Plasticx Blog

On a Gentoo system make a directory /etc/rv2 and any files in that directory will trigger the rv2 init.d script to attempt to start a corresponding camping app.

for hurl it the file is /etc/rv2/hurl_rv2.conf and it contains something like:

sample my-app-rv2.conf

CAMPING_ENV=production

RV2_APP_DIR=/path/to/app/hurl

PORT=1999

ADDRESS=127.0.0.1

The rv2 init.d script expects RV2_APP_DIR to specify the application directory, PORT to specify the port that the Mongrel harness will listen to, and ADDRESS the machine address that Mongrel will bind to. See the source code for the Hurl Campling app to see how Hurl makes use of a ENV variable CAMPING_ENV to help in configuration for testing and production.

I’m running Hurl as Mongrel behind an Apache Proxy, more details about that can by found in my Maintaining Your Own Typo 4.0.3 which is nice guide for rolling your own Rails stack.

Here is the rv2_harness.rb that resides in /path/to/app/hurl. Every Camping app that uses RV2 will need to have a harness named rv2_harness.rb in its application directory

sample rv2_harness.rb @ /path/to/app/hurl/rv2_harness.rb

# Example mongrel harness for camping apps with rv2
# based on Evan Weaver's original rv implementation:
# http://blog.evanweaver.com/articles/2006/12/19/rv-a-tool-for-luxurious-camping
#
# author: Mike Mondragon
# url: http://plasti.cx/
# license: AFL 3.0# Example mongrel harness for camping apps with rv2

# based on Evan Weaver’s original rv implementation:

# http://blog.evanweaver.com/articles/2006/12/19/rv-a-tool-for-luxurious-camping

#

# author: Mike Mondragon

# url: http://plasti.cx/

# license: AFL 3.0

# from the command line:

# ruby rv_harness2.rb PORT ADDRESS
require ‘rubygems’

require ‘mongrel’

require ‘mongrel/camping’

$LOAD_PATH.unshift File.dirname(FILE)
ENV[‘CAMPING_ENV’] ||= ‘production’
LOGFILE = "#{File.dirname(FILE)}/mongrel.log"

PIDFILE = "#{File.dirname(FILE)}/mongrel.pid"
# or whatever else you want passed in

PORT = ARGV[0].to_i

ADDR = ARGV[1]
# this is your camping app

require ‘hurl’

app = Hurl
if ENV[‘CAMPING_ENV’].eql?(‘production’)

  app::Models::Base.establish_connection :adapter => ‘mysql’,

    :database => ‘hurl’,

    :host => ‘localhost’,

    :username => ‘root’,

    :password => ‘’

else

  app::Models::Base.establish_connection :adapter => ‘sqlite3’,

   :database => ‘db/hurl.db’

end
app::Models::Base.logger = Logger.new(LOGFILE) # comment me out if you don’t want to log

app::Models::Base.threaded_connections=false

app.create
config = Mongrel::Configurator.new :host => ADDR, :pid_file => PIDFILE do

  listener :port => PORT do

    uri ‘/’, :handler => Mongrel::Camping::CampingHandler.new(app)

    # use the mongrel static server in production instead of the camping controller

    uri ‘/static/’, :handler => Mongrel::DirHandler.new("static/")

    uri ‘/favicon.ico’, :handler => Mongrel::Error404Handler.new(‘’)

    setup_signals

    run

    write_pid_file

    log "#{app} available at #{ADDR}:#{PORT}"

    join

  end

end

Below is the /etc/init.d/rv2 script. After you install it be sure to enable it for system startup and shut down:

rc-update add rv2 default

chown -R apache.apache /path/to/your/camping/app

/etc/init.d/rv2

#!/sbin/runscript

depend() {

        need net

        use mysql apache2

        after apache2

}

USER=apache

GROUP=apache

RV2_HARNESS=rv2_harness.rb

RV2_CONF_DIR=/etc/rv2
start() {

        ebegin “Starting Camping Apps in RV2”

        for apps in `ls -1 ${RV2_CONF_DIR}`

        do

	
the config needs to have CAMPING_ENV,
	
RV2_APP_DIR, PORT, and ADDRESS specified

                . ${RV2_CONF_DIR}/$apps

start-stop-daemon —start —quiet —background \
—chuid ${USER:-apache}:${GROUP:-apache} \
—exec /usr/bin/env ruby \
— $RV2_APP_DIR/${RV2_HARNESS} $PORT $ADDRESS 1>&2
res=$?

	
if one is broken do not continue

                if [ $res -ne 0 ]; then break; fi

        done

        eend ${res}

}

stop() {

        ebegin “Stopping Camping Apps in RV2”

        for apps in `ls -1 ${RV2_CONF_DIR}`

        do

                . ${RV2_CONF_DIR}/$apps

                start-stop-daemon —stop —pidfile $RV2_APP_DIR/mongrel.pid

                ret=$?

                rm -f $RV2_APP_DIR/mongrel.pid

	
force unloading of all apps

        done

        eend ${ret}

}

restart() {

        svc_stop

        svc_start

}

Enjoy!