[Bug 1033920] [NEW] Dashboard raises a ServiceCatalogException when attempting to download juju settings

[Andrew Glen-Young]

Public bug reported:

When attempting to download the juju settings file from the dashboard I
receive an exception¹ which displays an ugly, blank 500 error message.

It seems that the juju module is expecting an S3 endpoint in my service
catalog, not finding it and throwing an exception which is not properly
caught. This means that I need to reload the page to remove the blank
page and continue to use the dashboard.

What I expect:

I expect the exception to be thrown (as I do not have the required
endpoint) and an explanation that there was an error with the endpoint
and for the user to be able to use the dashboard without having to
reload the page.

Exception:

[1]:  After setting DEBUG=True I see the following
ServiceCatalogException from Django:

Environment:


Request Method: POST
Request URL: http://localhost:8000/settings/juju/

Django Version: 1.3.1
Python Version: 2.7.3
Installed Applications:
['openstack_dashboard',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'django_nose',
 'horizon',
 'horizon.dashboards.nova',
 'horizon.dashboards.syspanel',
 'horizon.dashboards.settings']
Installed Middleware:
('django.middleware.common.CommonMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'openstack_dashboard.middleware.DashboardLogUnhandledExceptionsMiddleware',
 'horizon.middleware.HorizonMiddleware',
 'django.middleware.doc.XViewMiddleware',
 'django.middleware.locale.LocaleMiddleware')


Traceback:
File "/usr/lib/python2.7/dist-packages/django/core/handlers/base.py" in get_response
  111.                         response = callback(request, *callback_args, **callback_kwargs)
File "/usr/lib/python2.7/dist-packages/horizon/decorators.py" in dec
  40.         return view_func(request, *args, **kwargs)
File "/usr/lib/python2.7/dist-packages/horizon/decorators.py" in dec
  55.             return view_func(request, *args, **kwargs)
File "/usr/lib/python2.7/dist-packages/horizon/decorators.py" in dec
  40.         return view_func(request, *args, **kwargs)
File "/usr/lib/python2.7/dist-packages/django/views/generic/base.py" in view
  47.             return self.dispatch(request, *args, **kwargs)
File "/usr/lib/python2.7/dist-packages/django/views/generic/base.py" in dispatch
  68.         return handler(request, *args, **kwargs)
File "/usr/lib/python2.7/dist-packages/horizon/forms/views.py" in post
  84.         return self.get(self, request, *args, **kwargs)
File "/usr/lib/python2.7/dist-packages/horizon/forms/views.py" in get
  64.         form, handled = self.maybe_handle()
File "/usr/lib/python2.7/dist-packages/horizon/forms/views.py" in maybe_handle
  59.             self.form, self.handled = form.maybe_handle(self.request, **kwargs)
File "/usr/lib/python2.7/dist-packages/horizon/forms/base.py" in maybe_handle
  101.             exceptions.handle(request)
File "/usr/lib/python2.7/dist-packages/horizon/forms/base.py" in maybe_handle
  99.             return form, form.handle(request, form.cleaned_data)
File "/usr/lib/python2.7/dist-packages/horizon/dashboards/settings/juju/forms.py" in handle
  88.                               redirect=request.build_absolute_uri())
File "/usr/lib/python2.7/dist-packages/horizon/dashboards/settings/juju/forms.py" in handle
  81.                        's3_url': api.url_for(request, 's3'),
File "/usr/lib/python2.7/dist-packages/horizon/api/base.py" in url_for
  112.         raise exceptions.ServiceCatalogException(service_type)

Exception Type: ServiceCatalogException at /settings/juju/
Exception Value: Invalid service catalog service: s3

System settings:

$ dpkg-query --show *dashboard*
openstack-dashboard     2012.1-0ubuntu8.1
openstack-dashboard-ubuntu-theme        2012.1-0ubuntu8.1

$ cat /etc/lsb-release 
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=12.04
DISTRIB_CODENAME=precise
DISTRIB_DESCRIPTION="Ubuntu 12.04 LTS"

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


** Tags: canonistack

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https://bugs.launchpad.net/bugs/1033920

Title:
  Dashboard raises a ServiceCatalogException when attempting to download
  juju settings

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