root / snf-cyclades-app / synnefo / logic / management / commands / backend-remove.py @ a6e6fe48
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1 | a6e6fe48 | Christos Stavrakakis | # Copyright 2011-2014 GRNET S.A. All rights reserved.
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2 | 3f52dd82 | Christos Stavrakakis | #
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3 | 3f52dd82 | Christos Stavrakakis | # Redistribution and use in source and binary forms, with or without
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4 | 3f52dd82 | Christos Stavrakakis | # modification, are permitted provided that the following conditions
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5 | 3f52dd82 | Christos Stavrakakis | # are met:
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6 | 3f52dd82 | Christos Stavrakakis | #
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7 | 3f52dd82 | Christos Stavrakakis | # 1. Redistributions of source code must retain the above copyright
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8 | 3f52dd82 | Christos Stavrakakis | # notice, this list of conditions and the following disclaimer.
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9 | 3f52dd82 | Christos Stavrakakis | #
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10 | 3f52dd82 | Christos Stavrakakis | # 2. Redistributions in binary form must reproduce the above copyright
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11 | 3f52dd82 | Christos Stavrakakis | # notice, this list of conditions and the following disclaimer in the
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12 | 3f52dd82 | Christos Stavrakakis | # documentation and/or other materials provided with the distribution.
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13 | 3f52dd82 | Christos Stavrakakis | #
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14 | 3f52dd82 | Christos Stavrakakis | # THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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15 | 3f52dd82 | Christos Stavrakakis | # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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16 | 3f52dd82 | Christos Stavrakakis | # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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17 | 3f52dd82 | Christos Stavrakakis | # ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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18 | 3f52dd82 | Christos Stavrakakis | # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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19 | 3f52dd82 | Christos Stavrakakis | # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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20 | 3f52dd82 | Christos Stavrakakis | # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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21 | 3f52dd82 | Christos Stavrakakis | # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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22 | 3f52dd82 | Christos Stavrakakis | # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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23 | 3f52dd82 | Christos Stavrakakis | # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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24 | 3f52dd82 | Christos Stavrakakis | # SUCH DAMAGE.
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25 | 3f52dd82 | Christos Stavrakakis | #
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26 | 3f52dd82 | Christos Stavrakakis | # The views and conclusions contained in the software and documentation are
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27 | 3f52dd82 | Christos Stavrakakis | # those of the authors and should not be interpreted as representing official
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28 | 3f52dd82 | Christos Stavrakakis | # policies, either expressed or implied, of GRNET S.A.
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29 | 3f52dd82 | Christos Stavrakakis | #
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30 | 3f52dd82 | Christos Stavrakakis | |
31 | 3f52dd82 | Christos Stavrakakis | from django.core.management.base import BaseCommand, CommandError |
32 | a6e6fe48 | Christos Stavrakakis | from synnefo.management import common |
33 | 26515bc1 | Christos Stavrakakis | from synnefo.logic import backend as backend_mod |
34 | 26515bc1 | Christos Stavrakakis | from synnefo.db.models import Backend |
35 | 26515bc1 | Christos Stavrakakis | from django.db import transaction, models |
36 | 3f52dd82 | Christos Stavrakakis | |
37 | 3f52dd82 | Christos Stavrakakis | |
38 | 26515bc1 | Christos Stavrakakis | HELP_MSG = """\
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39 | 26515bc1 | Christos Stavrakakis | Remove a backend from the Database. Backend should be set to drained before
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40 | 26515bc1 | Christos Stavrakakis | trying to remove it, in order to avoid the allocation of a new instances in
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41 | 26515bc1 | Christos Stavrakakis | this Backend. Removal of a backend will fail if the backend hosts any
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42 | 26515bc1 | Christos Stavrakakis | non-deleted instances."""
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43 | 3f52dd82 | Christos Stavrakakis | |
44 | 3f52dd82 | Christos Stavrakakis | |
45 | 26515bc1 | Christos Stavrakakis | class Command(BaseCommand): |
46 | 26515bc1 | Christos Stavrakakis | help = HELP_MSG |
47 | 3f52dd82 | Christos Stavrakakis | |
48 | 3f52dd82 | Christos Stavrakakis | def handle(self, *args, **options): |
49 | cc92b70f | Christos Stavrakakis | write = self.stdout.write
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50 | 3f52dd82 | Christos Stavrakakis | if len(args) < 1: |
51 | 3f52dd82 | Christos Stavrakakis | raise CommandError("Please provide a backend ID") |
52 | 3f52dd82 | Christos Stavrakakis | |
53 | a6e6fe48 | Christos Stavrakakis | backend = common.get_resource("backend", args[0], for_update=True) |
54 | 3f52dd82 | Christos Stavrakakis | |
55 | 26515bc1 | Christos Stavrakakis | write("Trying to remove backend: %s\n" % backend.clustername)
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56 | 3f52dd82 | Christos Stavrakakis | |
57 | 26515bc1 | Christos Stavrakakis | if backend.virtual_machines.filter(deleted=False).exists(): |
58 | 8d5795b4 | Christos Stavrakakis | raise CommandError('Backend hosts non-deleted vms. Cannot delete') |
59 | 3f52dd82 | Christos Stavrakakis | |
60 | 26515bc1 | Christos Stavrakakis | # Get networks before deleting backend, because after deleting the
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61 | 26515bc1 | Christos Stavrakakis | # backend, all BackendNetwork objects are deleted!
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62 | 26515bc1 | Christos Stavrakakis | networks = [bn.network for bn in backend.networks.all()] |
63 | 3f52dd82 | Christos Stavrakakis | |
64 | 26515bc1 | Christos Stavrakakis | try:
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65 | 26515bc1 | Christos Stavrakakis | delete_backend(backend) |
66 | 26515bc1 | Christos Stavrakakis | except models.ProtectedError as e: |
67 | 8d5795b4 | Christos Stavrakakis | msg = ("Cannot delete backend because it contains"
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68 | 26515bc1 | Christos Stavrakakis | "non-deleted VMs:\n%s" % e)
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69 | 26515bc1 | Christos Stavrakakis | raise CommandError(msg)
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70 | 3f52dd82 | Christos Stavrakakis | |
71 | 26515bc1 | Christos Stavrakakis | write('Successfully removed backend from DB.\n')
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72 | 3f52dd82 | Christos Stavrakakis | |
73 | 3f52dd82 | Christos Stavrakakis | if networks:
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74 | 26515bc1 | Christos Stavrakakis | write("Clearing networks from %s..\n" % backend.clustername)
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75 | 26515bc1 | Christos Stavrakakis | for network in networks: |
76 | 26515bc1 | Christos Stavrakakis | backend_mod.delete_network(network=network, backend=backend) |
77 | 26515bc1 | Christos Stavrakakis | write("Successfully issued jobs to remove all networks.\n")
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78 | 26515bc1 | Christos Stavrakakis | |
79 | 26515bc1 | Christos Stavrakakis | |
80 | 26515bc1 | Christos Stavrakakis | @transaction.commit_on_success
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81 | 26515bc1 | Christos Stavrakakis | def delete_backend(backend): |
82 | 26515bc1 | Christos Stavrakakis | # Get X-Lock
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83 | 26515bc1 | Christos Stavrakakis | backend = Backend.objects.select_for_update().get(id=backend.id) |
84 | 26515bc1 | Christos Stavrakakis | # Clear 'backend' field of 'deleted' VirtualMachines
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85 | 26515bc1 | Christos Stavrakakis | backend.virtual_machines.filter(deleted=True).update(backend=None) |
86 | 26515bc1 | Christos Stavrakakis | # Delete all BackendNetwork objects of this backend
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87 | 26515bc1 | Christos Stavrakakis | backend.networks.all().delete() |
88 | 26515bc1 | Christos Stavrakakis | backend.delete() |