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# vim: tabstop=4 shiftwidth=4 softtabstop=4
# Copyright 2013 OpenStack LLC.
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import netaddr
import netaddr.core as netexc
from webob import exc
from nova.api.openstack import extensions
from nova import context as nova_context
from nova import exception
import nova.network
from nova.openstack.common import cfg
from nova.openstack.common import log as logging
from nova import quota
CONF = cfg.CONF
try:
os_network_opts = [
cfg.BoolOpt("enable_network_quota",
default=False,
help="Enables or disables quotaing of tenant networks"),
cfg.StrOpt('use_quantum_default_nets',
default="False",
help=('Control for checking for default networks')),
cfg.StrOpt('quantum_default_tenant_id',
default="default",
help=('Default tenant id when creating quantum '
'networks'))
]
CONF.register_opts(os_network_opts)
except cfg.DuplicateOptError:
# NOTE(jkoelker) These options are verbatim elsewhere this is here
# to make sure they are registered for our use.
pass
if CONF.enable_network_quota:
opts = [
cfg.IntOpt('quota_networks',
default=3,
help='number of private networks allowed per project'),
]
CONF.register_opts(opts)
QUOTAS = quota.QUOTAS
LOG = logging.getLogger(__name__)
authorize = extensions.extension_authorizer('compute', 'os-networks')
def network_dict(network):
return {"id": network.get("uuid") or network["id"],
"cidr": network["cidr"],
"label": network["label"]}
class NetworkController(object):
def __init__(self, network_api=None):
self.network_api = nova.network.API()
self._default_networks = []
def _refresh_default_networks(self):
self._default_networks = []
if CONF.use_quantum_default_nets == "True":
try:
self._default_networks = self._get_default_networks()
except Exception:
LOG.exception("Failed to get default networks")
def _get_default_networks(self):
project_id = CONF.quantum_default_tenant_id
ctx = nova_context.RequestContext(user_id=None,
project_id=project_id)
networks = {}
for n in self.network_api.get_all(ctx):
networks[n['id']] = n['label']
return [{'id': k, 'label': v} for k, v in networks.iteritems()]
def index(self, req):
context = req.environ['nova.context']
authorize(context)
networks = self.network_api.get_all(context)
if not self._default_networks:
self._refresh_default_networks()
networks.extend(self._default_networks)
return {'networks': [network_dict(n) for n in networks]}
def show(self, req, id):
context = req.environ['nova.context']
authorize(context)
LOG.debug(_("Showing network with id %s") % id)
try:
network = self.network_api.get(context, id)
except exception.NetworkNotFound:
raise exc.HTTPNotFound(_("Network not found"))
return network_dict(network)
def delete(self, req, id):
context = req.environ['nova.context']
authorize(context)
try:
if CONF.enable_network_quota:
reservation = QUOTAS.reserve(context, networks=-1)
except Exception:
reservation = None
LOG.exception(_("Failed to update usages deallocating "
"network."))
LOG.info(_("Deleting network with id %s") % id)
try:
self.network_api.delete(context, id)
if CONF.enable_network_quota and reservation:
QUOTAS.commit(context, reservation)
response = exc.HTTPAccepted()
except exception.NetworkNotFound:
response = exc.HTTPNotFound(_("Network not found"))
return response
def create(self, req, body):
if not body:
raise exc.HTTPUnprocessableEntity()
context = req.environ["nova.context"]
authorize(context)
network = body["network"]
keys = ["cidr", "cidr_v6", "ipam", "vlan_start", "network_size",
"num_networks"]
kwargs = dict((k, network.get(k)) for k in keys)
label = network["label"]
if not (kwargs["cidr"] or kwargs["cidr_v6"]):
msg = _("No CIDR requested")
raise exc.HTTPBadRequest(explanation=msg)
if kwargs["cidr"]:
try:
net = netaddr.IPNetwork(kwargs["cidr"])
if net.size < 4:
msg = _("Requested network does not contain "
"enough (2+) usable hosts")
raise exc.HTTPBadRequest(explanation=msg)
except netexc.AddrFormatError:
msg = _("CIDR is malformed.")
raise exc.HTTPBadRequest(explanation=msg)
except netexc.AddrConversionError:
msg = _("Address could not be converted.")
raise exc.HTTPBadRequest(explanation=msg)
networks = []
try:
if CONF.enable_network_quota:
reservation = QUOTAS.reserve(context, networks=1)
except exception.OverQuota:
msg = _("Quota exceeded, too many networks.")
raise exc.HTTPBadRequest(explanation=msg)
try:
networks = self.network_api.create(context,
label=label, **kwargs)
if CONF.enable_network_quota:
QUOTAS.commit(context, reservation)
except Exception:
if CONF.enable_network_quota:
QUOTAS.rollback(context, reservation)
msg = _("Create networks failed")
LOG.exception(msg, extra=network)
raise exc.HTTPServiceUnavailable(explanation=msg)
return {"network": network_dict(networks[0])}
class Os_networks(extensions.ExtensionDescriptor):
"""Tenant-based Network Management Extension."""
name = "OSNetworks"
alias = "os-networks"
namespace = "http://docs.openstack.org/compute/ext/os-networks/api/v1.1"
updated = "2012-03-07T09:46:43-05:00"
def get_resources(self):
ext = extensions.ResourceExtension('os-networks',
NetworkController())
return [ext]
def _sync_networks(context, project_id, session):
ctx = nova_context.RequestContext(user_id=None, project_id=project_id)
ctx = ctx.elevated()
networks = nova.network.api.API().get_all(ctx)
return dict(networks=len(networks))
if CONF.enable_network_quota:
QUOTAS.register_resource(quota.ReservableResource('networks',
_sync_networks,
'quota_networks'))
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