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[Mike Fedosin <1539698@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

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

** Affects: nova
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1539698

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

Status in OpenStack Compute (nova):
  New

Bug description:
  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

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