openstack/nova
Code Issues Proposed changes

Merge "libvirt: add a new live_migration_tunnelled config"

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Jenkins 2016-02-03 03:26:52 +00:00 committed by Gerrit Code Review
commit 69aaeecb9e
3 changed files with 94 additions and 0 deletions
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47
nova/tests/unit/virt/libvirt/test_driver.py
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@ -1073,6 +1073,53 @@ class LibvirtConnTestCase(test.NoDBTestCase):
msg = mock_log.warning.call_args_list[3]
self.assertIn('Removing the VIR_MIGRATE_PERSIST_DEST flag', msg[0][0])
@mock.patch('nova.virt.libvirt.driver.LOG')
def test_live_migration_tunnelled_true(self, mock_log):
self.flags(live_migration_tunnelled=True, group='libvirt')
self._do_test_parse_migration_flags(
lm_config=('VIR_MIGRATE_PEER2PEER, VIR_MIGRATE_UNDEFINE_SOURCE, '
'VIR_MIGRATE_LIVE'),
bm_config=('VIR_MIGRATE_PEER2PEER, VIR_MIGRATE_UNDEFINE_SOURCE, '
'VIR_MIGRATE_LIVE, VIR_MIGRATE_NON_SHARED_INC'),
lm_expected=(libvirt_driver.libvirt.VIR_MIGRATE_LIVE |
libvirt_driver.libvirt.VIR_MIGRATE_PEER2PEER |
libvirt_driver.libvirt.VIR_MIGRATE_UNDEFINE_SOURCE |
libvirt_driver.libvirt.VIR_MIGRATE_TUNNELLED),
bm_expected=(libvirt_driver.libvirt.VIR_MIGRATE_LIVE |
libvirt_driver.libvirt.VIR_MIGRATE_PEER2PEER |
libvirt_driver.libvirt.VIR_MIGRATE_UNDEFINE_SOURCE |
libvirt_driver.libvirt.VIR_MIGRATE_NON_SHARED_INC |
libvirt_driver.libvirt.VIR_MIGRATE_TUNNELLED))
msg = mock_log.warning.call_args_list[0]
self.assertIn('does not contain the VIR_MIGRATE_TUNNELLED', msg[0][0])
msg = mock_log.warning.call_args_list[1]
self.assertIn('does not contain the VIR_MIGRATE_TUNNELLED', msg[0][0])
@mock.patch('nova.virt.libvirt.driver.LOG')
def test_live_migration_tunnelled_false(self, mock_log):
self.flags(live_migration_tunnelled=False, group='libvirt')
self._do_test_parse_migration_flags(
lm_config=('VIR_MIGRATE_PEER2PEER, VIR_MIGRATE_UNDEFINE_SOURCE, '
'VIR_MIGRATE_LIVE, VIR_MIGRATE_TUNNELLED'),
bm_config=('VIR_MIGRATE_PEER2PEER, VIR_MIGRATE_UNDEFINE_SOURCE, '
'VIR_MIGRATE_LIVE, VIR_MIGRATE_NON_SHARED_INC, '
'VIR_MIGRATE_TUNNELLED'),
lm_expected=(libvirt_driver.libvirt.VIR_MIGRATE_LIVE |
libvirt_driver.libvirt.VIR_MIGRATE_PEER2PEER |
libvirt_driver.libvirt.VIR_MIGRATE_UNDEFINE_SOURCE),
bm_expected=(libvirt_driver.libvirt.VIR_MIGRATE_LIVE |
libvirt_driver.libvirt.VIR_MIGRATE_PEER2PEER |
libvirt_driver.libvirt.VIR_MIGRATE_UNDEFINE_SOURCE |
libvirt_driver.libvirt.VIR_MIGRATE_NON_SHARED_INC))
msg = mock_log.warning.call_args_list[0]
self.assertIn('contains the VIR_MIGRATE_TUNNELLED flag', msg[0][0])
msg = mock_log.warning.call_args_list[1]
self.assertIn('contains the VIR_MIGRATE_TUNNELLED flag', msg[0][0])
@mock.patch('nova.utils.get_image_from_system_metadata')
@mock.patch.object(host.Host,
'has_min_version', return_value=True)

40
nova/virt/libvirt/driver.py
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@ -170,6 +170,16 @@ libvirt_opts = [
'VIR_MIGRATE_LIVE, VIR_MIGRATE_TUNNELLED, '
'VIR_MIGRATE_NON_SHARED_INC',
help='Migration flags to be set for block migration'),
cfg.BoolOpt('live_migration_tunnelled',
help='Whether to use tunnelled migration, where migration '
'data is transported over the libvirtd connection. If '
'True, we use the VIR_MIGRATE_TUNNELLED migration flag, '
'avoiding the need to configure the network to allow '
'direct hypervisor to hypervisor communication. If '
'False, use the native transport. If not set, Nova '
'will choose a sensible default based on, for example '
'the availability of native encryption support in the '
'hypervisor.'),
cfg.IntOpt('live_migration_bandwidth',
default=0,
help='Maximum bandwidth(in MiB/s) to be used during migration. '
@ -721,6 +731,31 @@ class LibvirtDriver(driver.ComputeDriver):
return (live_migration_flags, block_migration_flags)
def _handle_live_migration_tunnelled(self, migration_flags, config_name):
if CONF.libvirt.live_migration_tunnelled is None:
return migration_flags
if CONF.libvirt.live_migration_tunnelled:
if (migration_flags & libvirt.VIR_MIGRATE_TUNNELLED) == 0:
LOG.warning(_LW('The %(config_name)s config option does not '
'contain the VIR_MIGRATE_TUNNELLED flag but '
'the live_migration_tunnelled is set to True '
'which causes VIR_MIGRATE_TUNNELLED to be '
'set'),
{'config_name': config_name})
migration_flags |= libvirt.VIR_MIGRATE_TUNNELLED
else:
if (migration_flags & libvirt.VIR_MIGRATE_TUNNELLED) != 0:
LOG.warning(_LW('The %(config_name)s config option contains '
'the VIR_MIGRATE_TUNNELLED flag but the '
'live_migration_tunnelled is set to False '
'which causes VIR_MIGRATE_TUNNELLED to be '
'unset'),
{'config_name': config_name})
migration_flags &= ~libvirt.VIR_MIGRATE_TUNNELLED
return migration_flags
def _parse_migration_flags(self):
def str2sum(str_val):
logical_sum = 0
@ -747,6 +782,11 @@ class LibvirtDriver(driver.ComputeDriver):
block_migration_flags) = self._check_block_migration_flags(
live_migration_flags, block_migration_flags)
live_migration_flags = self._handle_live_migration_tunnelled(
live_migration_flags, live_config_name)
block_migration_flags = self._handle_live_migration_tunnelled(
block_migration_flags, block_config_name)
self._live_migration_flags = live_migration_flags
self._block_migration_flags = block_migration_flags

7
releasenotes/notes/libvirt-live-migration-new-tunneled-option-d7ebb1eb1e95e683.yaml Normal file
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@ -0,0 +1,7 @@
---
features:
- The libvirt driver now has a live_migration_tunnelled
configuration option which should be used where the
VIR_MIGRATE_TUNNELLED flag would previously have been
set or unset in the live_migration_flag and
block_migration_flag configuration options.