Revision 5d805533 snf-cyclades-app/synnefo/volume/volumes.py
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import logging |
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from django.db import transaction |
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from synnefo.db.models import Volume |
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from snf_django.lib.api import faults |
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from synnefo.db.models import Volume |
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from synnefo.volume import util |
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from synnefo.logic import backend, servers
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from synnefo.logic import server_attachments
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log = logging.getLogger(__name__) |
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| ... | ... | |
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source_volume_id=None, source_snapshot_id=None, |
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source_image_id=None, metadata=None): |
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# Currently we cannot create volumes without being attached to a server |
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if server_id is None: |
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raise faults.BadRequest("Volume must be attached to server")
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server = util.get_server(user_id, server_id, for_update=True, |
| ... | ... | |
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if len(sources) > 1: |
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raise faults.BadRequest("Volume can not have more than one source!")
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# Only ext_ disk template supports cloning from another source |
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if source_volume_id is not None: |
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source_type = "volume" |
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source_uuid = source_volume_id |
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elif source_snapshot_id is not None: |
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source_type = "snapshot" |
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source_uuid = source_snapshot_id |
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elif source_image_id is not None: |
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source_type = "image" |
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source_uuid = source_image_id |
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else: |
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source_type = source_uuid = None |
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volume = _create_volume(server, user_id, size, source_type, source_uuid, |
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name, description, index=None) |
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if metadata is not None: |
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for meta_key, meta_val in metadata.items(): |
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volume.metadata.create(key=meta_key, value=meta_val) |
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server_attachments.attach_volume(server, volume) |
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return volume |
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def _create_volume(server, user_id, size, source_type, source_uuid, |
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name=None, description=None, index=None, |
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delete_on_termination=True): |
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# Only ext_ disk template supports cloning from another source. Otherwise |
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# is must be the root volume so that 'snf-image' fill the volume |
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disk_template = server.flavor.disk_template |
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if not disk_template.startswith("ext_") and sources:
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can_have_source = (index == 0 or disk_template.startswith("ext_"))
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if not can_have_source and source_type != "blank": |
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msg = ("Volumes of '%s' disk template cannot have a source" %
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disk_template) |
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raise faults.BadRequest(msg) |
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origin = None |
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source = None |
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if source_volume_id is not None: |
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source_volume = util.get_volume(user_id, source_volume_id, |
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# TODO: Check Volume/Snapshot Status |
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if source_type == "volume": |
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source_volume = util.get_volume(user_id, source_uuid, |
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for_update=True, |
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exception=faults.BadRequest) |
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# Check that volume is ready to be snapshotted |
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if source_volume.status != "AVAILABLE": |
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msg = ("Cannot take a snapshot while snapshot is in '%s' state"
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% source_volume.status) |
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raise faults.BadRequest(msg) |
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source = Volume.prefix_source(source_volume_id, source_type="volume") |
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if source_volume.status != "IN_USE": |
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raise faults.BadRequest("Cannot clone volume while it is in '%s'"
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" status" % source_volume.status) |
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# If no size is specified, use the size of the volume |
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if size is None: |
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size = source_volume.size |
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elif size < source_volume.size: |
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raise faults.BadRequest("Volume size cannot be smaller than the"
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" source volume") |
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source = Volume.prefix_source(source_uuid, source_type="volume") |
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origin = source_volume.backend_volume_uuid |
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elif source_snapshot_id is not None:
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source_snapshot = util.get_snapshot(user_id, source_snapshot_id,
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elif source_type == "snapshot":
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source_snapshot = util.get_snapshot(user_id, source_uuid,
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exception=faults.BadRequest) |
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# TODO: Check the state of the snapshot!! |
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source = Volume.prefix_source(source_snapshot_id, |
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source = Volume.prefix_source(source_uuid, |
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source_type="snapshot") |
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if size is None: |
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raise faults.BadRequest("Volume size is required")
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elif (size << 30) < int(source_snapshot["size"]): |
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raise faults.BadRequest("Volume size '%s' is smaller than"
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" snapshot's size '%s'" |
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% (size << 30, source_snapshot["size"])) |
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origin = source_snapshot["checksum"] |
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elif source_image_id is not None:
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source_image = util.get_image(user_id, source_image_id,
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elif source_type == "image":
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source_image = util.get_image(user_id, source_uuid,
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exception=faults.BadRequest) |
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source = Volume.prefix_source(source_image_id, source_type="image") |
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if size is None: |
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raise faults.BadRequest("Volume size is required")
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elif (size << 30) < int(source_image["size"]): |
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raise faults.BadRequest("Volume size '%s' is smaller than"
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" image's size '%s'" |
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% (size << 30, source_image["size"])) |
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source = Volume.prefix_source(source_uuid, source_type="image") |
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origin = source_image["checksum"] |
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elif source_type == "blank": |
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if size is None: |
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raise faults.BadRequest("Volume size is required")
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source = origin = None |
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else: |
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raise faults.BadRequest("Unknwon source type")
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volume = Volume.objects.create(userid=user_id, |
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size=size, |
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name=name, |
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machine=server, |
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description=description, |
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delete_on_termination=delete_on_termination, |
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source=source, |
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origin=origin, |
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#volume_type=volume_type, |
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status="CREATING") |
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if metadata is not None: |
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for meta_key, meta_val in metadata.items(): |
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volume.metadata.create(key=meta_key, value=meta_val) |
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servers.attach_volume(server, volume) |
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return volume |
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|
| ... | ... | |
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# A volume is deleted by detaching it from the server that is attached. |
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# Deleting a detached volume is not implemented. |
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if volume.machine_id is not None: |
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servers.detach_volume(volume.machine, volume) |
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server_attachments.detach_volume(volume.machine, volume)
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log.info("Detach volume '%s' from server '%s', job: %s",
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volume.id, volume.machine_id, volume.backendjobid) |
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else: |
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