f64bca803f
This blueprint proposes the introduction of Hyper-V generation 2 VMs support in the Nova Hyper-V compute driver. Note: This blueprint was already approved (as a trivial blueprint) and merged in Kilo. It is resubmitted as of ML thread: http://lists.openstack.org/pipermail/openstack-dev/2015-May/063178.html Co-Authored-By: Claudiu Belu <cbelu@cloudbasesolutions.com> Implements: blueprint hyper-v-generation-2-vms Change-Id: I1b0f145bbb17df8cd6578ebd7ce0588acab9bb50
210 lines
5.3 KiB
ReStructuredText
210 lines
5.3 KiB
ReStructuredText
..
|
|
This work is licensed under a Creative Commons Attribution 3.0 Unported
|
|
License.
|
|
|
|
http://creativecommons.org/licenses/by/3.0/legalcode
|
|
|
|
==========================================
|
|
Hyper-V generation 2 VMs
|
|
==========================================
|
|
|
|
https://blueprints.launchpad.net/nova/+spec/hyper-v-generation-2-vms
|
|
|
|
Introduction of Hyper-V generation 2 VMs support in the Nova Hyper-V
|
|
compute driver.
|
|
|
|
Problem description
|
|
===================
|
|
|
|
Hyper-V Server 2012 R2 introduces a new feature for virtual machines named
|
|
"generation 2", consisting mainly in a new virtual firmware and better support
|
|
for synthetic devices.
|
|
|
|
Use Cases
|
|
----------
|
|
|
|
The main advantages are:
|
|
|
|
* secureboot support
|
|
* reduced boot time
|
|
* virtual devices completely synthetic (no emulation)
|
|
* UEFI firmware in place of BIOS
|
|
* support for live resize of boot disks (expand)
|
|
|
|
Operating systems supporting generation 2:
|
|
|
|
* Windows Server 2012 / Windows 8 and above
|
|
* Newer Linux kernels
|
|
|
|
Other operating systems not supporting generation 2, including previous
|
|
versions of Windows won't install or boot, so generation 1 needs to be retained
|
|
as the default.
|
|
|
|
The image must be in VHDX format.
|
|
|
|
Project Priority
|
|
-----------------
|
|
|
|
None
|
|
|
|
Proposed change
|
|
===============
|
|
|
|
The Hyper-V compute driver creates a generation 2 VM based on a property
|
|
defined in the instance image, defaulting to generation 1.
|
|
|
|
The compute driver will raise an exception if the provided image has the VHD
|
|
format or if the requested VM Generation is not supported by the host (e.g.:
|
|
if the image requests VM Generation 2 but the host is Windows Hyper-V / Server
|
|
2012 or older and does not support that feature).
|
|
|
|
Generation 2 VMs don't support IDE devices, which means that local boot and
|
|
ephemeral disks must be attached to a SCSI controller, while retaining IDE
|
|
support for generation 1 instances (where SCSI boot is not supported).
|
|
|
|
The Hyper-V Generation 2 VMs will have Secure Boot disabled, since it is not
|
|
supported by all Linux distributions, see [3]. A blueprint will be proposed in
|
|
order to enable Secure Boot.
|
|
|
|
Proposed image property to identify the desired generation and related values:
|
|
|
|
hw_machine_type={hyperv-gen1,hyperv-gen2}
|
|
|
|
If there are multiple versions of Hyper-V as compute nodes in an OpenStack
|
|
deployment (e.g.: Windows Hyper-V / Server 2012 and Windows Hyper-V / Server
|
|
2012 R2), then this property is necessary, in order for the scheduler to select
|
|
an incompatible compute node for a VM Generation 2 instance:
|
|
|
|
hypervisor_version_requires='>=6.3'
|
|
|
|
Hypervisor version 6.3 is equivalent to Windows Hyper-V / Server 2012 R2.
|
|
|
|
Examples:
|
|
|
|
glance image-create --property hypervisor_type=hyperv \
|
|
--property hw_machine_type=hyperv-gen2 \
|
|
--property hypervisor_version_requires='>=6.3' --name image-gen2 \
|
|
--disk-format vhd --container-format bare --file path/to/image.vhdx
|
|
|
|
or
|
|
|
|
glance image-update --property hw_machine_type=hyperv-gen2 image-gen2
|
|
glance image-update --property hypervisor_version_requires='>=6.3'
|
|
|
|
Alternatives
|
|
------------
|
|
|
|
Generation 1 VMs are currently supported.
|
|
|
|
Data model impact
|
|
-----------------
|
|
|
|
None
|
|
|
|
REST API impact
|
|
---------------
|
|
|
|
None
|
|
|
|
Security impact
|
|
---------------
|
|
|
|
None
|
|
|
|
Notifications impact
|
|
--------------------
|
|
|
|
None
|
|
|
|
Other end user impact
|
|
---------------------
|
|
|
|
None
|
|
|
|
Performance Impact
|
|
------------------
|
|
|
|
None
|
|
|
|
Other deployer impact
|
|
---------------------
|
|
|
|
There are a couple of things that must be taken into account when deploying
|
|
Generation 2 VMs. For more details, see [4]. Most notable restrictions are:
|
|
|
|
* Images used for Generation 1 VMs cannot be used for Generation 2 VMs. Images
|
|
must be created by installing the guest OS in a Generation 2 VM.
|
|
|
|
* Guest OSes must be 64-bit.
|
|
|
|
* RemoteFX is not supported for Generation 2 VMs.
|
|
|
|
* Ubuntu images need extra preparation before they can be used for Generation 2
|
|
VMs. For more details, see [5], Note section, point 11.
|
|
|
|
Developer impact
|
|
----------------
|
|
|
|
None
|
|
|
|
Implementation
|
|
==============
|
|
|
|
Assignee(s)
|
|
-----------
|
|
|
|
Primary assignee:
|
|
cbelu
|
|
|
|
Other contributors:
|
|
alexpilotti
|
|
|
|
Work Items
|
|
----------
|
|
|
|
* Nova Hyper-V driver implementation
|
|
* Unit tests
|
|
|
|
Dependencies
|
|
============
|
|
|
|
None
|
|
|
|
Testing
|
|
=======
|
|
|
|
Unit tests. The Hyper-V CI will still run using Generation 1 VMs and the plan
|
|
is to have a subset of Tempest tests using a Generation 2 VM.
|
|
|
|
Documentation Impact
|
|
====================
|
|
|
|
The Nova driver documentation should include an entry about this topic
|
|
including when to use and when not to use generation 2 VMs. A note on the
|
|
relevant Glance image property should be added as well.
|
|
|
|
References
|
|
==========
|
|
|
|
[1] Initial discussion (Juno design summit):
|
|
https://etherpad.openstack.org/p/nova-hyperv-juno
|
|
|
|
[2] Hyper-V Generation 2 VMs
|
|
http://blogs.technet.com/b/jhoward/archive/2013/11/04/hyper-v-generation-2-virtual-machines-part-7.aspx
|
|
|
|
[3] Secure Boot on:
|
|
* CentOS and RedHat:
|
|
https://technet.microsoft.com/en-us/library/dn531026.aspx
|
|
* Oracle Linux:
|
|
https://technet.microsoft.com/en-us/library/dn609828.aspx
|
|
* SUSE:
|
|
https://technet.microsoft.com/en-us/library/dn531027.aspx
|
|
* Ubuntu:
|
|
https://technet.microsoft.com/en-us/library/dn531029.aspx
|
|
|
|
[4] Hyper-V Generation 2 VMs FAQ:
|
|
https://technet.microsoft.com/en-us/library/dn282285
|
|
|
|
[4] Ubuntu Generation 2 VMs preparation:
|
|
https://technet.microsoft.com/en-us/library/dn531029.aspx
|