def test_live_migrate_server_with_pci(self):
"""Live migrate an instance with a PCI passthrough device.
This should fail because it's not possible to live migrate an instance
with a PCI passthrough device, even if it's a SR-IOV VF.
"""
# start two compute services
self.start_compute(hostname='test_compute0',
pci_info=fakelibvirt.HostPCIDevicesInfo(num_pci=1))
self.start_compute(hostname='test_compute1',
pci_info=fakelibvirt.HostPCIDevicesInfo(num_pci=1))
# create a server
extra_spec = {'pci_passthrough:alias': f'{self.ALIAS_NAME}:1'}
flavor_id = self._create_flavor(extra_spec=extra_spec)
server = self._create_server(flavor_id=flavor_id, networks='none')
# now live migrate that server
ex = self.assertRaises(client.OpenStackApiException,
self._live_migrate, server, 'completed')
# NOTE(stephenfin): this wouldn't happen in a real deployment since
# live migration is a cast, but since we are using CastAsCall this will
# bubble to the API
self.assertEqual(500, ex.response.status_code)
self.assertIn('NoValidHost', str(ex))
def test_create_server_with_neutron(self):
"""Create an instance using a neutron-provisioned SR-IOV VIF."""
pci_info = fakelibvirt.HostPCIDevicesInfo(num_pfs=1, num_vfs=2)
orig_create = nova.virt.libvirt.guest.Guest.create
def fake_create(cls, xml, host):
tree = etree.fromstring(xml)
elem = tree.find('./devices/interface/source/address')
# compare address
expected = ('0x81', '0x00', '0x2')
actual = (
elem.get('bus'),
elem.get('slot'),
elem.get('function'),
)
self.assertEqual(expected, actual)
return orig_create(xml, host)
self.stub_out(
'nova.virt.libvirt.guest.Guest.create',
fake_create,
)
self.start_compute(pci_info=pci_info)
# create the port
self.neutron.create_port({'port': self.neutron.network_4_port_1})
# ensure the binding details are currently unset
port = self.neutron.show_port(
base.LibvirtNeutronFixture.network_4_port_1['id'], )['port']
self.assertNotIn('binding:profile', port)
# create a server using the VF via neutron
flavor_id = self._create_flavor()
self._create_server(
flavor_id=flavor_id,
networks=[
{
'port': base.LibvirtNeutronFixture.network_4_port_1['id']
},
],
)
# ensure the binding details sent to "neutron" were correct
port = self.neutron.show_port(
base.LibvirtNeutronFixture.network_4_port_1['id'], )['port']
self.assertIn('binding:profile', port)
self.assertEqual(
{
'pci_vendor_info': '8086:1515',
'pci_slot': '0000:81:00.2',
'physical_network': 'physnet4',
},
port['binding:profile'],
)
def _start_compute_service(self, hostname):
fake_connection = self._get_connection(
host_info=fakelibvirt.HostInfo(cpu_nodes=2, kB_mem=8192),
# We want to create two pGPUs but no other PCI devices
pci_info=fakelibvirt.HostPCIDevicesInfo(num_pci=0,
num_pfs=0,
num_vfs=0,
num_mdevcap=2),
hostname=hostname)
with mock.patch('nova.virt.libvirt.host.Host.get_connection',
return_value=fake_connection):
# this method will update a self.computes dict keyed by hostname
compute = self._start_compute(hostname)
compute.driver._host.get_connection = lambda: fake_connection
rp_uuid = self._get_provider_uuid_by_name(hostname)
rp_uuids = self._get_all_rp_uuids_in_a_tree(rp_uuid)
for rp in rp_uuids:
inventory = self._get_provider_inventory(rp)
if orc.VGPU in inventory:
usage = self._get_provider_usages(rp)
self.assertEqual(16, inventory[orc.VGPU]['total'])
self.assertEqual(0, usage[orc.VGPU])
# Since we haven't created any mdevs yet, we shouldn't find them
self.assertEqual([], compute.driver._get_mediated_devices())
return compute
def test_create_server_with_pci_dev_and_numa_fails(self):
"""This test ensures that it is not possible to allocated CPU and
memory resources from one NUMA node and a PCI device from another.
"""
host_info = fakelibvirt.HostInfo(cpu_nodes=2,
cpu_sockets=1,
cpu_cores=2,
cpu_threads=2,
kB_mem=15740000)
pci_info = fakelibvirt.HostPCIDevicesInfo(num_pci=1, numa_node=0)
fake_connection = self._get_connection(host_info, pci_info)
self.mock_conn.return_value = fake_connection
# boot one instance with no PCI device to "fill up" NUMA node 0
extra_spec = {
'hw:cpu_policy': 'dedicated',
}
flavor_id = self._create_flavor(vcpu=4, extra_spec=extra_spec)
self._run_build_test(flavor_id)
# now boot one with a PCI device, which should fail to boot
extra_spec['pci_passthrough:alias'] = '%s:1' % self.ALIAS_NAME
flavor_id = self._create_flavor(extra_spec=extra_spec)
self._run_build_test(flavor_id, end_status='ERROR')
def test_create_server_with_pci_dev_and_numa(self):
"""Validate behavior of 'preferred' PCI NUMA policy.
This test ensures that it *is* possible to allocate CPU and memory
resources from one NUMA node and a PCI device from another *if* PCI
NUMA policies are in use.
"""
self.flags(cpu_dedicated_set='0-7', group='compute')
pci_info = fakelibvirt.HostPCIDevicesInfo(num_pci=1, numa_node=0)
self.start_compute(pci_info=pci_info)
# boot one instance with no PCI device to "fill up" NUMA node 0
extra_spec = {
'hw:cpu_policy': 'dedicated',
}
flavor_id = self._create_flavor(vcpu=4, extra_spec=extra_spec)
self._create_server(flavor_id=flavor_id)
# now boot one with a PCI device, which should succeed thanks to the
# use of the PCI policy
extra_spec['pci_passthrough:alias'] = '%s:1' % self.ALIAS_NAME
flavor_id = self._create_flavor(extra_spec=extra_spec)
self._create_server(flavor_id=flavor_id,
expected_state=self.expected_state)
def test_create_server_with_pci_dev_and_numa(self):
"""Validate behavior of 'preferred' PCI NUMA policy.
This test ensures that it *is* possible to allocate CPU and memory
resources from one NUMA node and a PCI device from another *if* PCI
NUMA policies are in use.
"""
host_info = fakelibvirt.HostInfo(cpu_nodes=2,
cpu_sockets=1,
cpu_cores=2,
cpu_threads=2,
kB_mem=15740000)
pci_info = fakelibvirt.HostPCIDevicesInfo(num_pci=1, numa_node=0)
fake_connection = self._get_connection(host_info, pci_info)
self.mock_conn.return_value = fake_connection
# boot one instance with no PCI device to "fill up" NUMA node 0
extra_spec = {
'hw:cpu_policy': 'dedicated',
}
flavor_id = self._create_flavor(vcpu=4, extra_spec=extra_spec)
self._run_build_test(flavor_id)
# now boot one with a PCI device, which should succeed thanks to the
# use of the PCI policy
extra_spec['pci_passthrough:alias'] = '%s:1' % self.ALIAS_NAME
flavor_id = self._create_flavor(extra_spec=extra_spec)
self._run_build_test(flavor_id)
def test_create_servers_with_specific_type(self):
# Regenerate the PCI addresses so both pGPUs now support nvidia-12
connection = self.computes[
self.compute1.host].driver._host.get_connection()
connection.pci_info = fakelibvirt.HostPCIDevicesInfo(
num_pci=0, num_pfs=0, num_vfs=0, num_mdevcap=2,
multiple_gpu_types=True)
# Make a restart to update the Resource Providers
self.compute1 = self.restart_compute_service(self.compute1)
pgpu1_rp_uuid = self._get_provider_uuid_by_name(
self.compute1.host + '_' + fakelibvirt.PGPU1_PCI_ADDR)
pgpu2_rp_uuid = self._get_provider_uuid_by_name(
self.compute1.host + '_' + fakelibvirt.PGPU2_PCI_ADDR)
pgpu1_inventory = self._get_provider_inventory(pgpu1_rp_uuid)
self.assertEqual(16, pgpu1_inventory[orc.VGPU]['total'])
pgpu2_inventory = self._get_provider_inventory(pgpu2_rp_uuid)
self.assertEqual(8, pgpu2_inventory[orc.VGPU]['total'])
# Attach traits to the pGPU RPs
self._set_provider_traits(pgpu1_rp_uuid, ['CUSTOM_NVIDIA_11'])
self._set_provider_traits(pgpu2_rp_uuid, ['CUSTOM_NVIDIA_12'])
expected = {'CUSTOM_NVIDIA_11': fakelibvirt.PGPU1_PCI_ADDR,
'CUSTOM_NVIDIA_12': fakelibvirt.PGPU2_PCI_ADDR}
for trait in expected.keys():
# Add a trait to the flavor
extra_spec = {"resources:VGPU": "1",
"trait:%s" % trait: "required"}
flavor = self._create_flavor(extra_spec=extra_spec)
# Use the new flavor for booting
server = self._create_server(
image_uuid='155d900f-4e14-4e4c-a73d-069cbf4541e6',
flavor_id=flavor, host=self.compute1.host,
expected_state='ACTIVE')
# Get the instance we just created
inst = objects.Instance.get_by_uuid(self.context, server['id'])
# Get the mdevs that were allocated for this instance, we should
# only have one
mdevs = self.compute1.driver._get_all_assigned_mediated_devices(
inst)
self.assertEqual(1, len(mdevs))
# It's a dict of mdev_uuid/instance_uuid pairs, we only care about
# the keys
mdevs = list(mdevs.keys())
# Now get the detailed information about this single mdev
mdev_info = self.compute1.driver._get_mediated_device_information(
libvirt_utils.mdev_uuid2name(mdevs[0]))
# We can be deterministic : since we asked for a specific type,
# we know which pGPU we landed.
self.assertEqual(expected[trait], mdev_info['parent'])
def test_create_server_with_PF(self):
"""Create a server with an SR-IOV PF-type PCI device."""
pci_info = fakelibvirt.HostPCIDevicesInfo()
self.start_compute(pci_info=pci_info)
# create a server
extra_spec = {"pci_passthrough:alias": "%s:1" % self.PFS_ALIAS_NAME}
flavor_id = self._create_flavor(extra_spec=extra_spec)
self._create_server(flavor_id=flavor_id, networks='none')
# ensure the filter was called
self.assertTrue(self.mock_filter.called)
def test_create_server_with_PF(self):
host_info = fakelibvirt.HostInfo(cpu_nodes=2, cpu_sockets=1,
cpu_cores=2, cpu_threads=2,
kB_mem=15740000)
pci_info = fakelibvirt.HostPCIDevicesInfo()
fake_connection = self._get_connection(host_info, pci_info)
self.mock_conn.return_value = fake_connection
# Create a flavor
extra_spec = {"pci_passthrough:alias": "%s:1" % self.PFS_ALIAS_NAME}
flavor_id = self._create_flavor(extra_spec=extra_spec)
self._run_build_test(flavor_id)
def test_get_server_diagnostics_server_with_VF(self):
host_info = fakelibvirt.HostInfo(cpu_nodes=2,
cpu_sockets=1,
cpu_cores=2,
cpu_threads=2,
kB_mem=15740000)
pci_info = fakelibvirt.HostPCIDevicesInfo()
fake_connection = self._get_connection(host_info, pci_info)
self.mock_conn.return_value = fake_connection
# Create a flavor
extra_spec = {"pci_passthrough:alias": "%s:1" % self.VFS_ALIAS_NAME}
flavor_id = self._create_flavor(extra_spec=extra_spec)
if not self.compute_started:
self.compute = self.start_service('compute', host='test_compute0')
self.compute_started = True
# Create server
good_server = self._build_server(
image_uuid='155d900f-4e14-4e4c-a73d-069cbf4541e6',
flavor_id=flavor_id)
good_server['networks'] = [
{
'uuid': base.LibvirtNeutronFixture.network_1['id']
},
{
'uuid': base.LibvirtNeutronFixture.network_4['id']
},
]
post = {'server': good_server}
created_server = self.api.post_server(post)
self._wait_for_state_change(created_server, 'ACTIVE')
diagnostics = self.api.get_server_diagnostics(created_server['id'])
self.assertEqual(
base.LibvirtNeutronFixture.network_1_port_2['mac_address'],
diagnostics['nic_details'][0]['mac_address'])
self.assertEqual(
base.LibvirtNeutronFixture.network_4_port_1['mac_address'],
diagnostics['nic_details'][1]['mac_address'])
self.assertIsNotNone(diagnostics['nic_details'][0]['tx_packets'])
self.assertIsNone(diagnostics['nic_details'][1]['tx_packets'])
def _test_detach_attach(self, first_port_id, second_port_id):
# This test takes two ports that requires PCI claim.
# Starts a compute with one PF and one connected VF.
# Then starts a VM with the first port. Then detach it, then
# re-attach it. These expected to be successful. Then try to attach the
# second port and asserts that it fails as no free PCI device left on
# the host.
host_info = fakelibvirt.HostInfo(cpu_nodes=2,
cpu_sockets=1,
cpu_cores=2,
cpu_threads=2,
kB_mem=15740000)
pci_info = fakelibvirt.HostPCIDevicesInfo(num_pfs=1, num_vfs=1)
fake_connection = self._get_connection(host_info, pci_info)
self.mock_conn.return_value = fake_connection
self.compute = self.start_service('compute', host='test_compute0')
# Create server with a port
server = self._create_server(networks=[{'port': first_port_id}])
updated_port = self.neutron.show_port(first_port_id)['port']
self.assertEqual('test_compute0', updated_port['binding:host_id'])
self.assertIn(first_port_id, self._get_attached_port_ids(server['id']))
self._detach_port(server['id'], first_port_id)
updated_port = self.neutron.show_port(first_port_id)['port']
self.assertIsNone(updated_port['binding:host_id'])
self.assertNotIn(first_port_id,
self._get_attached_port_ids(server['id']))
# Attach back the port
self._attach_port(server['id'], first_port_id)
updated_port = self.neutron.show_port(first_port_id)['port']
self.assertEqual('test_compute0', updated_port['binding:host_id'])
self.assertIn(first_port_id, self._get_attached_port_ids(server['id']))
# Try to attach the second port but no free PCI device left
ex = self.assertRaises(client.OpenStackApiException, self._attach_port,
server['id'], second_port_id)
self.assertEqual(400, ex.response.status_code)
self.assertIn('Failed to claim PCI device', str(ex))
attached_ports = self._get_attached_port_ids(server['id'])
self.assertIn(first_port_id, attached_ports)
self.assertNotIn(second_port_id, attached_ports)
def test_create_server_with_pci_dev_and_numa(self):
"""Verifies that an instance can be booted with cpu pinning and with an
assigned pci device.
"""
self.flags(cpu_dedicated_set='0-7', group='compute')
pci_info = fakelibvirt.HostPCIDevicesInfo(num_pci=1, numa_node=1)
self.start_compute(pci_info=pci_info)
# create a flavor
extra_spec = {
'hw:cpu_policy': 'dedicated',
'pci_passthrough:alias': '%s:1' % self.ALIAS_NAME,
}
flavor_id = self._create_flavor(extra_spec=extra_spec)
self._create_server(flavor_id=flavor_id, networks='none')
def test_create_server_with_VF_no_PF(self, img_mock):
host_info = fakelibvirt.NUMAHostInfo(cpu_nodes=2, cpu_sockets=1,
cpu_cores=2, cpu_threads=2,
kB_mem=15740000)
pci_info = fakelibvirt.HostPCIDevicesInfo(num_pfs=1, num_vfs=4)
fake_connection = self._get_connection(host_info, pci_info)
self.mock_conn.return_value = fake_connection
# Create a flavor
extra_spec_pfs = {"pci_passthrough:alias": "%s:1" %
self.PFS_ALIAS_NAME}
extra_spec_vfs = {"pci_passthrough:alias": "%s:1" %
self.VFS_ALIAS_NAME}
flavor_id_pfs = self._create_flavor(extra_spec=extra_spec_pfs)
flavor_id_vfs = self._create_flavor(extra_spec=extra_spec_vfs)
self._run_build_test(flavor_id_vfs)
self._run_build_test(flavor_id_pfs, end_status='ERROR')
def test_create_server_with_pci_dev_and_numa(self):
"""Verifies that an instance can be booted with cpu pinning and with an
assigned pci device.
"""
host_info = fakelibvirt.HostInfo(cpu_nodes=2, cpu_sockets=1,
cpu_cores=2, cpu_threads=2,
kB_mem=15740000)
pci_info = fakelibvirt.HostPCIDevicesInfo(num_pci=1, numa_node=1)
fake_connection = self._get_connection(host_info, pci_info)
self.mock_conn.return_value = fake_connection
# create a flavor
extra_spec = {
'hw:cpu_policy': 'dedicated',
'pci_passthrough:alias': '%s:1' % self.ALIAS_NAME,
}
flavor_id = self._create_flavor(extra_spec=extra_spec)
self._run_build_test(flavor_id)
def test_create_server_with_VF_no_PF(self):
"""Create a server with a VF and ensure the PF is then reserved."""
pci_info = fakelibvirt.HostPCIDevicesInfo(num_pfs=1, num_vfs=4)
self.start_compute(pci_info=pci_info)
# create a server using the VF
extra_spec_vfs = {'pci_passthrough:alias': f'{self.VFS_ALIAS_NAME}:1'}
flavor_id_vfs = self._create_flavor(extra_spec=extra_spec_vfs)
self._create_server(flavor_id=flavor_id_vfs, networks='none')
# now attempt to build another server, this time using the PF; this
# should fail because the PF is used by an instance
extra_spec_pfs = {'pci_passthrough:alias': f'{self.PFS_ALIAS_NAME}:1'}
flavor_id_pfs = self._create_flavor(extra_spec=extra_spec_pfs)
self._create_server(
flavor_id=flavor_id_pfs,
networks='none',
expected_state='ERROR',
)
def test_create_server_with_pci_dev_and_numa_fails(self):
"""This test ensures that it is not possible to allocated CPU and
memory resources from one NUMA node and a PCI device from another.
"""
self.flags(cpu_dedicated_set='0-7', group='compute')
pci_info = fakelibvirt.HostPCIDevicesInfo(num_pci=1, numa_node=0)
self.start_compute(pci_info=pci_info)
# boot one instance with no PCI device to "fill up" NUMA node 0
extra_spec = {'hw:cpu_policy': 'dedicated'}
flavor_id = self._create_flavor(vcpu=4, extra_spec=extra_spec)
self._create_server(flavor_id=flavor_id, networks='none')
# now boot one with a PCI device, which should fail to boot
extra_spec['pci_passthrough:alias'] = '%s:1' % self.ALIAS_NAME
flavor_id = self._create_flavor(extra_spec=extra_spec)
self._create_server(flavor_id=flavor_id,
networks='none',
expected_state='ERROR')
def start_compute(self, hostname):
hostname = super().start_compute(
pci_info=fakelibvirt.HostPCIDevicesInfo(
num_pci=0,
num_pfs=0,
num_vfs=0,
num_mdevcap=2,
),
hostname=hostname,
)
compute = self.computes[hostname]
rp_uuid = self.compute_rp_uuids[hostname]
rp_uuids = self._get_all_rp_uuids_in_a_tree(rp_uuid)
for rp in rp_uuids:
inventory = self._get_provider_inventory(rp)
if orc.VGPU in inventory:
usage = self._get_provider_usages(rp)
self.assertEqual(16, inventory[orc.VGPU]['total'])
self.assertEqual(0, usage[orc.VGPU])
# Since we haven't created any mdevs yet, we shouldn't find them
self.assertEqual([], compute.driver._get_mediated_devices())
return compute
def test_get_server_diagnostics_server_with_VF(self):
"""Ensure server disagnostics include info on VF-type PCI devices."""
pci_info = fakelibvirt.HostPCIDevicesInfo()
self.start_compute(pci_info=pci_info)
# create the SR-IOV port
self.neutron.create_port({'port': self.neutron.network_4_port_1})
# create a server using the VF and multiple networks
extra_spec = {'pci_passthrough:alias': f'{self.VFS_ALIAS_NAME}:1'}
flavor_id = self._create_flavor(extra_spec=extra_spec)
server = self._create_server(
flavor_id=flavor_id,
networks=[
{
'uuid': base.LibvirtNeutronFixture.network_1['id']
},
{
'port': base.LibvirtNeutronFixture.network_4_port_1['id']
},
],
)
# now check the server diagnostics to ensure the VF-type PCI device is
# attached
diagnostics = self.admin_api.get_server_diagnostics(server['id'])
self.assertEqual(
base.LibvirtNeutronFixture.network_1_port_2['mac_address'],
diagnostics['nic_details'][0]['mac_address'],
)
self.assertIsNotNone(diagnostics['nic_details'][0]['tx_packets'])
self.assertEqual(
base.LibvirtNeutronFixture.network_4_port_1['mac_address'],
diagnostics['nic_details'][1]['mac_address'],
)
self.assertIsNone(diagnostics['nic_details'][1]['tx_packets'])
def _test_policy(self, pci_numa_node, status, policy):
host_info = fakelibvirt.HostInfo(cpu_nodes=2,
cpu_sockets=1,
cpu_cores=2,
cpu_threads=2,
kB_mem=15740000)
pci_info = fakelibvirt.HostPCIDevicesInfo(num_pci=1,
numa_node=pci_numa_node)
fake_connection = self._get_connection(host_info, pci_info)
self.mock_conn.return_value = fake_connection
# only allow cpus on numa node 1 to be used for pinning
self.flags(cpu_dedicated_set='4-7', group='compute')
# request cpu pinning to create a numa toplogy and allow the test to
# force which numa node the vm would have to be pinned too.
extra_spec = {
'hw:cpu_policy': 'dedicated',
'pci_passthrough:alias': '%s:1' % self.ALIAS_NAME,
'hw:pci_numa_affinity_policy': policy
}
flavor_id = self._create_flavor(extra_spec=extra_spec)
self._run_build_test(flavor_id, end_status=status)
def _start_compute_service(self, hostname):
self.fake_connection = self._get_connection(
host_info=fakelibvirt.HostInfo(cpu_nodes=2, kB_mem=8192),
# We want to create two pGPUs but no other PCI devices
pci_info=fakelibvirt.HostPCIDevicesInfo(num_pci=0,
num_pfs=0,
num_vfs=0,
num_mdevcap=2),
hostname=hostname)
self.mock_conn.return_value = self.fake_connection
compute = self.start_service('compute', host=hostname)
rp_uuid = self._get_provider_uuid_by_name(hostname)
rp_uuids = self._get_all_rp_uuids_in_a_tree(rp_uuid)
for rp in rp_uuids:
inventory = self._get_provider_inventory(rp)
if orc.VGPU in inventory:
usage = self._get_provider_usages(rp)
self.assertEqual(16, inventory[orc.VGPU]['total'])
self.assertEqual(0, usage[orc.VGPU])
# Since we haven't created any mdevs yet, we shouldn't find them
self.assertEqual([], compute.driver._get_mediated_devices())
return compute
def _test_policy(self, pci_numa_node, status, policy):
# only allow cpus on numa node 1 to be used for pinning
self.flags(cpu_dedicated_set='4-7', group='compute')
pci_info = fakelibvirt.HostPCIDevicesInfo(num_pci=1,
numa_node=pci_numa_node)
self.start_compute(pci_info=pci_info)
# request cpu pinning to create a numa toplogy and allow the test to
# force which numa node the vm would have to be pinned too.
extra_spec = {
'hw:cpu_policy': 'dedicated',
'pci_passthrough:alias': '%s:1' % self.ALIAS_NAME,
'hw:pci_numa_affinity_policy': policy
}
flavor_id = self._create_flavor(extra_spec=extra_spec)
self._create_server(flavor_id=flavor_id, expected_state=status)
if status == 'ACTIVE':
self.assertTrue(self.mock_filter.called)
else:
# the PciPassthroughFilter should not have been called, since the
# NUMATopologyFilter should have eliminated the filter first
self.assertFalse(self.mock_filter.called)
def test_pci_devices_generation(self):
def _cmp_pci_dev_addr(dev_xml, cmp_addr):
cfgdev = vconfig.LibvirtConfigNodeDevice()
cfgdev.parse_str(dev_xml)
address = "%04x:%02x:%02x.%1x" % (
cfgdev.pci_capability.domain, cfgdev.pci_capability.bus,
cfgdev.pci_capability.slot, cfgdev.pci_capability.function)
self.assertEqual(cmp_addr, address)
pf_xml = """<device>
<name>pci_0000_81_00_0</name>
<path>/sys/devices/pci0000:80/0000:80:01.0/0000:81:00.0</path>
<parent>pci_0000_80_01_0</parent>
<driver>
<name>ixgbe</name>
</driver>
<capability type='pci'>
<domain>0</domain>
<bus>129</bus>
<slot>0</slot>
<function>0</function>
<product id='0x1528'>Ethernet Controller 10-Gigabit X540-AT2</product>
<vendor id='0x8086'>Intel Corporation</vendor>
<capability type='virt_functions'>
<address domain='0x0000' bus='0x81' slot='0x0' function='0x1'/>
</capability>
<iommuGroup number='40'>
<address domain='0x0000' bus='0x81' slot='0x0' function='0x0'/>
</iommuGroup>
<numa node='0'/>
<pci-express>
<link validity='cap' port='0' speed='5' width='8'/>
<link validity='sta' speed='5' width='8'/>
</pci-express>
</capability>
</device>"""
vf_xml = """<device>
<name>pci_0000_81_00_1</name>
<path>/sys/devices/pci0000:80/0000:80:01.0/0000:81:00.1</path>
<parent>pci_0000_80_01_0</parent>
<driver>
<name>ixgbevf</name>
</driver>
<capability type='pci'>
<domain>0</domain>
<bus>129</bus>
<slot>0</slot>
<function>1</function>
<product id='0x1515'>X540 Ethernet Controller Virtual Function</product>
<vendor id='0x8086'>Intel Corporation</vendor>
<capability type='phys_function'>
<address domain='0x0000' bus='0x81' slot='0x0' function='0x0'/>
</capability>
<iommuGroup number='41'>
<address domain='0x0000' bus='0x81' slot='0x0' function='0x1'/>
</iommuGroup>
<numa node='0'/>
<pci-express>
<link validity='cap' port='0' speed='5' width='8'/>
<link validity='sta' speed='5' width='8'/>
</pci-express>
</capability>
</device>"""
# create fake pci devices
pci_info = libvirt.HostPCIDevicesInfo(num_pfs=1, num_vfs=1)
# generate xml for the created pci devices
gen_pf = pci_info.get_device_by_name('pci_0000_81_00_0')
gen_vf = pci_info.get_device_by_name('pci_0000_81_00_1')
self.assertXmlEqual(gen_pf.XMLDesc(0), pf_xml)
self.assertXmlEqual(gen_vf.XMLDesc(0), vf_xml)
# parse the generated xml with a libvirt config class and compare
# device address
_cmp_pci_dev_addr(pf_xml, '0000:81:00.0')
_cmp_pci_dev_addr(vf_xml, '0000:81:00.1')
def test_live_migrate_server_with_neutron(self):
"""Live migrate an instance using a neutron-provisioned SR-IOV VIF.
This should succeed since we support this, via detach and attach of the
PCI device.
"""
# start two compute services with differing PCI device inventory
self.start_compute(hostname='test_compute0',
pci_info=fakelibvirt.HostPCIDevicesInfo(
num_pfs=2, num_vfs=8, numa_node=0))
self.start_compute(hostname='test_compute1',
pci_info=fakelibvirt.HostPCIDevicesInfo(
num_pfs=1, num_vfs=2, numa_node=1))
# create the port
self.neutron.create_port({'port': self.neutron.network_4_port_1})
# create a server using the VF via neutron
extra_spec = {'hw:cpu_policy': 'dedicated'}
flavor_id = self._create_flavor(vcpu=4, extra_spec=extra_spec)
server = self._create_server(
flavor_id=flavor_id,
networks=[
{
'port': base.LibvirtNeutronFixture.network_4_port_1['id']
},
],
host='test_compute0',
)
# our source host should have marked two PCI devices as used, the VF
# and the parent PF, while the future destination is currently unused
self.assertEqual('test_compute0', server['OS-EXT-SRV-ATTR:host'])
self.assertPCIDeviceCounts('test_compute0', total=10, free=8)
self.assertPCIDeviceCounts('test_compute1', total=3, free=3)
# the instance should be on host NUMA node 0, since that's where our
# PCI devices are
host_numa = objects.NUMATopology.obj_from_db_obj(
objects.ComputeNode.get_by_nodename(
self.ctxt,
'test_compute0',
).numa_topology)
self.assertEqual({0, 1, 2, 3}, host_numa.cells[0].pinned_cpus)
self.assertEqual(set(), host_numa.cells[1].pinned_cpus)
# ensure the binding details sent to "neutron" are correct
port = self.neutron.show_port(
base.LibvirtNeutronFixture.network_4_port_1['id'], )['port']
self.assertIn('binding:profile', port)
self.assertEqual(
{
'pci_vendor_info': '8086:1515',
# TODO(stephenfin): Stop relying on a side-effect of how nova
# chooses from multiple PCI devices (apparently the last
# matching one)
'pci_slot': '0000:81:01.4',
'physical_network': 'physnet4',
},
port['binding:profile'],
)
# now live migrate that server
self._live_migrate(server, 'completed')
# we should now have transitioned our usage to the destination, freeing
# up the source in the process
self.assertPCIDeviceCounts('test_compute0', total=10, free=10)
self.assertPCIDeviceCounts('test_compute1', total=3, free=1)
# the instance should now be on host NUMA node 1, since that's where
# our PCI devices are for this second host
host_numa = objects.NUMATopology.obj_from_db_obj(
objects.ComputeNode.get_by_nodename(
self.ctxt,
'test_compute1',
).numa_topology)
self.assertEqual(set(), host_numa.cells[0].pinned_cpus)
self.assertEqual({4, 5, 6, 7}, host_numa.cells[1].pinned_cpus)
# ensure the binding details sent to "neutron" have been updated
port = self.neutron.show_port(
base.LibvirtNeutronFixture.network_4_port_1['id'], )['port']
self.assertIn('binding:profile', port)
self.assertEqual(
{
'pci_vendor_info': '8086:1515',
'pci_slot': '0000:81:00.2',
'physical_network': 'physnet4',
},
port['binding:profile'],
)
def test_cold_migrate_server_with_pci(self):
host_devices = {}
orig_create = nova.virt.libvirt.guest.Guest.create
def fake_create(cls, xml, host):
tree = etree.fromstring(xml)
elem = tree.find('./devices/hostdev/source/address')
hostname = host.get_hostname()
address = (
elem.get('bus'),
elem.get('slot'),
elem.get('function'),
)
if hostname in host_devices:
self.assertNotIn(address, host_devices[hostname])
else:
host_devices[hostname] = []
host_devices[host.get_hostname()].append(address)
return orig_create(xml, host)
self.stub_out(
'nova.virt.libvirt.guest.Guest.create',
fake_create,
)
# start two compute services
for hostname in ('test_compute0', 'test_compute1'):
pci_info = fakelibvirt.HostPCIDevicesInfo(num_pci=2)
self.start_compute(hostname=hostname, pci_info=pci_info)
# boot an instance with a PCI device on each host
extra_spec = {
'pci_passthrough:alias': '%s:1' % self.ALIAS_NAME,
}
flavor_id = self._create_flavor(extra_spec=extra_spec)
server_a = self._create_server(flavor_id=flavor_id,
networks='none',
host='test_compute0')
server_b = self._create_server(flavor_id=flavor_id,
networks='none',
host='test_compute1')
# the instances should have landed on separate hosts; ensure both hosts
# have one used PCI device and one free PCI device
self.assertNotEqual(
server_a['OS-EXT-SRV-ATTR:host'],
server_b['OS-EXT-SRV-ATTR:host'],
)
for hostname in ('test_compute0', 'test_compute1'):
self.assertPCIDeviceCounts(hostname, total=2, free=1)
# TODO(stephenfin): The mock of 'migrate_disk_and_power_off' should
# probably be less...dumb
with mock.patch(
'nova.virt.libvirt.driver.LibvirtDriver'
'.migrate_disk_and_power_off',
return_value='{}',
):
# TODO(stephenfin): Use a helper
self.api.post_server_action(server_a['id'], {'migrate': None})
server_a = self._wait_for_state_change(server_a, 'VERIFY_RESIZE')
# the instances should now be on the same host; ensure the source host
# still has one used PCI device while the destination now has two used
# test_compute0 initially
self.assertEqual(
server_a['OS-EXT-SRV-ATTR:host'],
server_b['OS-EXT-SRV-ATTR:host'],
)
self.assertPCIDeviceCounts('test_compute0', total=2, free=1)
self.assertPCIDeviceCounts('test_compute1', total=2, free=0)
# now, confirm the migration and check our counts once again
self._confirm_resize(server_a)
self.assertPCIDeviceCounts('test_compute0', total=2, free=2)
self.assertPCIDeviceCounts('test_compute1', total=2, free=0)
def test_create_server_after_change_in_nonsriov_pf_to_sriov_pf(self):
# Starts a compute with PF not configured with SRIOV capabilities
# Updates the PF with SRIOV capability and restart the compute service
# Then starts a VM with the sriov port. The VM should be in active
# state with sriov port attached.
# To emulate the device type changing, we first create a
# HostPCIDevicesInfo object with PFs and VFs. Then we make a copy
# and remove the VFs and the virt_function capability. This is
# done to ensure the physical function product id is same in both
# the versions.
pci_info = fakelibvirt.HostPCIDevicesInfo(num_pfs=1, num_vfs=1)
pci_info_no_sriov = copy.deepcopy(pci_info)
# Disable SRIOV capabilties in PF and delete the VFs
self._disable_sriov_in_pf(pci_info_no_sriov)
fake_connection = self._get_connection(pci_info=pci_info_no_sriov,
hostname='test_compute0')
self.mock_conn.return_value = fake_connection
self.compute = self.start_service('compute', host='test_compute0')
ctxt = context.get_admin_context()
pci_devices = objects.PciDeviceList.get_by_compute_node(
ctxt,
objects.ComputeNode.get_by_nodename(
ctxt,
'test_compute0',
).id,
)
self.assertEqual(1, len(pci_devices))
self.assertEqual('type-PCI', pci_devices[0].dev_type)
# Update connection with original pci info with sriov PFs
fake_connection = self._get_connection(pci_info=pci_info,
hostname='test_compute0')
self.mock_conn.return_value = fake_connection
# Restart the compute service
self.restart_compute_service(self.compute)
# Verify if PCI devices are of type type-PF or type-VF
pci_devices = objects.PciDeviceList.get_by_compute_node(
ctxt,
objects.ComputeNode.get_by_nodename(
ctxt,
'test_compute0',
).id,
)
for pci_device in pci_devices:
self.assertIn(pci_device.dev_type, ['type-PF', 'type-VF'])
# create the port
self.neutron.create_port({'port': self.neutron.network_4_port_1})
# create a server using the VF via neutron
flavor_id = self._create_flavor()
self._create_server(
flavor_id=flavor_id,
networks=[
{
'port': base.LibvirtNeutronFixture.network_4_port_1['id']
},
],
)