Base class for all storage backends
- class glance_store.driver.Store(conf, backend=None)¶
- MULTI_BACKEND_OPTIONS = [<oslo_config.cfg.StrOpt object>]¶
- OPTIONS = None¶
- READ_CHUNKSIZE = 4194304¶
- WRITE_CHUNKSIZE = 4194304¶
- add(*args, **kwargs)¶
Configure the store to use the stored configuration options and initialize capabilities based on current configuration.
Any store that needs special configuration should implement this method.
This is like configure except that it’s specifically for configuring the store to accept objects.
If the store was not able to successfully configure itself, it should raise exceptions.BadStoreConfiguration.
- delete(*args, **kwargs)¶
- get(*args, **kwargs)¶
Returns a tuple of schemes which this store can handle.
- get_size(location, context=None)¶
Takes a glance_store.location.Location object that indicates where to find the image file, and returns the size
location – glance_store.location.Location object, supplied from glance_store.location.get_location_from_uri()
glance_store.exceptions.NotFound if image does not exist
Returns the store location class that is used by this store.
- set_acls(location, public=False, read_tenants=None, write_tenants=None, context=None)¶
Sets the read and write access control list for an image in the backend store.
public – A boolean indicating whether the image should be public.
read_tenants – A list of tenant strings which should be granted read access for an image.
write_tenants – A list of tenant strings which should be granted write access for an image.
- property url_prefix¶
Provides backward compatibility for the 0.26.0+ Store.add() function. In 0.26.0, the ‘hashing_algo’ parameter is introduced and Store.add() returns a 5-tuple containing a computed ‘multihash’ value.
This wrapper behaves as follows:
If no hashing_algo identifier is supplied as an argument, the response is the pre-0.26.0 4-tuple of:
(backend_url, bytes_written, checksum, metadata_dict)
If a hashing_algo is supplied, the response is a 5-tuple:
(backend_url, bytes_written, checksum, multihash, metadata_dict)
The wrapper detects the presence of a ‘hashing_algo’ argument both by examining named arguments and positionally.