n2vc/vnf.py

   1
   2 import logging
   3 import os
   4 import os.path
   5 import re
   6 import ssl
   7 import sys
   8 import time
   9
  10 # FIXME: this should load the juju inside or modules without having to
  11 # explicitly install it. Check why it's not working.
  12 # Load our subtree of the juju library
  13 path = os.path.abspath(os.path.join(os.path.dirname(__file__), '..'))
  14 path = os.path.join(path, "modules/libjuju/")
  15 if path not in sys.path:
  16     sys.path.insert(1, path)
  17
  18 from juju.controller import Controller
  19 from juju.model import Model, ModelObserver
  20
  21
  22 # We might need this to connect to the websocket securely, but test and verify.
  23 try:
  24     ssl._create_default_https_context = ssl._create_unverified_context
  25 except AttributeError:
  26     # Legacy Python doesn't verify by default (see pep-0476)
  27     #   https://www.python.org/dev/peps/pep-0476/
  28     pass
  29
  30
  31 # Custom exceptions
  32 class JujuCharmNotFound(Exception):
  33     """The Charm can't be found or is not readable."""
  34
  35
  36 class JujuApplicationExists(Exception):
  37     """The Application already exists."""
  38
  39
  40 class N2VCPrimitiveExecutionFailed(Exception):
  41     """Something failed while attempting to execute a primitive."""
  42
  43
  44 # Quiet the debug logging
  45 logging.getLogger('websockets.protocol').setLevel(logging.INFO)
  46 logging.getLogger('juju.client.connection').setLevel(logging.WARN)
  47 logging.getLogger('juju.model').setLevel(logging.WARN)
  48 logging.getLogger('juju.machine').setLevel(logging.WARN)
  49
  50
  51 class VCAMonitor(ModelObserver):
  52     """Monitor state changes within the Juju Model."""
  53     log = None
  54     ns_name = None
  55     applications = {}
  56
  57     def __init__(self, ns_name):
  58         self.log = logging.getLogger(__name__)
  59
  60         self.ns_name = ns_name
  61
  62     def AddApplication(self, application_name, callback, *callback_args):
  63         if application_name not in self.applications:
  64             self.applications[application_name] = {
  65                 'callback': callback,
  66                 'callback_args': callback_args
  67             }
  68
  69     def RemoveApplication(self, application_name):
  70         if application_name in self.applications:
  71             del self.applications[application_name]
  72
  73     async def on_change(self, delta, old, new, model):
  74         """React to changes in the Juju model."""
  75
  76         if delta.entity == "unit":
  77             # Ignore change events from other applications
  78             if delta.data['application'] not in self.applications.keys():
  79                 return
  80
  81             try:
  82
  83                 application_name = delta.data['application']
  84
  85                 callback = self.applications[application_name]['callback']
  86                 callback_args = self.applications[application_name]['callback_args']
  87
  88                 if old and new:
  89                     old_status = old.workload_status
  90                     new_status = new.workload_status
  91
  92                     if old_status == new_status:
  93                         """The workload status may fluctuate around certain events,
  94                         so wait until the status has stabilized before triggering
  95                         the callback."""
  96                         if callback:
  97                             callback(
  98                                 self.ns_name,
  99                                 delta.data['application'],
 100                                 new_status,
 101                                 new.workload_status_message,
 102                                 *callback_args)
 103
 104                 if old and not new:
 105                     # This is a charm being removed
 106                     if callback:
 107                         callback(
 108                             self.ns_name,
 109                             delta.data['application'],
 110                             "removed",
 111                             "",
 112                             *callback_args)
 113             except Exception as e:
 114                 self.log.debug("[1] notify_callback exception {}".format(e))
 115         elif delta.entity == "action":
 116             # TODO: Decide how we want to notify the user of actions
 117
 118             # uuid = delta.data['id']     # The Action's unique id
 119             # msg = delta.data['message'] # The output of the action
 120             #
 121             # if delta.data['status'] == "pending":
 122             #     # The action is queued
 123             #     pass
 124             # elif delta.data['status'] == "completed""
 125             #     # The action was successful
 126             #     pass
 127             # elif delta.data['status'] == "failed":
 128             #     # The action failed.
 129             #     pass
 130
 131             pass
 132
 133 ########
 134 # TODO
 135 #
 136 # Create unique models per network service
 137 # Document all public functions
 138
 139
 140 class N2VC:
 141
 142     # Juju API
 143     api = None
 144     log = None
 145     controller = None
 146     connecting = False
 147     authenticated = False
 148
 149     models = {}
 150     default_model = None
 151
 152     # Model Observers
 153     monitors = {}
 154
 155     # VCA config
 156     hostname = ""
 157     port = 17070
 158     username = ""
 159     secret = ""
 160
 161     def __init__(self,
 162                  log=None,
 163                  server='127.0.0.1',
 164                  port=17070,
 165                  user='admin',
 166                  secret=None,
 167                  artifacts=None
 168                  ):
 169         """Initialize N2VC
 170
 171         :param vcaconfig dict A dictionary containing the VCA configuration
 172
 173         :param artifacts str The directory where charms required by a vnfd are
 174             stored.
 175
 176         :Example:
 177         n2vc = N2VC(vcaconfig={
 178             'secret': 'MzI3MDJhOTYxYmM0YzRjNTJiYmY1Yzdm',
 179             'user': 'admin',
 180             'ip-address': '10.44.127.137',
 181             'port': 17070,
 182             'artifacts': '/path/to/charms'
 183         })
 184
 185         """
 186
 187         if log:
 188             self.log = log
 189         else:
 190             self.log = logging.getLogger(__name__)
 191
 192         # Quiet websocket traffic
 193         logging.getLogger('websockets.protocol').setLevel(logging.INFO)
 194         logging.getLogger('juju.client.connection').setLevel(logging.WARN)
 195         logging.getLogger('model').setLevel(logging.WARN)
 196         # logging.getLogger('websockets.protocol').setLevel(logging.DEBUG)
 197
 198         self.log.debug('JujuApi: instantiated')
 199
 200         self.server = server
 201         self.port = port
 202
 203         self.secret = secret
 204         if user.startswith('user-'):
 205             self.user = user
 206         else:
 207             self.user = 'user-{}'.format(user)
 208
 209         self.endpoint = '%s:%d' % (server, int(port))
 210
 211         self.artifacts = artifacts
 212
 213     def __del__(self):
 214         """Close any open connections."""
 215         yield self.logout()
 216
 217     def notify_callback(self, model_name, application_name, status, message, callback=None, *callback_args):
 218         try:
 219             if callback:
 220                 callback(model_name, application_name, status, message, *callback_args)
 221         except Exception as e:
 222             self.log.error("[0] notify_callback exception {}".format(e))
 223             raise e
 224         return True
 225
 226     # Public methods
 227     async def CreateNetworkService(self, nsd):
 228         """Create a new model to encapsulate this network service.
 229
 230         Create a new model in the Juju controller to encapsulate the
 231         charms associated with a network service.
 232
 233         You can pass either the nsd record or the id of the network
 234         service, but this method will fail without one of them.
 235         """
 236         if not self.authenticated:
 237             await self.login()
 238
 239         # Ideally, we will create a unique model per network service.
 240         # This change will require all components, i.e., LCM and SO, to use
 241         # N2VC for 100% compatibility. If we adopt unique models for the LCM,
 242         # services deployed via LCM would't be manageable via SO and vice versa
 243
 244         return self.default_model
 245
 246     async def DeployCharms(self, model_name, application_name, vnfd, charm_path, params={}, machine_spec={}, callback=None, *callback_args):
 247         """Deploy one or more charms associated with a VNF.
 248
 249         Deploy the charm(s) referenced in a VNF Descriptor.
 250
 251         :param str model_name: The name of the network service.
 252         :param str application_name: The name of the application
 253         :param dict vnfd: The name of the application
 254         :param str charm_path: The path to the Juju charm
 255         :param dict params: A dictionary of runtime parameters
 256           Examples::
 257           {
 258             'rw_mgmt_ip': '1.2.3.4',
 259             # Pass the initial-config-primitives section of the vnf or vdu
 260             'initial-config-primitives': {...}
 261           }
 262         :param dict machine_spec: A dictionary describing the machine to install to
 263           Examples::
 264           {
 265             'hostname': '1.2.3.4',
 266             'username': 'ubuntu',
 267           }
 268         :param obj callback: A callback function to receive status changes.
 269         :param tuple callback_args: A list of arguments to be passed to the callback
 270         """
 271
 272         ########################################################
 273         # Verify the path to the charm exists and is readable. #
 274         ########################################################
 275         if not os.path.exists(charm_path):
 276             self.log.debug("Charm path doesn't exist: {}".format(charm_path))
 277             self.notify_callback(model_name, application_name, "failed", callback, *callback_args)
 278             raise JujuCharmNotFound("No artifacts configured.")
 279
 280         ################################
 281         # Login to the Juju controller #
 282         ################################
 283         if not self.authenticated:
 284             self.log.debug("Authenticating with Juju")
 285             await self.login()
 286
 287         ##########################################
 288         # Get the model for this network service #
 289         ##########################################
 290         # TODO: In a point release, we will use a model per deployed network
 291         # service. In the meantime, we will always use the 'default' model.
 292         model_name = 'default'
 293         model = await self.get_model(model_name)
 294
 295         ########################################
 296         # Verify the application doesn't exist #
 297         ########################################
 298         app = await self.get_application(model, application_name)
 299         if app:
 300             raise JujuApplicationExists("Can't deploy application \"{}\" to model \"{}\" because it already exists.".format(application_name, model_name))
 301
 302         ################################################################
 303         # Register this application with the model-level event monitor #
 304         ################################################################
 305         if callback:
 306             self.monitors[model_name].AddApplication(
 307                 application_name,
 308                 callback,
 309                 *callback_args
 310             )
 311
 312         ########################################################
 313         # Check for specific machine placement (native charms) #
 314         ########################################################
 315         to = ""
 316         if machine_spec.keys():
 317             # TODO: This needs to be tested.
 318             # if all(k in machine_spec for k in ['hostname', 'username']):
 319             #     # Enlist the existing machine in Juju
 320             #     machine = await self.model.add_machine(spec='ssh:%@%'.format(
 321             #         specs['host'],
 322             #         specs['user'],
 323             #     ))
 324             #     to = machine.id
 325             pass
 326
 327         #######################################
 328         # Get the initial charm configuration #
 329         #######################################
 330
 331         rw_mgmt_ip = None
 332         if 'rw_mgmt_ip' in params:
 333             rw_mgmt_ip = params['rw_mgmt_ip']
 334
 335         # initial_config = {}
 336         if 'initial-config-primitive' not in params:
 337             params['initial-config-primitive'] = {}
 338
 339         initial_config = self._get_config_from_dict(
 340             params['initial-config-primitive'],
 341             {'<rw_mgmt_ip>': rw_mgmt_ip}
 342         )
 343
 344         self.log.debug("JujuApi: Deploying charm ({}) from {}".format(
 345             application_name,
 346             charm_path,
 347             to=to,
 348         ))
 349
 350         ########################################################
 351         # Deploy the charm and apply the initial configuration #
 352         ########################################################
 353         app = await model.deploy(
 354             # We expect charm_path to be either the path to the charm on disk
 355             # or in the format of cs:series/name
 356             charm_path,
 357             # This is the formatted, unique name for this charm
 358             application_name=application_name,
 359             # Proxy charms should use the current LTS. This will need to be
 360             # changed for native charms.
 361             series='xenial',
 362             # Apply the initial 'config' primitive during deployment
 363             config=initial_config,
 364             # TBD: Where to deploy the charm to.
 365             to=None,
 366         )
 367
 368         # #######################################
 369         # # Execute initial config primitive(s) #
 370         # #######################################
 371         primitives = {}
 372
 373         # Build a sequential list of the primitives to execute
 374         for primitive in params['initial-config-primitive']:
 375             try:
 376                 if primitive['name'] == 'config':
 377                     # This is applied when the Application is deployed
 378                     pass
 379                 else:
 380                     seq = primitive['seq']
 381
 382                     params = {}
 383                     if 'parameter' in primitive:
 384                         params = primitive['parameter']
 385
 386                     primitives[seq] = {
 387                         'name': primitive['name'],
 388                         'parameters': self._map_primitive_parameters(
 389                             params,
 390                             {'<rw_mgmt_ip>': rw_mgmt_ip}
 391                         ),
 392                     }
 393
 394                     for primitive in sorted(primitives):
 395                         await self.ExecutePrimitive(
 396                             model_name,
 397                             application_name,
 398                             primitives[primitive]['name'],
 399                             callback,
 400                             callback_args,
 401                             **primitives[primitive]['parameters'],
 402                         )
 403             except N2VCPrimitiveExecutionFailed as e:
 404                 self.log.debug(
 405                     "[N2VC] Exception executing primitive: {}".format(e)
 406                 )
 407                 raise
 408
 409     async def GetPrimitiveStatus(self, model_name, uuid):
 410         results = None
 411         try:
 412             if not self.authenticated:
 413                 await self.login()
 414
 415             # FIXME: This is hard-coded until model-per-ns is added
 416             model_name = 'default'
 417
 418             model = await self.controller.get_model(model_name)
 419
 420             results = await model.get_action_output(uuid)
 421
 422             await model.disconnect()
 423         except Exception as e:
 424             self.log.debug(
 425                 "Caught exception while getting primitive status: {}".format(e)
 426             )
 427             raise N2VCPrimitiveExecutionFailed(e)
 428
 429         return results
 430
 431
 432     async def ExecutePrimitive(self, model_name, application_name, primitive, callback, *callback_args, **params):
 433         """Execute a primitive of a charm for Day 1 or Day 2 configuration.
 434
 435         Execute a primitive defined in the VNF descriptor.
 436
 437         :param str model_name: The name of the network service.
 438         :param str application_name: The name of the application
 439         :param str primitive: The name of the primitive to execute.
 440         :param obj callback: A callback function to receive status changes.
 441         :param tuple callback_args: A list of arguments to be passed to the callback function.
 442         :param dict params: A dictionary of key=value pairs representing the primitive's parameters
 443           Examples::
 444           {
 445             'rw_mgmt_ip': '1.2.3.4',
 446             # Pass the initial-config-primitives section of the vnf or vdu
 447             'initial-config-primitives': {...}
 448           }
 449         """
 450         uuid = None
 451         try:
 452             if not self.authenticated:
 453                 await self.login()
 454
 455             # FIXME: This is hard-coded until model-per-ns is added
 456             model_name = 'default'
 457
 458             model = await self.controller.get_model(model_name)
 459
 460             if primitive == 'config':
 461                 # config is special, and expecting params to be a dictionary
 462                 await self.set_config(
 463                     model,
 464                     application_name,
 465                     params['params'],
 466                 )
 467             else:
 468                 app = await self.get_application(model, application_name)
 469                 if app:
 470                     # Run against the first (and probably only) unit in the app
 471                     unit = app.units[0]
 472                     if unit:
 473                         self.log.debug(
 474                             "Executing primitive {}".format(primitive)
 475                         )
 476                         action = await unit.run_action(primitive, **params)
 477                         uuid = action.id
 478                 await model.disconnect()
 479         except Exception as e:
 480             self.log.debug(
 481                 "Caught exception while executing primitive: {}".format(e)
 482             )
 483             raise N2VCPrimitiveExecutionFailed(e)
 484         return uuid
 485
 486     async def RemoveCharms(self, model_name, application_name, callback=None, *callback_args):
 487         """Remove a charm from the VCA.
 488
 489         Remove a charm referenced in a VNF Descriptor.
 490
 491         :param str model_name: The name of the network service.
 492         :param str application_name: The name of the application
 493         :param obj callback: A callback function to receive status changes.
 494         :param tuple callback_args: A list of arguments to be passed to the callback function.
 495         """
 496         try:
 497             if not self.authenticated:
 498                 await self.login()
 499
 500             model = await self.get_model(model_name)
 501             app = await self.get_application(model, application_name)
 502             if app:
 503                 # Remove this application from event monitoring
 504                 self.monitors[model_name].RemoveApplication(application_name)
 505
 506                 # self.notify_callback(model_name, application_name, "removing", callback, *callback_args)
 507                 self.log.debug("Removing the application {}".format(application_name))
 508                 await app.remove()
 509
 510                 # Notify the callback that this charm has been removed.
 511                 self.notify_callback(model_name, application_name, "removed", callback, *callback_args)
 512
 513         except Exception as e:
 514             print("Caught exception: {}".format(e))
 515             self.log.debug(e)
 516             raise e
 517
 518     async def DestroyNetworkService(self, nsd):
 519         raise NotImplementedError()
 520
 521     async def GetMetrics(self, model_name, application_name):
 522         """Get the metrics collected by the VCA.
 523
 524         :param model_name The name of the model
 525         :param application_name The name of the application
 526         """
 527         metrics = {}
 528         model = await self.get_model(model_name)
 529         app = await self.get_application(model, application_name)
 530         if app:
 531             metrics = await app.get_metrics()
 532
 533         return metrics
 534
 535     # Non-public methods
 536     async def add_relation(self, a, b, via=None):
 537         """
 538         Add a relation between two application endpoints.
 539
 540         :param a An application endpoint
 541         :param b An application endpoint
 542         :param via The egress subnet(s) for outbound traffic, e.g.,
 543             (192.168.0.0/16,10.0.0.0/8)
 544         """
 545         if not self.authenticated:
 546             await self.login()
 547
 548         m = await self.get_model()
 549         try:
 550             m.add_relation(a, b, via)
 551         finally:
 552             await m.disconnect()
 553
 554     # async def apply_config(self, config, application):
 555     #     """Apply a configuration to the application."""
 556     #     print("JujuApi: Applying configuration to {}.".format(
 557     #         application
 558     #     ))
 559     #     return await self.set_config(application=application, config=config)
 560
 561     def _get_config_from_dict(self, config_primitive, values):
 562         """Transform the yang config primitive to dict.
 563
 564         Expected result:
 565
 566             config = {
 567                 'config':
 568             }
 569         """
 570         config = {}
 571         for primitive in config_primitive:
 572             if primitive['name'] == 'config':
 573                 # config = self._map_primitive_parameters()
 574                 for parameter in primitive['parameter']:
 575                     param = str(parameter['name'])
 576                     if parameter['value'] == "<rw_mgmt_ip>":
 577                         config[param] = str(values[parameter['value']])
 578                     else:
 579                         config[param] = str(parameter['value'])
 580
 581         return config
 582
 583     def _map_primitive_parameters(self, parameters, values):
 584         params = {}
 585         for parameter in parameters:
 586             param = str(parameter['name'])
 587             if parameter['value'] == "<rw_mgmt_ip>":
 588                 params[param] = str(values[parameter['value']])
 589             else:
 590                 params[param] = str(parameter['value'])
 591         return params
 592
 593     def _get_config_from_yang(self, config_primitive, values):
 594         """Transform the yang config primitive to dict."""
 595         config = {}
 596         for primitive in config_primitive.values():
 597             if primitive['name'] == 'config':
 598                 for parameter in primitive['parameter'].values():
 599                     param = str(parameter['name'])
 600                     if parameter['value'] == "<rw_mgmt_ip>":
 601                         config[param] = str(values[parameter['value']])
 602                     else:
 603                         config[param] = str(parameter['value'])
 604
 605         return config
 606
 607     def FormatApplicationName(self, *args):
 608         """
 609         Generate a Juju-compatible Application name
 610
 611         :param args tuple: Positional arguments to be used to construct the
 612         application name.
 613
 614         Limitations::
 615         - Only accepts characters a-z and non-consequitive dashes (-)
 616         - Application name should not exceed 50 characters
 617
 618         Examples::
 619
 620             FormatApplicationName("ping_pong_ns", "ping_vnf", "a")
 621         """
 622
 623         appname = ""
 624         for c in "-".join(list(args)):
 625             if c.isdigit():
 626                 c = chr(97 + int(c))
 627             elif not c.isalpha():
 628                 c = "-"
 629             appname += c
 630         return re.sub('\-+', '-', appname.lower())
 631
 632
 633     # def format_application_name(self, nsd_name, vnfr_name, member_vnf_index=0):
 634     #     """Format the name of the application
 635     #
 636     #     Limitations:
 637     #     - Only accepts characters a-z and non-consequitive dashes (-)
 638     #     - Application name should not exceed 50 characters
 639     #     """
 640     #     name = "{}-{}-{}".format(nsd_name, vnfr_name, member_vnf_index)
 641     #     new_name = ''
 642     #     for c in name:
 643     #         if c.isdigit():
 644     #             c = chr(97 + int(c))
 645     #         elif not c.isalpha():
 646     #             c = "-"
 647     #         new_name += c
 648     #     return re.sub('\-+', '-', new_name.lower())
 649
 650     def format_model_name(self, name):
 651         """Format the name of model.
 652
 653         Model names may only contain lowercase letters, digits and hyphens
 654         """
 655
 656         return name.replace('_', '-').lower()
 657
 658     async def get_application(self, model, application):
 659         """Get the deployed application."""
 660         if not self.authenticated:
 661             await self.login()
 662
 663         app = None
 664         if application and model:
 665             if model.applications:
 666                 if application in model.applications:
 667                     app = model.applications[application]
 668
 669         return app
 670
 671     async def get_model(self, model_name='default'):
 672         """Get a model from the Juju Controller.
 673
 674         Note: Model objects returned must call disconnected() before it goes
 675         out of scope."""
 676         if not self.authenticated:
 677             await self.login()
 678
 679         if model_name not in self.models:
 680             print("connecting to model {}".format(model_name))
 681             self.models[model_name] = await self.controller.get_model(model_name)
 682
 683             # Create an observer for this model
 684             self.monitors[model_name] = VCAMonitor(model_name)
 685             self.models[model_name].add_observer(self.monitors[model_name])
 686
 687         return self.models[model_name]
 688
 689     async def login(self):
 690         """Login to the Juju controller."""
 691
 692         if self.authenticated:
 693             return
 694
 695         self.connecting = True
 696
 697         self.log.debug("JujuApi: Logging into controller")
 698
 699         cacert = None
 700         self.controller = Controller()
 701
 702         if self.secret:
 703             self.log.debug("Connecting to controller... ws://{}:{} as {}/{}".format(self.endpoint, self.port, self.user, self.secret))
 704             await self.controller.connect(
 705                 endpoint=self.endpoint,
 706                 username=self.user,
 707                 password=self.secret,
 708                 cacert=cacert,
 709             )
 710         else:
 711             # current_controller no longer exists
 712             # self.log.debug("Connecting to current controller...")
 713             # await self.controller.connect_current()
 714             # await self.controller.connect(
 715             #     endpoint=self.endpoint,
 716             #     username=self.user,
 717             #     cacert=cacert,
 718             # )
 719             self.log.fatal("VCA credentials not configured.")
 720
 721         self.authenticated = True
 722         self.log.debug("JujuApi: Logged into controller")
 723
 724         # self.default_model = await self.controller.get_model("default")
 725
 726     async def logout(self):
 727         """Logout of the Juju controller."""
 728         if not self.authenticated:
 729             return
 730
 731         try:
 732             if self.default_model:
 733                 self.log.debug("Disconnecting model {}".format(self.default_model))
 734                 await self.default_model.disconnect()
 735                 self.default_model = None
 736
 737             for model in self.models:
 738                 await self.models[model].disconnect()
 739
 740             if self.controller:
 741                 self.log.debug("Disconnecting controller {}".format(self.controller))
 742                 await self.controller.disconnect()
 743                 # self.controller = None
 744
 745             self.authenticated = False
 746         except Exception as e:
 747             self.log.fail("Fatal error logging out of Juju Controller: {}".format(e))
 748             raise e
 749
 750
 751     # async def remove_application(self, name):
 752     #     """Remove the application."""
 753     #     if not self.authenticated:
 754     #         await self.login()
 755     #
 756     #     app = await self.get_application(name)
 757     #     if app:
 758     #         self.log.debug("JujuApi: Destroying application {}".format(
 759     #             name,
 760     #         ))
 761     #
 762     #         await app.destroy()
 763
 764     async def remove_relation(self, a, b):
 765         """
 766         Remove a relation between two application endpoints
 767
 768         :param a An application endpoint
 769         :param b An application endpoint
 770         """
 771         if not self.authenticated:
 772             await self.login()
 773
 774         m = await self.get_model()
 775         try:
 776             m.remove_relation(a, b)
 777         finally:
 778             await m.disconnect()
 779
 780     async def resolve_error(self, application=None):
 781         """Resolve units in error state."""
 782         if not self.authenticated:
 783             await self.login()
 784
 785         app = await self.get_application(self.default_model, application)
 786         if app:
 787             self.log.debug("JujuApi: Resolving errors for application {}".format(
 788                 application,
 789             ))
 790
 791             for unit in app.units:
 792                 app.resolved(retry=True)
 793
 794     async def run_action(self, application, action_name, **params):
 795         """Execute an action and return an Action object."""
 796         if not self.authenticated:
 797             await self.login()
 798         result = {
 799             'status': '',
 800             'action': {
 801                 'tag': None,
 802                 'results': None,
 803             }
 804         }
 805         app = await self.get_application(self.default_model, application)
 806         if app:
 807             # We currently only have one unit per application
 808             # so use the first unit available.
 809             unit = app.units[0]
 810
 811             self.log.debug("JujuApi: Running Action {} against Application {}".format(
 812                 action_name,
 813                 application,
 814             ))
 815
 816             action = await unit.run_action(action_name, **params)
 817
 818             # Wait for the action to complete
 819             await action.wait()
 820
 821             result['status'] = action.status
 822             result['action']['tag'] = action.data['id']
 823             result['action']['results'] = action.results
 824
 825         return result
 826
 827     async def set_config(self, model_name, application, config):
 828         """Apply a configuration to the application."""
 829         if not self.authenticated:
 830             await self.login()
 831
 832         app = await self.get_application(model_name, application)
 833         if app:
 834             self.log.debug("JujuApi: Setting config for Application {}".format(
 835                 application,
 836             ))
 837             await app.set_config(config)
 838
 839             # Verify the config is set
 840             newconf = await app.get_config()
 841             for key in config:
 842                 if config[key] != newconf[key]['value']:
 843                     self.log.debug("JujuApi: Config not set! Key {} Value {} doesn't match {}".format(key, config[key], newconf[key]))
 844
 845     # async def set_parameter(self, parameter, value, application=None):
 846     #     """Set a config parameter for a service."""
 847     #     if not self.authenticated:
 848     #         await self.login()
 849     #
 850     #     self.log.debug("JujuApi: Setting {}={} for Application {}".format(
 851     #         parameter,
 852     #         value,
 853     #         application,
 854     #     ))
 855     #     return await self.apply_config(
 856     #         {parameter: value},
 857     #         application=application,
 858         # )
 859
 860     async def wait_for_application(self, name, timeout=300):
 861         """Wait for an application to become active."""
 862         if not self.authenticated:
 863             await self.login()
 864
 865         app = await self.get_application(self.default_model, name)
 866         if app:
 867             self.log.debug(
 868                 "JujuApi: Waiting {} seconds for Application {}".format(
 869                     timeout,
 870                     name,
 871                 )
 872             )
 873
 874             await self.default_model.block_until(
 875                 lambda: all(
 876                     unit.agent_status == 'idle'
 877                     and unit.workload_status
 878                     in ['active', 'unknown'] for unit in app.units
 879                 ),
 880                 timeout=timeout
 881             )