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[Openstack] [nova] Log files on exceeding cpu allocation limit


Hi Jay,

Thank you for getting back. I attached the log in my previous reply,
but I guess Gmail hided it from you as a quoted message. Here comes
again:

>From nova-conductor.log
### BEGIN ###
2018-08-08 09:28:35.974 1648 ERROR nova.conductor.manager
[req-ef0d8ea1-e801-483e-b913-9148a6ac5d90
2499343cbc7a4ca5a7f14c43f9d9c229 3850596606b7459d8802a72516991a19 -
default default] Failed to schedule instances: NoValidHost_Remote: No
valid host was found.
Traceback (most recent call last):

  File "/usr/lib/python2.7/site-packages/oslo_messaging/rpc/server.py",
line 226, in inner
    return func(*args, **kwargs)

  File "/usr/lib/python2.7/site-packages/nova/scheduler/manager.py",
line 139, in select_destinations
    raise exception.NoValidHost(reason="")

NoValidHost: No valid host was found.
2018-08-08 09:28:35.974 1648 ERROR nova.conductor.manager Traceback
(most recent call last):
2018-08-08 09:28:35.974 1648 ERROR nova.conductor.manager   File
"/usr/lib/python2.7/site-packages/nova/conductor/manager.py", line
1116, in schedule_and_build_instances
2018-08-08 09:28:35.974 1648 ERROR nova.conductor.manager
instance_uuids, return_alternates=True)
2018-08-08 09:28:35.974 1648 ERROR nova.conductor.manager   File
"/usr/lib/python2.7/site-packages/nova/conductor/manager.py", line
716, in _schedule_instances
2018-08-08 09:28:35.974 1648 ERROR nova.conductor.manager
return_alternates=return_alternates)
2018-08-08 09:28:35.974 1648 ERROR nova.conductor.manager   File
"/usr/lib/python2.7/site-packages/nova/scheduler/utils.py", line 726,
in wrapped
2018-08-08 09:28:35.974 1648 ERROR nova.conductor.manager     return
func(*args, **kwargs)
2018-08-08 09:28:35.974 1648 ERROR nova.conductor.manager   File
"/usr/lib/python2.7/site-packages/nova/scheduler/client/__init__.py",
line 53, in select_destinations
2018-08-08 09:28:35.974 1648 ERROR nova.conductor.manager
instance_uuids, return_objects, return_alternates)
2018-08-08 09:28:35.974 1648 ERROR nova.conductor.manager   File
"/usr/lib/python2.7/site-packages/nova/scheduler/client/__init__.py",
line 37, in __run_method
2018-08-08 09:28:35.974 1648 ERROR nova.conductor.manager     return
getattr(self.instance, __name)(*args, **kwargs)
2018-08-08 09:28:35.974 1648 ERROR nova.conductor.manager   File
"/usr/lib/python2.7/site-packages/nova/scheduler/client/query.py",
line 42, in select_destinations
2018-08-08 09:28:35.974 1648 ERROR nova.conductor.manager
instance_uuids, return_objects, return_alternates)
2018-08-08 09:28:35.974 1648 ERROR nova.conductor.manager   File
"/usr/lib/python2.7/site-packages/nova/scheduler/rpcapi.py", line 158,
in select_destinations
2018-08-08 09:28:35.974 1648 ERROR nova.conductor.manager     return
cctxt.call(ctxt, 'select_destinations', **msg_args)
2018-08-08 09:28:35.974 1648 ERROR nova.conductor.manager   File
"/usr/lib/python2.7/site-packages/oslo_messaging/rpc/client.py", line
174, in call
2018-08-08 09:28:35.974 1648 ERROR nova.conductor.manager     retry=self.retry)
2018-08-08 09:28:35.974 1648 ERROR nova.conductor.manager   File
"/usr/lib/python2.7/site-packages/oslo_messaging/transport.py", line
131, in _send
2018-08-08 09:28:35.974 1648 ERROR nova.conductor.manager
timeout=timeout, retry=retry)
2018-08-08 09:28:35.974 1648 ERROR nova.conductor.manager   File
"/usr/lib/python2.7/site-packages/oslo_messaging/_drivers/amqpdriver.py",
line 559, in send
2018-08-08 09:28:35.974 1648 ERROR nova.conductor.manager     retry=retry)
2018-08-08 09:28:35.974 1648 ERROR nova.conductor.manager   File
"/usr/lib/python2.7/site-packages/oslo_messaging/_drivers/amqpdriver.py",
line 550, in _send
2018-08-08 09:28:35.974 1648 ERROR nova.conductor.manager     raise result
2018-08-08 09:28:35.974 1648 ERROR nova.conductor.manager
NoValidHost_Remote: No valid host was found.
2018-08-08 09:28:35.974 1648 ERROR nova.conductor.manager Traceback
(most recent call last):
2018-08-08 09:28:35.974 1648 ERROR nova.conductor.manager
2018-08-08 09:28:35.974 1648 ERROR nova.conductor.manager   File
"/usr/lib/python2.7/site-packages/oslo_messaging/rpc/server.py", line
226, in inner
2018-08-08 09:28:35.974 1648 ERROR nova.conductor.manager     return
func(*args, **kwargs)
2018-08-08 09:28:35.974 1648 ERROR nova.conductor.manager
2018-08-08 09:28:35.974 1648 ERROR nova.conductor.manager   File
"/usr/lib/python2.7/site-packages/nova/scheduler/manager.py", line
139, in select_destinations
2018-08-08 09:28:35.974 1648 ERROR nova.conductor.manager     raise
exception.NoValidHost(reason="")
2018-08-08 09:28:35.974 1648 ERROR nova.conductor.manager
2018-08-08 09:28:35.974 1648 ERROR nova.conductor.manager NoValidHost:
No valid host was found.
2018-08-08 09:28:35.974 1648 ERROR nova.conductor.manager
2018-08-08 09:28:35.974 1648 ERROR nova.conductor.manager
2018-08-08 09:28:36.328 1648 WARNING nova.scheduler.utils
[req-ef0d8ea1-e801-483e-b913-9148a6ac5d90
2499343cbc7a4ca5a7f14c43f9d9c229 3850596606b7459d8802a72516991a19 -
default default] Failed to compute_task_build_instances: No valid host
was found.
Traceback (most recent call last):

  File "/usr/lib/python2.7/site-packages/oslo_messaging/rpc/server.py",
line 226, in inner
    return func(*args, **kwargs)

  File "/usr/lib/python2.7/site-packages/nova/scheduler/manager.py",
line 139, in select_destinations
    raise exception.NoValidHost(reason="")

NoValidHost: No valid host was found.
: NoValidHost_Remote: No valid host was found.
2018-08-08 09:28:36.331 1648 WARNING nova.scheduler.utils
[req-ef0d8ea1-e801-483e-b913-9148a6ac5d90
2499343cbc7a4ca5a7f14c43f9d9c229 3850596606b7459d8802a72516991a19 -
default default] [instance: b466a974-06ba-459b-bc04-2ccb2b3ee720]
Setting instance to ERROR state.: NoValidHost_Remote: No valid host
was found.
### END ###
On Wed, Aug 8, 2018 at 9:45 AM Jay Pipes <jaypipes at gmail.com> wrote:
>
> On 08/08/2018 09:37 AM, Cody wrote:
> >> On 08/08/2018 07:19 AM, Bernd Bausch wrote:
> >>> I would think you don't even reach the scheduling stage. Why bother
> >>> looking for a suitable compute node if you exceeded your quota anyway?
> >>>
> >>> The message is in the conductor log because it's the conductor that does
> >>> most of the work. The others are just slackers (like nova-api) or wait
> >>> for instructions from the conductor.
> >>>
> >>> The above is my guess, of course, but IMHO a very educated one.
> >>>
> >>> Bernd.
> >
> > Thank you, Bernd. I didn't know the inner workflow in this case.
> > Initially, I thought it was for the scheduler to discover that no more
> > resource was left available, hence I expected to see something from
> > the scheduler log. My understanding now is that the quota get checked
> > in the database prior to the deployment. That would explain why the
> > clue was in the nova-conductor.log, not the nova-scheduler.log.
>
> Quota is checked in the nova-api node, not the nova-conductor.
>
> As I said in my previous message, unless you paste what the logs are
> that you are referring to, it's not possible to know what you are
> referring to.
>
> Best,
> -jay




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