def setUp(self):
super(IPV6ModeEnumFieldTest, self).setUp()
self.field = common_types.IPV6ModeEnumField()
self.coerce_good_values = [(mode, mode) for mode in const.IPV6_MODES]
self.coerce_bad_values = ['6', 4, 'type', 'slaacc']
self.to_primitive_values = self.coerce_good_values
self.from_primitive_values = self.coerce_good_values
class Subnet(base.NeutronDbObject):
# Version 1.0: Initial version
# Version 1.1: Add dns_publish_fixed_ip field
VERSION = '1.1'
db_model = models_v2.Subnet
new_facade = True
fields = {
'id':
common_types.UUIDField(),
'project_id':
obj_fields.StringField(nullable=True),
'name':
obj_fields.StringField(nullable=True),
'network_id':
common_types.UUIDField(),
'segment_id':
common_types.UUIDField(nullable=True),
# NOTE: subnetpool_id can be 'prefix_delegation' string
# when the IPv6 Prefix Delegation is enabled
'subnetpool_id':
obj_fields.StringField(nullable=True),
'ip_version':
common_types.IPVersionEnumField(),
'cidr':
common_types.IPNetworkField(),
'gateway_ip':
obj_fields.IPAddressField(nullable=True),
'allocation_pools':
obj_fields.ListOfObjectsField('IPAllocationPool', nullable=True),
'enable_dhcp':
obj_fields.BooleanField(nullable=True),
'shared':
obj_fields.BooleanField(nullable=True),
'dns_nameservers':
obj_fields.ListOfObjectsField('DNSNameServer', nullable=True),
'dns_publish_fixed_ip':
obj_fields.BooleanField(nullable=True),
'host_routes':
obj_fields.ListOfObjectsField('Route', nullable=True),
'ipv6_ra_mode':
common_types.IPV6ModeEnumField(nullable=True),
'ipv6_address_mode':
common_types.IPV6ModeEnumField(nullable=True),
'service_types':
obj_fields.ListOfStringsField(nullable=True)
}
synthetic_fields = [
'allocation_pools', 'dns_nameservers', 'dns_publish_fixed_ip',
'host_routes', 'service_types', 'shared'
]
foreign_keys = {'Network': {'network_id': 'id'}}
fields_no_update = ['project_id', 'network_id']
fields_need_translation = {'host_routes': 'routes'}
def __init__(self, context=None, **kwargs):
super(Subnet, self).__init__(context, **kwargs)
self.add_extra_filter_name('shared')
def obj_load_attr(self, attrname):
if attrname == 'dns_publish_fixed_ip':
return self._load_dns_publish_fixed_ip()
if attrname == 'shared':
return self._load_shared()
if attrname == 'service_types':
return self._load_service_types()
super(Subnet, self).obj_load_attr(attrname)
def _load_dns_publish_fixed_ip(self, db_obj=None):
if db_obj:
object_data = db_obj.get('dns_publish_fixed_ip', None)
else:
object_data = SubnetDNSPublishFixedIP.get_objects(
self.obj_context, subnet_id=self.id)
dns_publish_fixed_ip = False
if object_data:
dns_publish_fixed_ip = object_data.get('dns_publish_fixed_ip')
setattr(self, 'dns_publish_fixed_ip', dns_publish_fixed_ip)
self.obj_reset_changes(['dns_publish_fixed_ip'])
def _load_shared(self, db_obj=None):
if db_obj:
# NOTE(korzen) db_obj is passed when Subnet object is loaded
# from DB
rbac_entries = db_obj.get('rbac_entries') or {}
shared = (rbac_db.RbacNeutronDbObjectMixin.is_network_shared(
self.obj_context, rbac_entries))
else:
# NOTE(korzen) this case is used when Subnet object was
# instantiated and without DB interaction (get_object(s), update,
# create), it should be rare case to load 'shared' by that method
shared = (rbac_db.RbacNeutronDbObjectMixin.get_shared_with_tenant(
self.obj_context.elevated(), network.NetworkRBAC,
self.network_id, self.project_id))
setattr(self, 'shared', shared)
self.obj_reset_changes(['shared'])
def _load_service_types(self, db_obj=None):
if db_obj:
service_types = db_obj.get('service_types', [])
else:
service_types = SubnetServiceType.get_objects(self.obj_context,
subnet_id=self.id)
self.service_types = [
service_type['service_type'] for service_type in service_types
]
self.obj_reset_changes(['service_types'])
def from_db_object(self, db_obj):
super(Subnet, self).from_db_object(db_obj)
self._load_dns_publish_fixed_ip(db_obj)
self._load_shared(db_obj)
self._load_service_types(db_obj)
@classmethod
def modify_fields_from_db(cls, db_obj):
# TODO(korzen) remove this method when IP and CIDR decorator ready
result = super(Subnet, cls).modify_fields_from_db(db_obj)
if 'cidr' in result:
result['cidr'] = net_utils.AuthenticIPNetwork(result['cidr'])
if 'gateway_ip' in result and result['gateway_ip'] is not None:
result['gateway_ip'] = netaddr.IPAddress(result['gateway_ip'])
return result
@classmethod
def modify_fields_to_db(cls, fields):
# TODO(korzen) remove this method when IP and CIDR decorator ready
result = super(Subnet, cls).modify_fields_to_db(fields)
if 'cidr' in result:
result['cidr'] = cls.filter_to_str(result['cidr'])
if 'gateway_ip' in result and result['gateway_ip'] is not None:
result['gateway_ip'] = cls.filter_to_str(result['gateway_ip'])
return result
@classmethod
def find_candidate_subnets(cls, context, network_id, host, service_type,
fixed_configured, fixed_ips):
"""Find canditate subnets for the network, host, and service_type"""
query = cls.query_subnets_on_network(context, network_id)
query = SubnetServiceType.query_filter_service_subnets(
query, service_type)
# Select candidate subnets and return them
if not cls.is_host_set(host):
if fixed_configured:
# If fixed_ips in request and host is not known all subnets on
# the network are candidates. Host/Segment will be validated
# on port update with binding:host_id set. Allocation _cannot_
# be deferred as requested fixed_ips would then be lost.
return cls._query_filter_by_fixed_ips_segment(
query, fixed_ips).all()
# If the host isn't known, we can't allocate on a routed network.
# So, exclude any subnets attached to segments.
return cls._query_exclude_subnets_on_segments(query).all()
# The host is known. Consider both routed and non-routed networks
results = cls._query_filter_by_segment_host_mapping(query, host).all()
# For now, we're using a simplifying assumption that a host will only
# touch one segment in a given routed network. Raise exception
# otherwise. This restriction may be relaxed as use cases for multiple
# mappings are understood.
segment_ids = {
subnet.segment_id
for subnet, mapping in results if mapping
}
if 1 < len(segment_ids):
raise segment_exc.HostConnectedToMultipleSegments(
host=host, network_id=network_id)
return [subnet for subnet, _mapping in results]
@classmethod
def _query_filter_by_fixed_ips_segment(cls, query, fixed_ips):
"""Excludes subnets not on the same segment as fixed_ips
:raises: FixedIpsSubnetsNotOnSameSegment
"""
segment_ids = []
for fixed_ip in fixed_ips:
subnet = None
if 'subnet_id' in fixed_ip:
try:
subnet = query.filter(
cls.db_model.id == fixed_ip['subnet_id']).all()[0]
except IndexError:
# NOTE(hjensas): The subnet is invalid for the network,
# return all subnets. This will be detected in following
# IPAM code and some exception will be raised.
return query
elif 'ip_address' in fixed_ip:
ip = netaddr.IPNetwork(fixed_ip['ip_address'])
for s in query.all():
if ip in netaddr.IPNetwork(s.cidr):
subnet = s
break
if not subnet:
# NOTE(hjensas): The ip address is invalid, return all
# subnets. This will be detected in following IPAM code
# and some exception will be raised.
return query
if subnet and subnet.segment_id not in segment_ids:
segment_ids.append(subnet.segment_id)
if 1 < len(segment_ids):
raise segment_exc.FixedIpsSubnetsNotOnSameSegment()
segment_id = None if not segment_ids else segment_ids[0]
return query.filter(cls.db_model.segment_id == segment_id)
@classmethod
def _query_filter_by_segment_host_mapping(cls, query, host):
# TODO(tuanvu): find OVO-like solution for handling "join queries" and
# write unit test for this function
"""Excludes subnets on segments not reachable by the host
The query gets two kinds of subnets: those that are on segments that
the host can reach and those that are not on segments at all (assumed
reachable by all hosts). Hence, subnets on segments that the host
*cannot* reach are excluded.
"""
SegmentHostMapping = segment_model.SegmentHostMapping
# A host has been provided. Consider these two scenarios
# 1. Not a routed network: subnets are not on segments
# 2. Is a routed network: only subnets on segments mapped to host
# The following join query returns results for either. The two are
# guaranteed to be mutually exclusive when subnets are created.
query = query.add_entity(SegmentHostMapping)
query = query.outerjoin(
SegmentHostMapping,
and_(cls.db_model.segment_id == SegmentHostMapping.segment_id,
SegmentHostMapping.host == host))
# Essentially "segment_id IS NULL XNOR host IS NULL"
query = query.filter(
or_(
and_(cls.db_model.segment_id.isnot(None),
SegmentHostMapping.host.isnot(None)),
and_(cls.db_model.segment_id.is_(None),
SegmentHostMapping.host.is_(None))))
return query
@classmethod
def query_subnets_on_network(cls, context, network_id):
query = model_query.get_collection_query(context, cls.db_model)
return query.filter(cls.db_model.network_id == network_id)
@classmethod
def _query_exclude_subnets_on_segments(cls, query):
"""Excludes all subnets associated with segments
For the case where the host is not known, we don't consider any subnets
that are on segments. But, we still consider subnets that are not
associated with any segment (i.e. for non-routed networks).
"""
return query.filter(cls.db_model.segment_id.is_(None))
@classmethod
def is_host_set(cls, host):
"""Utility to tell if the host is set in the port binding"""
# This seems redundant, but its not. Host is unset if its None, '',
# or ATTR_NOT_SPECIFIED due to differences in host binding
# implementations.
return host and validators.is_attr_set(host)
@classmethod
def network_has_no_subnet(cls, context, network_id, host, service_type):
# Determine why we found no subnets to raise the right error
query = cls.query_subnets_on_network(context, network_id)
if cls.is_host_set(host):
# Empty because host isn't mapped to a segment with a subnet?
s_query = query.filter(cls.db_model.segment_id.isnot(None))
if s_query.limit(1).count() != 0:
# It is a routed network but no subnets found for host
raise segment_exc.HostNotConnectedToAnySegment(
host=host, network_id=network_id)
if not query.limit(1).count():
# Network has *no* subnets of any kind. This isn't an error.
return True
# Does filtering ineligible service subnets makes the list empty?
query = SubnetServiceType.query_filter_service_subnets(
query, service_type)
if query.limit(1).count():
# No, must be a deferred IP port because there are matching
# subnets. Happens on routed networks when host isn't known.
raise ipam_exceptions.DeferIpam()
return False
def obj_make_compatible(self, primitive, target_version):
_target_version = versionutils.convert_version_to_tuple(target_version)
if _target_version < (1, 1): # version 1.1 adds "dns_publish_fixed_ip"
primitive.pop('dns_publish_fixed_ip', None)