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Thanks for the reply Ding. I did manage to fix it the other day. Turned out I had a typo in the api-paste.ini file. 

A classic case of PEBKAC! :)

-----Original Message-----
From: Ding Deng [mailto:ding.deng at gmail.com] 
Sent: 28 May 2012 19:03
To: Kavit Munshi
Cc: openstack-operators at lists.openstack.org
Subject: Re: [Openstack-operators] Dashboard errors

Kavit Munshi <kavit at aptira.com> writes:

> Hello all,
>  
> I was previously using dashboard, nova-api and keystone on the same 
> host. I have now moved them to separate boxes and everything else 
> seems to be fine except for the dashboard. It is broken. Upon 
> navigating to the URL it displays the login prompt but after entering 
> the credentials, I get the following error.

You have to update the API endpoint configurations after moving nova-api and/or Keystone around, both in Nova (api-paste.ini) and the Keystone database.

> Request Method: GET
> Request URL: http://x.x.x.x/syspanel/
>  
> 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.DashboardLogUnhandledExceptionsMiddlew
> are',  '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
>   88.                 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/horizon/decorators.py" in dec
>   88.                 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/tables/views.py" in get
>   105.         handled = self.construct_tables()
> File "/usr/lib/python2.7/dist-packages/horizon/tables/views.py" in construct_tables
>   96.             handled = self.handle_table(table)
> File "/usr/lib/python2.7/dist-packages/horizon/tables/views.py" in handle_table
>   68.         data = self._get_data_dict()
> File "/usr/lib/python2.7/dist-packages/horizon/tables/views.py" in _get_data_dict
>   132.             self._data = {self.table_class._meta.name: self.get_data()}
> File "/usr/lib/python2.7/dist-packages/horizon/usage/views.py" in get_data
>   33.         self.usage.summarize(*self.usage.get_date_range())
> File "/usr/lib/python2.7/dist-packages/horizon/usage/base.py" in summarize
>   94.                                   _('Unable to retrieve usage information.'))
> File "/usr/lib/python2.7/dist-packages/horizon/usage/base.py" in summarize
>   91.                 self.usage_list = self.get_usage_list(start, end)
> File "/usr/lib/python2.7/dist-packages/horizon/usage/base.py" in get_usage_list
>   114.         return api.usage_list(self.request, start, end)
> File "/usr/lib/python2.7/dist-packages/horizon/api/nova.py" in usage_list
>   399.     return [Usage(u) for u in novaclient(request).usage.list(start, end, True)]
> File "/usr/lib/python2.7/dist-packages/novaclient/v1_1/usage.py" in list
>   35.                     "tenant_usages")
> File "/usr/lib/python2.7/dist-packages/novaclient/base.py" in _list
>   76.         data = body[response_key]
>  
> Exception Type: TypeError at /syspanel/ Exception Value: string 
> indices must be integers, not str
>  
> Has anyone seen this before?
>  
> Regards,
>  
> Kavit