Migrates POL code from MON repo

[osm/POL.git] / osm_policy_module / common / lcm_client.py

diff --git a/osm_policy_module/common/lcm_client.py b/osm_policy_module/common/lcm_client.py
new file mode 100644 (file)
index 0000000..7857d26
--- /dev/null
+++ b/osm_policy_module/common/lcm_client.py
@@ -0,0 +1,89 @@
+# -*- coding: utf-8 -*-
+
+# Copyright 2018 Whitestack, LLC
+# *************************************************************
+
+# This file is part of OSM Monitoring module
+# All Rights Reserved to Whitestack, LLC
+
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License. You may obtain
+# a copy of the License at
+
+#         http://www.apache.org/licenses/LICENSE-2.0
+
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+
+# For those usages not covered by the Apache License, Version 2.0 please
+# contact: bdiaz@whitestack.com or glavado@whitestack.com
+##
+import datetime
+import json
+import logging
+import time
+import uuid
+
+from kafka import KafkaProducer
+from osm_common import dbmongo
+
+from osm_policy_module.core.config import Config
+
+log = logging.getLogger(__name__)
+
+
+class LcmClient:
+    def __init__(self):
+        cfg = Config.instance()
+        self.kafka_server = '{}:{}'.format(cfg.OSMPOL_MESSAGE_HOST,
+                                           cfg.OSMPOL_MESSAGE_PORT)
+        self.producer = KafkaProducer(bootstrap_servers=self.kafka_server,
+                                      key_serializer=str.encode,
+                                      value_serializer=str.encode)
+        self.common_db = dbmongo.DbMongo()
+        self.common_db.db_connect({'host': cfg.OSMPOL_DATABASE_HOST,
+                                   'port': int(cfg.OSMPOL_DATABASE_PORT),
+                                   'name': 'osm'})
+
+    def scale(self, nsr_id: str, scaling_group_name: str, vnf_member_index: int, action: str):
+        nslcmop = self._generate_nslcmop(nsr_id, scaling_group_name, vnf_member_index, action)
+        self.common_db.create("nslcmops", nslcmop)
+        log.info("Sending scale action message: %s", json.dumps(nslcmop))
+        self.producer.send(topic='ns', key='scale', value=json.dumps(nslcmop))
+        self.producer.flush()
+
+    def _generate_nslcmop(self, nsr_id: str, scaling_group_name: str, vnf_member_index: int, action: str):
+        _id = str(uuid.uuid4())
+        now = time.time()
+        params = {
+            "scaleType": "SCALE_VNF",
+            "scaleVnfData": {
+                "scaleVnfType": action.upper(),
+                "scaleByStepData": {
+                    "scaling-group-descriptor": scaling_group_name,
+                    "member-vnf-index": str(vnf_member_index)
+                }
+            },
+            "scaleTime": "{}Z".format(datetime.datetime.utcnow().isoformat())
+        }
+
+        nslcmop = {
+            "id": _id,
+            "_id": _id,
+            "operationState": "PROCESSING",
+            "statusEnteredTime": now,
+            "nsInstanceId": nsr_id,
+            "lcmOperationType": "scale",
+            "startTime": now,
+            "isAutomaticInvocation": True,
+            "operationParams": params,
+            "isCancelPending": False,
+            "links": {
+                "self": "/osm/nslcm/v1/ns_lcm_op_occs/" + _id,
+                "nsInstance": "/osm/nslcm/v1/ns_instances/" + nsr_id,
+            }
+        }
+        return nslcmop