root / snf-cyclades-app / synnefo / logic / utils.py @ 567ffb85
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1 | 48130e66 | Georgios Gousios | # Copyright 2011 GRNET S.A. All rights reserved.
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2 | 8d97deff | Vassilios Karakoidas | #
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3 | 48130e66 | Georgios Gousios | # Redistribution and use in source and binary forms, with or without
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4 | 48130e66 | Georgios Gousios | # modification, are permitted provided that the following conditions
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5 | 48130e66 | Georgios Gousios | # are met:
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6 | 48130e66 | Georgios Gousios | #
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7 | 48130e66 | Georgios Gousios | # 1. Redistributions of source code must retain the above copyright
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8 | 48130e66 | Georgios Gousios | # notice, this list of conditions and the following disclaimer.
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9 | 8d97deff | Vassilios Karakoidas | #
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10 | 48130e66 | Georgios Gousios | # 2. Redistributions in binary form must reproduce the above copyright
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11 | 48130e66 | Georgios Gousios | # notice, this list of conditions and the following disclaimer in the
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12 | 48130e66 | Georgios Gousios | # documentation and/or other materials provided with the distribution.
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13 | 8d97deff | Vassilios Karakoidas | #
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14 | 48130e66 | Georgios Gousios | # THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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15 | 48130e66 | Georgios Gousios | # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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16 | 48130e66 | Georgios Gousios | # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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17 | 48130e66 | Georgios Gousios | # ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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18 | 48130e66 | Georgios Gousios | # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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19 | 48130e66 | Georgios Gousios | # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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20 | 48130e66 | Georgios Gousios | # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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21 | 48130e66 | Georgios Gousios | # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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22 | 48130e66 | Georgios Gousios | # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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23 | 48130e66 | Georgios Gousios | # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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24 | 48130e66 | Georgios Gousios | # SUCH DAMAGE.
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25 | 8d97deff | Vassilios Karakoidas | #
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26 | 48130e66 | Georgios Gousios | # The views and conclusions contained in the software and documentation are
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27 | 48130e66 | Georgios Gousios | # those of the authors and should not be interpreted as representing official
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28 | 48130e66 | Georgios Gousios | # policies, either expressed or implied, of GRNET S.A.
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29 | 48130e66 | Georgios Gousios | |
30 | 48130e66 | Georgios Gousios | # Utility functions
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31 | 8d97deff | Vassilios Karakoidas | |
32 | 234f8b07 | Vangelis Koukis | from synnefo.db.models import VirtualMachine |
33 | 8d97deff | Vassilios Karakoidas | |
34 | 6efeecee | Faidon Liambotis | from django.conf import settings |
35 | 8d97deff | Vassilios Karakoidas | |
36 | 8d97deff | Vassilios Karakoidas | def id_from_instance_name(name): |
37 | 8d97deff | Vassilios Karakoidas | """Returns VirtualMachine's Django id, given a ganeti machine name.
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38 | 8d97deff | Vassilios Karakoidas |
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39 | 8d97deff | Vassilios Karakoidas | Strips the ganeti prefix atm. Needs a better name!
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40 | 8d97deff | Vassilios Karakoidas |
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41 | 8d97deff | Vassilios Karakoidas | """
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42 | 8d97deff | Vassilios Karakoidas | if not str(name).startswith(settings.BACKEND_PREFIX_ID): |
43 | 8d97deff | Vassilios Karakoidas | raise VirtualMachine.InvalidBackendIdError(str(name)) |
44 | f16c6944 | Kostas Papadimitriou | ns = str(name).replace(settings.BACKEND_PREFIX_ID, "", 1) |
45 | 8d97deff | Vassilios Karakoidas | if not ns.isdigit(): |
46 | 8d97deff | Vassilios Karakoidas | raise VirtualMachine.InvalidBackendIdError(str(name)) |
47 | 8d97deff | Vassilios Karakoidas | |
48 | 8d97deff | Vassilios Karakoidas | return int(ns) |
49 | 8d97deff | Vassilios Karakoidas | |
50 | 8d97deff | Vassilios Karakoidas | def get_rsapi_state(vm): |
51 | fc30c430 | Vangelis Koukis | """Returns the API state for a virtual machine
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52 | f16c6944 | Kostas Papadimitriou |
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53 | fc30c430 | Vangelis Koukis | The API state for an instance of VirtualMachine is derived as follows:
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54 | fc30c430 | Vangelis Koukis |
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55 | fc30c430 | Vangelis Koukis | * If the deleted flag has been set, it is "DELETED".
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56 | fc30c430 | Vangelis Koukis | * Otherwise, it is a mapping of the last state reported by Ganeti
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57 | fc30c430 | Vangelis Koukis | (vm.operstate) through the RSAPI_STATE_FROM_OPER_STATE dictionary.
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58 | f16c6944 | Kostas Papadimitriou |
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59 | fc30c430 | Vangelis Koukis | The last state reported by Ganeti is set whenever Ganeti reports
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60 | fc30c430 | Vangelis Koukis | successful completion of an operation. If Ganeti says an OP_INSTANCE_STARTUP
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61 | fc30c430 | Vangelis Koukis | operation succeeded, vm.operstate is set to "STARTED".
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62 | fc30c430 | Vangelis Koukis |
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63 | 7e8b41e7 | Vangelis Koukis | * To support any transitional states defined by the API (only REBOOT for the time
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64 | fc30c430 | Vangelis Koukis | being) this mapping is amended with information reported by Ganeti regarding
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65 | fc30c430 | Vangelis Koukis | any outstanding operation. If an OP_INSTANCE_STARTUP had succeeded previously
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66 | fc30c430 | Vangelis Koukis | and an OP_INSTANCE_REBOOT has been reported as in progress, the API state is
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67 | fc30c430 | Vangelis Koukis | "REBOOT".
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68 | fc30c430 | Vangelis Koukis |
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69 | fc30c430 | Vangelis Koukis | """
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70 | 8d97deff | Vassilios Karakoidas | try:
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71 | dfd19c2d | Vassilios Karakoidas | r = VirtualMachine.RSAPI_STATE_FROM_OPER_STATE[vm.operstate] |
72 | 8d97deff | Vassilios Karakoidas | except KeyError: |
73 | 8d97deff | Vassilios Karakoidas | return "UNKNOWN" |
74 | 685b219e | Vangelis Koukis | # A machine is DELETED if the deleted flag has been set
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75 | 685b219e | Vangelis Koukis | if vm.deleted:
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76 | 685b219e | Vangelis Koukis | return "DELETED" |
77 | 8d97deff | Vassilios Karakoidas | # A machine is in REBOOT if an OP_INSTANCE_REBOOT request is in progress
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78 | dfd19c2d | Vassilios Karakoidas | if r == 'ACTIVE' and vm.backendopcode == 'OP_INSTANCE_REBOOT' and \ |
79 | fb381fbe | Markos Gogoulos | vm.backendjobstatus in ('queued', 'waiting', 'running'): |
80 | 8d97deff | Vassilios Karakoidas | return "REBOOT" |
81 | 8d97deff | Vassilios Karakoidas | return r
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82 | 8d97deff | Vassilios Karakoidas | |
83 | dfd19c2d | Vassilios Karakoidas | def update_state(vm, new_operstate): |
84 | dfd19c2d | Vassilios Karakoidas | """Wrapper around updates of the VirtualMachine.operstate field"""
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85 | 8d97deff | Vassilios Karakoidas | |
86 | dfd19c2d | Vassilios Karakoidas | vm.operstate = new_operstate |