import asyncio
import logging
+import itertools
from pathlib import Path
import yaml
data = yaml.safe_load_all(pil_fd)
return next(data)
+ def _create_vnf_id_maps(self, nsd):
+ """
+ map identifier for 'member-vnf-index' in nsd to syntax that is safe for mzn
+
+ return tuples with mappings {<adjusted id>: <original id>} and {<original id>: <adjusted id>}
+ """
+ next_idx = itertools.count()
+ member_vnf_index2mzn = {e['member-vnf-index']: 'VNF' + str(next(next_idx)) for e in
+ nsd['constituent-vnfd']}
+
+ # reverse the name map dictionary, used when the placement result is remapped
+ mzn_name2member_vnf_index = {v: k for k, v in member_vnf_index2mzn.items()}
+
+ return member_vnf_index2mzn, mzn_name2member_vnf_index
+
async def get_placement(self, nslcmop_id):
"""
- Collects and prepares placement information.
try:
nslcmop = self._get_nslcmop(nslcmop_id)
nsd = self._get_nsd(nslcmop['operationParams']['nsdId'])
- self.log.info("nsd: {}".format(nsd))
+ member_vnf_index2mzn, mzn2member_vnf_index = self._create_vnf_id_maps(nsd)
+ # adjust vnf identifiers
+ for e in nsd['constituent-vnfd']:
+ e['member-vnf-index'] = member_vnf_index2mzn[e['member-vnf-index']]
+ for vld in nsd['vld']:
+ for cp_ref in vld['vnfd-connection-point-ref']:
+ cp_ref['member-vnf-index-ref'] = member_vnf_index2mzn[cp_ref['member-vnf-index-ref']]
+ self.log.info("adjusted nsd: {}".format(nsd))
projects = self._get_projects()
self.log.info("projects: {}".format(projects))
nslcmop_project = nslcmop['_admin']['projects_read'][0]
vims_information = {_['name']: _['_id'] for _ in vim_accounts_data}
price_list = self._get_vnf_price_list(Server.vnf_price_list_file, projects[nslcmop_project])
pil_info = self._get_pil_info(Server.pil_price_list_file)
- pinning = nslcmop['operationParams'].get('vnf')
- self.log.info("pinning: {}".format(pinning))
+ pinnings = nslcmop['operationParams'].get('vnf')
+ # remap member-vnf-index values according to id map
+ for pinning in pinnings:
+ pinning['member-vnf-index'] = member_vnf_index2mzn[pinning['member-vnf-index']]
+ self.log.info("pinnings: {}".format(pinnings))
order_constraints = nslcmop['operationParams'].get('placement-constraints')
self.log.info("order constraints: {}".format(order_constraints))
price_list,
nsd,
pil_info,
- pinning, order_constraints).create_ns_placement_data()
+ pinnings, order_constraints).create_ns_placement_data()
vnf_placement = MznPlacementConductor(self.log).do_placement_computation(nspd)
self.log.exception("PLA fault. Exception: {}".format(e))
vnf_placement = []
finally:
+ # remap names in vnf_placement
+ for e in vnf_placement:
+ e['member-vnf-index'] = mzn2member_vnf_index[e['member-vnf-index']]
await self.msgBus.aiowrite("pla", "placement",
{'placement': {'vnf': vnf_placement, 'nslcmopId': nslcmop_id}})