sleep in upstart script (upstart synchronism)

Yes, somehow, sleep doesn't work for me either (I'm using Ubuntu 10.04). I'm not sure that the following solution is the best one but it seems to be working.

1. Create an additional upstart task, say, post-sleep.conf (logging added for clarity):

   description "Sleep when the job finishes"
   
   task
   
   script
       echo "Sleeping..." | logger -t "post-sleep-job"
       /bin/sleep 60s
       echo "Done sleeping" | logger -t "post-sleep-job"
   end script
   

2. Add the following to the job that needs to sleep after shutdown:

   post-stop script
       start post-sleep
   end script
   

Use instances in the first script if several jobs need to wait before full shutdown. However, I think an even better and more robust solution would be to rely on events.