parser.add_argument('-b',
'--bypass-scheduler',
action='store_true',
help='Bypass scheduler and sync/vote immediately',
dest='bypass')
args = parser.parse_args()
return args
if __name__ == '__main__':
atexit.register(cleanup)
signal.signal(signal.SIGINT, signal_handler)
# ensure another instance of Sentinel is not currently running
mutex_key = 'SENTINEL_RUNNING'
# assume that all processes expire after 'timeout_seconds' seconds
timeout_seconds = 90
is_running = Transient.get(mutex_key)
if is_running:
printdbg("An instance of Sentinel is already running -- aborting.")
sys.exit(1)
else:
Transient.set(mutex_key, misc.now(), timeout_seconds)
# locked to this instance -- perform main logic here
main()
Transient.delete(mutex_key)
def signal_handler(signum, frame):
print("Got a signal [%d], cleaning up..." % (signum))
Transient.delete('SENTINEL_RUNNING')
sys.exit(1)
def cleanup():
Transient.delete(mutex_key)
def clear_schedule(self):
Transient.delete(self.transient_key_scheduled)
