2 # -*- coding: utf-8 -*-
4 # Copyright 2020 ArctosLabs Scandinavia AB
6 # Licensed under the Apache License, Version 2.0 (the "License");
7 # you may not use this file except in compliance with the License.
8 # You may obtain a copy of the License at
10 # http://www.apache.org/licenses/LICENSE-2.0
12 # Unless required by applicable law or agreed to in writing, software
13 # distributed under the License is distributed on an "AS IS" BASIS,
14 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
16 # See the License for the specific language governing permissions and
17 # limitations under the License.
22 from pathlib
import Path
25 from osm_common
import dbmemory
, dbmongo
, msglocal
, msgkafka
27 from osm_pla
.config
.config
import Config
28 from osm_pla
.placement
.mznplacement
import MznPlacementConductor
29 from osm_pla
.placement
.mznplacement
import NsPlacementDataFactory
33 pil_price_list_file
= Path("/placement/pil_price_list.yaml")
34 vnf_price_list_file
= Path("/placement/vnf_price_list.yaml")
36 def __init__(self
, config
: Config
):
37 self
.log
= logging
.getLogger("pla.server")
43 if config
.get("database", "driver") == "mongo":
44 self
.db
= dbmongo
.DbMongo()
45 self
.db
.db_connect(config
.get("database"))
46 elif config
.get("database", "driver") == "memory":
47 self
.db
= dbmemory
.DbMemory()
48 self
.db
.db_connect(config
.get("database"))
51 "Invalid configuration param '{}' at '[database]':'driver'".format(
52 config
.get("database", "driver")
56 if config
.get("message", "driver") == "local":
57 self
.msgBus
= msglocal
.MsgLocal()
58 elif config
.get("message", "driver") == "kafka":
59 self
.msgBus
= msgkafka
.MsgKafka()
62 "Invalid message bus driver {}".format(
63 config
.get("message", "driver")
66 self
.msgBus
.connect(config
.get("message"))
68 except Exception as e
:
69 self
.log
.exception("kafka setup error. Exception: {}".format(e
))
71 def _get_nslcmop(self
, nsdlcmop_id
):
74 :return: nslcmop from database corresponding to nslcmop_id
76 db_filter
= {"_id": nsdlcmop_id
}
77 nslcmop
= self
.db
.get_one("nslcmops", db_filter
)
80 def _get_projects(self
):
82 :return: project name to project id mapping
84 projects
= self
.db
.get_list("projects")
85 return {project
["_id"]: project
["name"] for project
in projects
}
87 def _get_nsd(self
, nsd_id
):
90 :return: nsd from database corresponding to nsd_id
92 db_filter
= {"_id": nsd_id
}
93 return self
.db
.get_one("nsds", db_filter
)
95 def _get_vim_accounts(self
, vim_account_ids
):
97 :param vim_account_ids: list of VIM account ids
98 :return: list of vim account entries from database corresponding to list in vim_accounts_id
100 db_filter
= {"_id": vim_account_ids
}
101 return self
.db
.get_list("vim_accounts", db_filter
)
103 def _read_vnf_price_list(self
, price_list_file_path
):
105 read vnf price list configuration file
106 :param price_list_file_path:
109 with
open(str(price_list_file_path
)) as pl_fd
:
110 price_list
= yaml
.safe_load_all(pl_fd
)
111 return next(price_list
)
113 def _price_list_with_project(self
, price_list
):
115 Figure out if this price list is with project or not.
116 Note: to handle the unlikely event that a project is called 'prices' we do not simply check if 'prices'
117 is in the dict keys for a price list sequence but rather go down one step in the nesting
118 in which we either have
119 1) 'prices:{vim_url:...}' if prices are also per project, or
120 2) '{vim_url:...}' if prices are only per vim
123 :return: True if project part of price list, else False
125 price_list_entry_keys
= set(price_list
[0].keys())
126 price_list_entry_keys
.remove("vnfd")
127 pl_key
= price_list_entry_keys
.pop()
128 entry_to_check
= price_list
[0][pl_key
][0].keys()
129 return True if "prices" in entry_to_check
else False
131 def _get_vnf_price_list(self
, price_list_file_path
, project_name
=None):
133 read vnf price list configuration file, determine its type and reformat content accordingly
135 :param price_list_file_path:
137 :return: dictionary formatted as {'<vnfd>': {'<vim-url>':'<price>'}}
139 price_list_data
= self
._read
_vnf
_price
_list
(price_list_file_path
)
140 if self
._price
_list
_with
_project
(price_list_data
):
142 for i
in price_list_data
:
145 if type(i
[project_name
]) is dict
146 else i
[project_name
][0]
149 i
["vim_name"]: i
["price"] for i
in price_data
["prices"]
151 res
.update({i
["vnfd"]: res_component
})
155 i
["vnfd"]: {i1
["vim_name"]: i1
["price"] for i1
in i
["prices"]}
156 for i
in price_list_data
159 def _get_pil_info(self
, pil_info_file_path
):
161 read and return pil information from file
162 :param pil_info_file_path: Path to pil_info file
163 :return pil configuration file content as Python object
165 with
open(str(pil_info_file_path
)) as pil_fd
:
166 data
= yaml
.safe_load_all(pil_fd
)
169 def _create_vnf_id_maps(self
, nsd
):
171 map identifier for 'member-vnf-index' in nsd to syntax that is safe for mzn
173 return tuples with mappings {<adjusted id>: <original id>} and {<original id>: <adjusted id>}
175 # TODO: Change for multiple DF support
176 ns_df
= nsd
.get("df", [{}])[0]
177 next_idx
= itertools
.count()
178 member_vnf_index2mzn
= {
179 e
["id"]: "VNF" + str(next(next_idx
)) for e
in ns_df
.get("vnf-profile", [])
182 # reverse the name map dictionary, used when the placement result is remapped
183 mzn_name2member_vnf_index
= {v
: k
for k
, v
in member_vnf_index2mzn
.items()}
185 return member_vnf_index2mzn
, mzn_name2member_vnf_index
187 async def get_placement(self
, nslcmop_id
):
189 - Collects and prepares placement information.
190 - Request placement computation.
191 - Formats and distribute placement result
193 Note: exceptions result in empty response message
199 nslcmop
= self
._get
_nslcmop
(nslcmop_id
)
200 nsd
= self
._get
_nsd
(nslcmop
["operationParams"]["nsdId"])
201 member_vnf_index2mzn
, mzn2member_vnf_index
= self
._create
_vnf
_id
_maps
(nsd
)
202 # adjust vnf identifiers
203 # TODO: Change for multiple DF support
204 ns_df
= nsd
.get("df", [{}])[0]
205 for vnf_profile
in ns_df
.get("vnf-profile", []):
206 vnf_profile
["id"] = member_vnf_index2mzn
[vnf_profile
["id"]]
207 for vlc
in vnf_profile
.get("virtual-link-connectivity", []):
208 for ccpd
in vlc
.get("constituent-cpd-id", []):
209 ccpd
["constituent-base-element-id"] = member_vnf_index2mzn
[
210 ccpd
["constituent-base-element-id"]
212 self
.log
.info("adjusted nsd: {}".format(nsd
))
213 projects
= self
._get
_projects
()
214 self
.log
.info("projects: {}".format(projects
))
215 nslcmop_project
= nslcmop
["_admin"]["projects_read"][0]
216 self
.log
.info("nslcmop_project: {}".format(nslcmop_project
))
217 valid_vim_accounts
= nslcmop
["operationParams"]["validVimAccounts"]
218 vim_accounts_data
= self
._get
_vim
_accounts
(valid_vim_accounts
)
219 vims_information
= {_
["name"]: _
["_id"] for _
in vim_accounts_data
}
220 price_list
= self
._get
_vnf
_price
_list
(
221 Server
.vnf_price_list_file
, projects
[nslcmop_project
]
223 pil_info
= self
._get
_pil
_info
(Server
.pil_price_list_file
)
224 pinnings
= nslcmop
["operationParams"].get("vnf", [])
225 # remap member-vnf-index values according to id map
226 for pinning
in pinnings
:
227 pinning
["member-vnf-index"] = member_vnf_index2mzn
[
228 pinning
["member-vnf-index"]
230 self
.log
.info("pinnings: {}".format(pinnings
))
231 order_constraints
= nslcmop
["operationParams"].get("placement-constraints")
232 self
.log
.info("order constraints: {}".format(order_constraints
))
234 nspd
= NsPlacementDataFactory(
235 vims_information
, price_list
, nsd
, pil_info
, pinnings
, order_constraints
236 ).create_ns_placement_data()
238 vnf_placement
= MznPlacementConductor(self
.log
).do_placement_computation(
242 except Exception as e
:
243 # Note: there is no cure for failure so we have a catch-all clause here
244 self
.log
.exception("PLA fault. Exception: {}".format(e
))
247 # remap names in vnf_placement
248 for e
in vnf_placement
:
249 e
["member-vnf-index"] = mzn2member_vnf_index
[e
["member-vnf-index"]]
250 await self
.msgBus
.aiowrite(
253 {"placement": {"vnf": vnf_placement
, "nslcmopId": nslcmop_id
}},
256 def handle_kafka_command(self
, topic
, command
, params
):
257 self
.log
.info("Kafka msg arrived: {} {} {}".format(topic
, command
, params
))
258 if topic
== "pla" and command
== "get_placement":
259 nslcmop_id
= params
.get("nslcmopId")
260 asyncio
.create_task(self
.get_placement(nslcmop_id
))
262 async def kafka_read(self
):
263 self
.log
.info("Task kafka_read start")
267 await self
.msgBus
.aioread(topics
, self
.handle_kafka_command
)
268 except Exception as e
:
269 self
.log
.error("kafka read error. Exception: {}".format(e
))
270 await asyncio
.sleep(5)
273 asyncio
.run(self
.kafka_read())
275 self
.msgBus
.disconnect()