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[Bug 1439819] [NEW] Fail to create a snapshot of an instance booted from a volume backed snapshot

 

Public bug reported:

Fail to create a snapshot of an instance booted from a volume backed
snapshot.

It's reproduced with current (~Kilo-3) devstack.

Steps to reproduce:

$ nova boot inst --block-device id=<cirros>,source=image,dest=volume,bootindex=0,size=1--flavor m1.nano
$ nova image-create inst volback
$ nova boot inst-2 --image volback --flavor m1.nano
$ nova image-create inst-2 volback-2

Response:
ERROR (BadRequest): <html>
 <head>
  <title>400 Bad Request</title>
 </head>
 <body>
  <h1>400 Bad Request</h1>
  Invalid disk format 'None' for image.<br /><br />

 </body>
</html> (HTTP 400) (HTTP 400)

The reason is that container_format and disk_format properties, which
are passed to glance to create 'volback-2' image, are derived from
'volback' image, but they should be absent to create a new snapshot.

** Affects: nova
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1439819

Title:
  Fail to create a snapshot of an instance booted from a volume backed
  snapshot

Status in OpenStack Compute (Nova):
  New

Bug description:
  Fail to create a snapshot of an instance booted from a volume backed
  snapshot.

  It's reproduced with current (~Kilo-3) devstack.

  Steps to reproduce:

  $ nova boot inst --block-device id=<cirros>,source=image,dest=volume,bootindex=0,size=1--flavor m1.nano
  $ nova image-create inst volback
  $ nova boot inst-2 --image volback --flavor m1.nano
  $ nova image-create inst-2 volback-2

  Response:
  ERROR (BadRequest): <html>
   <head>
    <title>400 Bad Request</title>
   </head>
   <body>
    <h1>400 Bad Request</h1>
    Invalid disk format 'None' for image.<br /><br />

   </body>
  </html> (HTTP 400) (HTTP 400)

  The reason is that container_format and disk_format properties, which
  are passed to glance to create 'volback-2' image, are derived from
  'volback' image, but they should be absent to create a new snapshot.

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Follow ups

References