def port_chain_update(self, port_chain_id, port_chain):
try:
pc = self.client.update_port_chain(port_chain_id,
{'port_chain': port_chain})
except nc_exceptions.BadRequest as e:
LOG.warning('update port chain returns %s', e)
raise ValueError(str(e))
if pc and len(pc):
return pc['port_chain']['id']
else:
raise nfvo.UpdateChainException(message="Failed to update "
"port-chain")
def heal_chain(self,
chain_id,
vnf,
new_cp_list,
symmetrical=None,
auth_attr=None):
if not auth_attr:
LOG.warning("auth information required for n-sfc driver")
return None
neutronclient_ = NeutronClient(auth_attr)
port_pairs_list = neutronclient_.port_pair_list()
port_pair_groups_list = neutronclient_.port_pair_group_list()
port_chains_list = neutronclient_.port_chain_list()
pc_info = neutronclient_.port_chain_show(chain_id)
old_ppgs = pc_info['port_chain']['port_pair_groups']
old_ppgs_dict = {neutronclient_.port_pair_group_show(ppg_id)
['port_pair_group']['name'].split('-')[0]: \
ppg_id for ppg_id in old_ppgs}
# Find old_ppg_id
if vnf['name'] in old_ppgs_dict:
old_ppg_id = old_ppgs_dict[vnf['name']]
# Find old_pp
for port_pair in port_pairs_list['port_pairs']:
if vnf['name'] == port_pair['name'].split('-')[0]:
old_port_pair_id = port_pair['id']
# Create new port-pair
num_cps = len(new_cp_list)
if num_cps not in [1, 2]:
LOG.warning(
"Failed due to wrong number "
"of connection points: expected [1 | 2],"
"got %(cps)d", {'cps': num_cps})
raise nfvo.UpdateChainException(
message="Invalid number of connection points")
if num_cps == 1:
ingress = new_cp_list[0]
egress = new_cp_list[0]
else:
ingress = new_cp_list[0]
egress = new_cp_list[1]
port_pair = {}
port_pair['name'] = vnf['name'] + '-respawned-connection-points'
port_pair['description'] = 'port pair for ' + vnf['name']
port_pair['ingress'] = ingress
port_pair['egress'] = egress
port_pair_id = neutronclient_.port_pair_create(port_pair)
LOG.info('log: port_pair_id : %s', port_pair)
LOG.info('log: port_pair_id : %s', port_pair_id)
# Append new port-pair to port-pair-group
updated_ppg = {}
updated_ppg['name'] = vnf['name'] + '-port-pair-group'
updated_ppg[
'description'] = 'respawned port pair group for ' + vnf['name']
updated_ppg['port_pairs'] = []
updated_ppg['port_pairs'].append(port_pair_id)
ppg = neutronclient_.port_pair_group_update(ppg_id=old_ppg_id,
ppg_dict=updated_ppg)
# Delete old_port_pair
neutronclient_.port_pair_delete(old_port_pair_id)
return ppg
def update_chain(self,
chain_id,
fc_ids,
vnfs,
symmetrical=None,
auth_attr=None):
# (s3wong): chain can be updated either for
# the list of fc and/or list of port-pair-group
# since n-sfc driver does NOT track the ppg id
# it will look it up (or reconstruct) from
# networking-sfc DB --- but the caveat is that
# the VNF name MUST be unique
# TODO(mardim) Currently we figure out which VNF belongs to what
# port-pair-group or port-pair through the name of VNF.
# This is not the best approach. The best approach for the future
# propably is to maintain in the database the ID of the
# port-pair-group and port-pair that VNF belongs to so we can
# implemement the update in a more robust way.
if not auth_attr:
LOG.warning("auth information required for n-sfc driver")
return None
neutronclient_ = NeutronClient(auth_attr)
new_ppgs = []
updated_port_chain = dict()
pc_info = neutronclient_.port_chain_show(chain_id)
old_ppgs = pc_info['port_chain']['port_pair_groups']
old_ppgs_dict = {
neutronclient_.port_pair_group_show(ppg_id)['port_pair_group']
['name'].split('-')[0]: ppg_id
for ppg_id in old_ppgs
}
past_ppgs_dict = old_ppgs_dict.copy()
try:
for vnf in vnfs:
port_pair_group = {}
port_pair = {}
if vnf['name'] in old_ppgs_dict:
old_ppg_id = old_ppgs_dict.pop(vnf['name'])
new_ppgs.append(old_ppg_id)
else:
port_pair_group['name'] = vnf['name'] + '-port-pair-group'
port_pair_group['description'] = \
'port pair group for %s' % vnf['name']
port_pair_group['port_pairs'] = []
if CONNECTION_POINT not in vnf:
LOG.warning(
"Chain update failed due to missing "
"connection point info in VNF "
"%(vnfname)s", {'vnfname': vnf['name']})
raise nfvo.UpdateChainException(
message="Connection point not found")
cp_list = vnf[CONNECTION_POINT]
num_cps = len(cp_list)
if num_cps != 1 and num_cps != 2:
LOG.warning(
"Chain update failed due to wrong number "
"of connection points: expected [1 | 2],"
"got %(cps)d", {'cps': num_cps})
raise nfvo.UpdateChainException(
message="Invalid number of connection points")
port_pair['name'] = vnf['name'] + '-connection-points'
port_pair['description'] = 'port pair for %s' % vnf['name']
if num_cps == 1:
port_pair['ingress'] = cp_list[0]
port_pair['egress'] = cp_list[0]
else:
port_pair['ingress'] = cp_list[0]
port_pair['egress'] = cp_list[1]
port_pair_id = neutronclient_.port_pair_create(port_pair)
if not port_pair_id:
LOG.warning(
"Chain update failed due to port pair "
"creation failed for "
"vnf %(vnf)s", {'vnf': vnf['name']})
raise nfvo.UpdateChainException(
message="Failed to create port-pair")
port_pair_group['port_pairs'].append(port_pair_id)
port_pair_group_id = \
neutronclient_.port_pair_group_create(port_pair_group)
if not port_pair_group_id:
LOG.warning(
"Chain update failed due to port pair "
"group creation failed for vnf "
"%(vnf)s", {'vnf': vnf['name']})
for pp_id in port_pair_group['port_pairs']:
neutronclient_.port_pair_delete(pp_id)
raise nfvo.UpdateChainException(
message="Failed to create port-pair-group")
new_ppgs.append(port_pair_group_id)
except nfvo.UpdateChainException as e:
self._delete_ppgs_and_pps(neutronclient_, new_ppgs, past_ppgs_dict)
raise e
updated_port_chain['port_pair_groups'] = new_ppgs
try:
pc_id = neutronclient_.port_chain_update(chain_id,
updated_port_chain)
except (nc_exceptions.BadRequest, nfvo.UpdateChainException) as e:
self._delete_ppgs_and_pps(neutronclient_, new_ppgs, past_ppgs_dict)
raise e
for ppg_name in old_ppgs_dict:
ppg_info = neutronclient_. \
port_pair_group_show(old_ppgs_dict[ppg_name])
neutronclient_.port_pair_group_delete(old_ppgs_dict[ppg_name])
port_pairs = ppg_info['port_pair_group']['port_pairs']
if port_pairs and len(port_pairs):
for j in xrange(0, len(port_pairs)):
pp_id = port_pairs[j]
neutronclient_.port_pair_delete(pp_id)
return pc_id
def scale_chain(self, chain_id, vnf, symmetrical=None, auth_attr=None):
# chain_id = asdf1234
# vnf = {“name” : VNF1_name, “CONNECTION_POINT” : CP,}
if not auth_attr:
LOG.warning("auth information required for n-sfc driver")
return None
neutronclient_ = NeutronClient(auth_attr)
port_pairs_list = neutronclient_.port_pair_list()
port_pair_groups_list = neutronclient_.port_pair_group_list()
port_chains_list = neutronclient_.port_chain_list()
new_ppgs = []
updated_port_chain = dict()
pc_info = neutronclient_.port_chain_show(chain_id)
# Get port_chain_info from chain_id
old_ppgs = pc_info['port_chain']['port_pair_groups']
# old_ppgs = ["ppg_id1", "ppg_id2"]
old_ppgs_dict = {neutronclient_.port_pair_group_show(ppg_id)
['port_pair_group']['name'].split('-')[0]: \
ppg_id for ppg_id in old_ppgs}
# old_ppgs_dict = {VNF1 : ppg_id1, VNF2 : ppg_id2}
try:
if vnf['name'] in old_ppgs_dict:
updating_ppg_id = old_ppgs_dict[vnf['name']]
# updating_ppg_id = "ppg_id"
updating_ppg_dict = neutronclient_.port_pair_group_show(
updating_ppg_id)
#TODO: CONNECTION_POINT = manual typing
cp_list = vnf[CONNECTION_POINT]
num_cps = len(cp_list)
if num_cps not in [1, 2]:
LOG.warning(
"Chain update failed due to wrong number "
"of connection points: expected [1 | 2],"
"got %(cps)d", {'cps': num_cps})
raise nfvo.UpdateChainException(
message="Invalid number of connection points")
if num_cps == 1:
ingress = cp_list[0]
egress = cp_list[0]
else:
ingress = cp_list[0]
egress = cp_list[1]
port_pair = {}
port_pair[
'name'] = vnf['name'] + '-connection-points-scaled-out'
port_pair[
'description'] = 'scaled-out port pair for' + vnf['name']
port_pair['ingress'] = ingress
port_pair['egress'] = egress
port_pair_id = neutronclient_.port_pair_create(port_pair)
updating_ppg_dict['port_pairs'].append(port_pair_id)
updated_ppg = neutronclient_.port_pair_group_update(
ppg_id=updating_ppg_id, ppg_dict=updating_ppg_dict)
# call port_pair_group_update method
return updated_ppg
else:
raise nfvo.UpdateChainException(
message="The VNF is not included in the chain")
except nfvo.UpdateChainException as e:
raise e
