Sorry dheeru,
I´ve not explained very well.
I have all services running (cinder, glance, keystone, nova, quantum and swift) and everything is OK: I can access through horizon dashboard and manage whatever I want.
The thing is when any service is either stopped or down, I´m not able to see the dashboard running anymore coming up that exception. It should be possible to manage other services in the dashboard.
My test: I´ve stopped manually cinder service and this is the trace of horizon dashboard:
ConnectionError at /admin/
HTTPConnectionPool(host='10.0.2.239', port=8776): Max retries exceeded with url: /v1/0c954d731cdc4a369fe3818275b44608/os-quota-sets/0c954d731cdc4a369fe3818275b44608 (Caused by <class 'socket.error'=""> : [Errno 111] Connection refused)
Request Method: GET
Request URL: http://10.0.2.239:8079/admin/
Django Version: 1.4.6
Exception Type: ConnectionError
Exception Value:
HTTPConnectionPool(host='10.0.2.239', port=8776): Max retries exceeded with url: /v1/0c954d731cdc4a369fe3818275b44608/os-quota-sets/0c954d731cdc4a369fe3818275b44608 (Caused by <class 'socket.error'="">: [Errno 111] Connection refused)
Exception Location: /usr/lib/python2.7/site-packages/requests-1.2.2-py2.7.egg/requests/adapters.py in send, line 327
Python Executable: /usr/bin/uwsgi
Python Version: 2.7.2
Python Path:
['/opt/horizon/',
'.',
'',
'/usr/lib/python2.7/site-packages/setuptools-0.9.8dev-py2.7.egg',
'/usr/lib/python2.7/site-packages/setuptools_git-1.0-py2.7.egg',
'/usr/lib/python2.7/site-packages/d2to1-0.2.10-py2.7.egg',
'/usr/lib/python2.7/site-packages/pip-1.3.1-py2.7.egg',
'/usr/lib/python2.7/site-packages/prettytable-0.7.2-py2.7.egg',
'/usr/lib/python2.7/site-packages/requests-1.2.2-py2.7.egg',
'/usr/lib/python2.7/site-packages/jsonpatch-1.1-py2.7.egg',
'/usr/lib/python2.7/site-packages/warlock-1.0.1-py2.7.egg',
'/usr/lib/python2.7/site-packages/paramiko-1.10.1-py2.7.egg',
'/usr/lib/python2.7/site-packages/suds-0.4-py2.7.egg',
'/usr/lib/python2.7/site-packages/stevedore-0.10-py2.7.egg',
'/usr/lib/python2.7/site-packages/decorator-3.4.0-py2.7.egg',
'/usr/lib/python2.7/site-packages/Tempita-0.5.1-py2.7.egg',
'/usr/lib/python2.7/site-packages/MySQL_python-1.2.3-py2.7-linux-x86_64.egg',
'/usr/lib/python2.7/site-packages/SQLAlchemy-0.7.9-py2.7-linux-x86_64.egg',
'/usr/lib/python2.7/site-packages/sqlalchemy_migrate-0.7.2-py2.7.egg',
'/usr/lib/python2.7/site-packages/Paste-1.7.5.1-py2.7.egg',
'/usr/lib/python2.7/site-packages/PasteDeploy-1.5.0-py2.7.egg',
'/usr/lib/python2.7/site-packages/WebOb-1.2.3-py2.7.egg',
'/usr/lib/python2.7/site-packages/repoze.lru-0.6-py2.7.egg',
'/usr/lib/python2.7/site-packages/Routes-1.13-py2.7.egg',
'/usr/lib/python2.7/site-packages/lxml-3.2.1-py2.7-linux-x86_64.egg',
'/usr/lib/python2.7/site-packages/anyjson-0.3.3-py2.7.egg',
'/usr/lib/python2.7/site-packages/amqp-1.0.13-py2.7.egg',
'/usr/lib/python2.7/site-packages/kombu-2.5.12-py2.7.egg',
'/usr/lib/python2.7/site-packages/eventlet-0.13.0-py2.7.egg',
'/usr/lib/python2.7/site-packages/amqplib-1.0.2-py2.7.egg',
'/usr/lib/python2.7/site-packages/django_appconf-0.6-py2.7.egg',
'/usr/lib/python2.7/site-packages/django_compressor-1.3-py2.7.egg',
'/usr/lib/python2.7/site-packages/django_openstack_auth-1.0.9-py2.7.egg',
'/usr/lib/python2.7/site-packages/boto-2.9.7-py2.7 ... (more)
some more details like when you hit this issue or services are running etc details would help.