def get_network(self, context, id, fields=None):
"""
Retrieves all attributes of the network, NOT including
the ports of that network.
:returns: a sequence of mappings with the following signature:
{'id': UUID representing the network.
'name': Human-readable name identifying the network.
'tenant_id': Owner of network. only admin user
can specify a tenant_id other than its own.
'admin_state_up': Sets admin state of network. if down,
network does not forward packets.
'status': Indicates whether network is currently
operational (limit values to "ACTIVE", "DOWN",
"BUILD", and "ERROR"?
'subnets': Subnets associated with this network. Plan
to allow fully specified subnets as part of
network create.
}
:raises: exception.NetworkNotFound
:raises: exception.QuantumException
"""
# goto to the plugin DB and fecth the network
network = self._get_network(context, id)
# verify the fabric status of the corresponding
# logical switch(es) in nvp
try:
# FIXME(salvatore-orlando): This is not going to work unless
# nova_id is stored in db once multiple clusters are enabled
cluster = self._find_target_cluster(network)
lswitches = nvplib.get_lswitches(cluster, id)
net_op_status = constants.NET_STATUS_ACTIVE
quantum_status = network.status
for lswitch in lswitches:
lswitch_status = lswitch.get('LogicalSwitchStatus', None)
# FIXME(salvatore-orlando): Being unable to fetch the
# logical switch status should be an exception.
if (lswitch_status and
not lswitch_status.get('fabric_status', None)):
net_op_status = constants.NET_STATUS_DOWN
break
LOG.debug(_("Current network status:%(net_op_status)s; "
"Status in Quantum DB:%(quantum_status)s")
% locals())
if net_op_status != network.status:
# update the network status
with context.session.begin(subtransactions=True):
network.status = net_op_status
except Exception:
err_msg = _("Unable to get lswitches")
LOG.exception(err_msg)
raise nvp_exc.NvpPluginException(err_msg=err_msg)
# Don't do field selection here otherwise we won't be able
# to add provider networks fields
net_result = self._make_network_dict(network, None)
self._extend_network_dict_provider(context, net_result)
return self._fields(net_result, fields)
def _handle_lswitch_selection(self, cluster, network,
network_binding, max_ports,
allow_extra_lswitches):
lswitches = nvplib.get_lswitches(cluster, network.id)
try:
# TODO find main_ls too!
return [ls for ls in lswitches
if (ls['_relations']['LogicalSwitchStatus']
['lport_count'] < max_ports)].pop(0)
except IndexError:
# Too bad, no switch available
LOG.debug(_("No switch has available ports (%d checked)") %
len(lswitches))
if allow_extra_lswitches:
main_ls = [ls for ls in lswitches if ls['uuid'] == network.id]
tag_dict = dict((x['scope'], x['tag']) for x in main_ls[0]['tags'])
if not 'multi_lswitch' in tag_dict:
nvplib.update_lswitch(cluster,
main_ls[0]['uuid'],
main_ls[0]['display_name'],
network['tenant_id'],
tags=[{'tag': 'True',
'scope': 'multi_lswitch'}])
selected_lswitch = nvplib.create_lswitch(
cluster, network.tenant_id,
"%s-ext-%s" % (network.name, len(lswitches)),
network_binding.binding_type,
network_binding.tz_uuid,
network_binding.vlan_id,
network.id)
return selected_lswitch
else:
LOG.error(_("Maximum number of logical ports reached for "
"logical network %s") % network.id)
raise nvp_exc.NvpNoMorePortsException(network=network.id)
def _get_lswitch_cluster_pairs(self, netw_id, tenant_id):
"""Figure out the set of lswitches on each cluster that maps to this
network id"""
pairs = []
for c in self.clusters.itervalues():
lswitches = []
try:
results = nvplib.get_lswitches(c, netw_id)
lswitches.extend([ls['uuid'] for ls in results])
except q_exc.NetworkNotFound:
continue
pairs.append((c, lswitches))
if len(pairs) == 0:
raise q_exc.NetworkNotFound(net_id=netw_id)
LOG.debug(_("Returning pairs for network: %s"), pairs)
return pairs
