Tiny machines fail on Havana

[Liam Young]

I have a fresh install of Havana on precise. Creating a m1.tiny fails but a m1.small succeeds.

The m1.tniy fails with:
| fault | {u'message': u'No valid host was found. Exceeded max scheduling attempts 3 for instance 22d88956-7a77-4f0a-95ae-946f19264fdc', u'code': 500, u'details': u' File "/usr/lib/python2.7/dist-packages/nova/scheduler/manager.py", line 147, in run_instance |
  legacy_bdm_in_spec) |
File "/usr/lib/python2.7/dist-packages/nova/scheduler/filter_scheduler.py", line 85, in schedule_run_instance |
  filter_properties, instance_uuids) |
File "/usr/lib/python2.7/dist-packages/nova/scheduler/filter_scheduler.py", line 306, in _schedule|
  self._populate_retry(filter_properties, properties)|
File "/usr/lib/python2.7/dist-packages/nova/scheduler/filter_scheduler.py", line 275, in _populate_retry|
  raise exception.NoValidHost(reason=msg)|

[Guangya Liu (Jay Lau) (jay-lau-513)]

Hi Liam, please turn on nova-scheduler/nova-compute debug log and run the test case again. If encounter this again, please append scheduler log here.

The reason you encounter this issue is that retryFilter was enabled by default and nova scheduler try to create VMs with m1.tiny for 3 times (max retry time) but all failed, so above error was thrown out.

[Guangya Liu (Jay Lau) (jay-lau-513)]

I think we need find out "why tiny machines fails", waiting for Liam's further input. Thanks.

[Davanum Srinivas (DIMS) (dims-v)]

Some more details in https://bugs.launchpad.net/nova/+bug/1245276

[Shannon McFarland (shmcfarl)]

I am having the same issue on multiple nodes/deployments. It happens only with precise and only with m1.tiny. I have added the log files as attachments.