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Merge "Added cold VM migration support"

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This commit is contained in:
Jenkins
2016-05-27 12:33:46 +00:00
committed by Gerrit Code Review
parent b9b505a518 388ef9f11c
commit 3b88e37680
2 changed files with 79 additions and 13 deletions
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39
watcher/applier/actions/migration.py
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@@ -31,27 +31,24 @@ LOG = log.getLogger(__name__)
class Migrate(base.BaseAction):
"""Live-Migrates a server to a destination nova-compute host
"""Migrates a server to a destination nova-compute host
This action will allow you to migrate a server to another compute
destination host. As of now, only live migration can be performed using
this action.
.. If either host uses shared storage, you can use ``live``
.. as ``migration_type``. If both source and destination hosts provide
.. local disks, you can set the block_migration parameter to True (not
.. supported for yet).
destination host.
Migration type 'live' can only be used for migrating active VMs.
Migration type 'cold' can be used for migrating non-active VMs
as well active VMs, which will be shut down while migrating.
The action schema is::
schema = Schema({
'resource_id': str, # should be a UUID
'migration_type': str, # choices -> "live" only
'migration_type': str, # choices -> "live", "cold"
'dst_hypervisor': str,
'src_hypervisor': str,
})
The `resource_id` is the UUID of the server to migrate. Only live migration
is supported.
The `resource_id` is the UUID of the server to migrate.
The `src_hypervisor` and `dst_hypervisor` parameters are respectively the
source and the destination compute hostname (list of available compute
hosts is returned by this command: ``nova service-list --binary
@@ -61,6 +58,7 @@ class Migrate(base.BaseAction):
# input parameters constants
MIGRATION_TYPE = 'migration_type'
LIVE_MIGRATION = 'live'
COLD_MIGRATION = 'cold'
DST_HYPERVISOR = 'dst_hypervisor'
SRC_HYPERVISOR = 'src_hypervisor'
@@ -77,7 +75,8 @@ class Migrate(base.BaseAction):
voluptuous.Required(self.RESOURCE_ID): self.check_resource_id,
voluptuous.Required(self.MIGRATION_TYPE,
default=self.LIVE_MIGRATION):
voluptuous.Any(*[self.LIVE_MIGRATION]),
voluptuous.Any(*[self.LIVE_MIGRATION,
self.COLD_MIGRATION]),
voluptuous.Required(self.DST_HYPERVISOR):
voluptuous.All(voluptuous.Any(*six.string_types),
voluptuous.Length(min=1)),
@@ -127,14 +126,30 @@ class Migrate(base.BaseAction):
return result
def _cold_migrate_instance(self, nova, destination):
result = None
try:
result = nova.watcher_non_live_migrate_instance(
instance_id=self.instance_uuid,
dest_hostname=destination)
except Exception as exc:
LOG.exception(exc)
LOG.critical(_LC("Unexpected error occured. Migration failed for"
"instance %s. Leaving instance on previous "
"host."), self.instance_uuid)
return result
def migrate(self, destination):
nova = nova_helper.NovaHelper(osc=self.osc)
LOG.debug("Migrate instance %s to %s", self.instance_uuid,
destination)
instance = nova.find_instance(self.instance_uuid)
if instance:
if self.migration_type == 'live':
if self.migration_type == self.LIVE_MIGRATION:
return self._live_migrate_instance(nova, destination)
elif self.migration_type == self.COLD_MIGRATION:
return self._cold_migrate_instance(nova, destination)
else:
raise exception.Invalid(
message=(_('Migration of type %(migration_type)s is not '