cinder/api-ref/source/v3/index.rst

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Block Storage API V3 (CURRENT)

Note

The URL for most API methods includes a {project_id} placeholder that represents the caller's project ID. As of v3.67, the project_id is optional in the URL, and the following are equivalent:

  • GET /v3/{project_id}/volumes
  • GET /v3/volumes

In both instances, the actual project ID used by the API method is the one in the caller's keystone context. For that reason, including a project ID in the URL is redundant.

The v3.67 microversion is only used as an indicator that the API accepts a URL without a {project_id} segment, and this applies to all requests regardless of the microversion in the request. For example, an API node serving v3.67 or greater will accept a URL without a {project_id} segment even if the request asks for v3.0. Likewise, it will accept a URL containing a {project_id} segment even if the request asks for v3.67.