On 10/25/2013 02:08 PM, openstack learner wrote: > hi guys, > > > Instead of username/password, does the nova client python API support Keystone's token-based authentication? Yes, but normal tokens expire, so the idea is that you authenticate with username/password, then get back a token that you use for the rest of your session. See here for samples. http://www.ibm.com/developerworks/cloud/library/cl-openstack-pythonapis/ Chris