Hello, Some time ago I found that there is problem with unconsistent behaviour (IMHO) of Nova API when user wants to spawn bunch of instances in server group (affinity or anti-affinity). I described it in [1]. I also made some summary how Nova is working in different cases of spawning instances. Results are like below:
+---------------------------------+-----------+-----------+--------------------------------+-----------------+
| QUOTAS | | |
| |
+----------+----------------------+ min_count | max_count | number of spawned
instances | Expected result |
|instances | server_group_members | | |
| |
+==========+======================+===========+===========+================================+=================+
| 10 | 5 | 3 | 4 | 4
| 4 |
+----------+----------------------+-----------+-----------+--------------------------------+-----------------+
| 10 | 5 | 6 | 9 |Quota exceeded, too
many servers|Group Quota |
| | | | |in group (HTTP 403)
|exceeded |
+----------+----------------------+-----------+-----------+--------------------------------+-----------------+
| 10 | 5 | 3 | 6 |Quota exceeded, too
many servers| 5 |
| | | | |in group (HTTP 403)
| |
+----------+----------------------+-----------+-----------+--------------------------------+-----------------+
| 10 | 5 | 3 | 11 |Quota exceeded, too
many servers| 5 |
| | | | |in group (HTTP 403)
| |
+----------+----------------------+-----------+-----------+--------------------------------+-----------------+
| 10 | 5 | 6 | 11 |Quota exceeded, too
many servers|Group Quota |
| | | | |in group (HTTP 403)
|exceeded |
+----------+----------------------+-----------+-----------+--------------------------------+-----------------+
| 10 | 5 | 3 | - | 3
| 3 |
+----------+----------------------+-----------+-----------+--------------------------------+-----------------+
| 10 | 5 | 6 | - |Quota exceeded, too
many servers|Group Quota |
| | | | |in group (HTTP 403)
|exceeded |
+----------+----------------------+-----------+-----------+--------------------------------+-----------------+
| 10 | 5 | 11 | - |Quota exceeded for
instances: |Servers Quota |
| | | | |Requested 11, but
already used 0|exceeded |
| | | | | of 10 instances
| |
+----------+----------------------+-----------+-----------+--------------------------------+-----------------+
| 10 | 5 | - | 3 | 3
| 3 |
+----------+----------------------+-----------+-----------+--------------------------------+-----------------+
| 10 | 5 | - | 6 |Quota exceeded, too
many servers|Group Quota |
| | | | |in group (HTTP 403)
|exceeded |
+----------+----------------------+-----------+-----------+--------------------------------+-----------------+
| 10 | 5 | - | 11 |Quota exceeded, too
many servers|Group Quota |
| | | | |in group (HTTP 403)
|exceeded |
+----------+----------------------+-----------+-----------+--------------------------------+-----------------+
In "expected result" I described behaviour which I suppose that is should be
there.
Can You maybe check it and tell me if I'm right here and there is really bug as
described in [1]?
I also made some patch to fix it [2] so please review it if You think that it
is worth to fix this behaviour.
[1] https://bugs.launchpad.net/nova/+bug/1623809
[2] https://review.openstack.org/#/c/371592/
--
Best regards / Pozdrawiam
Sławek Kapłoński
sla...@kaplonski.pl
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