Hi, I am trying to install Ceilometer service with Openstack queens release. On installing gnocchi-api with apt-get install gnocchi-api I get the following error: Registering service and endpoints for gnocchi with type metric at http://192.168.133.81:8041 Failed to discover available identity versions when contacting http://127.0.0.1:35357/v3/. Attempting to parse version from URL. Unable to establish connection to http://127.0.0.1:35357/v3/auth/tokens: HTTPConnectionPool(host='127.0.0.1', port=35357): Max retries exceeded with url: /v3/auth/tokens (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7f0bf2672250>: Failed to establish a new connection: [Errno 111] Connection refused',)) Warning - data is empty Failed to discover available identity versions when contacting http://127.0.0.1:35357/v3/. Attempting to parse version from URL. Unable to establish connection to http://127.0.0.1:35357/v3/auth/tokens: HTTPConnectionPool(host='127.0.0.1', port=35357): Max retries exceeded with url: /v3/auth/tokens (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7fa1c8b0cb90>: Failed to establish a new connection: [Errno 111] Connection refused',)) dpkg: error processing package gnocchi-api (--configure): subprocess installed post-installation script returned error exit status 1 Errors were encountered while processing: gnocchi-api E: Sub-process /usr/bin/dpkg returned an error code (1) Kindly, let me know how to proceed from here. Regards, Nehal