Kernel and ramdisk ids cannot have 'None' value in Glance

[Mike Fedosin]

Currently if user wants to create an instance using a Glance snapshot that has no value for ramdisk_id or kernel_id, then Nova copies the image metadata into instance system metadata and prefixes the keys with 'image_'.
Due to [1] the None value of ramdisk_id and kernel_id get written as the string 'None' in system metadata.

Unfortunately these values are not accepted by glance image schema in v2 api [2]. They can be None, but a not string 'None'.

This issue doesn't allow us to fully adopt glance v2 api in Nova.

Paste from ~smatzek http://paste.openstack.org/show/485397/

[1] https://github.com/openstack/nova/blob/master/nova/utils.py#L1245
[2] https://github.com/openstack/glance/blob/master/etc/schema-image.json

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/274203

[OpenStack Infra (hudson-openstack)]

Change abandoned by Mike Fedosin (<email address hidden>) on branch: master
Review: https://review.openstack.org/274203

[Augustina Ragwitz (auggy)]

The patch was abandoned because it was determined these values should be validated/filtered in the GlanceImageServiceV2 class. Also this issue is no longer blocking Glance v2 compatibility per https://review.openstack.org/#/c/321551/

Marking this as invalid, please reopen if I'm mistaken.