[Bug 1495788] [NEW] nova: use UUIDs instead of instance names

[Martin Pitt]

Public bug reported:

With the recent introduction of triggering one test per reverse-
dependency kernel image, or in situations where a particular package
just happens to be in the queue more than once, we can potentially get
naming collisions. From http://autopkgtest.ubuntu.com/packages/n/nvidia-
graphics-drivers-304/wily/amd64/ I just saw:

| 2b419580-ac4c-4b94-a4dc-47e8ee5612e9 | adt-wily-amd64-nvidia-graphics-drivers-304-20150914-155306 | ACTIVE | -          | Running     | net_ues_proposed_migration=10.220.47.70 |
| 80a56c66-cbb0-4cd4-8488-16fb937c9ffb | adt-wily-amd64-nvidia-graphics-drivers-304-20150914-155306 | ACTIVE | -          | Running     | net_ues_proposed_migration=10.220.47.69 |

which led to

nova boot failed (attempt #1):
ERROR: Quota exceeded for instances: Requested 1, but already used 10 of 10 instances (HTTP 413) (Request-ID: req-5540e478-1305-4a54-93c0-2869e084a437)
ERROR: Multiple server matches found for 'adt-wily-amd64-nvidia-graphics-drivers-304-20150914-155306', use an ID to be more specific.
ERROR: Unable to delete any of the specified servers.

We need to use the instance's UUID instead of its name to avoid this.

** Affects: autopkgtest (Ubuntu)
     Importance: High
     Assignee: Martin Pitt (pitti)
         Status: In Progress

** Changed in: autopkgtest (Ubuntu)
       Status: New => In Progress

** Changed in: autopkgtest (Ubuntu)
   Importance: Undecided => High

** Changed in: autopkgtest (Ubuntu)
     Assignee: (unassigned) => Martin Pitt (pitti)

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https://bugs.launchpad.net/bugs/1495788

Title:
  nova: use UUIDs instead of instance names

Status in autopkgtest package in Ubuntu:
  In Progress

Bug description:
  With the recent introduction of triggering one test per reverse-
  dependency kernel image, or in situations where a particular package
  just happens to be in the queue more than once, we can potentially get
  naming collisions. From http://autopkgtest.ubuntu.com/packages/n
  /nvidia-graphics-drivers-304/wily/amd64/ I just saw:

  | 2b419580-ac4c-4b94-a4dc-47e8ee5612e9 | adt-wily-amd64-nvidia-graphics-drivers-304-20150914-155306 | ACTIVE | -          | Running     | net_ues_proposed_migration=10.220.47.70 |
  | 80a56c66-cbb0-4cd4-8488-16fb937c9ffb | adt-wily-amd64-nvidia-graphics-drivers-304-20150914-155306 | ACTIVE | -          | Running     | net_ues_proposed_migration=10.220.47.69 |

  which led to

  nova boot failed (attempt #1):
  ERROR: Quota exceeded for instances: Requested 1, but already used 10 of 10 instances (HTTP 413) (Request-ID: req-5540e478-1305-4a54-93c0-2869e084a437)
  ERROR: Multiple server matches found for 'adt-wily-amd64-nvidia-graphics-drivers-304-20150914-155306', use an ID to be more specific.
  ERROR: Unable to delete any of the specified servers.

  We need to use the instance's UUID instead of its name to avoid this.

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