src/emuvim/api/zerorpc/compute.py

   1 """
   2 Distributed Cloud Emulator (dcemulator)
   3 (c) 2015 by Manuel Peuster <manuel.peuster@upb.de>
   4 """
   5
   6 import logging
   7 import threading
   8 import zerorpc
   9
  10 logging.basicConfig(level=logging.INFO)
  11
  12
  13 class ZeroRpcApiEndpoint(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):
  24         self.dcs = {}
  25         self.ip = listenip
  26         self.port = port
  27         logging.debug("Created API endpoint %s(%s:%d)" % (
  28             self.__class__.__name__, self.ip, self.port))
  29
  30     def connectDatacenter(self, dc):
  31         self.dcs[dc.label] = dc
  32         logging.info("Connected DC(%s) to API endpoint %s(%s:%d)" % (
  33             dc.label, self.__class__.__name__, self.ip, self.port))
  34
  35     def start(self):
  36         thread = threading.Thread(target=self._api_server_thread, args=())
  37         thread.daemon = True
  38         thread.start()
  39         logging.debug("Started API endpoint %s(%s:%d)" % (
  40             self.__class__.__name__, self.ip, self.port))
  41
  42     def _api_server_thread(self):
  43         s = zerorpc.Server(MultiDatacenterApi(self.dcs))
  44         s.bind("tcp://%s:%d" % (self.ip, self.port))
  45         s.run()
  46
  47
  48 class MultiDatacenterApi(object):
  49     """
  50         Just pass through the corresponding request to the
  51         selected data center. Do not implement provisioning
  52         logic here because will will have multiple API
  53         endpoint implementations at the end.
  54     """
  55
  56     def __init__(self, dcs):
  57         self.dcs = dcs
  58
  59     def compute_action_start(self, dc_label, compute_name, image, network=None, command=None):
  60         """
  61         Start a new compute instance: A docker container
  62         :param dc_label: name of the DC
  63         :param compute_name: compute container name
  64         :param image: image name
  65         :param command: command to execute
  66         :param network: list of all interface of the vnf, with their parameters (id=id1,ip=x.x.x.x/x),...
  67         :return: networks list({"id":"input","ip": "10.0.0.254/8"}, {"id":"output","ip": "11.0.0.254/24"})
  68         """
  69         # TODO what to return UUID / given name / internal name ?
  70         logging.debug("RPC CALL: compute start")
  71         try:
  72             c = self.dcs.get(dc_label).startCompute(
  73                 compute_name, image=image, command=command, network=network)
  74             #return str(c.name)
  75             # return docker inspect dict
  76             return c.getStatus()
  77         except Exception as ex:
  78             logging.exception("RPC error.")
  79             return ex.message
  80
  81     def compute_action_stop(self, dc_label, compute_name):
  82         logging.debug("RPC CALL: compute stop")
  83         try:
  84             return self.dcs.get(dc_label).stopCompute(compute_name)
  85         except Exception as ex:
  86             logging.exception("RPC error.")
  87             return ex.message
  88
  89     def compute_list(self, dc_label):
  90         logging.debug("RPC CALL: compute list")
  91         try:
  92             if dc_label is None:
  93                 # return list with all compute nodes in all DCs
  94                 all_containers = []
  95                 for dc in self.dcs.itervalues():
  96                     all_containers += dc.listCompute()
  97                 return [(c.name, c.getStatus())
  98                         for c in all_containers]
  99             else:
 100                 # return list of compute nodes for specified DC
 101                 return [(c.name, c.getStatus())
 102                         for c in self.dcs.get(dc_label).listCompute()]
 103         except Exception as ex:
 104             logging.exception("RPC error.")
 105             return ex.message
 106
 107     def compute_status(self, dc_label, compute_name):
 108         logging.debug("RPC CALL: compute status")
 109         try:
 110             return self.dcs.get(
 111                 dc_label).containers.get(compute_name).getStatus()
 112         except Exception as ex:
 113             logging.exception("RPC error.")
 114             return ex.message
 115
 116     def datacenter_list(self):
 117         logging.debug("RPC CALL: datacenter list")
 118         try:
 119             return [d.getStatus() for d in self.dcs.itervalues()]
 120         except Exception as ex:
 121             logging.exception("RPC error.")
 122             return ex.message
 123
 124     def datacenter_status(self, dc_label):
 125         logging.debug("RPC CALL: datacenter status")
 126         try:
 127                 return self.dcs.get(dc_label).getStatus()
 128         except Exception as ex:
 129             logging.exception("RPC error.")
 130             return ex.message