glance_store.multi_backend module¶

glance_store.multi_backend.add(conf, image_id, data, size, backend, context=None, verifier=None)¶

glance_store.multi_backend.add_with_multihash(conf, image_id, data, size, backend, hashing_algo, scheme=None, context=None, verifier=None)¶

glance_store.multi_backend.check_location_metadata(val, key='')¶

glance_store.multi_backend.create_multi_stores(conf=<oslo_config.cfg.ConfigOpts object>)¶

Registers all store modules and all schemes from the given config.

glance_store.multi_backend.delete(uri, backend, context=None)¶

Removes chunks of data from backend specified by uri.

glance_store.multi_backend.get(uri, backend, offset=0, chunk_size=None, context=None)¶

Yields chunks of data from backend specified by uri.

glance_store.multi_backend.get_known_schemes_for_multi_store()¶

Returns list of known schemes.

glance_store.multi_backend.get_size_from_uri_and_backend(uri, backend, context=None)¶

Retrieves image size from backend specified by uri.

glance_store.multi_backend.get_store_from_store_identifier(store_identifier)¶

Determine backing store from identifier.

Given a store identifier, return the appropriate store object for handling that scheme.

glance_store.multi_backend.register_store_opts(conf)¶

glance_store.multi_backend.set_acls_for_multi_store(location_uri, backend, public=False, read_tenants=[], write_tenants=None, context=None)¶

glance_store.multi_backend.store_add_to_backend(image_id, data, size, store, context=None, verifier=None)¶

A wrapper around a call to each stores add() method.

This gives glance a common place to check the output.

Parameters:	image_id – The image add to which data is added data – The data to be stored size – The length of the data in bytes store – The store to which the data is being added context – The request context verifier – An object used to verify signatures for images backend – Name of the backend to store the image
Returns:	The url location of the file, the size amount of data, the checksum of the data the storage systems metadata dictionary for the location

glance_store.multi_backend.store_add_to_backend_with_multihash(image_id, data, size, hashing_algo, store, context=None, verifier=None)¶

A wrapper around a call to each store’s add() method that requires a hashing_algo identifier and returns a 5-tuple including the “multihash” computed using the specified hashing_algo. (This is an enhanced version of store_add_to_backend(), which is left as-is for backward compatibility.)

Parameters:	image_id – The image add to which data is added data – The data to be stored size – The length of the data in bytes store – The store to which the data is being added hashing_algo – A hashlib algorithm identifier (string) context – The request context verifier – An object used to verify signatures for images
Returns:	The url location of the file, the size amount of data, the checksum of the data, the multihash of the data, the storage system’s metadata dictionary for the location
Raises:	glance_store.exceptions.BackendException glance_store.exceptions.UnknownHashingAlgo

glance_store.multi_backend.verify_store()¶