[Bug 1404887] [NEW] "ValueError: too many values to unpack" when booting from iso with rbd store

[cristi1979]

Public bug reported:

When trying to boot from an ISO, we get the following exception:

==> /var/log/glance/api.log <==
2014-12-22 08:27:56.412 11965 INFO glance.wsgi.server [91b3aeeb-b05e-43ab-8315-6c7802e9074e 29368392490440a5b74c060bda4fd1d6 549f70b78b844a598c0ecda62373400e - - -] Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/eventlet/wsgi.py", line 433, in handle_one_response
    result = self.application(self.environ, start_response)
  File "/usr/lib/python2.7/site-packages/webob/dec.py", line 130, in __call__
    resp = self.call_func(req, *args, **self.kwargs)
  File "/usr/lib/python2.7/site-packages/webob/dec.py", line 195, in call_func
    return self.func(req, *args, **kwargs)
  File "/usr/lib/python2.7/site-packages/glance/common/wsgi.py", line 394, in __call__
    response = req.get_response(self.application)
  File "/usr/lib/python2.7/site-packages/webob/request.py", line 1296, in send
    application, catch_exc_info=False)
  File "/usr/lib/python2.7/site-packages/webob/request.py", line 1260, in call_application
    app_iter = application(self.environ, start_response)
  File "/usr/lib/python2.7/site-packages/webob/dec.py", line 130, in __call__
    resp = self.call_func(req, *args, **self.kwargs)
  File "/usr/lib/python2.7/site-packages/webob/dec.py", line 195, in call_func
    return self.func(req, *args, **kwargs)
  File "/usr/lib/python2.7/site-packages/osprofiler/web.py", line 99, in __call__
    return request.get_response(self.application)
  File "/usr/lib/python2.7/site-packages/webob/request.py", line 1296, in send
    application, catch_exc_info=False)
  File "/usr/lib/python2.7/site-packages/webob/request.py", line 1260, in call_application
    app_iter = application(self.environ, start_response)
  File "/usr/lib/python2.7/site-packages/keystonemiddleware/auth_token.py", line 748, in __call__
    return self._call_app(env, start_response)
  File "/usr/lib/python2.7/site-packages/keystonemiddleware/auth_token.py", line 684, in _call_app
    return self._app(env, _fake_start_response)
  File "/usr/lib/python2.7/site-packages/webob/dec.py", line 130, in __call__
    resp = self.call_func(req, *args, **self.kwargs)
  File "/usr/lib/python2.7/site-packages/webob/dec.py", line 195, in call_func
    return self.func(req, *args, **kwargs)
  File "/usr/lib/python2.7/site-packages/glance/common/wsgi.py", line 394, in __call__
    response = req.get_response(self.application)
  File "/usr/lib/python2.7/site-packages/webob/request.py", line 1296, in send
    application, catch_exc_info=False)
  File "/usr/lib/python2.7/site-packages/webob/request.py", line 1260, in call_application
    app_iter = application(self.environ, start_response)
  File "/usr/lib/python2.7/site-packages/webob/dec.py", line 130, in __call__
    resp = self.call_func(req, *args, **self.kwargs)
  File "/usr/lib/python2.7/site-packages/webob/dec.py", line 195, in call_func
    return self.func(req, *args, **kwargs)
  File "/usr/lib/python2.7/site-packages/glance/common/wsgi.py", line 394, in __call__
    response = req.get_response(self.application)
  File "/usr/lib/python2.7/site-packages/webob/request.py", line 1296, in send
    application, catch_exc_info=False)
  File "/usr/lib/python2.7/site-packages/webob/request.py", line 1260, in call_application
    app_iter = application(self.environ, start_response)
  File "/usr/lib/python2.7/site-packages/webob/dec.py", line 130, in __call__
    resp = self.call_func(req, *args, **self.kwargs)
  File "/usr/lib/python2.7/site-packages/webob/dec.py", line 195, in call_func
    return self.func(req, *args, **kwargs)
  File "/usr/lib/python2.7/site-packages/glance/common/wsgi.py", line 394, in __call__
    response = req.get_response(self.application)
  File "/usr/lib/python2.7/site-packages/webob/request.py", line 1296, in send
    application, catch_exc_info=False)
  File "/usr/lib/python2.7/site-packages/webob/request.py", line 1260, in call_application
    app_iter = application(self.environ, start_response)
  File "/usr/lib/python2.7/site-packages/paste/urlmap.py", line 203, in __call__
    return app(environ, start_response)
  File "/usr/lib/python2.7/site-packages/webob/dec.py", line 144, in __call__
    return resp(environ, start_response)
  File "/usr/lib/python2.7/site-packages/routes/middleware.py", line 131, in __call__
    response = self.app(environ, start_response)
  File "/usr/lib/python2.7/site-packages/webob/dec.py", line 144, in __call__
    return resp(environ, start_response)
  File "/usr/lib/python2.7/site-packages/webob/dec.py", line 130, in __call__
    resp = self.call_func(req, *args, **self.kwargs)
  File "/usr/lib/python2.7/site-packages/webob/dec.py", line 195, in call_func
    return self.func(req, *args, **kwargs)
  File "/usr/lib/python2.7/site-packages/glance/common/wsgi.py", line 683, in __call__
    request, **action_args)
  File "/usr/lib/python2.7/site-packages/glance/common/wsgi.py", line 707, in dispatch
    return method(*args, **kwargs)
  File "/usr/lib/python2.7/site-packages/glance/api/v1/images.py", line 498, in show
    image_meta['location'])
  File "/usr/lib/python2.7/site-packages/glance/api/v1/images.py", line 460, in _get_from_store
    image_data, image_size = src_store.get(loc, context=context)
ValueError: too many values to unpack


Versions installed:

rpm -qa | grep glance
python-glance-store-0.1.8-1.el7.centos.noarch
openstack-glance-2014.2.1-1.el7.centos.noarch
python-glanceclient-0.14.2-2.el7.centos.noarch
python-glance-2014.2.1-1.el7.centos.noarch

The only modification to the sources was to add this fix:

self.chunk_size = chunk * (1024 ^ 2) -> self.chunk_size = chunk * (1024
** 2)

** Affects: glance (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1404887

Title:
  "ValueError: too many values to unpack" when booting from iso with rbd
  store

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