Artom Lifshitz 79d1f06094 libvirt: call get_capabilities() with all CPUs online
While we do cache the hosts's capabilities in self._caps in the
libvirt Host object, if we happen to fist call get_capabilities() with
some of our dedicated CPUs offline, libvirt erroneously reports them
as being on socket 0 regardless of their real socket. We would then
cache that topology, thus breaking pretty much all of our NUMA
accounting.

To fix this, this patch makes sure to call get_capabilities()
immediately upon host init, and to power up all our dedicated CPUs
before doing so. That way, we cache their real socket ID.

For testing, because we don't really want to implement a libvirt bug
in our Python libvirt fixture, we make due with a simple unit tests
that asserts that init_host() has powered on the correct CPUs.

Closes-bug: 2077228
Change-Id: I9a2a7614313297f11a55d99fb94916d3583a9504
2024-08-17 09:20:26 -04:00
2023-11-10 20:12:31 +00:00
2019-04-19 19:45:52 +00:00
2014-05-07 12:14:26 -07:00
2017-11-24 16:51:12 -05:00
2023-08-13 09:16:27 +02:00
2010-05-27 23:05:26 -07:00
2017-09-07 15:42:31 +02:00
2024-05-01 01:30:04 +09:00
2017-03-02 11:50:48 +00:00
2024-05-01 01:30:04 +09:00
2024-05-21 17:43:27 +00:00

==============
OpenStack Nova
==============

.. image:: https://governance.openstack.org/tc/badges/nova.svg
    :target: https://governance.openstack.org/tc/reference/tags/index.html

.. Change things from this point on


OpenStack Nova provides a cloud computing fabric controller, supporting a wide
variety of compute technologies, including: libvirt (KVM, Xen, LXC and more),
VMware and OpenStack Ironic.

Use the following resources to learn more.

API
---

To learn how to use Nova's API, consult the documentation available online at:

- `Compute API Guide <https://docs.openstack.org/api-guide/compute/>`__
- `Compute API Reference <https://docs.openstack.org/api-ref/compute/>`__

For more information on OpenStack APIs, SDKs and CLIs in general, refer to:

- `OpenStack for App Developers <https://www.openstack.org/appdev/>`__
- `Development resources for OpenStack clouds
  <https://developer.openstack.org/>`__

Operators
---------

To learn how to deploy and configure OpenStack Nova, consult the documentation
available online at:

- `OpenStack Nova <https://docs.openstack.org/nova/>`__

In the unfortunate event that bugs are discovered, they should be reported to
the appropriate bug tracker. If you obtained the software from a 3rd party
operating system vendor, it is often wise to use their own bug tracker for
reporting problems. In all other cases use the master OpenStack bug tracker,
available at:

- `Bug Tracker <https://bugs.launchpad.net/nova>`__

Developers
----------

For information on how to contribute to Nova, please see the contents of the
CONTRIBUTING.rst.

Any new code must follow the development guidelines detailed in the HACKING.rst
file, and pass all unit tests.

Further developer focused documentation is available at:

- `Official Nova Documentation <https://docs.openstack.org/nova/>`__
- `Official Client Documentation
  <https://docs.openstack.org/python-novaclient/>`__

Other Information
-----------------

During each `Summit`_ and `Project Team Gathering`_, we agree on what the whole
community wants to focus on for the upcoming release. The plans for nova can
be found at:

- `Nova Specs <http://specs.openstack.org/openstack/nova-specs/>`__

.. _Summit: https://www.openstack.org/summit/
.. _Project Team Gathering: https://www.openstack.org/ptg/
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