Hi,
I'm having an issue with no valid host errors when starting instances
and I'm struggling to figure out why. I thought the problem was disk
space, but I changed the disk_allocation_ratio and I'm still getting no
valid host. The host does have plenty of disk space free, so that
shouldn't be a problem.
However, I'm not even sure it's disk that's causing the failures because
I can't find any information in the logs about why the no valid host is
happening. All I get from the scheduler is:
"Got no allocation candidates from the Placement API. This may be a
temporary occurrence as compute nodes start up and begin reporting
inventory to the Placement service."
While in placement I see:
2018-08-01 15:02:22.062 20 DEBUG nova.api.openstack.placement.requestlog
[req-0a830ce9-e2af-413a-86cb-b47ae129b676
fc44fe5cefef43f4b921b9123c95e694 b07e6dc2e6284b00ac7070aa3457c15e -
default default] Starting request: 10.2.2.201 "GET
/placement/allocation_candidates?limit=1000&resources=DISK_GB%3A20%2CMEMORY_MB%3A2048%2CVCPU%3A1"
__call__
/usr/lib/python2.7/site-packages/nova/api/openstack/placement/requestlog.py:38
2018-08-01 15:02:22.103 20 INFO nova.api.openstack.placement.requestlog
[req-0a830ce9-e2af-413a-86cb-b47ae129b676
fc44fe5cefef43f4b921b9123c95e694 b07e6dc2e6284b00ac7070aa3457c15e -
default default] 10.2.2.201 "GET
/placement/allocation_candidates?limit=1000&resources=DISK_GB%3A20%2CMEMORY_MB%3A2048%2CVCPU%3A1"
status: 200 len: 53 microversion: 1.25
Basically it just seems to be logging that it got a request, but there's
no information about what it did with that request.
So where do I go from here? Is there somewhere else I can look to see
why placement returned no candidates?
Thanks.
-Ben
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