Author: Bhuvan Arumugam <email address hidden>
Date: Mon Apr 2 12:54:19 2012 -0700
Monitor ready node count for all providers.
New script to print count of available nodes, across all providers.
The threshold is specified in command line. If available node count
is less than threshold, the script exit with error code (1).
The available node count is written to a file. File name is
specified in command line. If file name is not specified, it is
written to ~/vm-threshold.txt file.
usage: devstack-vm-threshold.py [-h] -t threshold [-f stat-file]