbsp;Order allow,deny<br>
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        &nbsp;&nbsp;&nbsp;&nbsp;Allow from all<br>
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      &nbsp;&nbsp;&lt;/Directory&gt;<br>
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    <br>
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      &nbsp;&nbsp;ScriptAlias /knb/cgi-bin/ "/var/www/webapps/knb/cgi-bin/"<br>
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      &nbsp;&nbsp;&lt;Directory "/var/www/webapps/knb/cgi-bin/"&gt;<br>
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        &nbsp;&nbsp;&nbsp;&nbsp;AllowOverride None<br>
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        &nbsp;&nbsp;&nbsp;&nbsp;Options ExecCGI<br>
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        &nbsp;&nbsp;&nbsp;&nbsp;Order allow,deny<br>
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        &nbsp;&nbsp;&nbsp;&nbsp;Allow from all<br>
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      &nbsp;&nbsp;&lt;/Directory&gt;<br>
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    <br>
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      &nbsp;&nbsp;JkMount /knb ajp13<br>
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      &nbsp;&nbsp;JkMount /knb/* ajp13<br>
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      &nbsp;&nbsp;JkMount /knb/metacat ajp13<br>
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      &nbsp;&nbsp;JkUnMount /knb/cgi-bin/* ajp13<br>
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      &nbsp;&nbsp;JkMount /*.jsp ajp13<br>
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      &nbsp;&nbsp;JkMount /metacat ajp13<br>
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      &nbsp;&nbsp;JkMount /metacat/* ajp13<br>
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    &lt;/VirtualHost&gt;<br>
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    </div>
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    <p>Some notes:</p>
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    <ul>
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    <li>ServerName - should be set to the dns name where you will serve Metacat.</li>
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    <li> ScriptAlias /knb/cgi-bin/ - this directive and the following Directory section
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    should both point to the cgi-bin directory inside your Metacat installation.</li>
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    </ul>
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  <a name="WorkersProperties"></a><div class="header2">workers.properties file</div> 
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   <p>You will need to drop a file named "workers.proerpties" file into your Apache 
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   configuration directory, and edit the file to make sure all properties are correct.
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   Metacat provides a base workers.properties file for you to use.  Depending on 
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   whether you are installing from binary distribution or source, the workers.properties
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   files will be in one of two locations:
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   <ul>
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   <li>Installing From Binary Distribution - the file will be located in the 
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   directory where you extracted the distribution.</li>
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   <li>Installing From Source - regardless if it's a source distribution or source that 
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   you checked out from the SVN repository, the file will be located in:
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     <div class="code">&lt;metacat_code_dir&gt;/src/scripts/workers.properties</div></li>
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   </ul>   
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   <p>Copy the workers.properties file into:</p>
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     &lt;apache_install_dir&gt;/conf/
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   <p>Edit the workers.properties file and make sure the following properties are
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   set correctly:</p>
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   <ul>
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   <li>workers.tomcat_home - should be set to the Tomcat install directory on your system.</li>
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   <li>workers.java_home  - should be set to the Java install directory on your system.</li>
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   </ul> 
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  <a name="LsidConfig"></a><div class="header2">LSID Service Configuration</div>   
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    <p>If you want to run an optional LSID server along with the Metacat server, add the following lines to the
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    VirtualHost section you configured above:</p>
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      <div class="code">
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        &nbsp;&nbsp;JkMount /authority ajp13<br>
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        &nbsp;&nbsp;JkMount /authority/* ajp13<br>
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      </div>
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    <a name="UbuntuReloadApache"></a><div class="header2">Reload Apache</div>
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    <p>Restart apache to bring in changes by typing:</p>
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      <div class="code">sudo /etc/init.d/apache2 restart</div>
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