Glance adding image member fails with multibackend

[Nathaniel Sherry]

When adding an image member to a shared image, we get the following traceback on glance-api:

Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/glance/common/wsgi.py", line 1427, in __call__
    request, **action_args)
  File "/usr/lib/python2.7/site-packages/glance/common/wsgi.py", line 1470, in dispatch
    return method(*args, **kwargs)
  File "/usr/lib/python2.7/site-packages/glance/common/utils.py", line 417, in wrapped
    return func(self, req, *args, **kwargs)
  File "/usr/lib/python2.7/site-packages/glance/api/v2/image_members.py", line 117, in create
    member_repo.add(new_member)
  File "/usr/lib/python2.7/site-packages/glance/api/authorization.py", line 170, in add
    self.member_repo.add(image_member)
  File "/usr/lib/python2.7/site-packages/glance/notifier.py", line 556, in add
    super(ImageMemberRepoProxy, self).add(member)
  File "/usr/lib/python2.7/site-packages/glance/domain/proxy.py", line 121, in add
    self.base.add(self.member_proxy_helper.unproxy(member))
  File "/usr/lib/python2.7/site-packages/glance/api/policy.py", line 254, in add
    self.member_repo.add(member)
  File "/usr/lib/python2.7/site-packages/glance/location.py", line 567, in add
    self._set_acls()
  File "/usr/lib/python2.7/site-packages/glance/location.py", line 563, in _set_acls
    context=self.context)
  File "/usr/lib/python2.7/site-packages/glance_store/backend.py", line 550, in set_acls
    loc = location.get_location_from_uri(location_uri, conf=CONF)
  File "/usr/lib/python2.7/site-packages/glance_store/location.py", line 77, in get_location_from_uri
    raise exceptions.UnknownScheme(scheme=pieces.scheme)
UnknownScheme: Unknown scheme 'file' found in URI

Related config is:
[DEFAULT]
enabled_backends = gpfs:file
[gpfs]
filesystem_store_datadir = /path/to/Openstack/Glance

If I'm reading this right, the issue is related to glance_store.location.SCHEME_TO_CLS_MAP being empty. This causes backend.get_location_from_uri to fail to look up the scheme.

I think this is happening because backend.py is populating location.SCHEME_TO_CLS_MAP, but multi_backend is populating location.SCHEME_TO_CLS_BACKEND_MAP. Because location.get_location_from_uri is only looking at SCHEME_TO_CLS_MAP, when it is called with a multi-backend config, it fails to find any registered schemes.

[Abhishek Kekane (abhishek-kekane)]

Hi Could you please add steps of how you are adding member to image?

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/673453

[Nathaniel Sherry (nsherry4)]

We're adding it using the python glance client API.

glance.image_members.create(image_id, project_id)
glance.image_members.update(image_id, project_id, "accepted")

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/673453
Committed: https://git.openstack.org/cgit/openstack/glance/commit/?id=aca6996ea93d4ab491a996e714831adb82888ad3
Submitter: Zuul
Branch: master

commit aca6996ea93d4ab491a996e714831adb82888ad3
Author: Abhishek Kekane <email address hidden>
Date: Tue Jul 30 08:45:26 2019 +0000

    Adding member to image fails for multiple stores

    If multiple stores is enabled then adding member to image fails with
    UnknownScheme: Unknown scheme 'XXXX' found in URI while setting _acls
    to the store.

    Made provision to call 'set_acls_for_multi_store' if multiple stores
    are enabled.

    Change-Id: I7594185396f7a58a3c0aeeacab891b5eb18a8bf3
    Closes-Bug: #1838332

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/glance 19.0.0.0b1 development milestone.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/stein
Review: https://review.opendev.org/692952

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/692952
Committed: https://git.openstack.org/cgit/openstack/glance/commit/?id=843d878eb0c61added97a669ccd8d22ae951cc77
Submitter: Zuul
Branch: stable/stein

commit 843d878eb0c61added97a669ccd8d22ae951cc77
Author: Abhishek Kekane <email address hidden>
Date: Tue Jul 30 08:45:26 2019 +0000

    Adding member to image fails for multiple stores

    If multiple stores is enabled then adding member to image fails with
    UnknownScheme: Unknown scheme 'XXXX' found in URI while setting _acls
    to the store.

    Made provision to call 'set_acls_for_multi_store' if multiple stores
    are enabled.

    (backport note: change name 'store' back to 'backend' since it is
    before the bp:multi-store-vocabulary-correction)

    Change-Id: I7594185396f7a58a3c0aeeacab891b5eb18a8bf3
    Closes-Bug: #1838332
    (cherry picked from commit aca6996ea93d4ab491a996e714831adb82888ad3)

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/glance 18.0.1 release.