plugins/OpenStack/Gnocchi/metrics.py

   1 # Copyright 2017 Intel Research and Development Ireland Limited
   2 # *************************************************************
   3
   4 # This file is part of OSM Monitoring module
   5 # All Rights Reserved to Intel Corporation
   6
   7 # Licensed under the Apache License, Version 2.0 (the "License"); you may
   8 # not use this file except in compliance with the License. You may obtain
   9 # a copy of the License at
  10
  11 #         http://www.apache.org/licenses/LICENSE-2.0
  12
  13 # Unless required by applicable law or agreed to in writing, software
  14 # distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
  15 # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
  16 # License for the specific language governing permissions and limitations
  17 # under the License.
  18
  19 # For those usages not covered by the Apache License, Version 2.0 please
  20 # contact: helena.mcgough@intel.com or adrian.hoban@intel.com
  21 ##
  22 """Carry out OpenStack metric requests via Gnocchi API."""
  23
  24 import datetime
  25 import json
  26 import logging as log
  27 import time
  28
  29 from core.message_bus.producer import KafkaProducer
  30
  31 from kafka import KafkaConsumer
  32
  33 from plugins.OpenStack.common import Common
  34 from plugins.OpenStack.response import OpenStack_Response
  35
  36 __author__ = "Helena McGough"
  37
  38 METRIC_MAPPINGS = {
  39     "average_memory_utilization": "memory.percent",
  40     "disk_read_ops": "disk.disk_ops",
  41     "disk_write_ops": "disk.disk_ops",
  42     "disk_read_bytes": "disk.disk_octets",
  43     "disk_write_bytes": "disk.disk_octets",
  44     "packets_dropped": "interface.if_dropped",
  45     "packets_received": "interface.if_packets",
  46     "packets_sent": "interface.if_packets",
  47     "cpu_utilization": "cpu.percent",
  48 }
  49
  50 PERIOD_MS = {
  51     "HR": 3600000,
  52     "DAY": 86400000,
  53     "WEEK": 604800000,
  54     "MONTH": 2629746000,
  55     "YEAR": 31556952000
  56 }
  57
  58
  59 class Metrics(object):
  60     """OpenStack metric requests performed via the Gnocchi API."""
  61
  62     def __init__(self):
  63         """Initialize the metric actions."""
  64         self._common = Common()
  65
  66         # TODO(mcgoughh): Initialize a generic consumer object to consume
  67         # message from the SO. This is hardcoded for now
  68         server = {'server': 'localhost:9092', 'topic': 'metric_request'}
  69         self._consumer = KafkaConsumer(server['topic'],
  70                                        group_id='osm_mon',
  71                                        bootstrap_servers=server['server'])
  72
  73         # Use the Response class to generate valid json response messages
  74         self._response = OpenStack_Response()
  75
  76         # Initializer a producer to send responses back to SO
  77         self._producer = KafkaProducer("metric_response")
  78
  79     def metric_calls(self):
  80         """Consume info from the message bus to manage metric requests."""
  81         # Consumer check for metric messages
  82         for message in self._consumer:
  83             # Check if this plugin should carry out this request
  84             values = json.loads(message.value)
  85             vim_type = values['vim_type'].lower()
  86
  87             if vim_type == "openstack":
  88                 # Generate auth_token and endpoint
  89                 auth_token, endpoint = self.authenticate()
  90
  91                 if message.key == "create_metric_request":
  92                     # Configure metric
  93                     metric_details = values['metric_create']
  94                     metric_id, resource_id, status = self.configure_metric(
  95                         endpoint, auth_token, metric_details)
  96
  97                     # Generate and send a create metric response
  98                     try:
  99                         resp_message = self._response.generate_response(
 100                             'create_metric_response', status=status,
 101                             cor_id=values['correlation_id'],
 102                             metric_id=metric_id, r_id=resource_id)
 103                         self._producer.create_metrics_resp(
 104                             'create_metric_response', resp_message,
 105                             'metric_response')
 106                     except Exception as exc:
 107                         log.warn("Failed to create response: %s", exc)
 108
 109                 elif message.key == "read_metric_data_request":
 110                     # Read all metric data related to a specified metric
 111                     timestamps, metric_data = self.read_metric_data(
 112                         endpoint, auth_token, values)
 113
 114                     # Generate and send a response message
 115                     try:
 116                         resp_message = self._response.generate_response(
 117                             'read_metric_data_response',
 118                             m_id=values['metric_uuid'],
 119                             m_name=values['metric_name'],
 120                             r_id=values['resource_uuid'],
 121                             cor_id=values['correlation_id'],
 122                             times=timestamps, metrics=metric_data)
 123                         self._producer.read_metric_data_response(
 124                             'read_metric_data_response', resp_message,
 125                             'metric_response')
 126                     except Exception as exc:
 127                         log.warn("Failed to send read metric response:%s", exc)
 128
 129                 elif message.key == "delete_metric_request":
 130                     # delete the specified metric in the request
 131                     metric_id = values['metric_uuid']
 132                     status = self.delete_metric(
 133                         endpoint, auth_token, metric_id)
 134
 135                     # Generate and send a response message
 136                     try:
 137                         resp_message = self._response.generate_response(
 138                             'delete_metric_response', m_id=metric_id,
 139                             m_name=values['metric_name'],
 140                             status=status, r_id=values['resource_uuid'],
 141                             cor_id=values['correlation_id'])
 142                         self._producer.delete_metric_response(
 143                             'delete_metric_response', resp_message,
 144                             'metric_response')
 145                     except Exception as exc:
 146                         log.warn("Failed to send delete response:%s", exc)
 147
 148                 elif message.key == "update_metric_request":
 149                     # Gnocchi doesn't support configuration updates
 150                     # Log and send a response back to this effect
 151                     log.warn("Gnocchi doesn't support metric configuration\
 152                               updates.")
 153                     req_details = values['metric_create']
 154                     metric_name = req_details['metric_name']
 155                     resource_id = req_details['resource_uuid']
 156                     metric_id = self.get_metric_id(
 157                         endpoint, auth_token, metric_name, resource_id)
 158
 159                     # Generate and send a response message
 160                     try:
 161                         resp_message = self._response.generate_response(
 162                             'update_metric_response', status=False,
 163                             cor_id=values['correlation_id'],
 164                             r_id=resource_id, m_id=metric_id)
 165                         self._producer.update_metric_response(
 166                             'update_metric_response', resp_message,
 167                             'metric_response')
 168                     except Exception as exc:
 169                         log.warn("Failed to send an update response:%s", exc)
 170
 171                 elif message.key == "list_metric_request":
 172                     list_details = values['metrics_list_request']
 173
 174                     metric_list = self.list_metrics(
 175                         endpoint, auth_token, list_details)
 176
 177                     # Generate and send a response message
 178                     try:
 179                         resp_message = self._response.generate_response(
 180                             'list_metric_response', m_list=metric_list,
 181                             cor_id=list_details['correlation_id'])
 182                         self._producer.list_metric_response(
 183                             'list_metric_response', resp_message,
 184                             'metric_response')
 185                     except Exception as exc:
 186                         log.warn("Failed to send a list response:%s", exc)
 187
 188                 else:
 189                     log.warn("Unknown key, no action will be performed.")
 190             else:
 191                 log.debug("Message is not for this OpenStack.")
 192
 193         return
 194
 195     def configure_metric(self, endpoint, auth_token, values):
 196         """Create the new metric in Gnocchi."""
 197         try:
 198             resource_id = values['resource_uuid']
 199         except KeyError:
 200             log.warn("Resource is not defined correctly.")
 201             return None, None, False
 202
 203         # Check/Normalize metric name
 204         metric_name, norm_name = self.get_metric_name(values)
 205         if norm_name is None:
 206             log.warn("This metric is not supported by this plugin.")
 207             return None, resource_id, False
 208
 209         # Check for an existing metric for this resource
 210         metric_id = self.get_metric_id(
 211             endpoint, auth_token, metric_name, resource_id)
 212
 213         if metric_id is None:
 214             # Try appending metric to existing resource
 215             try:
 216                 base_url = "{}/v1/resource/generic/%s/metric"
 217                 res_url = base_url.format(endpoint) % resource_id
 218                 payload = {metric_name: {'archive_policy_name': 'high',
 219                                          'unit': values['metric_unit']}}
 220                 result = self._common._perform_request(
 221                     res_url, auth_token, req_type="post",
 222                     payload=json.dumps(payload))
 223                 # Get id of newly created metric
 224                 for row in json.loads(result.text):
 225                     if row['name'] == metric_name:
 226                         metric_id = row['id']
 227                 log.info("Appended metric to existing resource.")
 228
 229                 return metric_id, resource_id, True
 230             except Exception as exc:
 231                 # Gnocchi version of resource does not exist creating a new one
 232                 log.info("Failed to append metric to existing resource:%s",
 233                          exc)
 234                 try:
 235                     url = "{}/v1/resource/generic".format(endpoint)
 236                     metric = {'name': metric_name,
 237                               'archive_policy_name': 'high',
 238                               'unit': values['metric_unit'], }
 239
 240                     resource_payload = json.dumps({'id': resource_id,
 241                                                    'metrics': {
 242                                                        metric_name: metric}})
 243
 244                     resource = self._common._perform_request(
 245                         url, auth_token, req_type="post",
 246                         payload=resource_payload)
 247
 248                     # Return the newly created resource_id for creating alarms
 249                     new_resource_id = json.loads(resource.text)['id']
 250                     log.info("Created new resource for metric: %s",
 251                              new_resource_id)
 252
 253                     metric_id = self.get_metric_id(
 254                         endpoint, auth_token, metric_name, new_resource_id)
 255
 256                     return metric_id, new_resource_id, True
 257                 except Exception as exc:
 258                     log.warn("Failed to create a new resource:%s", exc)
 259             return None, None, False
 260
 261         else:
 262             log.info("This metric already exists for this resource.")
 263
 264         return metric_id, resource_id, False
 265
 266     def delete_metric(self, endpoint, auth_token, metric_id):
 267         """Delete metric."""
 268         url = "{}/v1/metric/%s".format(endpoint) % (metric_id)
 269
 270         try:
 271             result = self._common._perform_request(
 272                 url, auth_token, req_type="delete")
 273             if str(result.status_code) == "404":
 274                 log.warn("Failed to delete the metric.")
 275                 return False
 276             else:
 277                 return True
 278         except Exception as exc:
 279             log.warn("Failed to carry out delete metric request:%s", exc)
 280         return False
 281
 282     def list_metrics(self, endpoint, auth_token, values):
 283         """List all metrics."""
 284         url = "{}/v1/metric/".format(endpoint)
 285
 286         try:
 287             # Check if the metric_name was specified for the list
 288             metric_name = values['metric_name']
 289             result = self._common._perform_request(
 290                 url, auth_token, req_type="get")
 291             metric_list = json.loads(result.text)
 292
 293             # Format the list response
 294             metrics = self.response_list(
 295                 metric_list, metric_name=metric_name)
 296             return metrics
 297         except KeyError:
 298             log.debug("Metric name is not specified for this list.")
 299
 300         try:
 301             # Check if a resource_id was specified
 302             resource_id = values['resource_uuid']
 303             result = self._common._perform_request(
 304                 url, auth_token, req_type="get")
 305             metric_list = json.loads(result.text)
 306             # Format the list response
 307             metrics = self.response_list(
 308                 metric_list, resource=resource_id)
 309             return metrics
 310         except KeyError:
 311             log.debug("Resource id not specificed either, will return a\
 312                        complete list.")
 313             try:
 314                 result = self._common._perform_request(
 315                     url, auth_token, req_type="get")
 316                 metric_list = json.loads(result.text)
 317                 # Format the list response
 318                 metrics = self.response_list(metric_list)
 319                 return metrics
 320
 321             except Exception as exc:
 322                 log.warn("Failed to generate any metric list. %s", exc)
 323         return None
 324
 325     def get_metric_id(self, endpoint, auth_token, metric_name, resource_id):
 326         """Check if the desired metric already exists for the resource."""
 327         url = "{}/v1/resource/generic/%s".format(endpoint) % resource_id
 328
 329         try:
 330             # Try return the metric id if it exists
 331             result = self._common._perform_request(
 332                 url, auth_token, req_type="get")
 333             return json.loads(result.text)['metrics'][metric_name]
 334         except Exception:
 335             log.info("Metric doesn't exist. No metric_id available")
 336         return None
 337
 338     def get_metric_name(self, values):
 339         """Check metric name configuration and normalize."""
 340         try:
 341             # Normalize metric name
 342             metric_name = values['metric_name'].lower()
 343             return metric_name, METRIC_MAPPINGS[metric_name]
 344         except KeyError:
 345             log.info("Metric name %s is invalid.", metric_name)
 346         return metric_name, None
 347
 348     def read_metric_data(self, endpoint, auth_token, values):
 349         """Collectd metric measures over a specified time period."""
 350         timestamps = []
 351         data = []
 352         try:
 353             # Try and collect measures
 354             metric_id = values['metric_uuid']
 355             collection_unit = values['collection_unit'].upper()
 356             collection_period = values['collection_period']
 357
 358             # Define the start and end time based on configurations
 359             stop_time = time.strftime("%Y-%m-%d") + "T" + time.strftime("%X")
 360             end_time = int(round(time.time() * 1000))
 361             if collection_unit == 'YEAR':
 362                 diff = PERIOD_MS[collection_unit]
 363             else:
 364                 diff = collection_period * PERIOD_MS[collection_unit]
 365             s_time = (end_time - diff)/1000.0
 366             start_time = datetime.datetime.fromtimestamp(s_time).strftime(
 367                 '%Y-%m-%dT%H:%M:%S.%f')
 368             base_url = "{}/v1/metric/%(0)s/measures?start=%(1)s&stop=%(2)s"
 369             url = base_url.format(endpoint) % {
 370                 "0": metric_id, "1": start_time, "2": stop_time}
 371
 372             # Perform metric data request
 373             metric_data = self._common._perform_request(
 374                 url, auth_token, req_type="get")
 375
 376             # Generate a list of the requested timestamps and data
 377             for r in json.loads(metric_data.text):
 378                 timestamp = r[0].replace("T", " ")
 379                 timestamps.append(timestamp)
 380                 data.append(r[2])
 381
 382             return timestamps, data
 383         except Exception as exc:
 384             log.warn("Failed to gather specified measures: %s", exc)
 385         return timestamps, data
 386
 387     def authenticate(self):
 388         """Generate an authentication token and endpoint for metric request."""
 389         try:
 390             # Check for a tenant_id
 391             auth_token = self._common._authenticate()
 392             endpoint = self._common.get_endpoint("metric")
 393             return auth_token, endpoint
 394         except Exception as exc:
 395             log.warn("Authentication to Keystone failed: %s", exc)
 396
 397         return None, None
 398
 399     def response_list(self, metric_list, metric_name=None, resource=None):
 400         """Create the appropriate lists for a list response."""
 401         resp_list = []
 402
 403         for row in metric_list:
 404             if metric_name is not None:
 405                 if row['name'] == metric_name:
 406                     metric = {"metric_name": row['name'],
 407                               "metric_uuid": row['id'],
 408                               "metric_unit": row['unit'],
 409                               "resource_uuid": row['resource_id']}
 410                     resp_list.append(metric)
 411             elif resource is not None:
 412                 if row['resource_id'] == resource:
 413                     metric = {"metric_name": row['name'],
 414                               "metric_uuid": row['id'],
 415                               "metric_unit": row['unit'],
 416                               "resource_uuid": row['resource_id']}
 417                     resp_list.append(metric)
 418             else:
 419                 metric = {"metric_name": row['name'],
 420                           "metric_uuid": row['id'],
 421                           "metric_unit": row['unit'],
 422                           "resource_uuid": row['resource_id']}
 423                 resp_list.append(metric)
 424         return resp_list