Discovering versions from the identity service failed when creating the password plugin.

asked 2017-03-19 03:20:29 -0500

Hello Everyone,
I have installed openstack on CentOS7.
When I installing keystone follow the install-guide to create the service project, the error occurred

    # openstack project create --domain default \
>   --description "Service Project" service

Discovering versions from the identity service failed when creating the password plugin. Attempting to determine version from URL.
Unable to establish connection to http://controller:35357/v3/auth/tokens: HTTPConnectionPool(host='controller', port=35357): Max retries exceeded with url: /v3/auth/tokens (Caused by NewConnectionError('<requests.packages.urllib3.connection.HTTPConnection object at 0x225f810>: Failed to establish a new connection: [Errno -2] Name or service not known',))

how can I solve this issue?

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