class RequestGroup(base.NovaObject):
"""Versioned object based on the unversioned
nova.api.openstack.placement.lib.RequestGroup object.
"""
VERSION = '1.0'
fields = {
'use_same_provider': fields.BooleanField(default=True),
'resources': fields.DictOfIntegersField(default={}),
'required_traits': fields.SetOfStringsField(default=set()),
'forbidden_traits': fields.SetOfStringsField(default=set()),
# The aggregates field has a form of
# [[aggregate_UUID1],
# [aggregate_UUID2, aggregate_UUID3]]
# meaning that the request should be fulfilled from an RP that is a
# member of the aggregate aggregate_UUID1 and member of the aggregate
# aggregate_UUID2 or aggregate_UUID3 .
'aggregates': fields.ListOfListsOfStringsField(default=[]),
}
def __init__(self, context=None, **kwargs):
super(RequestGroup, self).__init__(context=context, **kwargs)
self.obj_set_defaults()
class RequestGroup(base.NovaObject):
"""Versioned object based on the unversioned
nova.api.openstack.placement.lib.RequestGroup object.
"""
# Version 1.0: Initial version
# Version 1.1: add requester_id and provider_uuids fields
VERSION = '1.1'
fields = {
'use_same_provider': fields.BooleanField(default=True),
'resources': fields.DictOfIntegersField(default={}),
'required_traits': fields.SetOfStringsField(default=set()),
'forbidden_traits': fields.SetOfStringsField(default=set()),
# The aggregates field has a form of
# [[aggregate_UUID1],
# [aggregate_UUID2, aggregate_UUID3]]
# meaning that the request should be fulfilled from an RP that is a
# member of the aggregate aggregate_UUID1 and member of the aggregate
# aggregate_UUID2 or aggregate_UUID3 .
'aggregates': fields.ListOfListsOfStringsField(default=[]),
# The entity the request is coming from (e.g. the Neutron port uuid)
# which may not always be a UUID.
'requester_id': fields.StringField(nullable=True, default=None),
# The resource provider UUIDs that together fulfill the request
# NOTE(gibi): this can be more than one if this is the unnumbered
# request group (i.e. use_same_provider=False)
'provider_uuids': fields.ListOfUUIDField(default=[]),
}
def __init__(self, context=None, **kwargs):
super(RequestGroup, self).__init__(context=context, **kwargs)
self.obj_set_defaults()
@classmethod
def from_port_request(cls, context, port_uuid, port_resource_request):
"""Init the group from the resource request of a neutron port
:param context: the request context
:param port_uuid: the port requesting the resources
:param port_resource_request: the resource_request attribute of the
neutron port
For example:
port_resource_request = {
"resources": {
"NET_BW_IGR_KILOBIT_PER_SEC": 1000,
"NET_BW_EGR_KILOBIT_PER_SEC": 1000},
"required": ["CUSTOM_PHYSNET_2",
"CUSTOM_VNIC_TYPE_NORMAL"]
}
"""
# NOTE(gibi): Assumptions:
# * a port requests resource from a single provider.
# * a port only specifies resources and required traits
# NOTE(gibi): Placement rejects allocation candidates where a request
# group has traits but no resources specified. This is why resources
# are handled as mandatory below but not traits.
obj = cls(context=context,
use_same_provider=True,
resources=port_resource_request['resources'],
required_traits=set(port_resource_request.get(
'required', [])),
requester_id=port_uuid)
obj.obj_set_defaults()
return obj
def obj_make_compatible(self, primitive, target_version):
super(RequestGroup, self).obj_make_compatible(
primitive, target_version)
target_version = versionutils.convert_version_to_tuple(target_version)
if target_version < (1, 1):
if 'requester_id' in primitive:
del primitive['requester_id']
if 'provider_uuids' in primitive:
del primitive['provider_uuids']