Horizon does not report properly quota exceeded errors

[Saverio Proto]

This bug is in Openstack Pike, I dont have the possibility to test in master at the moment.

The user can have a instance that is booted from volume. The user is at the page horizon/project/instances/ and he clicks on create snapshot.

In the Create Snapshot dialog he puts the name of the snapshot, and there is no other information available about this quota.

When the user goes beyond quota to create cinder snapshots we observe this in the cinder backend:

2018-05-04 13:43:13,172.172 24030 WARNING cinder.quota_utils [req-562b1787-837b-49fb-9882-f3053cbd395e 6c3d8d645b31444f998d054ce5a3d4cd ef11372569d145599dd9e62dbed6889a - default default] Quota exceeded for ef11372569d145599dd9e62dbed6889a, tried to create 160G snapshot (160G of 200G already consumed)

However the user in Horizon gets this error message in a red window at the top right corner:

Error: unable to create snapshot.

It does not get any indication that the problem is the quota.

Other workflows, like making a Cinder snapshot from the volume list, report correctly that it is a quota problem.

This is a problem because the user does not understand that it is a problem with his quota, and he complains with the Openstack admins believing it is a backend error.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/594330

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/594330
Committed: https://git.openstack.org/cgit/openstack/horizon/commit/?id=a24aa0c87cd61897ebe3c2983104dcd0a1ddee84
Submitter: Zuul
Branch: master

commit a24aa0c87cd61897ebe3c2983104dcd0a1ddee84
Author: PrivateRookie <email address hidden>
Date: Tue Aug 21 23:51:47 2018 +0800

    fix incorrect quota exceeded error when creating snapshot

    Change-Id: Ib8b7e1bfe02641fd0ac7f50ab99093dc7c77d9bf
    Closes-Bug:#1769128

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/horizon 15.0.0.0b1 development milestone.