src/emuvim/api/zerorpc/network.py

   1 """
   2 Distributed Cloud Emulator (dcemulator)
   3 """
   4
   5 import logging
   6 import threading
   7 import zerorpc
   8
   9
  10 logging.basicConfig(level=logging.INFO)
  11
  12
  13 class ZeroRpcApiEndpointDCNetwork(object):
  14     """
  15     Simple API endpoint that offers a zerorpc-based
  16     interface. This interface will be used by the
  17     default command line client.
  18     It can be used as a reference to implement
  19     REST interfaces providing the same semantics,
  20     like e.g. OpenStack compute API.
  21     """
  22
  23     def __init__(self, listenip, port, DCNetwork=None):
  24         if DCNetwork :
  25             self.connectDCNetwork(DCNetwork)
  26         self.ip = listenip
  27         self.port = port
  28         logging.debug("Created monitoring API endpoint %s(%s:%d)" % (
  29             self.__class__.__name__, self.ip, self.port))
  30
  31     def connectDCNetwork(self, net):
  32         self.net = net
  33         logging.info("Connected DCNetwork to API endpoint %s(%s:%d)" % (
  34             self.__class__.__name__, self.ip, self.port))
  35
  36     def start(self):
  37         thread = threading.Thread(target=self._api_server_thread, args=())
  38         thread.daemon = True
  39         thread.start()
  40         logging.debug("Started API endpoint %s(%s:%d)" % (
  41             self.__class__.__name__, self.ip, self.port))
  42
  43     def _api_server_thread(self):
  44         s = zerorpc.Server(DCNetworkApi(self.net))
  45         s.bind("tcp://%s:%d" % (self.ip, self.port))
  46         s.run()
  47
  48     def stop(self):
  49         logging.info("Stop the monitoring API endpoint")
  50         return
  51
  52
  53 class DCNetworkApi(object):
  54     """
  55         The networking and monitoring commands need the scope of the
  56         whole DC network to find the requested vnf. So this API is intended
  57         to work with a DCNetwork.
  58         Just pass through the corresponding request to the
  59         selected data center network. Do not implement provisioning
  60         logic here because will will have multiple API
  61         endpoint implementations at the end.
  62     """
  63
  64     def __init__(self, net):
  65         self.net = net
  66
  67     def network_action_start(self, vnf_src_name, vnf_dst_name, kwargs):
  68         # call DCNetwork method, not really datacenter specific API for now...
  69         # provided dc name needs to be part of API endpoint
  70         # no check if vnfs are really connected to this datacenter...
  71         logging.debug("RPC CALL: network chain start")
  72         try:
  73             c = self.net.setChain(
  74                 vnf_src_name, vnf_dst_name,
  75                 vnf_src_interface=kwargs.get('vnf_src_interface'),
  76                 vnf_dst_interface=kwargs.get('vnf_dst_interface'),
  77                 weight=kwargs.get('weight'),
  78                 match=kwargs.get('match'),
  79                 bidirectional=kwargs.get('bidirectional'),
  80                 cookie=kwargs.get('cookie'))
  81             return str(c)
  82         except Exception as ex:
  83             logging.exception("RPC error.")
  84             return ex.message
  85
  86     def network_action_stop(self, vnf_src_name, vnf_dst_name, kwargs):
  87         # call DCNetwork method, not really datacenter specific API for now...
  88         # provided dc name needs to be part of API endpoint
  89         # no check if vnfs are really connected to this datacenter...
  90         logging.debug("RPC CALL: network chain stop")
  91         try:
  92             c = self.net.setChain(
  93                 vnf_src_name, vnf_dst_name,
  94                 vnf_src_interface=kwargs.get('vnf_src_interface'),
  95                 vnf_dst_interface=kwargs.get('vnf_dst_interface'),
  96                 cmd='del-flows',
  97                 weight=kwargs.get('weight'),
  98                 match=kwargs.get('match'),
  99                 bidirectional=kwargs.get('bidirectional'))
 100             return c
 101         except Exception as ex:
 102             logging.exception("RPC error.")
 103             return ex.message
 104
 105     # setup the rate measurement for a vnf interface
 106     def setup_metric(self, vnf_name, vnf_interface, metric):
 107         logging.debug("RPC CALL: setup metric")
 108         try:
 109             c = self.net.monitor_agent.setup_metric(vnf_name, vnf_interface, metric)
 110             return c
 111         except Exception as ex:
 112             logging.exception("RPC error.")
 113             return ex.message
 114
 115     # remove the rate measurement for a vnf interface
 116     def stop_metric(self, vnf_name, vnf_interface, metric):
 117         logging.debug("RPC CALL: stop metric")
 118         try:
 119             c = self.net.monitor_agent.stop_metric(vnf_name, vnf_interface, metric)
 120             return c
 121         except Exception as ex:
 122             logging.exception("RPC error.")
 123             return ex.message
 124
 125
 126