def get_cached_image(context, instance):
base_disk_path = pathutils.base_disk_path(instance)
for disk_format in constants.ALL_DISK_FORMATS:
test_path = base_disk_path + '.' + disk_format.lower()
if os.path.exists(test_path):
return test_path
sync = utils.synchronized(base_disk_path)
synchronized_fetch_image = sync(_fetch_image)
disk_path = synchronized_fetch_image(context, instance, base_disk_path)
return disk_path
def get_cached_image(context, instance):
base_disk_path = pathutils.base_disk_path(instance)
for disk_format in constants.ALL_DISK_FORMATS:
test_path = base_disk_path + '.' + disk_format.lower()
if os.path.exists(test_path):
return test_path
sync = utils.synchronized(base_disk_path)
synchronized_fetch_image = sync(_fetch_image)
disk_path = synchronized_fetch_image(context, instance, base_disk_path)
return disk_path
def _lock_for_refresh(base_file):
lock_name = 'refresh-%s' % os.path.split(base_file)[-1]
return utils.synchronized(lock_name, external=True,
lock_path=_get_lock_path())