[Bug 1657459] Re: WebOb>=1.2.3 requirement for Glance will lead to 0 bytes backing image files on OpenStack Newton, although the image file sent to the python client does not have 0 bytes

[Ian Cordasco]

So the fundamental part of this is that there's a subtle change in webob
1.7.0 in how webob.request.Request.is_body_readable is implemented.

On 1.7.0, it tells Glance that the body is not readable so it prevents
it from reaching certain checks that would produce the appropriate
responses. This commit is the root cause of several of Glance's test
failures:
https://github.com/Pylons/webob/commit/0e6fcbfbc58af6fdd4e125543bf8f5fb91b984c6

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Title:
  WebOb>=1.2.3 requirement for Glance will  lead to 0 bytes backing
  image files on OpenStack Newton, although the image file sent to the
  python client does not have 0 bytes

Status in Glance:
  Triaged
Status in glance package in Ubuntu:
  Triaged

Bug description:
  On CentOS 7 AIO Newton OpenStack deployed with packstack, the default
  WebOb glance requirement was >= 1.2.3 and pip installed the 1.7.0
  version.

  When I created a glance image from the cli, using the filesystem
  backend as default, with a raw file of 1GB, the glance image-create
  command showed that a image was created, but with the size of 0 bytes.

  After forcing with pip the WebOb==1.2.3 version, the issue was not
  longer there.

  I have tried with python 2.7 and 3.4 and to upload the image via
  horizon or with different python-glance client versions => when WebOb
  version was 1.7.0 the outcome was wrong, as I ended up with a 0 bytes
  image in the backing store.

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