src/nepi/testbeds/planetlab/execute.py

   1 #!/usr/bin/env python
   2 # -*- coding: utf-8 -*-
   3
   4 from constants import TESTBED_ID
   5 from nepi.core import testbed_impl
   6 import os
   7
   8 class TestbedController(testbed_impl.TestbedController):
   9     def __init__(self, testbed_version):
  10         super(TestbedController, self).__init__(TESTBED_ID, testbed_version)
  11         self._home_directory = None
  12         self.slicename = None
  13         self._traces = dict()
  14
  15         import node, interfaces, application
  16         self._node = node
  17         self._interfaces = interfaces
  18         self._app = application
  19
  20     @property
  21     def home_directory(self):
  22         return self._home_directory
  23
  24     @property
  25     def plapi(self):
  26         if not hasattr(self, '_plapi'):
  27             import plcapi
  28
  29             if self.authUser:
  30                 self._plapi = plcapi.PLCAPI(
  31                     username = self.authUser,
  32                     password = self.authString)
  33             else:
  34                 # anonymous access - may not be enough for much
  35                 self._plapi = plcapi.PLCAPI()
  36         return self._plapi
  37
  38     @property
  39     def slice_id(self):
  40         if not hasattr(self, '_slice_id'):
  41             slices = self.plapi.GetSlices(self.slicename, fields=('slice_id',))
  42             if slices:
  43                 self._slice_id = slices[0]['slice_id']
  44             else:
  45                 # If it wasn't found, don't remember this failure, keep trying
  46                 return None
  47         return self._slice_id
  48
  49     def do_setup(self):
  50         self._home_directory = self._attributes.\
  51             get_attribute_value("homeDirectory")
  52         self.slicename = self._attributes.\
  53             get_attribute_value("slice")
  54         self.authUser = self._attributes.\
  55             get_attribute_value("authUser")
  56         self.authString = self._attributes.\
  57             get_attribute_value("authPass")
  58
  59     def do_create(self):
  60         # Create node elements per XML data
  61         super(TestbedController, self).do_create()
  62
  63         # Perform resource discovery if we don't have
  64         # specific resources assigned yet
  65         self.do_resource_discovery()
  66
  67         # Create PlanetLab slivers
  68         self.do_provisioning()
  69
  70         # Wait for all nodes to be ready
  71         self.wait_nodes()
  72
  73     def do_resource_discovery(self):
  74         # Do what?
  75         pass
  76
  77     def do_provisioning(self):
  78         # Que te recontra?
  79         pass
  80
  81     def wait_nodes(self):
  82         # Suuure...
  83         pass
  84
  85     def set(self, time, guid, name, value):
  86         super(TestbedController, self).set(time, guid, name, value)
  87         # TODO: take on account schedule time for the task
  88         element = self._elements[guid]
  89         if element:
  90             setattr(element, name, value)
  91
  92     def get(self, time, guid, name):
  93         # TODO: take on account schedule time for the task
  94         element = self._elements.get(guid)
  95         if element:
  96             try:
  97                 if hasattr(element, name):
  98                     # Runtime attribute
  99                     return getattr(element, name)
 100                 else:
 101                     # Try design-time attributes
 102                     return self.box_get(time, guid, name)
 103             except KeyError, AttributeError:
 104                 return None
 105
 106     def get_route(self, guid, index, attribute):
 107         # TODO: fetch real data from planetlab
 108         try:
 109             return self.box_get_route(guid, int(index), attribute)
 110         except KeyError, AttributeError:
 111             return None
 112
 113     def get_address(self, guid, index, attribute='Address'):
 114         # TODO: fetch real data from planetlab
 115         try:
 116             return self.box_get_address(guid, int(index), attribute)
 117         except KeyError, AttributeError:
 118             return None
 119
 120
 121     def action(self, time, guid, action):
 122         raise NotImplementedError
 123
 124     def shutdown(self):
 125         for trace in self._traces.values():
 126             trace.close()
 127         for element in self._elements.values():
 128             element.destroy()
 129
 130     def trace_filename(self, guid, trace_id):
 131         # TODO: Need to be defined inside a home!!!! with and experiment id_code
 132         return os.path.join(self.home_directory, "%d_%s" % (guid, trace_id))
 133
 134     def follow_trace(self, trace_id, trace):
 135         self._traces[trace_id] = trace
 136
 137     def _make_node(self, parameters):
 138         node = self._node.Node(self.plapi)
 139
 140         # Note: there is 1-to-1 correspondence between attribute names
 141         #   If that changes, this has to change as well
 142         for attr,val in parameters.iteritems():
 143             setattr(node, attr, val)
 144
 145         return node
 146
 147     def _make_node_iface(self, parameters):
 148         iface = self._interfaces.NodeIface(self.plapi)
 149
 150         # Note: there is 1-to-1 correspondence between attribute names
 151         #   If that changes, this has to change as well
 152         for attr,val in parameters.iteritems():
 153             setattr(iface, attr, val)
 154
 155         return iface
 156
 157     def _make_tun_iface(self, parameters):
 158         iface = self._interfaces.TunIface(self.plapi)
 159
 160         # Note: there is 1-to-1 correspondence between attribute names
 161         #   If that changes, this has to change as well
 162         for attr,val in parameters.iteritems():
 163             setattr(iface, attr, val)
 164
 165         return iface
 166
 167     def _make_internet(self, parameters):
 168         return self._interfaces.Internet(self.plapi)
 169
 170     def _make_application(self, parameters):
 171         app = self._app.Application(self.plapi)
 172
 173         # Note: there is 1-to-1 correspondence between attribute names
 174         #   If that changes, this has to change as well
 175         for attr,val in parameters.iteritems():
 176             setattr(app, attr, val)
 177
 178         return app
 179
 180
 181