Shared Filesystems¶

The manila.share.manager Module¶

NAS share manager managers creating shares and access rights.

Related Flags

class ShareManager(share_driver=None, service_name=None, *args, **kwargs)

Bases: manila.manager.SchedulerDependentManager

Manages NAS storages.

RPC_API_VERSION = '1.12'

allow_access(*args, **kwargs)

Allow access to some share instance.

connection_get_info(*args, **kwargs)

create_cgsnapshot(*args, **kwargs)

create_consistency_group(*args, **kwargs)

create_replicated_snapshot(*args, **kwargs)

create_share_instance(*args, **kwargs)

Creates a share instance.

create_share_replica(*args, **kwargs)

create_share_server(context, share_server_id)

Invoked to create a share server in this backend.

This method is invoked to create the share server defined in the model obtained by the supplied id.

Parameters:	context – The ‘context.RequestContext’ object for the request. share_server_id – The id of the server to be created.

create_snapshot(*args, **kwargs)

Create snapshot for share.

delete_cgsnapshot(*args, **kwargs)

delete_consistency_group(*args, **kwargs)

delete_free_share_servers(*args, **kwargs)

delete_replicated_snapshot(*args, **kwargs)

delete_share_instance(*args, **kwargs)

Delete a share instance.

delete_share_replica(*args, **kwargs)

delete_share_server(*args, **kwargs)

delete_snapshot(*args, **kwargs)

Delete share snapshot.

deny_access(*args, **kwargs)

Deny access to some share.

extend_share(*args, **kwargs)

init_host(*args, **kwargs)

Initialization for a standalone service.

manage_share(*args, **kwargs)

manage_snapshot(*args, **kwargs)

migration_cancel(*args, **kwargs)

migration_complete(*args, **kwargs)

migration_driver_continue(*args, **kwargs)

Invokes driver to continue migration of shares.

migration_get_progress(*args, **kwargs)

migration_start(*args, **kwargs)

Migrates a share from current host to another host.

periodic_share_replica_snapshot_update(*args, **kwargs)

periodic_share_replica_update(*args, **kwargs)

promote_share_replica(*args, **kwargs)

provide_share_server(context, share_instance_id, share_network_id, snapshot_id=None)

Invoked to provide a compatible share server.

This method is invoked to find a compatible share server among the existing ones or create a share server database instance with the share server properties that will be used to create the share server later.

Parameters:	context – The ‘context.RequestContext’ object for the request. share_instance_id – The id of the share instance whose model attributes will be used to provide the share server. share_network_id – The id of the share network the share server to be provided has to be related to. snapshot_id – The id of the snapshot to be used to obtain the share server if applicable.
Returns:	The id of the share server that is being provided.

publish_service_capabilities(*args, **kwargs)

Collect driver status and then publish it.

shrink_share(*args, **kwargs)

unmanage_share(*args, **kwargs)

unmanage_snapshot(*args, **kwargs)

update_share_replica(*args, **kwargs)

Initiated by the force_update API.

add_hooks(f)

Hook decorator to perform action before and after a share method call

The hook decorator can perform actions before some share driver methods calls and after a call with results of driver call and preceding hook call.

locked_share_replica_operation(operation)

Lock decorator for share replica operations.

Takes a named lock prior to executing the operation. The lock is named with the id of the share to which the replica belongs.

Intended use: If a replica operation uses this decorator, it will block actions on all share replicas of the share until the named lock is free. This is used to protect concurrent operations on replicas of the same share e.g. promote ReplicaA while deleting ReplicaB, both belonging to the same share.

The manila.share.driver Module¶

Drivers for shares.

class ExecuteMixin

Bases: object

Provides an executable functionality to a driver class.

init_execute_mixin(*args, **kwargs)

set_execute(execute)

class GaneshaMixin

Bases: object

Augment derived classes with Ganesha configuration.

init_ganesha_mixin(*args, **kwargs)

class ShareDriver(driver_handles_share_servers, *args, **kwargs)

Bases: object

Class defines interface of NAS driver.

admin_network_api

allocate_admin_network(context, share_server, count=None, **kwargs)

Allocate admin network resources using given network information.

allocate_network(context, share_server, share_network, count=None, **kwargs)

Allocate network resources using given network information.

allow_access(context, share, access, share_server=None)

Allow access to the share.

check_for_setup_error()

Check for setup error.

choose_share_server_compatible_with_cg(context, share_servers, cg_ref, cgsnapshot=None)

choose_share_server_compatible_with_share(context, share_servers, share, snapshot=None, consistency_group=None)

Method that allows driver to choose share server for provided share.

If compatible share-server is not found, method should return None.

Parameters:	context – Current context share_servers – list with share-server models share – share model snapshot – snapshot model consistency_group – ConsistencyGroup model with shares
Returns:	share-server or None

connection_get_info(context, share, share_server=None)

Is called to provide necessary generic migration logic.

Parameters:	context – The ‘context.RequestContext’ object for the request. share – Reference to the share being migrated. share_server – Share server model or None.
Returns:	A dictionary with migration information.

create_cgsnapshot(context, snap_dict, share_server=None)

Create a consistency group snapshot.

Parameters:

context – snap_dict – The cgsnapshot details EXAMPLE: .. code: { 'status': 'available', 'project_id': '13c0be6290934bd98596cfa004650049', 'user_id': 'a0314a441ca842019b0952224aa39192', 'description': None, 'deleted': '0', 'created_at': datetime.datetime(2015, 8, 10, 0, 5, 58), 'updated_at': datetime.datetime(2015, 8, 10, 0, 5, 58), 'consistency_group_id': '4b04fdc3-00b9-4909-ba1a-06e9b3f88b67', 'cgsnapshot_members': [ { 'status': 'available', 'share_type_id': '1a9ed31e-ee70-483d-93ba-89690e028d7f', 'user_id': 'a0314a441ca842019b0952224aa39192', 'deleted': 'False', 'created_at': datetime.datetime(2015, 8, 10, 0, 5, 58), 'share': <models.Share>, 'updated_at': datetime.datetime(2015, 8, 10, 0, 5, 58), 'share_proto': 'NFS', 'project_id': '13c0be6290934bd98596cfa004650049', 'cgsnapshot_id': 'f6aa3b59-57eb-421e-965c-4e182538e36a', 'deleted_at': None, 'id': '6813e06b-a8f5-4784-b17d-f3e91afa370e', 'size': 1 } ], 'deleted_at': None, 'id': 'f6aa3b59-57eb-421e-965c-4e182538e36a', 'name': None }

Returns:

(cgsnapshot_update, member_update_list) cgsnapshot_update - a dict containing any values to be updated for the CGSnapshot in the database. This value may be None. member_update_list - a list of dictionaries containing for every member of the cgsnapshot. Each dict should contains values to be updated for the CGSnapshotMember in the database. This list may be empty or None.

create_consistency_group(context, cg_dict, share_server=None)

Create a consistency group.

Parameters:

context – cg_dict – The consistency group details EXAMPLE: { ‘status’: ‘creating’, ‘project_id’: ‘13c0be6290934bd98596cfa004650049’, ‘user_id’: ‘a0314a441ca842019b0952224aa39192’, ‘description’: None, ‘deleted’: ‘False’, ‘created_at’: datetime.datetime(2015, 8, 10, 15, 14, 6), ‘updated_at’: None, ‘source_cgsnapshot_id’: ‘f6aa3b59-57eb-421e-965c-4e182538e36a’, ‘host’: 'openstack2@cmodeSSVMNFS‘, ‘deleted_at’: None, ‘share_types’: [<models.ConsistencyGroupShareTypeMapping>], ‘id’: ‘eda52174-0442-476d-9694-a58327466c14’, ‘name’: None }

Returns:

(cg_model_update, share_update_list) cg_model_update - a dict containing any values to be updated for the CG in the database. This value may be None.

create_consistency_group_from_cgsnapshot(context, cg_dict, cgsnapshot_dict, share_server=None)

Create a consistency group from a cgsnapshot.

Parameters:

context – cg_dict – The consistency group details EXAMPLE: .. code: { 'status': 'creating', 'project_id': '13c0be6290934bd98596cfa004650049', 'user_id': 'a0314a441ca842019b0952224aa39192', 'description': None, 'deleted': 'False', 'created_at': datetime.datetime(2015, 8, 10, 15, 14, 6), 'updated_at': None, 'source_cgsnapshot_id': 'f6aa3b59-57eb-421e-965c-4e182538e36a', 'host': 'openstack2@cmodeSSVMNFS', 'deleted_at': None, 'shares': [<models.Share>], # The new shares being created 'share_types': [<models.ConsistencyGroupShareTypeMapping>], 'id': 'eda52174-0442-476d-9694-a58327466c14', 'name': None } cgsnapshot_dict – The cgsnapshot details EXAMPLE: .. code: { 'status': 'available', 'project_id': '13c0be6290934bd98596cfa004650049', 'user_id': 'a0314a441ca842019b0952224aa39192', 'description': None, 'deleted': '0', 'created_at': datetime.datetime(2015, 8, 10, 0, 5, 58), 'updated_at': datetime.datetime(2015, 8, 10, 0, 5, 58), 'consistency_group_id': '4b04fdc3-00b9-4909-ba1a-06e9b3f88b67', 'cgsnapshot_members': [ { 'status': 'available', 'share_type_id': '1a9ed31e-ee70-483d-93ba-89690e028d7f', 'user_id': 'a0314a441ca842019b0952224aa39192', 'deleted': 'False', 'created_at': datetime.datetime(2015, 8, 10, 0, 5, 58), 'share': <models.Share>, 'updated_at': datetime.datetime(2015, 8, 10, 0, 5, 58), 'share_proto': 'NFS', 'project_id': '13c0be6290934bd98596cfa004650049', 'cgsnapshot_id': 'f6aa3b59-57eb-421e-965c-4e182538e36a', 'deleted_at': None, 'id': '6813e06b-a8f5-4784-b17d-f3e91afa370e', 'size': 1 } ], 'deleted_at': None, 'id': 'f6aa3b59-57eb-421e-965c-4e182538e36a', 'name': None }

Returns:

(cg_model_update, share_update_list) cg_model_update - a dict containing any values to be updated for the CG in the database. This value may be None. share_update_list - a list of dictionaries containing dicts for every share created in the CG. Any share dicts should at a minimum contain the ‘id’ key and ‘export_locations’. Export locations should be in the same format as returned by a share_create. This list may be empty or None. EXAMPLE: .. code: [{'id': 'uuid', 'export_locations': ['export_path']}]

create_replica(context, replica_list, new_replica, access_rules, replica_snapshots, share_server=None)

Replicate the active replica to a new replica on this backend.

Note

This call is made on the host that the new replica is being created upon.

Parameters:	context – Current context replica_list – List of all replicas for a particular share. This list also contains the replica to be created. The ‘active’ replica will have its ‘replica_state’ attr set to ‘active’.

Example:

[
    {
    'id': 'd487b88d-e428-4230-a465-a800c2cce5f8',
    'share_id': 'f0e4bb5e-65f0-11e5-9d70-feff819cdc9f',
    'replica_state': 'in_sync',
        ...
    'share_server_id': '4ce78e7b-0ef6-4730-ac2a-fd2defefbd05',
    'share_server': <models.ShareServer> or None,
    },
    {
    'id': '10e49c3e-aca9-483b-8c2d-1c337b38d6af',
    'share_id': 'f0e4bb5e-65f0-11e5-9d70-feff819cdc9f',
    'replica_state': 'active',
        ...
    'share_server_id': 'f63629b3-e126-4448-bec2-03f788f76094',
    'share_server': <models.ShareServer> or None,
    },
    {
    'id': 'e82ff8b6-65f0-11e5-9d70-feff819cdc9f',
    'share_id': 'f0e4bb5e-65f0-11e5-9d70-feff819cdc9f',
    'replica_state': 'in_sync',
        ...
    'share_server_id': '07574742-67ea-4dfd-9844-9fbd8ada3d87',
    'share_server': <models.ShareServer> or None,
    },
    ...
]

Parameters:	new_replica – The share replica dictionary.

Example:

{
    'id': 'e82ff8b6-65f0-11e5-9d70-feff819cdc9f',
    'share_id': 'f0e4bb5e-65f0-11e5-9d70-feff819cdc9f',
    'deleted': False,
    'host': 'openstack2@cmodeSSVMNFS2',
    'status': 'creating',
    'scheduled_at': datetime.datetime(2015, 8, 10, 0, 5, 58),
    'launched_at': datetime.datetime(2015, 8, 10, 0, 5, 58),
    'terminated_at': None,
    'replica_state': 'out_of_sync',
    'availability_zone_id': 'f6e146d0-65f0-11e5-9d70-feff819cdc9f',
    'export_locations': [
        models.ShareInstanceExportLocations,
    ],
    'access_rules_status': 'out_of_sync',
    'share_network_id': '4ccd5318-65f1-11e5-9d70-feff819cdc9f',
    'share_server_id': 'e6155221-ea00-49ef-abf9-9f89b7dd900a',
    'share_server': <models.ShareServer> or None,
}

Parameters:	access_rules – A list of access rules. These are rules that other instances of the share already obey. Drivers are expected to apply access rules to the new replica or disregard access rules that don’t apply.

Example:

[
 {
    'id': 'f0875f6f-766b-4865-8b41-cccb4cdf1676',
    'deleted' = False,
    'share_id' = 'f0e4bb5e-65f0-11e5-9d70-feff819cdc9f',
    'access_type' = 'ip',
    'access_to' = '172.16.20.1',
    'access_level' = 'rw',
 }
]

Parameters:

replica_snapshots – List of dictionaries of snapshot instances. This includes snapshot instances of every snapshot of the share whose ‘aggregate_status’ property was reported to be ‘available’ when the share manager initiated this request. Each list member will have two sub dictionaries: ‘active_replica_snapshot’ and ‘share_replica_snapshot’. The ‘active’ replica snapshot corresponds to the instance of the snapshot on any of the ‘active’ replicas of the share while share_replica_snapshot corresponds to the snapshot instance for the specific replica that will need to exist on the new share replica that is being created. The driver needs to ensure that this snapshot instance is truly available before transitioning the replica from ‘out_of_sync’ to ‘in_sync’. Snapshots instances for snapshots that have an ‘aggregate_status’ of ‘creating’ or ‘deleting’ will be polled for in the update_replicated_snapshot method.

Example:

[
 {
 'active_replica_snapshot': {
    'id': '8bda791c-7bb6-4e7b-9b64-fefff85ff13e',
    'share_instance_id': '10e49c3e-aca9-483b-8c2d-1c337b38d6af',
    'status': 'available',
    'provider_location': '/newton/share-snapshot-10e49c3e-aca9',
    ...
    },
 'share_replica_snapshot': {
    'id': '',
    'share_instance_id': 'e82ff8b6-65f0-11e5-9d70-feff819cdc9f',
    'status': 'available',
    'provider_location': None,
        ...
    },
 }
]

Parameters:	share_server – <models.ShareServer> or None Share server of the replica being created.
Returns:	None or a dictionary. The dictionary can contain export_locations replica_state and access_rules_status. export_locations is a list of paths and replica_state is one of ‘active’, ‘in_sync’, ‘out_of_sync’ or ‘error’.

Important

A backend supporting ‘writable’ type replication should return ‘active’ as the replica_state.

Export locations should be in the same format as returned during the create_share call.

Example:

{
    'export_locations': [
        {
            'path': '172.16.20.22/sample/export/path',
             'is_admin_only': False,
             'metadata': {'some_key': 'some_value'},
        },
    ],
     'replica_state': 'in_sync',
     'access_rules_status': 'in_sync',
}

create_replicated_snapshot(context, replica_list, replica_snapshots, share_server=None)

Create a snapshot on active instance and update across the replicas.

Note

This call is made on the ‘active’ replica’s host. Drivers are expected to transfer the snapshot created to the respective replicas.

The driver is expected to return model updates to the share manager. If it was able to confirm the creation of any number of the snapshot instances passed in this interface, it can set their status to ‘available’ as a cue for the share manager to set the progress attr to ‘100%’.

Parameters:	context – Current context replica_list – List of all replicas for a particular share The ‘active’ replica will have its ‘replica_state’ attr set to ‘active’.

Example:

[
    {
    'id': 'd487b88d-e428-4230-a465-a800c2cce5f8',
    'share_id': 'f0e4bb5e-65f0-11e5-9d70-feff819cdc9f',
    'replica_state': 'in_sync',
        ...
    'share_server_id': '4ce78e7b-0ef6-4730-ac2a-fd2defefbd05',
    'share_server': <models.ShareServer> or None,
    },
    {
    'id': '10e49c3e-aca9-483b-8c2d-1c337b38d6af',
    'share_id': 'f0e4bb5e-65f0-11e5-9d70-feff819cdc9f',
    'replica_state': 'active',
        ...
    'share_server_id': 'f63629b3-e126-4448-bec2-03f788f76094',
    'share_server': <models.ShareServer> or None,
    },
    ...
]

Parameters:	replica_snapshots – List of dictionaries of snapshot instances. These snapshot instances track the snapshot across the replicas. All the instances will have their status attribute set to ‘creating’.

Example:

 [
    {
    'id': 'd3931a93-3984-421e-a9e7-d9f71895450a',
    'snapshot_id': '13ee5cb5-fc53-4539-9431-d983b56c5c40',
    'status: 'creating',
    'progress': '0%',
        ...
    },
    {
    'id': '8bda791c-7bb6-4e7b-9b64-fefff85ff13e',
    'snapshot_id': '13ee5cb5-fc53-4539-9431-d983b56c5c40',
    'status: 'creating',
    'progress': '0%',
        ...
    },
    ...
]

Parameters:	share_server – <models.ShareServer> or None
Returns:	List of dictionaries of snapshot instances. The dictionaries can contain values that need to be updated on the database for the snapshot instances being created.
Raises:	Exception. Any exception in this method will set all instances to ‘error’.

create_share(context, share, share_server=None)

Is called to create share.

create_share_from_snapshot(context, share, snapshot, share_server=None)

Is called to create share from snapshot.

create_snapshot(context, snapshot, share_server=None)

Is called to create snapshot.

Parameters:	context – Current context snapshot – Snapshot model. Share model could be retrieved through snapshot[‘share’]. share_server – Share server model or None.

deallocate_network(context, share_server_id)

Deallocate network resources for the given share server.

delete_cgsnapshot(context, snap_dict, share_server=None)

Delete a consistency group snapshot

Parameters:

context – snap_dict – The cgsnapshot details EXAMPLE: .. code: { 'status': 'available', 'project_id': '13c0be6290934bd98596cfa004650049', 'user_id': 'a0314a441ca842019b0952224aa39192', 'description': None, 'deleted': '0', 'created_at': datetime.datetime(2015, 8, 10, 0, 5, 58), 'updated_at': datetime.datetime(2015, 8, 10, 0, 5, 58), 'consistency_group_id': '4b04fdc3-00b9-4909-ba1a-06e9b3f88b67', 'cgsnapshot_members': [ { 'status': 'available', 'share_type_id': '1a9ed31e-ee70-483d-93ba-89690e028d7f', 'share_id': 'e14b5174-e534-4f35-bc4f-fe81c1575d6f', 'user_id': 'a0314a441ca842019b0952224aa39192', 'deleted': 'False', 'created_at': datetime.datetime(2015, 8, 10, 0, 5, 58), 'share': <models.Share>, 'updated_at': datetime.datetime(2015, 8, 10, 0, 5, 58), 'share_proto': 'NFS', 'project_id': '13c0be6290934bd98596cfa004650049', 'cgsnapshot_id': 'f6aa3b59-57eb-421e-965c-4e182538e36a', 'deleted_at': None, 'id': '6813e06b-a8f5-4784-b17d-f3e91afa370e', 'size': 1 } ], 'deleted_at': None, 'id': 'f6aa3b59-57eb-421e-965c-4e182538e36a', 'name': None }

Returns:

(cgsnapshot_update, member_update_list) cgsnapshot_update - a dict containing any values to be updated for the CGSnapshot in the database. This value may be None.

delete_consistency_group(context, cg_dict, share_server=None)

Delete a consistency group

Parameters:

context – The request context cg_dict – The consistency group details EXAMPLE: .. code: { 'status': 'creating', 'project_id': '13c0be6290934bd98596cfa004650049', 'user_id': 'a0314a441ca842019b0952224aa39192', 'description': None, 'deleted': 'False', 'created_at': datetime.datetime(2015, 8, 10, 15, 14, 6), 'updated_at': None, 'source_cgsnapshot_id': 'f6aa3b59-57eb-421e-965c-4e182538e36a', 'host': 'openstack2@cmodeSSVMNFS', 'deleted_at': None, 'shares': [<models.Share>], # The new shares being created 'share_types': [<models.ConsistencyGroupShareTypeMapping>], 'id': 'eda52174-0442-476d-9694-a58327466c14', 'name': None }

Returns:

cg_model_update cg_model_update - a dict containing any values to be updated for the CG in the database. This value may be None.

delete_replica(context, replica_list, replica_snapshots, replica, share_server=None)

Delete a replica.

Note

This call is made on the host that hosts the replica being deleted.

Parameters:	context – Current context replica_list – List of all replicas for a particular share This list also contains the replica to be deleted. The ‘active’ replica will have its ‘replica_state’ attr set to ‘active’.

Example:

[
    {
    'id': 'd487b88d-e428-4230-a465-a800c2cce5f8',
    'share_id': 'f0e4bb5e-65f0-11e5-9d70-feff819cdc9f',
    'replica_state': 'in_sync',
        ...
    'share_server_id': '4ce78e7b-0ef6-4730-ac2a-fd2defefbd05',
    'share_server': <models.ShareServer> or None,
    },
    {
    'id': '10e49c3e-aca9-483b-8c2d-1c337b38d6af',
    'share_id': 'f0e4bb5e-65f0-11e5-9d70-feff819cdc9f',
    'replica_state': 'active',
        ...
    'share_server_id': 'f63629b3-e126-4448-bec2-03f788f76094',
    'share_server': <models.ShareServer> or None,
    },
    {
    'id': 'e82ff8b6-65f0-11e5-9d70-feff819cdc9f',
    'share_id': 'f0e4bb5e-65f0-11e5-9d70-feff819cdc9f',
    'replica_state': 'in_sync',
        ...
    'share_server_id': '07574742-67ea-4dfd-9844-9fbd8ada3d87',
    'share_server': <models.ShareServer> or None,
    },
    ...
]

Parameters:	replica – Dictionary of the share replica being deleted.

Example:

{
    'id': 'e82ff8b6-65f0-11e5-9d70-feff819cdc9f',
    'share_id': 'f0e4bb5e-65f0-11e5-9d70-feff819cdc9f',
    'deleted': False,
    'host': 'openstack2@cmodeSSVMNFS2',
    'status': 'available',
    'scheduled_at': datetime.datetime(2015, 8, 10, 0, 5, 58),
    'launched_at': datetime.datetime(2015, 8, 10, 0, 5, 58),
    'terminated_at': None,
    'replica_state': 'in_sync',
    'availability_zone_id': 'f6e146d0-65f0-11e5-9d70-feff819cdc9f',
    'export_locations': [
        models.ShareInstanceExportLocations
    ],
    'access_rules_status': 'out_of_sync',
    'share_network_id': '4ccd5318-65f1-11e5-9d70-feff819cdc9f',
    'share_server_id': '53099868-65f1-11e5-9d70-feff819cdc9f',
    'share_server': <models.ShareServer> or None,
}

Parameters:

replica_snapshots – List of dictionaries of snapshot instances. The dict contains snapshot instances that are associated with the share replica being deleted. No model updates to snapshot instances are possible in this method. The driver should return when the cleanup is completed on the backend for both, the snapshots and the replica itself. Drivers must handle situations where the snapshot may not yet have finished ‘creating’ on this replica.

Example:

[
    {
    'id': '89dafd00-0999-4d23-8614-13eaa6b02a3b',
    'snapshot_id': '3ce1caf7-0945-45fd-a320-714973e949d3',
    'status: 'available',
    'share_instance_id': 'e82ff8b6-65f0-11e5-9d70-feff819cdc9f'
        ...
    },
    {
    'id': '8bda791c-7bb6-4e7b-9b64-fefff85ff13e',
    'snapshot_id': '13ee5cb5-fc53-4539-9431-d983b56c5c40',
    'status: 'creating',
    'share_instance_id': 'e82ff8b6-65f0-11e5-9d70-feff819cdc9f'
        ...
    },
    ...
]

Parameters:	share_server – <models.ShareServer> or None Share server of the replica to be deleted.
Returns:	None.
Raises:	Exception. Any exception raised will set the share replica’s ‘status’ and ‘replica_state’ attributes to ‘error_deleting’. It will not affect snapshots belonging to this replica.

delete_replicated_snapshot(context, replica_list, replica_snapshots, share_server=None)

Delete a snapshot by deleting its instances across the replicas.

Note

This call is made on the ‘active’ replica’s host, since drivers may not be able to delete the snapshot from an individual replica.

The driver is expected to return model updates to the share manager. If it was able to confirm the removal of any number of the snapshot instances passed in this interface, it can set their status to ‘deleted’ as a cue for the share manager to clean up that instance from the database.

Parameters:	context – Current context replica_list – List of all replicas for a particular share The ‘active’ replica will have its ‘replica_state’ attr set to ‘active’.

Example:

[
    {
    'id': 'd487b88d-e428-4230-a465-a800c2cce5f8',
    'share_id': 'f0e4bb5e-65f0-11e5-9d70-feff819cdc9f',
    'replica_state': 'in_sync',
        ...
    'share_server_id': '4ce78e7b-0ef6-4730-ac2a-fd2defefbd05',
    'share_server': <models.ShareServer> or None,
    },
    {
    'id': '10e49c3e-aca9-483b-8c2d-1c337b38d6af',
    'share_id': 'f0e4bb5e-65f0-11e5-9d70-feff819cdc9f',
    'replica_state': 'active',
        ...
    'share_server_id': 'f63629b3-e126-4448-bec2-03f788f76094',
    'share_server': <models.ShareServer> or None,
    },
    ...
]

Parameters:	replica_snapshots – List of dictionaries of snapshot instances. These snapshot instances track the snapshot across the replicas. All the instances will have their status attribute set to ‘deleting’.

Example:

 [
    {
    'id': 'd3931a93-3984-421e-a9e7-d9f71895450a',
    'snapshot_id': '13ee5cb5-fc53-4539-9431-d983b56c5c40',
    'status': 'deleting',
    'progress': '100%',
        ...
    },
    {
    'id': '8bda791c-7bb6-4e7b-9b64-fefff85ff13e',
    'snapshot_id': '13ee5cb5-fc53-4539-9431-d983b56c5c40',
    'status: 'deleting',
    'progress': '100%',
        ...
    },
    ...
]

Parameters:	share_server – <models.ShareServer> or None
Returns:	List of dictionaries of snapshot instances. The dictionaries can contain values that need to be updated on the database for the snapshot instances being deleted. To confirm the deletion of the snapshot instance, set the ‘status’ attribute of the instance to ‘deleted’ (constants.STATUS_DELETED)
Raises:	Exception. Any exception in this method will set the status attribute of all snapshot instances to ‘error_deleting’.

delete_share(context, share, share_server=None)

Is called to remove share.

delete_snapshot(context, snapshot, share_server=None)

Is called to remove snapshot.

Parameters:	context – Current context snapshot – Snapshot model. Share model could be retrieved through snapshot[‘share’]. share_server – Share server model or None.

deny_access(context, share, access, share_server=None)

Deny access to the share.

do_setup(context)

Any initialization the share driver does while starting.

driver_handles_share_servers

ensure_share(context, share, share_server=None)

Invoked to ensure that share is exported.

Driver can use this method to update the list of export locations of the share if it changes. To do that, you should return list with export locations.

:return None or list with export locations

extend_share(share, new_size, share_server=None)

Extends size of existing share.

Parameters:	share – Share model new_size – New size of share (new_size > share[‘size’]) share_server – Optional – Share server model

get_admin_network_allocations_number()

get_default_filter_function()

Get the default filter_function string.

Each driver could overwrite the method to return a well-known default string if it is available.

Returns:	None

get_default_goodness_function()

Get the default goodness_function string.

Each driver could overwrite the method to return a well-known default string if it is available.

Returns:	None

get_filter_function()

Get filter_function string.

Returns either the string from the driver instance or global section in manila.conf. If nothing is specified in manila.conf, then try to find the default filter_function. When None is returned the scheduler will always pass the driver instance.

:return a filter_function string or None

get_goodness_function()

Get good_function string.

Returns either the string from the driver instance or global section in manila.conf. If nothing is specified in manila.conf, then try to find the default goodness_function. When None is returned the scheduler will give the lowest score to the driver instance.

:return a goodness_function string or None

get_network_allocations_number()

Returns number of network allocations for creating VIFs.

Drivers that use Nova for share servers should return zero (0) here same as Generic driver does. Because Nova will handle network resources allocation. Drivers that handle networking itself should calculate it according to their own requirements. It can have 1+ network interfaces.

get_periodic_hook_data(context, share_instances)

Dedicated for update/extend of data for existing share instances.

Redefine this method in share driver to be able to update/change/extend share instances data that will be used by periodic hook action. One of possible updates is add-on of “automount” CLI commands for each share instance for case of notification is enabled using ‘hook’ approach.

Parameters:	context – Current context share_instances – share instances list provided by share manager
Returns:	list of share instances.

get_pool(share)

Return pool name where the share resides on.

Parameters:	share – The share hosted by the driver.

get_share_server_pools(share_server)

Return list of pools related to a particular share server.

Parameters:	share_server – ShareServer class instance.

get_share_stats(refresh=False)

Get share status.

If ‘refresh’ is True, run update the stats first.

manage_existing(share, driver_options)

Brings an existing share under Manila management.

If the provided share is not valid, then raise a ManageInvalidShare exception, specifying a reason for the failure.

If the provided share is not in a state that can be managed, such as being replicated on the backend, the driver MUST raise ManageInvalidShare exception with an appropriate message.

The share has a share_type, and the driver can inspect that and compare against the properties of the referenced backend share. If they are incompatible, raise a ManageExistingShareTypeMismatch, specifying a reason for the failure.

Parameters:	share – Share model driver_options – Driver-specific options provided by admin.
Returns:	share_update dictionary with required key ‘size’, which should contain size of the share.

manage_existing_snapshot(snapshot, driver_options)

Brings an existing snapshot under Manila management.

If provided snapshot is not valid, then raise a ManageInvalidShareSnapshot exception, specifying a reason for the failure.

Parameters:	snapshot – ShareSnapshotInstance model with ShareSnapshot data.

Example::

{ ‘id’: <instance id>, ‘snapshot_id’: < snapshot id>, ‘provider_location’: <location>, ... }

Parameters:	driver_options – Optional driver-specific options provided by admin.

Example:

{
'key': 'value',
...
}

Returns:	model_update dictionary with required key ‘size’, which should contain size of the share snapshot.

migration_cancel(context, source_share, destination_share, share_server=None, destination_share_server=None)

Cancels migration of a given share to another host.

Note

Is called in source share’s backend to cancel migration.

If possible, driver can implement a way to cancel an in-progress migration.

Parameters:	context – The ‘context.RequestContext’ object for the request. source_share – Reference to the original share model. destination_share – Reference to the share model to be used by migrated share. share_server – Share server model or None. destination_share_server – Destination Share server model or None.

migration_check_compatibility(context, source_share, destination_share, share_server=None, destination_share_server=None)

Checks destination compatibility for migration of a given share.

Note

Is called to test compatibility with destination backend.

Driver should check if it is compatible with destination backend so driver-assisted migration can proceed.

Parameters:	context – The ‘context.RequestContext’ object for the request. source_share – Reference to the share to be migrated. destination_share – Reference to the share model to be used by migrated share. share_server – Share server model or None. destination_share_server – Destination Share server model or None.
Returns:	A dictionary containing values indicating if destination backend is compatible, if share can remain writable during migration, if it can preserve all file metadata and if it can perform migration of given share non-disruptively. Example: { ‘compatible’: True, ‘writable’: True, ‘preserve_metadata’: True, ‘nondisruptive’: True, }

migration_complete(context, source_share, destination_share, share_server=None, destination_share_server=None)

Completes migration of a given share to another host.

Note

Is called in source share’s backend to complete migration.

If driver is implementing 2-phase migration, this method should perform the disruptive tasks related to the 2nd phase of migration, thus completing it. Driver should also delete all original share data from source backend.

Parameters:	context – The ‘context.RequestContext’ object for the request. source_share – Reference to the original share model. destination_share – Reference to the share model to be used by migrated share. share_server – Share server model or None. destination_share_server – Destination Share server model or None.
Returns:	List of export locations to update the share with.

migration_continue(context, source_share, destination_share, share_server=None, destination_share_server=None)

Continues migration of a given share to another host.

Note

Is called in source share’s backend to continue migration.

Driver should implement this method to continue monitor the migration progress in storage and perform following steps until 1st phase is completed.

Parameters:	context – The ‘context.RequestContext’ object for the request. source_share – Reference to the original share model. destination_share – Reference to the share model to be used by migrated share. share_server – Share server model or None. destination_share_server – Destination Share server model or None.
Returns:	Boolean value to indicate if 1st phase is finished.

migration_get_progress(context, source_share, destination_share, share_server=None, destination_share_server=None)

Obtains progress of migration of a given share to another host.

Note

Is called in source share’s backend to obtain migration progress.

If possible, driver can implement a way to return migration progress information. :param context: The ‘context.RequestContext’ object for the request. :param source_share: Reference to the original share model. :param destination_share: Reference to the share model to be used by

migrated share.

Parameters:	share_server – Share server model or None. destination_share_server – Destination Share server model or None.
Returns:	A dictionary with at least ‘total_progress’ field containing the percentage value.

migration_start(context, source_share, destination_share, share_server=None, destination_share_server=None)

Starts migration of a given share to another host.

Note

Is called in source share’s backend to start migration.

Driver should implement this method if willing to perform migration in a driver-assisted way, useful for when source share’s backend driver is compatible with destination backend driver. This method should start the migration procedure in the backend and end. Following steps should be done in ‘migration_continue’.

Parameters:	context – The ‘context.RequestContext’ object for the request. source_share – Reference to the original share model. destination_share – Reference to the share model to be used by migrated share. share_server – Share server model or None. destination_share_server – Destination Share server model or None.

promote_replica(context, replica_list, replica, access_rules, share_server=None)

Promote a replica to ‘active’ replica state.

Note

This call is made on the host that hosts the replica being promoted.

Parameters:	context – Current context replica_list – List of all replicas for a particular share This list also contains the replica to be promoted. The ‘active’ replica will have its ‘replica_state’ attr set to ‘active’.

Example:

[
    {
    'id': 'd487b88d-e428-4230-a465-a800c2cce5f8',
    'share_id': 'f0e4bb5e-65f0-11e5-9d70-feff819cdc9f',
    'replica_state': 'in_sync',
        ...
    'share_server_id': '4ce78e7b-0ef6-4730-ac2a-fd2defefbd05',
    'share_server': <models.ShareServer> or None,
    },
    {
    'id': '10e49c3e-aca9-483b-8c2d-1c337b38d6af',
    'share_id': 'f0e4bb5e-65f0-11e5-9d70-feff819cdc9f',
    'replica_state': 'active',
        ...
    'share_server_id': 'f63629b3-e126-4448-bec2-03f788f76094',
    'share_server': <models.ShareServer> or None,
    },
    {
    'id': 'e82ff8b6-65f0-11e5-9d70-feff819cdc9f',
    'share_id': 'f0e4bb5e-65f0-11e5-9d70-feff819cdc9f',
    'replica_state': 'in_sync',
        ...
    'share_server_id': '07574742-67ea-4dfd-9844-9fbd8ada3d87',
    'share_server': <models.ShareServer> or None,
    },
    ...
]

Parameters:	replica – Dictionary of the replica to be promoted.

Example:

{
    'id': 'e82ff8b6-65f0-11e5-9d70-feff819cdc9f',
    'share_id': 'f0e4bb5e-65f0-11e5-9d70-feff819cdc9f',
    'deleted': False,
    'host': 'openstack2@cmodeSSVMNFS2',
    'status': 'available',
    'scheduled_at': datetime.datetime(2015, 8, 10, 0, 5, 58),
    'launched_at': datetime.datetime(2015, 8, 10, 0, 5, 58),
    'terminated_at': None,
    'replica_state': 'in_sync',
    'availability_zone_id': 'f6e146d0-65f0-11e5-9d70-feff819cdc9f',
    'export_locations': [
        models.ShareInstanceExportLocations
    ],
    'access_rules_status': 'in_sync',
    'share_network_id': '4ccd5318-65f1-11e5-9d70-feff819cdc9f',
    'share_server_id': '07574742-67ea-4dfd-9844-9fbd8ada3d87',
    'share_server': <models.ShareServer> or None,
}

Parameters:	access_rules – A list of access rules These access rules are obeyed by other instances of the share

Example:

[
 {
    'id': 'f0875f6f-766b-4865-8b41-cccb4cdf1676',
    'deleted' = False,
    'share_id' = 'f0e4bb5e-65f0-11e5-9d70-feff819cdc9f',
    'access_type' = 'ip',
    'access_to' = '172.16.20.1',
    'access_level' = 'rw',
 }
]

Parameters:	share_server – <models.ShareServer> or None Share server of the replica to be promoted.
Returns:	updated_replica_list or None. The driver can return the updated list as in the request parameter. Changes that will be updated to the Database are: ‘export_locations’, ‘access_rules_status’ and ‘replica_state’.
Raises:	Exception. This can be any exception derived from BaseException. This is re-raised by the manager after some necessary cleanup. If the driver raises an exception during promotion, it is assumed that all of the replicas of the share are in an inconsistent state. Recovery is only possible through the periodic update call and/or administrator intervention to correct the ‘status’ of the affected replicas if they become healthy again.

replication_domain

setup_server(*args, **kwargs)

shrink_share(share, new_size, share_server=None)

Shrinks size of existing share.

If consumed space on share larger than new_size driver should raise ShareShrinkingPossibleDataLoss exception: raise ShareShrinkingPossibleDataLoss(share_id=share[‘id’])

Parameters:	share – Share model new_size – New size of share (new_size < share[‘size’]) share_server – Optional – Share server model

:raises ShareShrinkingPossibleDataLoss, NotImplementedError

snapshots_are_supported

teardown_server(*args, **kwargs)

unmanage(share)

Removes the specified share from Manila management.

Does not delete the underlying backend share.

For most drivers, this will not need to do anything. However, some drivers might use this call as an opportunity to clean up any Manila-specific configuration that they have associated with the backend share.

If provided share cannot be unmanaged, then raise an UnmanageInvalidShare exception, specifying a reason for the failure.

unmanage_snapshot(snapshot)

Removes the specified snapshot from Manila management.

Does not delete the underlying backend share snapshot.

For most drivers, this will not need to do anything. However, some drivers might use this call as an opportunity to clean up any Manila-specific configuration that they have associated with the backend share snapshot.

If provided share snapshot cannot be unmanaged, then raise an UnmanageInvalidShareSnapshot exception, specifying a reason for the failure.

update_access(context, share, access_rules, add_rules, delete_rules, share_server=None)

Update access rules for given share.

Drivers should support 2 different cases in this method: 1. Recovery after error - ‘access_rules’ contains all access_rules, ‘add_rules’ and ‘delete_rules’ shall be empty. Driver should clear any existent access rules and apply all access rules for given share. This recovery is made at driver start up.

2. Adding/Deleting of several access rules - ‘access_rules’ contains all access_rules, ‘add_rules’ and ‘delete_rules’ contain rules which should be added/deleted. Driver can ignore rules in ‘access_rules’ and apply only rules from ‘add_rules’ and ‘delete_rules’.

Drivers must be mindful of this call for share replicas. When ‘update_access’ is called on one of the replicas, the call is likely propagated to all replicas belonging to the share, especially when individual rules are added or removed. If a particular access rule does not make sense to the driver in the context of a given replica, the driver should be careful to report a correct behavior, and take meaningful action. For example, if R/W access is requested on a replica that is part of a “readable” type replication; R/O access may be added by the driver instead of R/W. Note that raising an exception will result in the access_rules_status on the replica, and the share itself being “out_of_sync”. Drivers can sync on the valid access rules that are provided on the create_replica and promote_replica calls.

Parameters:

context – Current context share – Share model with share data. access_rules – All access rules for given share add_rules – Empty List or List of access rules which should be added. access_rules already contains these rules. delete_rules – Empty List or List of access rules which should be removed. access_rules doesn’t contain these rules. share_server – None or Share server model

Returns:

None, or a dictionary of access_id, access_key as key: value pairs for the rules added, where, access_id is the UUID (string) of the access rule, and access_key is the credential (string) of the entity granted access. During recovery after error, the returned dictionary must contain access_id, access_key for all the rules that the driver is ordered to resync, i.e. rules in the access_rules parameter.

update_admin_network_allocation(context, share_server)

Update admin network allocation after share server creation.

update_network_allocation(context, share_server)

Update network allocation after share server creation.

update_replica_state(context, replica_list, replica, access_rules, replica_snapshots, share_server=None)

Update the replica_state of a replica.

Note

This call is made on the host which hosts the replica being updated.

Drivers should fix replication relationships that were broken if possible inside this method.

This method is called periodically by the share manager; and whenever requested by the administrator through the ‘resync’ API.

Parameters:	context – Current context replica_list – List of all replicas for a particular share This list also contains the replica to be updated. The ‘active’ replica will have its ‘replica_state’ attr set to ‘active’.

Example:

[
    {
    'id': 'd487b88d-e428-4230-a465-a800c2cce5f8',
    'share_id': 'f0e4bb5e-65f0-11e5-9d70-feff819cdc9f',
    'replica_state': 'in_sync',
        ...
    'share_server_id': '4ce78e7b-0ef6-4730-ac2a-fd2defefbd05',
    'share_server': <models.ShareServer> or None,
    },
    {
    'id': '10e49c3e-aca9-483b-8c2d-1c337b38d6af',
    'share_id': 'f0e4bb5e-65f0-11e5-9d70-feff819cdc9f',
    'replica_state': 'active',
        ...
    'share_server_id': 'f63629b3-e126-4448-bec2-03f788f76094',
    'share_server': <models.ShareServer> or None,
    },
    {
    'id': 'e82ff8b6-65f0-11e5-9d70-feff819cdc9f',
    'share_id': 'f0e4bb5e-65f0-11e5-9d70-feff819cdc9f',
    'replica_state': 'in_sync',
        ...
    'share_server_id': '07574742-67ea-4dfd-9844-9fbd8ada3d87',
    'share_server': <models.ShareServer> or None,
    },
    ...
]

Parameters:	replica – Dictionary of the replica being updated Replica state will always be ‘in_sync’, ‘out_of_sync’, or ‘error’. Replicas in ‘active’ state will not be passed via this parameter.

Example:

{
    'id': 'd487b88d-e428-4230-a465-a800c2cce5f8',
    'share_id': 'f0e4bb5e-65f0-11e5-9d70-feff819cdc9f',
    'deleted': False,
    'host': 'openstack2@cmodeSSVMNFS1',
    'status': 'available',
    'scheduled_at': datetime.datetime(2015, 8, 10, 0, 5, 58),
    'launched_at': datetime.datetime(2015, 8, 10, 0, 5, 58),
    'terminated_at': None,
    'replica_state': 'in_sync',
    'availability_zone_id': 'e2c2db5c-cb2f-4697-9966-c06fb200cb80',
    'export_locations': [
        models.ShareInstanceExportLocations,
    ],
    'access_rules_status': 'in_sync',
    'share_network_id': '4ccd5318-65f1-11e5-9d70-feff819cdc9f',
    'share_server_id': '4ce78e7b-0ef6-4730-ac2a-fd2defefbd05',
}

Parameters:	access_rules – A list of access rules These access rules are obeyed by other instances of the share. The driver could attempt to sync on any un-applied access_rules.

Example:

[
 {
    'id': 'f0875f6f-766b-4865-8b41-cccb4cdf1676',
    'deleted' = False,
    'share_id' = 'f0e4bb5e-65f0-11e5-9d70-feff819cdc9f',
    'access_type' = 'ip',
    'access_to' = '172.16.20.1',
    'access_level' = 'rw',
 }
]

Parameters:

replica_snapshots – List of dictionaries of snapshot instances. This includes snapshot instances of every snapshot of the share whose ‘aggregate_status’ property was reported to be ‘available’ when the share manager initiated this request. Each list member will have two sub dictionaries: ‘active_replica_snapshot’ and ‘share_replica_snapshot’. The ‘active’ replica snapshot corresponds to the instance of the snapshot on any of the ‘active’ replicas of the share while share_replica_snapshot corresponds to the snapshot instance for the specific replica being updated. The driver needs to ensure that this snapshot instance is truly available before transitioning from ‘out_of_sync’ to ‘in_sync’. Snapshots instances for snapshots that have an ‘aggregate_status’ of ‘creating’ or ‘deleting’ will be polled for in the update_replicated_snapshot method.

Example:

 [
  {
'active_replica_snapshot': {
     'id': '8bda791c-7bb6-4e7b-9b64-fefff85ff13e',
     'share_instance_id': '10e49c3e-aca9-483b-8c2d-1c337b38d6af',
     'status': 'available',
     'provider_location': '/newton/share-snapshot-10e49c3e-aca9',
     ...
    },
 'share_replica_snapshot': {
     'id': '10e49c3e-aca9-483b-8c2d-1c337b38d6af',
     'share_instance_id': 'd487b88d-e428-4230-a465-a800c2cce5f8',
     'status': 'creating',
     'provider_location': None,
        ...
    },
  }
 ]

Parameters:	share_server – <models.ShareServer> or None
Returns:	replica_state: a str value denoting the replica_state. Valid values are ‘in_sync’ and ‘out_of_sync’ or None (to leave the current replica_state unchanged).

update_replicated_snapshot(context, replica_list, share_replica, replica_snapshots, replica_snapshot, share_server=None)

Update the status of a snapshot instance that lives on a replica.

Note

For DR and Readable styles of replication, this call is made on the replica’s host and not the ‘active’ replica’s host.

This method is called periodically by the share manager. It will query for snapshot instances that track the parent snapshot across non-‘active’ replicas. Drivers can expect the status of the instance to be ‘creating’ or ‘deleting’. If the driver sees that a snapshot instance has been removed from the replica’s backend and the instance status was set to ‘deleting’, it is expected to raise a SnapshotResourceNotFound exception. All other exceptions will set the snapshot instance status to ‘error’. If the instance was not in ‘deleting’ state, raising a SnapshotResourceNotFound will set the instance status to ‘error’.

Parameters:	context – Current context replica_list – List of all replicas for a particular share The ‘active’ replica will have its ‘replica_state’ attr set to ‘active’.

Example:

[
     {
      'id': 'd487b88d-e428-4230-a465-a800c2cce5f8',
      'share_id': 'f0e4bb5e-65f0-11e5-9d70-feff819cdc9f',
      'replica_state': 'in_sync',
      ...
      'share_server_id': '4ce78e7b-0ef6-4730-ac2a-fd2defefbd05',
      'share_server': <models.ShareServer> or None,
     },
     {
      'id': '10e49c3e-aca9-483b-8c2d-1c337b38d6af',
      'share_id': 'f0e4bb5e-65f0-11e5-9d70-feff819cdc9f',
      'replica_state': 'active',
      ...
      'share_server_id': 'f63629b3-e126-4448-bec2-03f788f76094',
      'share_server': <models.ShareServer> or None,
     },
      ...
]

Parameters:	share_replica – Share replica dictionary. This replica is associated with the snapshot instance whose status is being updated. Replicas in ‘active’ replica_state will not be passed via this parameter.

Example:

{
    'id': 'd487b88d-e428-4230-a465-a800c2cce5f8',
    'share_id': 'f0e4bb5e-65f0-11e5-9d70-feff819cdc9f',
    'deleted': False,
    'host': 'openstack2@cmodeSSVMNFS1',
    'status': 'available',
    'scheduled_at': datetime.datetime(2015, 8, 10, 0, 5, 58),
    'launched_at': datetime.datetime(2015, 8, 10, 0, 5, 58),
    'terminated_at': None,
    'replica_state': 'in_sync',
    'availability_zone_id': 'e2c2db5c-cb2f-4697-9966-c06fb200cb80',
    'export_locations': [
        models.ShareInstanceExportLocations,
    ],
    'access_rules_status': 'in_sync',
    'share_network_id': '4ccd5318-65f1-11e5-9d70-feff819cdc9f',
    'share_server_id': '4ce78e7b-0ef6-4730-ac2a-fd2defefbd05',
}

Parameters:	replica_snapshots – List of dictionaries of snapshot instances. These snapshot instances track the snapshot across the replicas. This will include the snapshot instance being updated as well.

Example:

 [
    {
    'id': 'd3931a93-3984-421e-a9e7-d9f71895450a',
    'snapshot_id': '13ee5cb5-fc53-4539-9431-d983b56c5c40',
        ...
    },
    {
    'id': '8bda791c-7bb6-4e7b-9b64-fefff85ff13e',
    'snapshot_id': '13ee5cb5-fc53-4539-9431-d983b56c5c40',
        ...
    },
    ...
]

Parameters:	replica_snapshot – Dictionary of the snapshot instance. This is the instance to be updated. It will be in ‘creating’ or ‘deleting’ state when sent via this parameter.

Example:

{
    'name': 'share-snapshot-18825630-574f-4912-93bb-af4611ef35a2',
    'share_id': 'd487b88d-e428-4230-a465-a800c2cce5f8',
    'share_name': 'share-d487b88d-e428-4230-a465-a800c2cce5f8',
    'status': 'creating',
    'id': '18825630-574f-4912-93bb-af4611ef35a2',
    'deleted': False,
    'created_at': datetime.datetime(2016, 8, 3, 0, 5, 58),
    'share': <models.ShareInstance>,
    'updated_at': datetime.datetime(2016, 8, 3, 0, 5, 58),
    'share_instance_id': 'd487b88d-e428-4230-a465-a800c2cce5f8',
    'snapshot_id': '13ee5cb5-fc53-4539-9431-d983b56c5c40',
    'progress': '0%',
    'deleted_at': None,
    'provider_location': None,
}

Parameters:	share_server – <models.ShareServer> or None
Returns:	replica_snapshot_model_update: a dictionary. The dictionary must contain values that need to be updated on the database for the snapshot instance that represents the snapshot on the replica.
Raises:	exception.SnapshotResourceNotFound Raise this exception for snapshots that are not found on the backend and their status was ‘deleting’.