root / snf-cyclades-app / synnefo / volume / snapshots.py @ 19b2c29d
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1 | 79a1e9bd | Christos Stavrakakis | import datetime |
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2 | 79a1e9bd | Christos Stavrakakis | from django.utils import simplejson as json |
3 | 79a1e9bd | Christos Stavrakakis | from django.db import transaction |
4 | 79a1e9bd | Christos Stavrakakis | from snf_django.lib.api import faults |
5 | 79a1e9bd | Christos Stavrakakis | from snf_django.lib.api.utils import isoformat |
6 | 79a1e9bd | Christos Stavrakakis | from synnefo.plankton.utils import image_backend |
7 | 79a1e9bd | Christos Stavrakakis | from synnefo.logic import backend |
8 | 79a1e9bd | Christos Stavrakakis | from synnefo.volume import util |
9 | 79a1e9bd | Christos Stavrakakis | |
10 | 79a1e9bd | Christos Stavrakakis | SNAPSHOTS_CONTAINER = "snapshots"
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11 | 79a1e9bd | Christos Stavrakakis | SNAPSHOTS_DOMAIN = "plankton"
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12 | 79a1e9bd | Christos Stavrakakis | SNAPSHOTS_PREFIX = "plankton:"
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13 | 79a1e9bd | Christos Stavrakakis | SNAPSHOTS_TYPE = "application/octet-stream"
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14 | 79a1e9bd | Christos Stavrakakis | SNAPSHOTS_MAPFILE_PREFIX = "archip:"
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15 | 79a1e9bd | Christos Stavrakakis | |
16 | 79a1e9bd | Christos Stavrakakis | |
17 | 79a1e9bd | Christos Stavrakakis | @transaction.commit_on_success
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18 | 79a1e9bd | Christos Stavrakakis | def create(user_id, volume, name, description, metadata, force=False): |
19 | 79a1e9bd | Christos Stavrakakis | |
20 | 79a1e9bd | Christos Stavrakakis | if volume.machine is None: |
21 | 79a1e9bd | Christos Stavrakakis | raise faults.BadRequest("Can not snapshot detached volume!") |
22 | 79a1e9bd | Christos Stavrakakis | |
23 | 8e057ed0 | Christos Stavrakakis | flavor = volume.machine.flavor |
24 | 8e057ed0 | Christos Stavrakakis | if not flavor.disk_template.startswith("ext_"): |
25 | 8e057ed0 | Christos Stavrakakis | msg = ("Snapshots are supported only for volumes of ext_*"
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26 | 8e057ed0 | Christos Stavrakakis | " disk template")
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27 | 8e057ed0 | Christos Stavrakakis | raise faults.BadRequest(msg)
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28 | 8e057ed0 | Christos Stavrakakis | |
29 | 79a1e9bd | Christos Stavrakakis | volume.snapshot_counter += 1
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30 | 79a1e9bd | Christos Stavrakakis | volume.save() |
31 | 4944a1f8 | Christos Stavrakakis | transaction.commit() |
32 | 79a1e9bd | Christos Stavrakakis | |
33 | 79a1e9bd | Christos Stavrakakis | snapshot_metadata = {} |
34 | 4944a1f8 | Christos Stavrakakis | snapshot_metadata[SNAPSHOTS_PREFIX + "name"] = name
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35 | 79a1e9bd | Christos Stavrakakis | snapshot_metadata[SNAPSHOTS_PREFIX + "description"] = description
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36 | 79a1e9bd | Christos Stavrakakis | snapshot_metadata[SNAPSHOTS_PREFIX + "metadata"] = json.dumps(metadata)
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37 | 79a1e9bd | Christos Stavrakakis | snapshot_metadata[SNAPSHOTS_PREFIX + "volume_id"] = volume.id
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38 | 79a1e9bd | Christos Stavrakakis | snapshot_metadata[SNAPSHOTS_PREFIX + "status"] = "CREATING" |
39 | 79a1e9bd | Christos Stavrakakis | #XXX: just to work
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40 | 79a1e9bd | Christos Stavrakakis | snapshot_metadata[SNAPSHOTS_PREFIX + "is_snapshot"] = True |
41 | 4944a1f8 | Christos Stavrakakis | #XXX: for images
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42 | 4944a1f8 | Christos Stavrakakis | snapshot_metadata[SNAPSHOTS_PREFIX + "store"] = "pithos" |
43 | 4944a1f8 | Christos Stavrakakis | snapshot_metadata[SNAPSHOTS_PREFIX + "disk_format"] = "diskdump" |
44 | 4944a1f8 | Christos Stavrakakis | snapshot_metadata[SNAPSHOTS_PREFIX + "default_container_format"] = "bare" |
45 | 4944a1f8 | Christos Stavrakakis | # XXX: Hack-ish way to clone the metadata
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46 | 4944a1f8 | Christos Stavrakakis | image_properties = {"EXCLUDE_ALL_TASKS": "yes", |
47 | 4944a1f8 | Christos Stavrakakis | "description": description}
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48 | 4944a1f8 | Christos Stavrakakis | vm_metadata = dict(volume.machine.metadata.values_list("meta_key", "meta_value")) |
49 | 4944a1f8 | Christos Stavrakakis | for key in ["OS", "users"]: |
50 | 4944a1f8 | Christos Stavrakakis | val = vm_metadata.get(key) |
51 | 4944a1f8 | Christos Stavrakakis | if val is not None: |
52 | 4944a1f8 | Christos Stavrakakis | image_properties[key] = val |
53 | 4944a1f8 | Christos Stavrakakis | snapshot_metadata[SNAPSHOTS_PREFIX + "properties"] = json.dumps(image_properties)
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54 | 79a1e9bd | Christos Stavrakakis | |
55 | 79a1e9bd | Christos Stavrakakis | snapshot_name = generate_snapshot_name(volume) |
56 | 79a1e9bd | Christos Stavrakakis | mapfile = SNAPSHOTS_MAPFILE_PREFIX + snapshot_name |
57 | 79a1e9bd | Christos Stavrakakis | |
58 | 4944a1f8 | Christos Stavrakakis | size = volume.size << 30
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59 | 79a1e9bd | Christos Stavrakakis | with image_backend(user_id) as pithos_backend: |
60 | 79a1e9bd | Christos Stavrakakis | # move this to plankton backend
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61 | 79a1e9bd | Christos Stavrakakis | snapshot_uuid = pithos_backend.backend.register_object_map( |
62 | 79a1e9bd | Christos Stavrakakis | user=user_id, |
63 | 79a1e9bd | Christos Stavrakakis | account=user_id, |
64 | 79a1e9bd | Christos Stavrakakis | container=SNAPSHOTS_CONTAINER, |
65 | 4944a1f8 | Christos Stavrakakis | name=snapshot_name, |
66 | 4944a1f8 | Christos Stavrakakis | size=size, |
67 | 4944a1f8 | Christos Stavrakakis | domain=SNAPSHOTS_DOMAIN, |
68 | 79a1e9bd | Christos Stavrakakis | type=SNAPSHOTS_TYPE, |
69 | 79a1e9bd | Christos Stavrakakis | mapfile=mapfile, |
70 | 79a1e9bd | Christos Stavrakakis | meta=snapshot_metadata, |
71 | 4944a1f8 | Christos Stavrakakis | replace_meta=True,
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72 | 79a1e9bd | Christos Stavrakakis | permissions=None)
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73 | 79a1e9bd | Christos Stavrakakis | #checksum=None,
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74 | 79a1e9bd | Christos Stavrakakis | |
75 | 4944a1f8 | Christos Stavrakakis | backend.snapshot_instance(volume.machine, snapshot_name=snapshot_name) |
76 | 79a1e9bd | Christos Stavrakakis | |
77 | 79a1e9bd | Christos Stavrakakis | snapshot = util.get_snapshot(user_id, snapshot_uuid) |
78 | 79a1e9bd | Christos Stavrakakis | |
79 | 79a1e9bd | Christos Stavrakakis | return snapshot
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80 | 79a1e9bd | Christos Stavrakakis | |
81 | 79a1e9bd | Christos Stavrakakis | |
82 | 79a1e9bd | Christos Stavrakakis | def generate_snapshot_name(volume): |
83 | 79a1e9bd | Christos Stavrakakis | time = isoformat(datetime.datetime.now()) |
84 | 4944a1f8 | Christos Stavrakakis | return "snf-snapshot-of-volume-%s-%s" % (volume.id, |
85 | 4944a1f8 | Christos Stavrakakis | volume.snapshot_counter) |
86 | 79a1e9bd | Christos Stavrakakis | |
87 | 79a1e9bd | Christos Stavrakakis | |
88 | 79a1e9bd | Christos Stavrakakis | @transaction.commit_on_success
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89 | 79a1e9bd | Christos Stavrakakis | def delete(snapshot): |
90 | 79a1e9bd | Christos Stavrakakis | user_id = snapshot["owner"]
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91 | 79a1e9bd | Christos Stavrakakis | with image_backend(user_id) as pithos_backend: |
92 | 79a1e9bd | Christos Stavrakakis | pithos_backend.delete_snapshot(snapshot["uuid"])
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93 | 79a1e9bd | Christos Stavrakakis | return snapshot |