src/emuvim/api/rest/rest_api_endpoint.py

   1 # Copyright (c) 2015 SONATA-NFV and Paderborn University
   2 # ALL RIGHTS RESERVED.
   3 #
   4 # Licensed under the Apache License, Version 2.0 (the "License");
   5 # you may not use this file except in compliance with the License.
   6 # You may obtain a copy of the License at
   7 #
   8 #    http://www.apache.org/licenses/LICENSE-2.0
   9 #
  10 # Unless required by applicable law or agreed to in writing, software
  11 # distributed under the License is distributed on an "AS IS" BASIS,
  12 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13 # See the License for the specific language governing permissions and
  14 # limitations under the License.
  15 #
  16 # Neither the name of the SONATA-NFV, Paderborn University
  17 # nor the names of its contributors may be used to endorse or promote
  18 # products derived from this software without specific prior written
  19 # permission.
  20 #
  21 # This work has been performed in the framework of the SONATA project,
  22 # funded by the European Commission under Grant number 671517 through
  23 # the Horizon 2020 and 5G-PPP programmes. The authors would like to
  24 # acknowledge the contributions of their colleagues of the SONATA
  25 # partner consortium (www.sonata-nfv.eu).
  26
  27 import logging
  28 import threading
  29 from flask import Flask
  30 from flask_restful import Api
  31 from gevent.pywsgi import WSGIServer
  32
  33 # need to import total module to set its global variable dcs
  34 import compute
  35 from compute import ComputeList, Compute, ComputeResources, DatacenterList, DatacenterStatus
  36
  37 # need to import total module to set its global variable net
  38 import network
  39 from network import NetworkAction, DrawD3jsgraph
  40
  41 import monitor
  42 from monitor import MonitorInterfaceAction, MonitorFlowAction, MonitorLinkAction, MonitorSkewAction, MonitorTerminal
  43
  44 import pkg_resources
  45 from os import path
  46
  47 logging.basicConfig()
  48
  49
  50 class RestApiEndpoint(object):
  51     """
  52     Simple API endpoint that offers a REST
  53     interface. This interface will be used by the
  54     default command line client.
  55     """
  56
  57     def __init__(self, listenip, port, DCnetwork=None):
  58         self.ip = listenip
  59         self.port = port
  60
  61         # connect this DC network to the rest api endpoint (needed for the
  62         # networking and monitoring api)
  63         self.connectDCNetwork(DCnetwork)
  64
  65         # setup Flask
  66         # find directory of dashboard files
  67         dashboard_file = pkg_resources.resource_filename(
  68             'emuvim.dashboard', "index.html")
  69         dashboard_dir = path.dirname(dashboard_file)
  70         logging.info("Started emu dashboard: {0}".format(dashboard_dir))
  71
  72         self.app = Flask(__name__, static_folder=dashboard_dir,
  73                          static_url_path='/dashboard')
  74         self.api = Api(self.app)
  75
  76         # setup endpoints
  77
  78         # compute related actions (start/stop VNFs, get info)
  79         self.api.add_resource(
  80             Compute, "/restapi/compute/<dc_label>/<compute_name>")
  81         self.api.add_resource(ComputeList,
  82                               "/restapi/compute",
  83                               "/restapi/compute/<dc_label>")
  84         self.api.add_resource(
  85             ComputeResources, "/restapi/compute/resources/<dc_label>/<compute_name>")
  86
  87         self.api.add_resource(
  88             DatacenterStatus, "/restapi/datacenter/<dc_label>")
  89         self.api.add_resource(DatacenterList, "/restapi/datacenter")
  90
  91         # network related actions (setup chaining between VNFs)
  92         self.api.add_resource(NetworkAction,
  93                               "/restapi/network")
  94         self.api.add_resource(DrawD3jsgraph,
  95                               "/restapi/network/d3jsgraph")
  96
  97         # monitoring related actions
  98         # export a network interface traffic rate counter
  99         self.api.add_resource(MonitorInterfaceAction,
 100                               "/restapi/monitor/interface")
 101         # export flow traffic counter, of a manually pre-installed flow entry,
 102         # specified by its cookie
 103         self.api.add_resource(MonitorFlowAction,
 104                               "/restapi/monitor/flow")
 105         # install monitoring of a specific flow on a pre-existing link in the service.
 106         # the traffic counters of the newly installed monitor flow are exported
 107         self.api.add_resource(MonitorLinkAction,
 108                               "/restapi/monitor/link")
 109         # install skewness monitor of resource usage disribution
 110         # the skewness metric is exported
 111         self.api.add_resource(MonitorSkewAction,
 112                               "/restapi/monitor/skewness")
 113         # start a terminal window for the specified vnfs
 114         self.api.add_resource(MonitorTerminal,
 115                               "/restapi/monitor/term")
 116
 117         logging.debug("Created API endpoint %s(%s:%d)" %
 118                       (self.__class__.__name__, self.ip, self.port))
 119
 120     def connectDatacenter(self, dc):
 121         compute.dcs[dc.label] = dc
 122         logging.info(
 123             "Connected DC(%s) to API endpoint %s(%s:%d)" % (dc.label, self.__class__.__name__, self.ip, self.port))
 124
 125     def connectDCNetwork(self, DCnetwork):
 126         network.net = DCnetwork
 127         monitor.net = DCnetwork
 128
 129         logging.info("Connected DCNetwork to API endpoint %s(%s:%d)" % (
 130             self.__class__.__name__, self.ip, self.port))
 131
 132     def start(self):
 133         self.thread = threading.Thread(target=self._start_flask, args=())
 134         self.thread.daemon = True
 135         self.thread.start()
 136         logging.info("Started API endpoint @ http://%s:%d" %
 137                      (self.ip, self.port))
 138
 139     def stop(self):
 140         if self.http_server:
 141             self.http_server.close()
 142
 143     def _start_flask(self):
 144         # self.app.run(self.ip, self.port, debug=False, use_reloader=False)
 145         # this should be a more production-fit http-server
 146         # self.app.logger.setLevel(logging.ERROR)
 147         self.http_server = WSGIServer((self.ip, self.port),
 148                                       self.app,
 149                                       # This disables HTTP request logs to not
 150                                       # mess up the CLI when e.g. the
 151                                       # auto-updated dashboard is used
 152                                       log=open("/dev/null", "w")
 153                                       )
 154         self.http_server.serve_forever()