On Thu, Jul 28, 2016 at 2:34 PM, Ken D'Ambrosio <k...@jots.org> wrote: > Trying to orchestrate a bunch of VMs on our ~500 core cloud, and we're > getting the "not enough hosts" problem. Only issue is that the dashboard > seems to imply we've got the elbow room needed to instantiate. Furthermore, > it would be *really handy* if I knew what the bottleneck it thought was: > disk, RAM, CPU, whatever. Here's a sample of the error: > > ----------------------- begin ----------------------- > 2016-07-28 18:40:47.961 1080 WARNING nova.scheduler.utils > [req-977badf4-a4a2-4766-87fd-c4e3ceb2e293 a4c895a6fe294ae3a81e3c6bb9209f52 > 33c2cf3cb61c425abcb0e0d35fdf21b7 - - -] [instance: > ee175a40-11d9-4a43-b6e1-c4d7935acff1] Setting instance to ERROR state. > 2016-07-28 18:40:51.892 1023 WARNING nova.scheduler.utils > [req-e2a65200-1662-4cd7-aa9e-db5e225adfa1 a4c895a6fe294ae3a81e3c6bb9209f52 > 33c2cf3cb61c425abcb0e0d35fdf21b7 - - -] Failed to > compute_task_build_instances: No valid host was found. There are not enough > hosts available. > Traceback (most recent call last): > > File "/usr/lib/python2.7/dist-packages/oslo_messaging/rpc/server.py", line > 142, in inner > return func(*args, **kwargs) > > File "/usr/lib/python2.7/dist-packages/nova/scheduler/manager.py", line > 84, in select_destinations > filter_properties) > > File > "/usr/lib/python2.7/dist-packages/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. > ----------------------- begin ----------------------- > > Any suggestions on how to track down exactly what's going wrong?
Try taking a look at nova-scheduler log on your controller (usually in /var/log/nova/nova-scheduler.log). I do not remember any time I have seen the "not enough hosts" when the reason was not obvious from the scheduler log. > > Thanks! > > -Ken > > _______________________________________________ > Mailing list: http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack > Post to : openstack@lists.openstack.org > Unsubscribe : http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack --- Mikhail Medvedev IBM _______________________________________________ Mailing list: http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack Post to : openstack@lists.openstack.org Unsubscribe : http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
