Unicorn Install Script with RVM -- which executable? - ruby-on-rails

Question

I am trying to get an init script running for unicorn (on Ubuntu) with unicorn installed as a gem:
/home/tim/.rvm/gems/ruby-1.9.2-p180#polco/bin/unicorn
My init script is:
#! /bin/sh
### BEGIN INIT INFO
# Provides: unicorn
# Required-Start: $local_fs $remote_fs $network $syslog
# Required-Stop: $local_fs $remote_fs $network $syslog
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: starts the unicorn web server
# Description: starts unicorn
### END INIT INFO
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
DAEMON=/home/tim/.rvm/gems/ruby-1.9.2-p180#polco/bin/unicorn
DAEMON_OPTS="-c /home/deployer/shop/current/unicorn.rb -E production -D"
NAME=unicorn_rails
DESC=unicorn_rails
PID=/home/deployer/shop/shared/pids/unicorn.pid
case "$1" in
start)
echo -n "Starting $DESC: "
$DAEMON $DAEMON_OPTS
echo "$NAME."
;;
stop)
echo -n "Stopping $DESC: "
kill -QUIT `cat $PID`
echo "$NAME."
;;
restart)
echo -n "Restarting $DESC: "
kill -QUIT `cat $PID`
sleep 1
$DAEMON $DAEMON_OPTS
echo "$NAME."
;;
reload)
echo -n "Reloading $DESC configuration: "
kill -HUP `cat $PID`
echo "$NAME."
;;
*)
echo "Usage: $NAME {start|stop|restart|reload}" >&2
exit 1
;;
esac
exit 0
The whole operation seems fragile to me with the rvm executable. Does rvm have something like $CURRENT_RVM_PATH?

Answer 1

O.k. i solved this for me. I stopped caring if I was root or not and decided to run this as, ironically, the user 'passenger' and I needed to run unicorn_rails.
here is my startup script:
#! /bin/sh
### BEGIN INIT INFO
# Provides: unicorn
# Required-Start: $local_fs $remote_fs $network $syslog
# Required-Stop: $local_fs $remote_fs $network $syslog
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: starts the unicorn web server
# Description: starts unicorn
### END INIT INFO
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
#DAEMON=/home/tim/.rvm/gems/ruby-1.9.2-p180#polco/bin/unicorn
DAEMON=/home/passenger/.rvm/gems/ruby-1.9.2-p180/bin/unicorn_rails
DAEMON_OPTS="-c /home/passenger/polco/current/config/unicorn_tacitus.rb -E production -D"
NAME=unicorn_rails
DESC=unicorn_rails
PID=/home/passenger/polco/shared/pids/unicorn.pid
case "$1" in
start)
echo -n "Starting $DESC: "
$DAEMON $DAEMON_OPTS
echo "$NAME."
;;
stop)
echo -n "Stopping $DESC: "
kill -QUIT `cat $PID`
echo "$NAME."
;;
restart)
echo -n "Restarting $DESC: "
kill -QUIT `cat $PID`
sleep 1
$DAEMON $DAEMON_OPTS
echo "$NAME."
;;
reload)
echo -n "Reloading $DESC configuration: "
kill -HUP `cat $PID`
echo "$NAME."
;;
*)
echo "Usage: $NAME {start|stop|restart|reload}" >&2
exit 1
;;
esac
exit 0
To execute this -- I now have the simple capistrano task:
desc "restart unicorn"
task :restart, :roles => :app, :except => { :no_release => true } do
run "#{current_path}/unicorn_exec restart"
end
after "deploy:restart","unicorn:restart"
The last question I is why I have to restart unicorn_rails. I thought I could reload via: kill -HUP cat $PID, but everything only works if I restart.

Answer 2

Since google might find this question for other people, here is my unicorn restart script I'm using on 3 different servers. I just need to add USR2 The repo is called eunic and i may hack on this later.
All that to say, here is another way to do it.