nova/api-guide/source/port_with_resource_request.rst
Balazs Gibizer f06ff5949f Enable evacuation with qos ports
Previous patch [1] implemented support for evacuation of servers with
neutron ports having resource request. So this patch removes the API
check that rejected such operations and document the new feature.

[1] Id9ed7a82d42be8ffe760f03e6610b9e6f5a4287b

Change-Id: Id5f2f4f22b856c989e2eef8ed56b9829d1bcefb6
blueprint: support-move-ops-with-qos-ports-ussuri
2019-10-25 16:14:22 +00:00

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Using ports with resource request
=================================
Starting from microversion 2.72 nova supports creating servers with neutron
ports having resource request visible as a admin-only port attribute
``resource_request``. For example a neutron port has resource request if it has
a QoS minimum bandwidth rule attached. Deleting such servers or detaching such
ports works since Stein version of nova without requiring any specific
microversion.
However the following API operations are still not supported in nova:
* Creating servers with neutron networks having QoS minimum bandwidth rule is
not supported. The user needs to pre-create the port in that neutron network
and create the server with the pre-created port.
* Attaching Neutron ports and networks having QoS minimum bandwidth rule is not
supported.
Also the following API operations are not supported in the 19.0.0 (Stein)
version of nova:
* Moving (resizing, migrating, live-migrating, evacuating, unshelving after
shelve offload) servers with ports having resource request is not yet
supported.
As of 20.0.0 (Train), nova supports cold migrating and resizing servers with
neutron ports having resource requests if both the source and destination
compute services are upgraded to 20.0.0 (Train) and the
``[upgrade_levels]/compute`` configuration does not prevent the computes from
using the latest RPC version.
As of 21.0.0 (Ussuri), nova supports evacuating servers with neutron ports
having resource requests.
See :nova-doc:`the admin guide <admin/port_with_resource_request.html>` for
administrative details.