May 2018
Intermediate to advanced
256 pages
7h 6m
English
Content preview from OpenStack for Architects - Second Edition
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Authentication and authorization in OpenStack
Having an understanding of how authentication and authorization work within OpenStack is helpful. Each call to an OpenStack API service is authorized by a bearer token, which is retrieved from and verified by the Keystone service. The following figure summarizes this interaction:
When requesting the token from Keystone, the client sends along the requested scope of the token: the tenant, project, or domain. Assuming that the credentials authorize the client, the token that Keystone returns is specific to the scope requested. Once the client has obtained the token, each API request to the other ...
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