--- /dev/null
+# -*- 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 json
+import logging
+import random
+import uuid
+
+from kafka import KafkaProducer, KafkaConsumer
+
+from osm_policy_module.core.config import Config
+
+log = logging.getLogger(__name__)
+
+
+class MonClient:
+ def __init__(self):
+ cfg = Config.instance()
+ self.kafka_server = '{}:{}'.format(cfg.get('policy_module', 'kafka_server_host'),
+ cfg.get('policy_module', 'kafka_server_port'))
+ self.producer = KafkaProducer(bootstrap_servers=self.kafka_server,
+ key_serializer=str.encode,
+ value_serializer=str.encode)
+
+ def create_alarm(self, metric_name: str, ns_id: str, vdu_name: str, vnf_member_index: str, threshold: int,
+ statistic: str, operation: str):
+ cor_id = random.randint(1, 1000000)
+ msg = self._create_alarm_payload(cor_id, metric_name, ns_id, vdu_name, vnf_member_index, threshold, statistic,
+ operation)
+ log.info("Sending create_alarm_request %s", msg)
+ future = self.producer.send(topic='alarm_request', key='create_alarm_request', value=json.dumps(msg))
+ future.get(timeout=60)
+ consumer = KafkaConsumer(bootstrap_servers=self.kafka_server,
+ key_deserializer=bytes.decode,
+ value_deserializer=bytes.decode,
+ consumer_timeout_ms=10000)
+ consumer.subscribe(['alarm_response'])
+ for message in consumer:
+ if message.key == 'create_alarm_response':
+ content = json.loads(message.value)
+ log.info("Received create_alarm_response %s", content)
+ if self._is_alarm_response_correlation_id_eq(cor_id, content):
+ alarm_uuid = content['alarm_create_response']['alarm_uuid']
+ # TODO Handle error response
+ return alarm_uuid
+
+ raise ValueError('Timeout: No alarm creation response from MON. Is MON up?')
+
+ def _create_alarm_payload(self, cor_id: int, metric_name: str, ns_id: str, vdu_name: str, vnf_member_index: str,
+ threshold: int, statistic: str, operation: str):
+ alarm_create_request = {
+ 'correlation_id': cor_id,
+ 'alarm_name': str(uuid.uuid4()),
+ 'metric_name': metric_name,
+ 'ns_id': ns_id,
+ 'vdu_name': vdu_name,
+ 'vnf_member_index': vnf_member_index,
+ 'operation': operation,
+ 'severity': 'critical',
+ 'threshold_value': threshold,
+ 'statistic': statistic
+ }
+ msg = {
+ 'alarm_create_request': alarm_create_request,
+ }
+ return msg
+
+ def _is_alarm_response_correlation_id_eq(self, cor_id, message_content):
+ return message_content['alarm_create_response']['correlation_id'] == cor_id