openstack/nova
Code Issues Proposed changes

libvirt: drop MIN_LIBVIRT_POSTCOPY_VERSION

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Change I408baef12358a83921c4693b847a692f6c19e36f in Stein
bumped the minimum required version of libvirt to 3.0.0
so we can drop the minimum version check for post-copy
support along with the related unit tests.

While in here, this fixes a typo in the help text for the
live_migration_permit_post_copy config option.

Change-Id: Id55fbb44eec67cba18293deb25ba4d54fbfd83bc
This commit is contained in:
Matt Riedemann 2019-04-03 12:35:22 -04:00
parent 357da989c1
commit 3bcfb15a89
3 changed files with 7 additions and 62 deletions
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2
nova/conf/libvirt.py
View File

@ -423,7 +423,7 @@ The live-migration force complete API also uses post-copy when permitted. If
post-copy mode is not available, force complete falls back to pausing the VM
to ensure the live-migration operation will complete.
When using post-copy mode, if the source and destination hosts loose network
When using post-copy mode, if the source and destination hosts lose network
connectivity, the VM being live-migrated will need to be rebooted. For more
details, please see the Administration guide.

47
nova/tests/unit/virt/libvirt/test_driver.py
View File

@ -1297,8 +1297,7 @@ class LibvirtConnTestCase(test.NoDBTestCase,
libvirt_driver.libvirt.VIR_MIGRATE_NON_SHARED_INC |
libvirt_driver.libvirt.VIR_MIGRATE_TLS))
@mock.patch.object(host.Host, 'has_min_version', return_value=True)
def test_live_migration_permit_postcopy_true(self, host):
def test_live_migration_permit_postcopy_true(self):
self.flags(live_migration_permit_post_copy=True, group='libvirt')
self._do_test_parse_migration_flags(
lm_expected=(libvirt_driver.libvirt.VIR_MIGRATE_UNDEFINE_SOURCE |
@ -1313,8 +1312,7 @@ class LibvirtConnTestCase(test.NoDBTestCase,
libvirt_driver.libvirt.VIR_MIGRATE_NON_SHARED_INC |
libvirt_driver.libvirt.VIR_MIGRATE_POSTCOPY))
@mock.patch.object(host.Host, 'has_min_version', return_value=True)
def test_live_migration_permit_auto_converge_true(self, host):
def test_live_migration_permit_auto_converge_true(self):
self.flags(live_migration_permit_auto_converge=True, group='libvirt')
self._do_test_parse_migration_flags(
lm_expected=(libvirt_driver.libvirt.VIR_MIGRATE_UNDEFINE_SOURCE |
@ -1329,9 +1327,7 @@ class LibvirtConnTestCase(test.NoDBTestCase,
libvirt_driver.libvirt.VIR_MIGRATE_NON_SHARED_INC |
libvirt_driver.libvirt.VIR_MIGRATE_AUTO_CONVERGE))
@mock.patch.object(host.Host, 'has_min_version', return_value=True)
def test_live_migration_permit_auto_converge_and_post_copy_true(self,
host):
def test_live_migration_permit_auto_converge_and_post_copy_true(self):
self.flags(live_migration_permit_auto_converge=True, group='libvirt')
self.flags(live_migration_permit_post_copy=True, group='libvirt')
self._do_test_parse_migration_flags(
@ -1347,43 +1343,6 @@ class LibvirtConnTestCase(test.NoDBTestCase,
libvirt_driver.libvirt.VIR_MIGRATE_NON_SHARED_INC |
libvirt_driver.libvirt.VIR_MIGRATE_POSTCOPY))
@mock.patch.object(host.Host, 'has_min_version', return_value=False)
def test_live_migration_auto_converge_and_post_copy_true_old_libvirt(
self, min_ver):
self.flags(live_migration_permit_auto_converge=True, group='libvirt')
self.flags(live_migration_permit_post_copy=True, group='libvirt')
self._do_test_parse_migration_flags(
lm_expected=(libvirt_driver.libvirt.VIR_MIGRATE_UNDEFINE_SOURCE |
libvirt_driver.libvirt.VIR_MIGRATE_PERSIST_DEST |
libvirt_driver.libvirt.VIR_MIGRATE_PEER2PEER |
libvirt_driver.libvirt.VIR_MIGRATE_LIVE |
libvirt_driver.libvirt.VIR_MIGRATE_AUTO_CONVERGE),
bm_expected=(libvirt_driver.libvirt.VIR_MIGRATE_UNDEFINE_SOURCE |
libvirt_driver.libvirt.VIR_MIGRATE_PERSIST_DEST |
libvirt_driver.libvirt.VIR_MIGRATE_PEER2PEER |
libvirt_driver.libvirt.VIR_MIGRATE_LIVE |
libvirt_driver.libvirt.VIR_MIGRATE_NON_SHARED_INC |
libvirt_driver.libvirt.VIR_MIGRATE_AUTO_CONVERGE))
min_ver.assert_called_with(
lv_ver=libvirt_driver.MIN_LIBVIRT_POSTCOPY_VERSION)
@mock.patch.object(host.Host, 'has_min_version', return_value=False)
def test_live_migration_permit_postcopy_true_old_libvirt(self, host):
self.flags(live_migration_permit_post_copy=True, group='libvirt')
self._do_test_parse_migration_flags(
lm_expected=(libvirt_driver.libvirt.VIR_MIGRATE_UNDEFINE_SOURCE |
libvirt_driver.libvirt.VIR_MIGRATE_PERSIST_DEST |
libvirt_driver.libvirt.VIR_MIGRATE_PEER2PEER |
libvirt_driver.libvirt.VIR_MIGRATE_LIVE),
bm_expected=(libvirt_driver.libvirt.VIR_MIGRATE_UNDEFINE_SOURCE |
libvirt_driver.libvirt.VIR_MIGRATE_PERSIST_DEST |
libvirt_driver.libvirt.VIR_MIGRATE_PEER2PEER |
libvirt_driver.libvirt.VIR_MIGRATE_LIVE |
libvirt_driver.libvirt.VIR_MIGRATE_NON_SHARED_INC))
def test_live_migration_permit_postcopy_false(self):
self._do_test_parse_migration_flags(
lm_expected=(libvirt_driver.libvirt.VIR_MIGRATE_UNDEFINE_SOURCE |

18
nova/virt/libvirt/driver.py
View File

@ -247,9 +247,6 @@ QEMU_MAX_SERIAL_PORTS = 4
# Qemu supports 4 serial consoles, we remove 1 because of the PTY one defined
ALLOWED_QEMU_SERIAL_PORTS = QEMU_MAX_SERIAL_PORTS - 1
# libvirt postcopy support
MIN_LIBVIRT_POSTCOPY_VERSION = (1, 3, 3)
MIN_LIBVIRT_OTHER_ARCH = {
fields.Architecture.AARCH64: MIN_LIBVIRT_KVM_AARCH64_VERSION,
}
@ -719,25 +716,17 @@ class LibvirtDriver(driver.ComputeDriver):
migration_flags |= libvirt.VIR_MIGRATE_TLS
return migration_flags
def _is_post_copy_available(self):
return self._host.has_min_version(lv_ver=MIN_LIBVIRT_POSTCOPY_VERSION)
def _is_native_luks_available(self):
return self._host.has_min_version(MIN_LIBVIRT_LUKS_VERSION,
MIN_QEMU_LUKS_VERSION)
def _handle_live_migration_post_copy(self, migration_flags):
if CONF.libvirt.live_migration_permit_post_copy:
if self._is_post_copy_available():
migration_flags |= libvirt.VIR_MIGRATE_POSTCOPY
else:
LOG.info('The live_migration_permit_post_copy is set '
'to True, but it is not supported.')
return migration_flags
def _handle_live_migration_auto_converge(self, migration_flags):
if (self._is_post_copy_available() and
(migration_flags & libvirt.VIR_MIGRATE_POSTCOPY) != 0):
if self._is_post_copy_enabled(migration_flags):
LOG.info('The live_migration_permit_post_copy is set to '
'True and post copy live migration is available '
'so auto-converge will not be in use.')
@ -8062,10 +8051,7 @@ class LibvirtDriver(driver.ComputeDriver):
instance=instance)
def _is_post_copy_enabled(self, migration_flags):
if self._is_post_copy_available():
if (migration_flags & libvirt.VIR_MIGRATE_POSTCOPY) != 0:
return True
return False
return (migration_flags & libvirt.VIR_MIGRATE_POSTCOPY) != 0
def live_migration_force_complete(self, instance):
try: