nova/releasenotes/notes/bp-service-hyper-uuid-in-ap...

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features:
- |
Microversion 2.53 changes service and hypervisor IDs to UUIDs to ensure
uniqueness across cells. Prior to this, ID collisions were possible in
multi-cell deployments. See the `REST API Version History`_ and
`Compute API reference`_ for details.
.. _REST API Version History: https://docs.openstack.org/developer/nova/api_microversion_history.html
.. _Compute API reference: https://developer.openstack.org/api-ref/compute/