Control Many instances with Upstart

gistfile1.txt

======================
description "Controls multiple instances of the grunt-one-execer job"
start on runlevel [23]
task

pre-start script
  transport_mem_kb=1572864
  mem_kb=$(cat /proc/meminfo | head -1 | awk '{print $2}')
  shippers=$(($mem_kb/$transport_mem_kb))
  # start the number of shippers we have memory for
  for i in `seq 1 $shippers`;
  do
    start grunt-one-execer N=$i
  done
end script

post-stop script
  transport_mem_kb=1572864
  mem_kb=$(cat /proc/meminfo | head -1 | awk '{print $2}')
  shippers=$(($mem_kb/$transport_mem_kb))
  for i in `seq 1 $shippers`;
  do
    stop grunt-one-execer N=$i || /bin/true
  done
end script

====================
# Starts a single instance-based execer.  This job is controlled by
# grunt-many-execer
description "one execer grunt"
instance $N
respawn
setuid myuser

env APP_ROOT=/opt/apps/grunt
exec ${APP_ROOT}/bin/grunt -prod \
        -type execer \
        -execer-rackspace-credentials ${APP_ROOT}/conf/execer-rackspace.json