def build_request_spec(ctxt, image, instances, instance_type=None):
"""Build a request_spec for the scheduler.
The request_spec assumes that all instances to be scheduled are the same
type.
"""
instance = instances[0]
if instance_type is None:
if isinstance(instance, objects.Instance):
instance_type = instance.get_flavor()
else:
instance_type = flavors.extract_flavor(instance)
if isinstance(instance, objects.Instance):
instance = instance_obj.compat_instance(instance)
if isinstance(instance_type, objects.Flavor):
instance_type = obj_base.obj_to_primitive(instance_type)
request_spec = {
'image': image or {},
'instance_properties': instance,
'instance_type': instance_type,
'num_instances': len(instances)}
return jsonutils.to_primitive(request_spec)
def _update_usage_from_instance(self, context, resources, instance):
"""Update usage for a single instance."""
uuid = instance['uuid']
is_new_instance = uuid not in self.tracked_instances
is_deleted_instance = instance['vm_state'] == vm_states.DELETED
if is_new_instance:
self.tracked_instances[uuid] = instance_obj.compat_instance(
instance)
sign = 1
if is_deleted_instance:
self.tracked_instances.pop(uuid)
sign = -1
self.stats.update_stats_for_instance(instance)
if self.pci_tracker:
self.pci_tracker.update_pci_for_instance(context, instance)
# if it's a new or deleted instance:
if is_new_instance or is_deleted_instance:
# new instance, update compute node resource usage:
self._update_usage(context, resources, instance, sign=sign)
resources['current_workload'] = self.stats.calculate_workload()
if self.pci_tracker:
resources['pci_device_pools'] = self.pci_tracker.stats
else:
resources['pci_device_pools'] = []
def _get_usage_dict(self, object_or_dict, **updates):
"""Make a usage dict _update methods expect.
Accepts a dict or an Instance or Flavor object, and a set of updates.
Converts the object to a dict and applies the updates.
:param object_or_dict: instance or flavor as an object or just a dict
:param updates: key-value pairs to update the passed object.
Currently only considers 'numa_topology', all other
keys are ignored.
:returns: a dict with all the information from object_or_dict updated
with updates
"""
usage = {}
if isinstance(object_or_dict, objects.Instance):
usage = instance_obj.compat_instance(object_or_dict)
elif isinstance(object_or_dict, objects.Flavor):
usage = obj_base.obj_to_primitive(object_or_dict)
else:
usage.update(object_or_dict)
for key in ('numa_topology',):
if key in updates:
usage[key] = updates[key]
return usage
def build_request_spec(ctxt, image, instances, instance_type=None):
"""Build a request_spec for the scheduler.
The request_spec assumes that all instances to be scheduled are the same
type.
"""
instance = instances[0]
if instance_type is None:
if isinstance(instance, objects.Instance):
instance_type = instance.get_flavor()
else:
instance_type = flavors.extract_flavor(instance)
if isinstance(instance, objects.Instance):
instance = instance_obj.compat_instance(instance)
if isinstance(instance_type, objects.Flavor):
instance_type = obj_base.obj_to_primitive(instance_type)
request_spec = {
'image': image or {},
'instance_properties': instance,
'instance_type': instance_type,
'num_instances': len(instances)
}
return jsonutils.to_primitive(request_spec)
def _get_usage_dict(self, object_or_dict, **updates):
"""Make a usage dict _update methods expect.
Accepts a dict or an Instance or Flavor object, and a set of updates.
Converts the object to a dict and applies the updates.
:param object_or_dict: instance or flavor as an object or just a dict
:param updates: key-value pairs to update the passed object.
Currently only considers 'numa_topology', all other
keys are ignored.
:returns: a dict with all the information from object_or_dict updated
with updates
"""
usage = {}
if isinstance(object_or_dict, objects.Instance):
usage = instance_obj.compat_instance(object_or_dict)
elif isinstance(object_or_dict, objects.Flavor):
usage = obj_base.obj_to_primitive(object_or_dict)
else:
usage.update(object_or_dict)
for key in ('numa_topology',):
if key in updates:
usage[key] = updates[key]
return usage
def _update_usage_from_instance(self, context, instance):
"""Update usage for a single instance."""
uuid = instance['uuid']
is_new_instance = uuid not in self.tracked_instances
is_deleted_instance = instance['vm_state'] == vm_states.DELETED
if is_new_instance:
self.tracked_instances[uuid] = instance_obj.compat_instance(
instance)
sign = 1
if is_deleted_instance:
self.tracked_instances.pop(uuid)
sign = -1
self.stats.update_stats_for_instance(instance)
if self.pci_tracker:
self.pci_tracker.update_pci_for_instance(context, instance)
# if it's a new or deleted instance:
if is_new_instance or is_deleted_instance:
# new instance, update compute node resource usage:
self._update_usage(instance, sign=sign)
self.compute_node['current_workload'] = self.stats.calculate_workload()
if self.pci_tracker:
self.compute_node['pci_device_pools'] = self.pci_tracker.stats
else:
self.compute_node['pci_device_pools'] = []
def resize_claim(self,
context,
instance,
instance_type,
image_meta=None,
limits=None):
"""Indicate that resources are needed for a resize operation to this
compute host.
:param context: security context
:param instance: instance object to reserve resources for
:param instance_type: new instance_type being resized to
:param limits: Dict of oversubscription limits for memory, disk,
and CPUs
:returns: A Claim ticket representing the reserved resources. This
should be turned into finalize a resource claim or free
resources after the compute operation is finished.
"""
image_meta = image_meta or {}
if self.disabled:
# compute_driver doesn't support resource tracking, just
# generate the migration record and continue the resize:
migration = self._create_migration(context, instance,
instance_type)
return claims.NopClaim(migration=migration)
# get memory overhead required to build this instance:
overhead = self.driver.estimate_instance_overhead(instance_type)
LOG.debug(
"Memory overhead for %(flavor)d MB instance; %(overhead)d "
"MB", {
'flavor': instance_type['memory_mb'],
'overhead': overhead['memory_mb']
})
instance_ref = instance_obj.compat_instance(instance)
claim = claims.ResizeClaim(context,
instance_ref,
instance_type,
image_meta,
self,
self.compute_node,
overhead=overhead,
limits=limits)
migration = self._create_migration(context, instance_ref,
instance_type)
claim.migration = migration
# Mark the resources in-use for the resize landing on this
# compute host:
self._update_usage_from_migration(context, instance_ref, image_meta,
self.compute_node, migration)
elevated = context.elevated()
self._update(elevated, self.compute_node)
return claim
def resize_claim(self, context, instance, instance_type,
image_meta=None, limits=None):
"""Indicate that resources are needed for a resize operation to this
compute host.
:param context: security context
:param instance: instance object to reserve resources for
:param instance_type: new instance_type being resized to
:param limits: Dict of oversubscription limits for memory, disk,
and CPUs
:returns: A Claim ticket representing the reserved resources. This
should be turned into finalize a resource claim or free
resources after the compute operation is finished.
"""
image_meta = image_meta or {}
if self.disabled:
# compute_driver doesn't support resource tracking, just
# generate the migration record and continue the resize:
migration = self._create_migration(context, instance,
instance_type)
return claims.NopClaim(migration=migration)
# get memory overhead required to build this instance:
overhead = self.driver.estimate_instance_overhead(instance_type)
LOG.debug("Memory overhead for %(flavor)d MB instance; %(overhead)d "
"MB", {'flavor': instance_type['memory_mb'],
'overhead': overhead['memory_mb']})
instance_ref = instance_obj.compat_instance(instance)
claim = claims.ResizeClaim(context, instance_ref, instance_type,
image_meta, self, self.compute_node,
overhead=overhead, limits=limits)
migration = self._create_migration(context, instance_ref,
instance_type)
claim.migration = migration
# Mark the resources in-use for the resize landing on this
# compute host:
self._update_usage_from_migration(context, instance_ref, image_meta,
self.compute_node, migration)
elevated = context.elevated()
self._update(elevated, self.compute_node)
return claim
