Control several workers from the same master upstart script

some-worker.conf

description "Some Ruby Worker"

kill timeout 10

respawn

instance $INSTANCE

script
  app=/var/deploy/myapp/production/current
  pid="$app/tmp/pids/worker-$INSTANCE.pid"
  exec start-stop-daemon -S -p $pid -u deploy -g deploy -d $app --exec /usr/bin/env -- APP_ENV=production rake worker:do_something 2>&1
end script

workers-master.conf

description "Master Worker Init Script"

start on runlevel [2345]
stop on runlevel [06]

pre-start script

    for n in $(seq 1 5)
    do
      /sbin/start some-worker INSTANCE=$n
    done
end script

post-stop script
    for n in `initctl list|grep "^some-worker "|awk '{print $2}'|tr -d ')'|tr -d '('`
    do
     /sbin/stop some-worker INSTANCE=$n
    done
end script