def _get_compute_node(self, context):
"""Returns compute node for the host and nodename."""
try:
return objects.ComputeNode.get_by_host_and_nodename(
context, self.host, utils.get_node_name(self.host))
except exception.NotFound:
LOG.warning(_LW("No compute node record for %(host)s:%(node)s"),
{'host': self.host,
'node': utils.get_node_name(self.host)})
def _init_compute_node(self, context, resources):
"""Initialise the compute node if it does not already exist.
The nova scheduler will be inoperable if compute_node
is not defined. The compute_node will remain undefined if
we fail to create it or if there is no associated service
registered.
If this method has to create a compute node it needs initial
values - these come from resources.
:param context: security context
:param resources: initial values
"""
# try to get the compute node record from the
# database. If we get one we use resources to initialize
compute_node = self._get_compute_node(context)
if compute_node:
self._copy_resources(compute_node, resources)
compute_node.save()
return
# there was no local copy and none in the database
# so we need to create a new compute node. This needs
# to be initialised with resource values.
compute_node = objects.ComputeNode(context)
service = objects.Service.get_by_host_and_binary(
context, self.host, 'nova-compute')
compute_node.host = self.host
compute_node.service_id = service['id']
self._copy_resources(compute_node, resources)
compute_node.create()
LOG.info(_LI('Compute_service record created for '
'%(host)s:%(node)s'),
{'host': self.host, 'node': utils.get_node_name(self.host)})
def __init__(self, name):
self.name = name
# We currently just hold one aggregate subnode representing the
# resources owned by all the site's nodes.
self._aggragate_node = Node(utils.get_node_name(name))
self._instance_launch_information = {}
def _do_build_and_run_instance(self, context, host, instance, image,
request_spec, filter_properties,
admin_password, injected_files,
requested_networks, security_groups,
block_device_mapping, node=None,
limits=None):
try:
LOG.debug(_('Starting instance...'), context=context,
instance=instance)
instance.vm_state = vm_states.BUILDING
instance.task_state = None
instance.save(expected_task_state=(task_states.SCHEDULING, None))
except exception.InstanceNotFound:
msg = 'Instance disappeared before build.'
LOG.debug(msg, instance=instance)
return
except exception.UnexpectedTaskStateError as e:
LOG.debug(e.format_message(), instance=instance)
return
# b64 decode the files to inject:
decoded_files = self._decode_files(injected_files)
if limits is None:
limits = {}
if node is None:
node = t_utils.get_node_name(host)
LOG.debug('No node specified, defaulting to %s', node,
instance=instance)
try:
self._build_and_run_instance(
context, host, instance, image, request_spec, decoded_files,
admin_password, requested_networks, security_groups,
block_device_mapping, node, limits, filter_properties)
except exception.RescheduledException as e:
LOG.debug(e.format_message(), instance=instance)
retry = filter_properties.get('retry', None)
if not retry:
# no retry information, do not reschedule.
LOG.debug("Retry info not present, will not reschedule",
instance=instance)
self._cleanup_allocated_networks(context, instance,
requested_networks)
compute_utils.add_instance_fault_from_exc(
context, instance, e, sys.exc_info())
self._set_instance_obj_error_state(context, instance,
clean_task_state=True)
return
retry['exc'] = traceback.format_exception(*sys.exc_info())
self.network_api.cleanup_instance_network_on_host(
context, instance, self.host)
instance.task_state = task_states.SCHEDULING
instance.save()
self.compute_task_api.build_instances(
context, [instance], image, filter_properties, admin_password,
injected_files, requested_networks, security_groups,
block_device_mapping)
except (exception.InstanceNotFound,
exception.UnexpectedDeletingTaskStateError):
msg = 'Instance disappeared during build.'
LOG.debug(msg, instance=instance)
self._cleanup_allocated_networks(context, instance,
requested_networks)
except exception.BuildAbortException as e:
LOG.exception(e.format_message(), instance=instance)
self._cleanup_allocated_networks(context, instance,
requested_networks)
self._cleanup_volumes(context, instance.uuid,
block_device_mapping, raise_exc=False)
compute_utils.add_instance_fault_from_exc(
context, instance, e, sys.exc_info())
self._set_instance_obj_error_state(context, instance,
clean_task_state=True)
except Exception as e:
# should not reach here.
msg = _LE('Unexpected build failure, not rescheduling build.')
LOG.exception(msg, instance=instance)
self._cleanup_allocated_networks(context, instance,
requested_networks)
self._cleanup_volumes(context, instance.uuid,
block_device_mapping, raise_exc=False)
compute_utils.add_instance_fault_from_exc(context, instance,
e, sys.exc_info())
self._set_instance_obj_error_state(context, instance,
clean_task_state=True)
