Merge "Have host look for CPU controller of cgroupsv2 location." into stable/xena
This commit is contained in:
commit
a3e1707eaf
71
nova/tests/fixtures/nova.py
vendored
71
nova/tests/fixtures/nova.py
vendored
@ -1264,6 +1264,77 @@ class PrivsepFixture(fixtures.Fixture):
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nova.privsep.sys_admin_pctxt, 'client_mode', False))
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class CGroupsFixture(fixtures.Fixture):
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"""Mocks checks made for available subsystems on the host's control group.
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The fixture mocks all calls made on the host to verify the capabilities
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provided by its kernel. Through this, one can simulate the underlying
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system hosts work on top of and have tests react to expected outcomes from
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such.
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Use sample:
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>>> cgroups = self.useFixture(CGroupsFixture())
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>>> cgroups = self.useFixture(CGroupsFixture(version=2))
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>>> cgroups = self.useFixture(CGroupsFixture())
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... cgroups.version = 2
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:attr version: Arranges mocks to simulate the host interact with nova
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following the given version of cgroups.
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Available values are:
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- 0: All checks related to cgroups will return False.
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- 1: Checks related to cgroups v1 will return True.
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- 2: Checks related to cgroups v2 will return True.
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Defaults to 1.
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"""
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def __init__(self, version=1):
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self._cpuv1 = None
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self._cpuv2 = None
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self._version = version
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@property
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def version(self):
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return self._version
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@version.setter
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def version(self, value):
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self._version = value
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self._update_mocks()
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def setUp(self):
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super().setUp()
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self._cpuv1 = self.useFixture(fixtures.MockPatch(
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'nova.virt.libvirt.host.Host._has_cgroupsv1_cpu_controller')).mock
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self._cpuv2 = self.useFixture(fixtures.MockPatch(
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'nova.virt.libvirt.host.Host._has_cgroupsv2_cpu_controller')).mock
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self._update_mocks()
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def _update_mocks(self):
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if not self._cpuv1:
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return
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if not self._cpuv2:
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return
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if self.version == 0:
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self._cpuv1.return_value = False
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self._cpuv2.return_value = False
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return
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if self.version == 1:
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self._cpuv1.return_value = True
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self._cpuv2.return_value = False
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return
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if self.version == 2:
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self._cpuv1.return_value = False
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self._cpuv2.return_value = True
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return
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raise ValueError(f"Unknown cgroups version: '{self.version}'.")
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class NoopQuotaDriverFixture(fixtures.Fixture):
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"""A fixture to run tests using the NoopQuotaDriver.
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@ -42,6 +42,7 @@ class ServersTestBase(integrated_helpers._IntegratedTestBase):
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super(ServersTestBase, self).setUp()
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self.useFixture(nova_fixtures.LibvirtImageBackendFixture())
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self.useFixture(nova_fixtures.CGroupsFixture())
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self.libvirt = self.useFixture(nova_fixtures.LibvirtFixture())
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self.useFixture(nova_fixtures.OSBrickFixture())
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@ -421,6 +421,7 @@ class _LibvirtEvacuateTest(integrated_helpers.InstanceHelperMixin):
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self.useFixture(nova_fixtures.NeutronFixture(self))
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self.useFixture(nova_fixtures.GlanceFixture(self))
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self.useFixture(func_fixtures.PlacementFixture())
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self.useFixture(nova_fixtures.CGroupsFixture())
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fake_network.set_stub_network_methods(self)
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api_fixture = self.useFixture(
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@ -75,6 +75,7 @@ class VPMEMTestBase(integrated_helpers.LibvirtProviderUsageBaseTestCase):
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'nova.privsep.libvirt.get_pmem_namespaces',
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return_value=self.fake_pmem_namespaces))
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self.useFixture(nova_fixtures.LibvirtImageBackendFixture())
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self.useFixture(nova_fixtures.CGroupsFixture())
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self.useFixture(fixtures.MockPatch(
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'nova.virt.libvirt.LibvirtDriver._get_local_gb_info',
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return_value={'total': 128,
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@ -47,6 +47,7 @@ class TestSerialConsoleLiveMigrate(test.TestCase):
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'nova.virt.libvirt.guest.libvirt',
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fakelibvirt))
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self.useFixture(nova_fixtures.LibvirtFixture())
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self.useFixture(nova_fixtures.CGroupsFixture())
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self.admin_api = api_fixture.admin_api
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self.api = api_fixture.api
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@ -741,6 +741,7 @@ class LibvirtConnTestCase(test.NoDBTestCase,
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imagebackend.Image._get_driver_format)
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self.libvirt = self.useFixture(nova_fixtures.LibvirtFixture())
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self.cgroups = self.useFixture(nova_fixtures.CGroupsFixture())
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# ensure tests perform the same on all host architectures; this is
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# already done by the fakelibvirt fixture but we want to change the
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@ -2922,9 +2923,7 @@ class LibvirtConnTestCase(test.NoDBTestCase,
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'fake-instance-numa-topology',
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'fake-flavor', 'fake-image-meta').obj_to_primitive())
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@mock.patch.object(
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host.Host, "is_cpu_control_policy_capable", return_value=True)
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def test_get_guest_config_numa_host_instance_fits(self, is_able):
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def test_get_guest_config_numa_host_instance_fits(self):
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self.flags(cpu_shared_set=None, cpu_dedicated_set=None,
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group='compute')
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instance_ref = objects.Instance(**self.test_instance)
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@ -2961,9 +2960,7 @@ class LibvirtConnTestCase(test.NoDBTestCase,
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@mock.patch('nova.privsep.utils.supports_direct_io',
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new=mock.Mock(return_value=True))
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@mock.patch.object(
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host.Host, "is_cpu_control_policy_capable", return_value=True)
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def test_get_guest_config_numa_host_instance_no_fit(self, is_able):
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def test_get_guest_config_numa_host_instance_no_fit(self):
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instance_ref = objects.Instance(**self.test_instance)
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image_meta = objects.ImageMeta.from_dict(self.test_image_meta)
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flavor = objects.Flavor(memory_mb=4096, vcpus=4, root_gb=496,
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@ -3354,10 +3351,7 @@ class LibvirtConnTestCase(test.NoDBTestCase,
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self._test_get_guest_memory_backing_config,
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host_topology, inst_topology, numa_tune)
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@mock.patch.object(
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host.Host, "is_cpu_control_policy_capable", return_value=True)
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def test_get_guest_config_numa_host_instance_pci_no_numa_info(
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self, is_able):
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def test_get_guest_config_numa_host_instance_pci_no_numa_info(self):
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self.flags(cpu_shared_set='3', cpu_dedicated_set=None,
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group='compute')
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@ -3406,9 +3400,7 @@ class LibvirtConnTestCase(test.NoDBTestCase,
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@mock.patch('nova.privsep.utils.supports_direct_io',
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new=mock.Mock(return_value=True))
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@mock.patch.object(
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host.Host, "is_cpu_control_policy_capable", return_value=True)
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def test_get_guest_config_numa_host_instance_2pci_no_fit(self, is_able):
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def test_get_guest_config_numa_host_instance_2pci_no_fit(self):
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self.flags(cpu_shared_set='3', cpu_dedicated_set=None,
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group='compute')
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instance_ref = objects.Instance(**self.test_instance)
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@ -3516,10 +3508,7 @@ class LibvirtConnTestCase(test.NoDBTestCase,
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exception.NUMATopologyUnsupported,
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None)
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@mock.patch.object(
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host.Host, "is_cpu_control_policy_capable", return_value=True)
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def test_get_guest_config_numa_host_instance_fit_w_cpu_pinset(
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self, is_able):
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def test_get_guest_config_numa_host_instance_fit_w_cpu_pinset(self):
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self.flags(cpu_shared_set='2-3', cpu_dedicated_set=None,
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group='compute')
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@ -3557,9 +3546,7 @@ class LibvirtConnTestCase(test.NoDBTestCase,
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self.assertEqual(0, len(cfg.cputune.vcpupin))
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self.assertIsNone(cfg.cpu.numa)
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@mock.patch.object(
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host.Host, "is_cpu_control_policy_capable", return_value=True)
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def test_get_guest_config_non_numa_host_instance_topo(self, is_able):
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def test_get_guest_config_non_numa_host_instance_topo(self):
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instance_topology = objects.InstanceNUMATopology(cells=[
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objects.InstanceNUMACell(
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id=0, cpuset=set([0]), pcpuset=set(), memory=1024),
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@ -3606,9 +3593,7 @@ class LibvirtConnTestCase(test.NoDBTestCase,
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self.assertEqual(instance_cell.memory * units.Ki,
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numa_cfg_cell.memory)
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@mock.patch.object(
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host.Host, "is_cpu_control_policy_capable", return_value=True)
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def test_get_guest_config_numa_host_instance_topo(self, is_able):
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def test_get_guest_config_numa_host_instance_topo(self):
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self.flags(cpu_shared_set='0-5', cpu_dedicated_set=None,
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group='compute')
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@ -6992,9 +6977,7 @@ class LibvirtConnTestCase(test.NoDBTestCase,
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[],
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image_meta, disk_info)
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@mock.patch.object(
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host.Host, "is_cpu_control_policy_capable", return_value=True)
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def test_guest_cpu_shares_with_multi_vcpu(self, is_able):
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def test_guest_cpu_shares_with_multi_vcpu(self):
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self.flags(virt_type='kvm', group='libvirt')
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drvr = libvirt_driver.LibvirtDriver(fake.FakeVirtAPI(), True)
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@ -7012,9 +6995,7 @@ class LibvirtConnTestCase(test.NoDBTestCase,
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self.assertEqual(4096, cfg.cputune.shares)
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@mock.patch.object(
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host.Host, "is_cpu_control_policy_capable", return_value=True)
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def test_get_guest_config_with_cpu_quota(self, is_able):
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def test_get_guest_config_with_cpu_quota(self):
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self.flags(virt_type='kvm', group='libvirt')
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drvr = libvirt_driver.LibvirtDriver(fake.FakeVirtAPI(), True)
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@ -7350,9 +7331,7 @@ class LibvirtConnTestCase(test.NoDBTestCase,
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self.flags(images_type='rbd', group='libvirt')
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self._test_get_guest_config_disk_cachemodes('rbd')
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@mock.patch.object(
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host.Host, "is_cpu_control_policy_capable", return_value=True)
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def test_get_guest_config_with_bogus_cpu_quota(self, is_able):
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def test_get_guest_config_with_bogus_cpu_quota(self):
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self.flags(virt_type='kvm', group='libvirt')
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drvr = libvirt_driver.LibvirtDriver(fake.FakeVirtAPI(), True)
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@ -7370,9 +7349,10 @@ class LibvirtConnTestCase(test.NoDBTestCase,
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drvr._get_guest_config,
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instance_ref, [], image_meta, disk_info)
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@mock.patch.object(
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host.Host, "is_cpu_control_policy_capable", return_value=False)
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def test_get_update_guest_cputune(self, is_able):
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def test_get_update_guest_cputune(self):
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# No CPU controller on the host
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self.cgroups.version = 0
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drvr = libvirt_driver.LibvirtDriver(fake.FakeVirtAPI(), True)
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instance_ref = objects.Instance(**self.test_instance)
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instance_ref.flavor.extra_specs = {'quota:cpu_shares': '10000',
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@ -21504,6 +21484,7 @@ class LibvirtDriverTestCase(test.NoDBTestCase, TraitsComparisonMixin):
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self.flags(sysinfo_serial="none", group="libvirt")
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self.flags(instances_path=self.useFixture(fixtures.TempDir()).path)
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self.useFixture(nova_fixtures.LibvirtFixture())
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self.useFixture(nova_fixtures.CGroupsFixture())
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os_vif.initialize()
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self.drvr = libvirt_driver.LibvirtDriver(
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@ -1475,25 +1475,59 @@ Active: 8381604 kB
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self.host.compare_cpu("cpuxml")
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mock_compareCPU.assert_called_once_with("cpuxml", 0)
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def test_is_cpu_control_policy_capable_ok(self):
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m = mock.mock_open(
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read_data="""cg /cgroup/cpu,cpuacct cg opt1,cpu,opt3 0 0
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cg /cgroup/memory cg opt1,opt2 0 0
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""")
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with mock.patch('builtins.open', m, create=True):
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def test_is_cpu_control_policy_capable_via_neither(self):
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self.useFixture(nova_fixtures.CGroupsFixture(version=0))
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self.assertFalse(self.host.is_cpu_control_policy_capable())
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def test_is_cpu_control_policy_capable_via_cgroupsv1(self):
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self.useFixture(nova_fixtures.CGroupsFixture(version=1))
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self.assertTrue(self.host.is_cpu_control_policy_capable())
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def test_is_cpu_control_policy_capable_ko(self):
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m = mock.mock_open(
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read_data="""cg /cgroup/cpu,cpuacct cg opt1,opt2,opt3 0 0
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cg /cgroup/memory cg opt1,opt2 0 0
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""")
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with mock.patch('builtins.open', m, create=True):
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self.assertFalse(self.host.is_cpu_control_policy_capable())
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def test_is_cpu_control_policy_capable_via_cgroupsv2(self):
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self.useFixture(nova_fixtures.CGroupsFixture(version=2))
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self.assertTrue(self.host.is_cpu_control_policy_capable())
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@mock.patch('builtins.open', side_effect=IOError)
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def test_is_cpu_control_policy_capable_ioerror(self, mock_open):
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self.assertFalse(self.host.is_cpu_control_policy_capable())
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def test_has_cgroupsv1_cpu_controller_ok(self):
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m = mock.mock_open(
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read_data=(
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"cg /cgroup/cpu,cpuacct cg opt1,cpu,opt3 0 0"
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"cg /cgroup/memory cg opt1,opt2 0 0"
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)
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)
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with mock.patch("builtins.open", m, create=True):
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self.assertTrue(self.host._has_cgroupsv1_cpu_controller())
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def test_has_cgroupsv1_cpu_controller_ko(self):
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m = mock.mock_open(
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read_data=(
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"cg /cgroup/cpu,cpuacct cg opt1,opt2,opt3 0 0"
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"cg /cgroup/memory cg opt1,opt2 0 0"
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)
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)
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with mock.patch("builtins.open", m, create=True):
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self.assertFalse(self.host._has_cgroupsv1_cpu_controller())
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@mock.patch("builtins.open", side_effect=IOError)
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def test_has_cgroupsv1_cpu_controller_ioerror(self, _):
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self.assertFalse(self.host._has_cgroupsv1_cpu_controller())
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def test_has_cgroupsv2_cpu_controller_ok(self):
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m = mock.mock_open(
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read_data="cpuset cpu io memory hugetlb pids rdma misc"
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)
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with mock.patch("builtins.open", m, create=True):
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self.assertTrue(self.host._has_cgroupsv2_cpu_controller())
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def test_has_cgroupsv2_cpu_controller_ko(self):
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m = mock.mock_open(
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read_data="memory pids"
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)
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with mock.patch("builtins.open", m, create=True):
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self.assertFalse(self.host._has_cgroupsv2_cpu_controller())
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@mock.patch("builtins.open", side_effect=IOError)
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def test_has_cgroupsv2_cpu_controller_ioerror(self, _):
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self.assertFalse(self.host._has_cgroupsv2_cpu_controller())
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def test_get_canonical_machine_type(self):
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# this test relies on configuration from the FakeLibvirtFixture
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|
@ -831,6 +831,7 @@ class LibvirtConnTestCase(_VirtDriverTestCase, test.TestCase):
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# This is needed for the live migration tests which spawn off the
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# operation for monitoring.
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self.useFixture(nova_fixtures.SpawnIsSynchronousFixture())
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self.useFixture(nova_fixtures.CGroupsFixture())
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# When destroying an instance, os-vif will try to execute some commands
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# which hang tests so let's just stub out the unplug call to os-vif
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# since we don't care about it.
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@ -1462,15 +1462,44 @@ class Host(object):
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CONFIG_CGROUP_SCHED may be disabled in some kernel configs to
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improve scheduler latency.
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"""
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return self._has_cgroupsv1_cpu_controller() or \
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self._has_cgroupsv2_cpu_controller()
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def _has_cgroupsv1_cpu_controller(self):
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LOG.debug(f"Searching host: '{self.get_hostname()}' "
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"for CPU controller through CGroups V1...")
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try:
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with open("/proc/self/mounts", "r") as fd:
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for line in fd.readlines():
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# mount options and split options
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bits = line.split()[3].split(",")
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if "cpu" in bits:
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LOG.debug("CPU controller found on host.")
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return True
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LOG.debug("CPU controller missing on host.")
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return False
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except IOError:
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except IOError as ex:
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LOG.debug(f"Search failed due to: '{ex}'. "
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"Maybe the host is not running under CGroups V1. "
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"Deemed host to be missing controller by this approach.")
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return False
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def _has_cgroupsv2_cpu_controller(self):
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LOG.debug(f"Searching host: '{self.get_hostname()}' "
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"for CPU controller through CGroups V2...")
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try:
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with open("/sys/fs/cgroup/cgroup.controllers", "r") as fd:
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for line in fd.readlines():
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bits = line.split()
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if "cpu" in bits:
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LOG.debug("CPU controller found on host.")
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return True
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LOG.debug("CPU controller missing on host.")
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return False
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except IOError as ex:
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LOG.debug(f"Search failed due to: '{ex}'. "
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"Maybe the host is not running under CGroups V2. "
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"Deemed host to be missing controller by this approach.")
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return False
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def get_canonical_machine_type(self, arch, machine) -> str:
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|
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