driver/secheduler/docs for Adds Pick guest CPU architecture based on
host arch in libvirt driver support This is split 2 of 3 for the architecture emulation feature. This implements emulated multi-architecture support through qemu within OpenStack Nova. Additional config variable check to pull host architecture into hw_architecture field for emulation checks to be made. Adds a custom function that simply performs a check for hw_emulation_architecture field being set, allowing for core code to function as normal while enabling a simple check to enable emulated architectures to follow the same path as all multi-arch support already established for physical nodes but instead levaraging qemu which allows for the overall emulation. Added check for domain xml unit test to strip arch from the os tag, as it is not required uefi checks, and only leveraged for emulation checks. Added additional test cases test_driver validating emulation functionality with checking hw_emulation_architecture against the os_arch/hw_architecture field. Added required os-traits and settings for scheduler request_filter. Added RISCV64 to architecture enum for better support in driver. Implements: blueprint pick-guest-arch-based-on-host-arch-in-libvirt-driver Closes-Bug: 1863728 Change-Id: Ia070a29186c6123cf51e1b17373c2dc69676ae7c Signed-off-by: Jonathan Race <jrace@augusta.edu>
This commit is contained in:
Jonathan Race
parent
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133
doc/source/admin/hw-emulation-architecture.rst
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133
doc/source/admin/hw-emulation-architecture.rst
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@ -0,0 +1,133 @@
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..
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Licensed under the Apache License, Version 2.0 (the "License"); you may
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not use this file except in compliance with the License. You may obtain
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a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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License for the specific language governing permissions and limitations
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under the License.
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============================================================================
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hw_emulation_architecture - Configuring QEMU instance emulation architecture
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============================================================================
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.. versionadded:: 25.0.0 (Yoga)
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The libvirt driver now allows for handling of specific cpu architectures
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when defined within the image metadata properties, to be emulated through
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QEMU.
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Added ``hw_emulation_architecture`` as an available image_meta property.
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.. note::
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The following only applies to environments using libvirt compute hosts.
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and should be considered experimental in its entirety, during its first
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release as a feature.
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Introduction
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------------
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This capability is to fill a need with environments that do not have the
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capability to support the various cpu architectures that are present today
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with physical hardware. A small subset of architectures that are supported
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both within libvirt and QEMU have been selected as prime candidates for
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emulation support.
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While support has been added for the below base architectures, this does
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not guarantee that every subset or custom operating system that leverages
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one of these architectures will function.
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Configure
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---------
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-------------------
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QEMU Binary Support
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-------------------
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To ensure that libvirt and QEMU can properly handle the level of cpu
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emulation desired by the end-user, you are required to install the specific
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``qemu-system-XXX``, ``qemu-efi-arm``, ``qemu-efi-aarch64`` binaries on the
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compute nodes that will be providing support.
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---------------
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Console Support
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---------------
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Consideration need to be made in regards to which architectures you want to
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support, as there are limitations on support through spice, novnc, and
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serial. All testing and validation has been done to ensure that spice and
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serial connections function as expected.
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- ``AARCH64`` - Spice & Serial
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- ``S390X`` - Serial
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- ``PPC64LE`` - Spice & Serial
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- ``MIPSEL`` - untested
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--------------------------------
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Supported Emulated Architectures
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--------------------------------
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The supported emulated architectures require specific image meta
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properties to be set in order to trigger the proper settings to be
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configured by libvirtd.
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For end users the emulation architecture of an instance is controlled by the
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selection of an image with the ``hw_emulation_architecture`` image metadata
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property set.
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AARCH64
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~~~~~~~
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``Tested and Validated as functional``
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.. code-block:: shell
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$ openstack image set --property hw_emulation_architecture=aarch64 $IMAGE
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$ openstack image set --property hw_machine_type=virt $IMAGE
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$ openstack image set --property hw_firmware_type=uefi $IMAGE
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S390x
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~~~~~
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``Tested and Validated as functional``
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.. code-block:: shell
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$ openstack image set --property hw_emulation_architecture=s390x $IMAGE
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$ openstack image set --property hw_machine_type=s390-ccw-virtio $IMAGE
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$ openstack image set --property hw_video_model=virtio $IMAGE
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PPC64LE
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~~~~~~~
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``Tested and Validated as functional``
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.. code-block:: shell
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$ openstack image set --property hw_emulation_architecture=ppc64le $IMAGE
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$ openstack image set --property hw_machine_type=pseries $IMAGE
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MIPSEL
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~~~~~~
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``Testing and validation is ongoing to overcome PCI issues``
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.. note::
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Support is currently impacted, one current method for support is manually
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patching and compiling as defined in libvirt bug
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`XML error: No PCI buses available`_.
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.. _`XML error: No PCI buses available`: https://bugzilla.redhat.com/show_bug.cgi?id=1432101
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.. code-block:: shell
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$ openstack image set --property hw_emulation_architecture=mipsel $IMAGE
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$ openstack image set --property hw_machine_type=virt $IMAGE
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@ -227,3 +227,4 @@ Once you are running nova, the following information is extremely useful.
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upgrades
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node-down
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hw-machine-type
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hw-emulation-architecture
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@ -212,6 +212,8 @@ def transform_image_metadata(ctxt, request_spec):
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'hw_disk_bus': 'COMPUTE_STORAGE_BUS',
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'hw_video_model': 'COMPUTE_GRAPHICS_MODEL',
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'hw_vif_model': 'COMPUTE_NET_VIF_MODEL',
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'hw_architecture': 'HW_ARCH',
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'hw_emulation_architecture': 'COMPUTE_ARCH',
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}
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trait_names = []
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@ -14,6 +14,7 @@
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# under the License.
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import datetime
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import re
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from lxml import etree
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from oslo_log import log as logging
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@ -47,6 +48,8 @@ class UEFIServersTest(base.ServersTestBase):
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orig_create = nova.virt.libvirt.guest.Guest.create
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def fake_create(cls, xml, host):
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xml = re.sub('type arch.*machine',
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'type machine', xml)
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tree = etree.fromstring(xml)
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self.assertXmlEqual(
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"""
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@ -406,13 +406,15 @@ class TestRequestFilter(test.NoDBTestCase):
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self.assertIn('took %.1f seconds', log_lines[1])
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@mock.patch.object(request_filter, 'LOG', new=mock.Mock())
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def test_transform_image_metadata(self):
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def test_transform_image_metadata_x86(self):
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self.flags(image_metadata_prefilter=True, group='scheduler')
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properties = objects.ImageMetaProps(
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hw_disk_bus=objects.fields.DiskBus.SATA,
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hw_cdrom_bus=objects.fields.DiskBus.IDE,
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hw_video_model=objects.fields.VideoModel.QXL,
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hw_vif_model=network_model.VIF_MODEL_VIRTIO
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hw_vif_model=network_model.VIF_MODEL_VIRTIO,
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hw_architecture=objects.fields.Architecture.X86_64,
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hw_emulation_architecture=objects.fields.Architecture.AARCH64
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)
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reqspec = objects.RequestSpec(
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image=objects.ImageMeta(properties=properties),
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@ -426,6 +428,36 @@ class TestRequestFilter(test.NoDBTestCase):
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'COMPUTE_NET_VIF_MODEL_VIRTIO',
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'COMPUTE_STORAGE_BUS_IDE',
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'COMPUTE_STORAGE_BUS_SATA',
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'HW_ARCH_X86_64',
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'COMPUTE_ARCH_AARCH64',
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}
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self.assertEqual(expected, reqspec.root_required)
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@mock.patch.object(request_filter, 'LOG', new=mock.Mock())
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def test_transform_image_metadata_aarch64(self):
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self.flags(image_metadata_prefilter=True, group='scheduler')
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properties = objects.ImageMetaProps(
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hw_disk_bus=objects.fields.DiskBus.SATA,
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hw_cdrom_bus=objects.fields.DiskBus.IDE,
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hw_video_model=objects.fields.VideoModel.QXL,
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hw_vif_model=network_model.VIF_MODEL_VIRTIO,
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hw_architecture=objects.fields.Architecture.AARCH64,
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hw_emulation_architecture=objects.fields.Architecture.X86_64
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)
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reqspec = objects.RequestSpec(
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image=objects.ImageMeta(properties=properties),
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flavor=objects.Flavor(extra_specs={}),
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)
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self.assertTrue(
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request_filter.transform_image_metadata(None, reqspec)
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)
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expected = {
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'COMPUTE_GRAPHICS_MODEL_QXL',
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'COMPUTE_NET_VIF_MODEL_VIRTIO',
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'COMPUTE_STORAGE_BUS_IDE',
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'COMPUTE_STORAGE_BUS_SATA',
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'HW_ARCH_AARCH64',
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'COMPUTE_ARCH_X86_64',
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}
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self.assertEqual(expected, reqspec.root_required)
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@ -5218,7 +5218,8 @@ class LibvirtConnTestCase(test.NoDBTestCase,
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self.mock_uname.return_value = fakelibvirt.os_uname(
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'Linux', '', '5.4.0-0-generic', '', fields.Architecture.AARCH64)
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drvr = libvirt_driver.LibvirtDriver(fake.FakeVirtAPI(), True)
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self.assertTrue(drvr._check_uefi_support(None))
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image_meta = objects.ImageMeta.from_dict(self.test_image_meta)
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self.assertTrue(drvr._check_uefi_support(image_meta))
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def test_get_guest_config_with_block_device(self):
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drvr = libvirt_driver.LibvirtDriver(fake.FakeVirtAPI(), True)
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@ -5769,6 +5770,7 @@ class LibvirtConnTestCase(test.NoDBTestCase,
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self.flags(enabled=True, group='serial_console')
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drvr = libvirt_driver.LibvirtDriver(fake.FakeVirtAPI(), True)
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instance = objects.Instance(**self.test_instance)
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image_meta = objects.ImageMeta.from_dict(self.test_image_meta)
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expected = {
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fields.Architecture.X86_64: vconfig.LibvirtConfigGuestSerial,
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@ -5781,7 +5783,10 @@ class LibvirtConnTestCase(test.NoDBTestCase,
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guest = vconfig.LibvirtConfigGuest()
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drvr._create_consoles(
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guest_cfg=guest, instance=instance, flavor={}, image_meta={})
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guest_cfg=guest,
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instance=instance,
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flavor={},
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image_meta=image_meta)
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self.assertEqual(1, len(guest.devices))
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console_device = guest.devices[0]
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self.assertIsInstance(console_device, device_type)
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@ -5993,9 +5998,13 @@ class LibvirtConnTestCase(test.NoDBTestCase,
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self.flags(enabled=serial_enabled, group='serial_console')
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guest_cfg = vconfig.LibvirtConfigGuest()
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instance = objects.Instance(**self.test_instance)
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image_meta = objects.ImageMeta.from_dict(self.test_image_meta)
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drvr._create_consoles(
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guest_cfg, instance=instance, flavor=None, image_meta=None)
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guest_cfg,
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instance=instance,
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flavor=None,
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image_meta=image_meta)
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self.assertEqual(1, len(guest_cfg.devices))
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device = guest_cfg.devices[0]
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@ -7975,6 +7984,33 @@ class LibvirtConnTestCase(test.NoDBTestCase,
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self.assertIsInstance(conf.cpu, vconfig.LibvirtConfigGuestCPU)
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self.assertEqual(conf.cpu.mode, 'custom')
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def test_get_x86_64_hw_emulated_architecture_aarch64(self):
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drvr = libvirt_driver.LibvirtDriver(fake.FakeVirtAPI(), True)
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image_meta = objects.ImageMeta.from_dict({
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"disk_format": "raw",
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'properties': {
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'hw_architecture': 'x86_64',
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'hw_emulation_architecture': 'aarch64',
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'hw_machine_type': 'virt',
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'hw_firmware_type': 'uefi',
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}})
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self.assertEqual(drvr._check_emulation_arch(image_meta),
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'aarch64')
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def test_get_x86_64_hw_emulated_architecture_ppc64(self):
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drvr = libvirt_driver.LibvirtDriver(fake.FakeVirtAPI(), True)
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image_meta = objects.ImageMeta.from_dict({
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"disk_format": "raw",
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'properties': {
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'hw_architecture': 'x86_64',
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'hw_emulation_architecture': 'ppc64le',
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'hw_machine_type': 'pseries',
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}})
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self.assertEqual(drvr._check_emulation_arch(image_meta),
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'ppc64le')
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@mock.patch.object(libvirt_driver.LOG, 'warning')
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def test_get_guest_cpu_config_custom_with_extra_flags(self,
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mock_warn):
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@ -2823,6 +2823,7 @@ class LibvirtConfigGuest(LibvirtConfigObject):
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self.os_init_path = None
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self.os_boot_dev = []
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self.os_smbios = None
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self.os_arch = None
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self.os_mach_type = None
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self.os_bootmenu = False
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self.devices = []
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@ -2865,6 +2866,8 @@ class LibvirtConfigGuest(LibvirtConfigObject):
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os.set("firmware", self.os_firmware)
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type_node = self._text_node("type", self.os_type)
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if self.os_arch is not None:
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type_node.set("arch", self.os_arch)
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if self.os_mach_type is not None:
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type_node.set("machine", self.os_mach_type)
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os.append(type_node)
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@ -5118,6 +5118,43 @@ class LibvirtDriver(driver.ComputeDriver):
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else:
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mount.get_manager().host_down()
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def _check_emulation_arch(self, image_meta):
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# NOTE(chateaulav) In order to support emulation via qemu,
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# there are required metadata properties that need applied
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# to the designated glance image. The config drive is not
|
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# supported. This leverages the hw_architecture and
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# hw_emulation_architecture image_meta fields to allow for
|
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# emulation to take advantage of all physical multiarch work
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# being done.
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#
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# aarch64 emulation support metadata values:
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# 'hw_emulation_architecture=aarch64'
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# 'hw_firmware_type=uefi'
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# 'hw_machine_type=virt'
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#
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# ppc64le emulation support metadata values:
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# 'hw_emulation_architecture=ppc64le'
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# 'hw_machine_type=pseries'
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#
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# s390x emulation support metadata values:
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# 'hw_emulation_architecture=s390x'
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# 'hw_machine_type=s390-ccw-virtio'
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# 'hw_video_model=virtio'
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#
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# TODO(chateaulav) Further Work to be done:
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# testing mips functionality while waiting on redhat libvirt
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# patch https://listman.redhat.com/archives/libvir-list/
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# 2016-May/msg00197.html
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#
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# https://bugzilla.redhat.com/show_bug.cgi?id=1432101
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emulation_arch = image_meta.properties.get("hw_emulation_architecture")
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if emulation_arch:
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arch = emulation_arch
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else:
|
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arch = libvirt_utils.get_arch(image_meta)
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||||
|
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return arch
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def _get_cpu_model_mapping(self, model):
|
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"""Get the CPU model mapping
|
||||
|
||||
@ -5258,7 +5295,7 @@ class LibvirtDriver(driver.ComputeDriver):
|
||||
|
||||
def _get_guest_cpu_config(self, flavor, image_meta,
|
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guest_cpu_numa_config, instance_numa_topology):
|
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arch = libvirt_utils.get_arch(image_meta)
|
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arch = self._check_emulation_arch(image_meta)
|
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cpu = self._get_guest_cpu_model_config(flavor, arch)
|
||||
|
||||
if cpu is None:
|
||||
@ -5271,6 +5308,23 @@ class LibvirtDriver(driver.ComputeDriver):
|
||||
cpu.threads = topology.threads
|
||||
cpu.numa = guest_cpu_numa_config
|
||||
|
||||
caps = self._host.get_capabilities()
|
||||
if arch != caps.host.cpu.arch:
|
||||
# Try emulating. Other arch configs will go here
|
||||
cpu.mode = None
|
||||
if arch == fields.Architecture.AARCH64:
|
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cpu.model = "cortex-a57"
|
||||
elif arch == fields.Architecture.PPC64LE:
|
||||
cpu.model = "POWER8"
|
||||
# TODO(chateaulav): re-evaluate when libvirtd adds overall
|
||||
# RISCV suuport as a supported architecture, as there is no
|
||||
# cpu models associated, this simply associates X vcpus to the
|
||||
# guest according to the flavor. Thes same issue should be
|
||||
# present with mipsel due to same limitation, but has not been
|
||||
# tested.
|
||||
elif arch == fields.Architecture.MIPSEL:
|
||||
cpu = None
|
||||
|
||||
return cpu
|
||||
|
||||
def _get_guest_disk_config(
|
||||
@ -5957,7 +6011,7 @@ class LibvirtDriver(driver.ComputeDriver):
|
||||
clk.add_timer(tmrtc)
|
||||
|
||||
hpet = image_meta.properties.get('hw_time_hpet', False)
|
||||
guestarch = libvirt_utils.get_arch(image_meta)
|
||||
guestarch = self._check_emulation_arch(image_meta)
|
||||
if guestarch in (fields.Architecture.I686,
|
||||
fields.Architecture.X86_64):
|
||||
# NOTE(rfolco): HPET is a hardware timer for x86 arch.
|
||||
@ -6020,7 +6074,7 @@ class LibvirtDriver(driver.ComputeDriver):
|
||||
|
||||
if CONF.libvirt.virt_type in ("qemu", "kvm"):
|
||||
# vmcoreinfo support is x86, ARM-only for now
|
||||
guestarch = libvirt_utils.get_arch(image_meta)
|
||||
guestarch = self._check_emulation_arch(image_meta)
|
||||
if guestarch in (
|
||||
fields.Architecture.I686, fields.Architecture.X86_64,
|
||||
fields.Architecture.AARCH64,
|
||||
@ -6081,8 +6135,7 @@ class LibvirtDriver(driver.ComputeDriver):
|
||||
raise exception.InvalidVideoMode(model=video_type)
|
||||
return video_type
|
||||
|
||||
guestarch = libvirt_utils.get_arch(image_meta)
|
||||
|
||||
guestarch = self._check_emulation_arch(image_meta)
|
||||
if CONF.libvirt.virt_type == 'parallels':
|
||||
return 'vga'
|
||||
|
||||
@ -6114,8 +6167,9 @@ class LibvirtDriver(driver.ComputeDriver):
|
||||
# NOTE(kevinz): Only virtio device type is supported by AARCH64
|
||||
# so use 'virtio' instead when running on AArch64 hardware.
|
||||
return 'virtio'
|
||||
|
||||
if CONF.spice.enabled:
|
||||
elif guestarch == fields.Architecture.MIPSEL:
|
||||
return 'virtio'
|
||||
elif CONF.spice.enabled:
|
||||
return 'qxl'
|
||||
|
||||
# NOTE(lyarwood): Return None and default to the default of
|
||||
@ -6355,7 +6409,14 @@ class LibvirtDriver(driver.ComputeDriver):
|
||||
flavor: 'objects.Flavor',
|
||||
) -> None:
|
||||
if CONF.libvirt.virt_type in ("kvm", "qemu"):
|
||||
arch = libvirt_utils.get_arch(image_meta)
|
||||
caps = self._host.get_capabilities()
|
||||
host_arch = caps.host.cpu.arch
|
||||
arch = self._check_emulation_arch(image_meta)
|
||||
guest.os_arch = self._check_emulation_arch(image_meta)
|
||||
if arch != host_arch:
|
||||
# If emulating, downgrade to qemu
|
||||
guest.virt_type = "qemu"
|
||||
|
||||
if arch in (fields.Architecture.I686, fields.Architecture.X86_64):
|
||||
guest.sysinfo = self._get_guest_config_sysinfo(instance)
|
||||
guest.os_smbios = vconfig.LibvirtConfigGuestSMBIOS()
|
||||
@ -6502,13 +6563,17 @@ class LibvirtDriver(driver.ComputeDriver):
|
||||
self._create_consoles_qemu_kvm(
|
||||
guest_cfg, instance, flavor, image_meta)
|
||||
|
||||
def _is_mipsel_guest(self, image_meta):
|
||||
archs = (fields.Architecture.MIPSEL, fields.Architecture.MIPS64EL)
|
||||
return self._check_emulation_arch(image_meta) in archs
|
||||
|
||||
def _is_s390x_guest(self, image_meta):
|
||||
s390x_archs = (fields.Architecture.S390, fields.Architecture.S390X)
|
||||
return libvirt_utils.get_arch(image_meta) in s390x_archs
|
||||
archs = (fields.Architecture.S390, fields.Architecture.S390X)
|
||||
return self._check_emulation_arch(image_meta) in archs
|
||||
|
||||
def _is_ppc64_guest(self, image_meta):
|
||||
archs = (fields.Architecture.PPC64, fields.Architecture.PPC64LE)
|
||||
return libvirt_utils.get_arch(image_meta) in archs
|
||||
return self._check_emulation_arch(image_meta) in archs
|
||||
|
||||
def _create_consoles_qemu_kvm(self, guest_cfg, instance, flavor,
|
||||
image_meta):
|
||||
@ -6677,7 +6742,19 @@ class LibvirtDriver(driver.ComputeDriver):
|
||||
# controller (x86 gets one by default)
|
||||
usbhost.model = None
|
||||
if not self._guest_needs_usb(guest, image_meta):
|
||||
usbhost.model = 'none'
|
||||
archs = (
|
||||
fields.Architecture.PPC,
|
||||
fields.Architecture.PPC64,
|
||||
fields.Architecture.PPC64LE,
|
||||
)
|
||||
if self._check_emulation_arch(image_meta) in archs:
|
||||
# NOTE(chateaulav): during actual testing and implementation
|
||||
# it wanted None for ppc, as this removes it from the domain
|
||||
# xml, where 'none' adds it but then disables it causing
|
||||
# libvirt errors and the instances not being able to build
|
||||
usbhost.model = None
|
||||
else:
|
||||
usbhost.model = 'none'
|
||||
guest.add_device(usbhost)
|
||||
|
||||
def _guest_add_pcie_root_ports(self, guest):
|
||||
@ -7174,7 +7251,7 @@ class LibvirtDriver(driver.ComputeDriver):
|
||||
# libvirt will automatically add a PS2 keyboard)
|
||||
# TODO(stephenfin): We might want to do this for other non-x86
|
||||
# architectures
|
||||
arch = libvirt_utils.get_arch(image_meta)
|
||||
arch = self._check_emulation_arch(image_meta)
|
||||
if arch != fields.Architecture.AARCH64:
|
||||
return None
|
||||
|
||||
|
||||
@ -526,6 +526,9 @@ def get_cpu_model_from_arch(arch: str) -> str:
|
||||
mode = 'qemu32'
|
||||
elif arch == obj_fields.Architecture.PPC64LE:
|
||||
mode = 'POWER8'
|
||||
# TODO(chateaulav): Testing of emulated archs ongoing
|
||||
# elif arch == obj_fields.Architecture.MIPSEL:
|
||||
# mode = '24Kf-mips-cpu'
|
||||
# NOTE(kevinz): In aarch64, cpu model 'max' will offer the capabilities
|
||||
# that all the stuff it can currently emulate, both for "TCG" and "KVM"
|
||||
elif arch == obj_fields.Architecture.AARCH64:
|
||||
@ -568,6 +571,7 @@ def get_default_machine_type(arch: str) -> ty.Optional[str]:
|
||||
default_mtypes = {
|
||||
obj_fields.Architecture.ARMV7: "virt",
|
||||
obj_fields.Architecture.AARCH64: "virt",
|
||||
obj_fields.Architecture.PPC64LE: "pseries",
|
||||
obj_fields.Architecture.S390: "s390-ccw-virtio",
|
||||
obj_fields.Architecture.S390X: "s390-ccw-virtio",
|
||||
obj_fields.Architecture.I686: "pc",
|
||||
|
||||
@ -0,0 +1,10 @@
|
||||
---
|
||||
features:
|
||||
- |
|
||||
image meta now includes the ``hw_emulation_architecture`` property.
|
||||
This allows an operator to define their emulated cpu architecture for
|
||||
an image, and nova will deploy accordingly.
|
||||
|
||||
See the `spec`_ for more details and reasoning.
|
||||
|
||||
.. _spec: https://specs.openstack.org/openstack/nova-specs/specs/yoga/approved/pick-guest-arch-based-on-host-arch-in-libvirt-driver.html
|
||||
Loading…
Reference in New Issue
Block a user