def _update_subnet_host_routes(self, context, id, s):
def _combine(ht):
return ht['destination'] + "_" + ht['nexthop']
old_route_list = self._get_route_by_subnet(context, id)
new_route_set = set([_combine(route) for route in s['host_routes']])
old_route_set = set([_combine(route) for route in old_route_list])
for route_str in old_route_set - new_route_set:
for route in old_route_list:
if _combine(route) == route_str:
context.session.delete(route)
for route_str in new_route_set - old_route_set:
route = models_v2.SubnetRoute(
destination=route_str.partition("_")[0],
nexthop=route_str.partition("_")[2],
subnet_id=id)
context.session.add(route)
# Gather host routes for result
new_routes = []
for route_str in new_route_set:
new_routes.append({
'destination': route_str.partition("_")[0],
'nexthop': route_str.partition("_")[2]
})
del s["host_routes"]
return new_routes
def handle_port_metadata_access(plugin, context, port, is_delete=False):
if (cfg.CONF.NSX.metadata_mode == config.MetadataModes.INDIRECT
and port.get('device_owner') == const.DEVICE_OWNER_DHCP):
if port.get('fixed_ips', []) or is_delete:
fixed_ip = port['fixed_ips'][0]
query = context.session.query(models_v2.Subnet)
subnet = query.filter(
models_v2.Subnet.id == fixed_ip['subnet_id']).one()
# If subnet does not have a gateway do not create metadata
# route. This is done via the enable_isolated_metadata
# option if desired.
if not subnet.get('gateway_ip'):
LOG.info(
_('Subnet %s does not have a gateway, the metadata '
'route will not be created'), subnet['id'])
return
metadata_routes = [
r for r in subnet.routes
if r['destination'] == METADATA_DHCP_ROUTE
]
if metadata_routes:
# We should have only a single metadata route at any time
# because the route logic forbids two routes with the same
# destination. Update next hop with the provided IP address
if not is_delete:
metadata_routes[0].nexthop = fixed_ip['ip_address']
else:
context.session.delete(metadata_routes[0])
else:
# add the metadata route
route = models_v2.SubnetRoute(subnet_id=subnet.id,
destination=METADATA_DHCP_ROUTE,
nexthop=fixed_ip['ip_address'])
context.session.add(route)
def _save_subnet(self, context, network, subnet_args, dns_nameservers,
host_routes, allocation_pools):
allocation_pools = self._prepare_allocation_pools(
context, allocation_pools, subnet_args)
self._validate_subnet_cidr(context, network, subnet_args['cidr'])
self._validate_network_subnetpools(network,
subnet_args['subnetpool_id'],
subnet_args['ip_version'])
subnet = models_v2.Subnet(**subnet_args)
context.session.add(subnet)
if attributes.is_attr_set(dns_nameservers):
for addr in dns_nameservers:
ns = models_v2.DNSNameServer(address=addr, subnet_id=subnet.id)
context.session.add(ns)
if attributes.is_attr_set(host_routes):
for rt in host_routes:
route = models_v2.SubnetRoute(subnet_id=subnet.id,
destination=rt['destination'],
nexthop=rt['nexthop'])
context.session.add(route)
self._save_allocation_pools(context, subnet, allocation_pools)
return subnet
def _save_subnet(self, context,
network,
subnet_args,
dns_nameservers,
host_routes,
subnet_request):
self._validate_subnet_cidr(context, network, subnet_args['cidr'])
self._validate_network_subnetpools(network,
subnet_args['subnetpool_id'],
subnet_args['ip_version'])
subnet = models_v2.Subnet(**subnet_args)
context.session.add(subnet)
# NOTE(changzhi) Store DNS nameservers with order into DB one
# by one when create subnet with DNS nameservers
if attributes.is_attr_set(dns_nameservers):
for order, server in enumerate(dns_nameservers):
dns = models_v2.DNSNameServer(
address=server,
order=order,
subnet_id=subnet.id)
context.session.add(dns)
if attributes.is_attr_set(host_routes):
for rt in host_routes:
route = models_v2.SubnetRoute(
subnet_id=subnet.id,
destination=rt['destination'],
nexthop=rt['nexthop'])
context.session.add(route)
self.save_allocation_pools(context, subnet,
subnet_request.allocation_pools)
return subnet
def _ensure_metadata_host_route(self, context, fixed_ip_data,
is_delete=False):
subnet = self._get_subnet(context, fixed_ip_data['subnet_id'])
# If subnet does not have a gateway do not create metadata route. This
# is done via the enable_isolated_metadata option if desired.
if not subnet.get('gateway_ip'):
return
metadata_routes = [r for r in subnet.routes
if r['destination'] == METADATA_DHCP_ROUTE]
if metadata_routes:
# We should have only a single metadata route at any time
# because the route logic forbids two routes with the same
# destination. Update next hop with the provided IP address
if not is_delete:
metadata_routes[0].nexthop = fixed_ip_data['ip_address']
else:
context.session.delete(metadata_routes[0])
else:
# add the metadata route
route = models_v2.SubnetRoute(subnet_id=subnet.id,
destination=METADATA_DHCP_ROUTE,
nexthop=fixed_ip_data['ip_address'])
context.session.add(route)
return cfg.CONF.dhcp_agent_notification
def _save_subnet(self, context,
network,
subnet_args,
dns_nameservers,
host_routes,
subnet_request):
self._validate_subnet_cidr(context, network, subnet_args['cidr'])
self._validate_network_subnetpools(network,
subnet_args['subnetpool_id'],
subnet_args['ip_version'])
service_types = subnet_args.pop('service_types', [])
subnet = models_v2.Subnet(**subnet_args)
segment_id = subnet_args.get('segment_id')
try:
context.session.add(subnet)
context.session.flush()
except db_exc.DBReferenceError:
raise segment_exc.SegmentNotFound(segment_id=segment_id)
self._validate_segment(context, network['id'], segment_id)
# NOTE(changzhi) Store DNS nameservers with order into DB one
# by one when create subnet with DNS nameservers
if validators.is_attr_set(dns_nameservers):
for order, server in enumerate(dns_nameservers):
dns = subnet_obj.DNSNameServer(context,
address=server,
order=order,
subnet_id=subnet.id)
dns.create()
if validators.is_attr_set(host_routes):
for rt in host_routes:
route = models_v2.SubnetRoute(
subnet_id=subnet.id,
destination=rt['destination'],
nexthop=rt['nexthop'])
context.session.add(route)
if validators.is_attr_set(service_types):
for service_type in service_types:
service_type_entry = sst_model.SubnetServiceType(
subnet_id=subnet.id,
service_type=service_type)
context.session.add(service_type_entry)
self.save_allocation_pools(context, subnet,
subnet_request.allocation_pools)
return subnet
def handle_port_metadata_access(plugin, context, port, is_delete=False):
# For instances supporting DHCP option 121 and created in a
# DHCP-enabled but isolated network. This method is useful
# only when no network namespace support.
plugin_cfg = getattr(cfg.CONF, plugin.cfg_group)
if (plugin_cfg.metadata_mode == config.MetadataModes.INDIRECT and
port.get('device_owner') == const.DEVICE_OWNER_DHCP):
if not port.get('fixed_ips'):
# If port does not have an IP, the associated subnet is in
# deleting state.
LOG.info('Port %s has no IP due to subnet in deleting state',
port['id'])
return
fixed_ip = port['fixed_ips'][0]
query = context.session.query(models_v2.Subnet)
subnet = query.filter(
models_v2.Subnet.id == fixed_ip['subnet_id']).one()
# If subnet does not have a gateway, do not create metadata
# route. This is done via the enable_isolated_metadata
# option if desired.
if not subnet.get('gateway_ip'):
LOG.info('Subnet %s does not have a gateway, the '
'metadata route will not be created',
subnet['id'])
return
metadata_routes = [r for r in subnet.routes
if r['destination'] == METADATA_DHCP_ROUTE]
if metadata_routes:
# We should have only a single metadata route at any time
# because the route logic forbids two routes with the same
# destination. Update next hop with the provided IP address
if not is_delete:
metadata_routes[0].nexthop = fixed_ip['ip_address']
else:
context.session.delete(metadata_routes[0])
else:
# add the metadata route
route = models_v2.SubnetRoute(
subnet_id=subnet.id,
destination=METADATA_DHCP_ROUTE,
nexthop=fixed_ip['ip_address'])
context.session.add(route)
