Ildiko Vancsa
7e6ae9afd9
This change introduces a new microversion which must be used to create a server from a multiattach volume or attach a multiattach volume to an existing server instance. Attaching a multiattach volume to a shelved offloaded instance is not supported since an instance in that state does not have a compute host so we can't tell if the compute would support the multiattach volume or not. This is consistent with the tagged attach validation with 2.49. When creating a server from a multiattach volume, we'll check to see if all computes in all cells are upgraded to the point of even supporting the compute side changes, otherwise the server create request fails with a 409. We do this because we don't know which compute node the scheduler will pick and we don't have any compute capability filtering in the scheduler for multiattach volumes (that may be a future improvement). Similarly, when attaching a multiattach volume to an existing instance, if the compute isn't new enough to support multiattach or the virt driver simply doesn't support the capability, a 409 response is returned. Presumably, operators will use AZs/aggregates to organize which hosts support multiattach if they have a mixed hypervisor deployment, or will simply disable multiattach support via Cinder policy. The unit tests are covering error conditions with the new flow. A new functional scenario test is added for happy path testing of the new boot from multiattach volume flow and attaching a multiattach volume to more than one instance. Tempest integration testing for multiattach is added in change I80c20914c03d7371e798ca3567c37307a0d54aaa. Devstack support for multiattach is added in change I46b7eabf6a28f230666f6933a087f73cb4408348. Co-Authored-By: Matt Riedemann <mriedem.os@gmail.com> Implements: blueprint multi-attach-volume Change-Id: I02120ef8767c3f9c9497bff67101e57e204ed6f4
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Team and repository tags
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.. image:: https://governance.openstack.org/badges/nova.svg
:target: https://governance.openstack.org/reference/tags/index.html
.. Change things from this point on
OpenStack Nova
==============
OpenStack Nova provides a cloud computing fabric controller, supporting a wide
variety of compute technologies, including: libvirt (KVM, Xen, LXC and more),
Hyper-V, VMware, XenServer, OpenStack Ironic and PowerVM.
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://developer.openstack.org/api-guide/compute/>`__
- `Compute API Reference <https://developer.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/