GLANCE_ENABLE_QUOTAS=true seems to cause 502 error when creating an image

[Bharat Kunwar]

Since [1] merged on Devstack, Magnum CI [2] has been reporting 502 errors when uploading images to Glance.

```
++ functions:_upload_image:121 : openstack --os-cloud=devstack-admin --os-region-name=RegionOne image create Fedora-Cloud-Base-33-1.2.x86_64 --public --container-format bare --disk-format qcow2 --property hw_rng_model=virtio
HttpException: 502: Server Error for url: https://10.210.32.131/image/v2/images/3dc75f76-cbb5-47a3-ab48-f81c127947e9/file, response from an upstream server.: The proxy server received an invalid: Bad Gateway: 502 Bad Gateway: Apache/2.4.41 (Ubuntu) Server at 10.210.32.131 Port 80
+ functions:_upload_image:1 : exit_trap
```

[1] https://review.opendev.org/c/openstack/devstack/+/788056
[2] https://zuul.opendev.org/t/openstack/build/b5e49d2229754bd99fc4ec21d6abd2b1

[Dan Smith (danms)]

If the image is large, then you likely need to increase your glance quota size in your job. I'm not sure why it's getting a 500 like that, as I don't see anything in the logs about that on look. Since you're using a fedora image, I'm guessing that's the problem.

https://github.com/openstack/devstack/blob/master/doc/source/configuration.rst#glance

[Takashi Kajinami (kajinamit)]

Let's see whether the suggested setting can help.
 https://review.opendev.org/c/openstack/magnum/+/802542

[Martin Kopec (mkopec)]

Seem https://review.opendev.org/c/openstack/magnum-tempest-plugin/+/802539/ solve the issue for magnum .. is there anything else to be addressed here, or can we close this bug for both, glance and devstack?

[Cyril Roelandt (cyril-roelandt)]

Marking this bug as "Invalid" because it's not actually a Glance issue.

[Launchpad Janitor (janitor)]

[Expired for devstack because there has been no activity for 60 days.]