<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 TRANSITIONAL//EN"> <HTML> <HEAD> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; CHARSET=UTF-8"> <META NAME="GENERATOR" CONTENT="GtkHTML/3.28.3"> </HEAD> <BODY> On Fri, 2010-08-20 at 07:10 -0700, Kaushal Shriyan wrote: <BLOCKQUOTE TYPE=CITE> <PRE> Hi Can someone please guide me to setup two instances of apache2 along with start/stop init.d script for both the instances. Thanks Kaushal </PRE> </BLOCKQUOTE> The Phusion Passenger module (mod_rails) previously conflicted with mod_rewrite, so I used the following hack to create a separate Apache instance. Now that mod_rails and mod_rewrite play nicely, I no longer need this hack, but it worked on a production Hardy web server for a year. I use an 'includes' directory to store common configuration chunks imported on multiple virtual hosts (e.g specific authentication / authorization directives included within a <File> or <Location> block). <BLOCKQUOTE> The Ruby on Rails engine, Phusion Passenger (a.k.a. mod_rails) conflicts with the standard modules mod_alias and mod_rewrite. So I cloned the Apache configuration files and modules into a separate directory tree, and the system now runs two parallel daemons running on troy, using these configuration directories: /etc/apache2/ /etc/apache2_modrails/ Pretty much everything that was called 'apache2*' in the standard configuration (init.d scripts, /usr/sbin/ binaries) has a new copy or symlink to support the parallel configuration. I used symlinks (or variables set in configuration files) where possible, to avoid version drift when we patch the system. A global substitution of "s/apache2/apache2_modrails/g" mostly worked for the /etc/init.d/apache2_modrails script and the /usr/sbin/apache2_modrailsctl script, but I needed to update some default settings within each script. New directories: <BLOCKQUOTE> /etc/apache2_modrails/ /etc/apache2_modrails/conf.d/ /etc/apache2_modrails/includes/ /etc/apache2_modrails/mods-available/ /etc/apache2_modrails/mods-enabled/ /etc/apache2_modrails/sites-available/ /etc/apache2_modrails/sites-enabled/ /var/cache/apache2_modrails/mod_disk_cache/ /var/lock/apache2_modrails/ /var/run/apache2_modrails/ </BLOCKQUOTE> New files: <BLOCKQUOTE> /etc/apache2_modrails/apache2_modrails.conf /etc/default/apache2_modrails /etc/init.d/apache2_modrails /usr/sbin/apache2_modrailsctl /var/log/apache2/access-modrails_log /var/log/apache2/error-modrails_log /var/run/apache2_modrails.pid </BLOCKQUOTE> New symlinks: <BLOCKQUOTE> /usr/sbin/apache2_modrails -> /usr/sbin/apache2 /etc/rc0.d/K09apache2_modrails -> ../init.d/apache2_modrails /etc/rc1.d/K09apache2_modrails -> ../init.d/apache2_modrails /etc/rc2.d/S91apache2_modrails -> ../init.d/apache2_modrails /etc/rc3.d/S91apache2_modrails -> ../init.d/apache2_modrails /etc/rc4.d/S91apache2_modrails -> ../init.d/apache2_modrails /etc/rc5.d/S91apache2_modrails -> ../init.d/apache2_modrails /etc/rc6.d/K09apache2_modrails -> ../init.d/apache2_modrails </BLOCKQUOTE> Configuration cloning hack, copy / symlink the files into the new skeleton directory tree. <BLOCKQUOTE> cp -p /etc/apache2/* /etc/apache2_modrails/ </BLOCKQUOTE> First option avoids breakage if modules change path names in the standard location, since the configuration files under this hack won't be updated by dpkg. <BLOCKQUOTE> ln -s /etc/apache2/mods-available/* /etc/apache2_modrails/mods-available/ </BLOCKQUOTE> Less fragile option - share the modules-available between the instances <BLOCKQUOTE> rmdir /etc/apache2_modrails/mods-available ln -s /etc/apache2/mods-available /etc/apache2_modrails/ </BLOCKQUOTE> Add a localhost binding port for mod_rails Apache status in ports.conf and /etc/default/apache2_modrails (the apache2ctl and apache2_modrailsctl scripts call the lynx command line browser to dump output from the status port). Apache status binding in /etc/apache2_modrails/ports.conf : <BLOCKQUOTE> Listen localhost:81 </BLOCKQUOTE> Changes in /etc/default/apache2_modrails <BLOCKQUOTE> APACHE_HTTPD=/usr/sbin/apache2_modrails APACHE_STATUSURL=<A HREF="http://localhost:81/server-status">http://localhost:81/server-status</A> HTCACHECLEAN_PATH=/var/cache/apache2_modrails/mod_disk_cache </BLOCKQUOTE> </BLOCKQUOTE> </BODY> </HTML>