This script was heuristically using short sleep commands in order to
give udev activity time to complete.
There's a command "udevadm settle" which actually looks at the udev
queue and waits until its processing is done. Much, much better.
This rearranges the get_id function a bit too, breaking it into one
function that gets the id and another that loops back and tries
again after a short delay in the event the get_id fails.
Signed-off-by: Alex Elder <elder@inktank.com>
This adds a bash script that creates an rbd image, then repeatedly
maps and unmaps it for a specified duration (5 minutes by default).
Signed-off-by: Alex Elder <elder@inktank.com>