no-vaild-host-found-due-to-nova-error-devstack

[Devdatta Kulkarni]

Getting "No valid host found" error in devstack when deploying application DU.

Possible reason could be following error which is showing up in "nova-cpu" screen.

_available_resource from (pid=6039) run_periodic_tasks /usr/local/lib/python2.7/dist-packages/oslo_service/periodic_task.py:213
2015-10-02 17:13:00.035 ERROR nova.compute.manager [req-c72f8e91-e7ab-459e-988c-552d3603db61 None None] No compute node record for host devstack
2015-10-02 17:13:00.036 INFO nova.compute.resource_tracker [req-c72f8e91-e7ab-459e-988c-552d3603db61 None None] Auditing locally available compute resources for node devstack
2015-10-02 17:13:00.040 ERROR nova.compute.manager [req-c72f8e91-e7ab-459e-988c-552d3603db61 None None] Error updating resources for node devstack: Invalid input received: Missing keys: ['numa_topology']

[Devdatta Kulkarni (devdatta-kulkarni)]

On n-cond screen, seeing this stack trace:

2015-10-02 17:10:45.106 WARNING nova.scheduler.utils [req-bf920d82-5969-491a-b4c8-05f7af4a3623 demo demo] [instance: 5b24718e-be3d-4169-9e1e-198055300e5b] Setting instance to ERROR state.
2015-10-02 17:11:21.530 WARNING nova.scheduler.utils [req-e8f9166f-bee1-427e-af15-0b11523f3b92 demo demo] Failed to compute_task_build_instances: No valid host was found. There are not enough hosts available.
Traceback (most recent call last):

  File "/usr/local/lib/python2.7/dist-packages/oslo_messaging/rpc/server.py", line 142, in inner
    return func(*args, **kwargs)

  File "/opt/stack/nova/nova/scheduler/manager.py", line 84, in select_destinations
    filter_properties)

  File "/opt/stack/nova/nova/scheduler/filter_scheduler.py", line 90, in select_destinations
    raise exception.NoValidHost(reason=reason)

NoValidHost: No valid host was found. There are not enough hosts available.

2015-10-02 17:11:21.531 WARNING nova.scheduler.utils [req-e8f9166f-bee1-427e-af15-0b11523f3b92 demo demo] [instance: 4b8a6de9-a3bb-4e22-833e-bd6392d63c86] Setting instance to ERROR state.

[Devdatta Kulkarni (devdatta-kulkarni)]

One approach to get around this issue is to use AllHostsFilter for Nova's scheduler_filter parameter.

The steps outlined here don't seem to lead to this issue.

https://github.com/devdattakulkarni/solum-provenance/blob/master/steps-to-enable-solum-with-devstack

So marking this as 'Invalid'.