def get_nsx_switch_and_port_id(session, cluster, neutron_port_id):
"""Return the NSX switch and port uuids for a given neutron port.
First, look up the Neutron database. If not found, execute
a query on NSX platform as the mapping might be missing because
the port was created before upgrading to grizzly.
This routine also retrieves the identifier of the logical switch in
the backend where the port is plugged. Prior to Icehouse this
information was not available in the Neutron Database. For dealing
with pre-existing records, this routine will query the backend
for retrieving the correct switch identifier.
As of Icehouse release it is not indeed anymore possible to assume
the backend logical switch identifier is equal to the neutron
network identifier.
"""
nvp_switch_id, nvp_port_id = nicira_db.get_nsx_switch_and_port_id(
session, neutron_port_id)
if not nvp_switch_id:
# Find logical switch for port from backend
# This is a rather expensive query, but it won't be executed
# more than once for each port in Neutron's lifetime
nvp_ports = nvplib.query_lswitch_lports(
cluster,
'*',
relations='LogicalSwitchConfig',
filters={
'tag': neutron_port_id,
'tag_scope': 'q_port_id'
})
# Only one result expected
# NOTE(salv-orlando): Not handling the case where more than one
# port is found with the same neutron port tag
if not nvp_ports:
LOG.warn(_("Unable to find NVP port for Neutron port %s"),
neutron_port_id)
# This method is supposed to return a tuple
return None, None
nvp_port = nvp_ports[0]
nvp_switch_id = (nvp_port['_relations']['LogicalSwitchConfig']['uuid'])
with session.begin(subtransactions=True):
if nvp_port_id:
# Mapping already exists. Delete before recreating
nicira_db.delete_neutron_nsx_port_mapping(
session, neutron_port_id)
else:
nvp_port_id = nvp_port['uuid']
# (re)Create DB mapping
nicira_db.add_neutron_nsx_port_mapping(session, neutron_port_id,
nvp_switch_id, nvp_port_id)
return nvp_switch_id, nvp_port_id
def get_nsx_switch_and_port_id(session, cluster, neutron_port_id):
"""Return the NSX switch and port uuids for a given neutron port.
First, look up the Neutron database. If not found, execute
a query on NSX platform as the mapping might be missing because
the port was created before upgrading to grizzly.
This routine also retrieves the identifier of the logical switch in
the backend where the port is plugged. Prior to Icehouse this
information was not available in the Neutron Database. For dealing
with pre-existing records, this routine will query the backend
for retrieving the correct switch identifier.
As of Icehouse release it is not indeed anymore possible to assume
the backend logical switch identifier is equal to the neutron
network identifier.
"""
nvp_switch_id, nvp_port_id = nicira_db.get_nsx_switch_and_port_id(
session, neutron_port_id)
if not nvp_switch_id:
# Find logical switch for port from backend
# This is a rather expensive query, but it won't be executed
# more than once for each port in Neutron's lifetime
nvp_ports = nvplib.query_lswitch_lports(
cluster, '*', relations='LogicalSwitchConfig',
filters={'tag': neutron_port_id,
'tag_scope': 'q_port_id'})
# Only one result expected
# NOTE(salv-orlando): Not handling the case where more than one
# port is found with the same neutron port tag
if not nvp_ports:
LOG.warn(_("Unable to find NVP port for Neutron port %s"),
neutron_port_id)
# This method is supposed to return a tuple
return None, None
nvp_port = nvp_ports[0]
nvp_switch_id = (nvp_port['_relations']
['LogicalSwitchConfig']['uuid'])
with session.begin(subtransactions=True):
if nvp_port_id:
# Mapping already exists. Delete before recreating
nicira_db.delete_neutron_nsx_port_mapping(
session, neutron_port_id)
else:
nvp_port_id = nvp_port['uuid']
# (re)Create DB mapping
nicira_db.add_neutron_nsx_port_mapping(
session, neutron_port_id,
nvp_switch_id, nvp_port_id)
return nvp_switch_id, nvp_port_id