geni/aggregate.py

   1 import os
   2 import sys
   3 import datetime
   4 import time
   5 import xmlrpclib
   6
   7 from geni.util.geniserver import GeniServer
   8 from geni.util.geniclient import *
   9 from geni.util.cert import Keypair, Certificate
  10 from geni.util.credential import Credential
  11 from geni.util.trustedroot import TrustedRootList
  12 from geni.util.excep import *
  13 from geni.util.misc import *
  14 from geni.util.config import Config
  15 from geni.util.rspec import Rspec
  16 from geni.util.specdict import *
  17 from geni.util.storage import SimpleStorage
  18
  19 class Aggregate(GeniServer):
  20
  21     hrn = None
  22     nodes_ttl = None
  23     nodes = None
  24     slices = None
  25     policy = None
  26     timestamp = None
  27     threshold = None
  28     shell = None
  29     registry = None
  30     key_file = None
  31     cert_file = None
  32     credential = None
  33
  34     ##
  35     # Create a new aggregate object.
  36     #
  37     # @param ip the ip address to listen on
  38     # @param port the port to listen on
  39     # @param key_file private key filename of registry
  40     # @param cert_file certificate filename containing public key (could be a GID file)
  41
  42     def __init__(self, ip, port, key_file, cert_file, config = "/usr/share/geniwrapper/geni/util/geni_config"):
  43         GeniServer.__init__(self, ip, port, key_file, cert_file)
  44         self.key_file = key_file
  45         self.cert_file = cert_file
  46         self.config = Config(config)
  47         self.basedir = self.config.GENI_BASE_DIR + os.sep
  48         self.server_basedir = self.basedir + os.sep + "geni" + os.sep
  49         self.hrn = self.config.GENI_INTERFACE_HRN
  50
  51         nodes_file = os.sep.join([self.server_basedir, 'agg.' + self.hrn + '.components'])
  52         self.nodes = SimpleStorage(nodes_file)
  53         self.nodes.load()
  54
  55         slices_file = os.sep.join([self.server_basedir, 'agg.' + self.hrn + '.slices'])
  56         self.slices = SimpleStorage(slices_file)
  57         self.slices.load()
  58
  59         policy_file = os.sep.join([self.server_basedir, 'agg.' + self.hrn + '.policy'])
  60         self.policy = SimpleStorage(policy_file, {'whitelist': [], 'blacklist': []})
  61         self.policy.load()
  62
  63         timestamp_file = os.sep.join([self.server_basedir, 'agg.' + self.hrn + '.timestamp'])
  64         self.timestamp = SimpleStorage(timestamp_file)
  65
  66         self.nodes_ttl = 1
  67
  68         self.connectPLC()
  69         self.connectRegistry()
  70         #self.loadCredential()
  71
  72     def connectRegistry(self):
  73         """
  74         Connect to the registry
  75         """
  76         # connect to registry using GeniClient
  77         address = self.config.GENI_REGISTRY_HOSTNAME
  78         port = self.config.GENI_REGISTRY_PORT
  79         url = 'https://%(address)s:%(port)s' % locals()
  80         self.registry = GeniClient(url, self.key_file, self.cert_file)
  81
  82
  83     def connectPLC(self):
  84         """
  85         Connect to the plc api interface. First attempt to impor thte shell, if that fails
  86         try to connect to the xmlrpc server.
  87         """
  88         self.auth = {'Username': self.config.GENI_PLC_USER,
  89                      'AuthMethod': 'password',
  90                      'AuthString': self.config.GENI_PLC_PASSWORD}
  91
  92         try:
  93            # try to import PLC.Shell directly
  94             sys.path.append(self.config.GENI_PLC_SHELL_PATH)
  95             import PLC.Shell
  96             self.shell = PLC.Shell.Shell(globals())
  97             self.shell.AuthCheck()
  98         except ImportError:
  99             # connect to plc api via xmlrpc
 100             plc_host = self.config.GENI_PLC_HOST
 101             plc_port = self.config.GENI_PLC_PORT
 102             plc_api_path = self.config.GENI_PLC_API_PATH
 103             url = "https://%(plc_host)s:%(plc_port)s/%(plc_api_path)s/" % locals()
 104             self.auth = {'Username': self.config.GENI_PLC_USER,
 105                  'AuthMethod': 'password',
 106                  'AuthString': self.config.GENI_PLC_PASSWORD}
 107
 108             self.shell = xmlrpclib.Server(url, verbose = 0, allow_none = True)
 109             self.shell.AuthCheck(self.auth)
 110
 111     def loadCredential(self):
 112         """
 113         Attempt to load credential from file if it exists. If it doesnt get
 114         credential from registry.
 115         """
 116
 117         self_cred_filename = self.server_basedir + os.sep + "agg." + self.hrn + ".cred"
 118         ma_cred_filename = self.server_basedir + os.sep + "agg." + self.hrn + ".ma.cred"
 119
 120         # see if this file exists
 121         try:
 122             cred = Credential(filename = ma_cred_filename, subject=self.hrn)
 123             self.credential = cred.save_to_string()
 124         except IOError:
 125             # get self credential
 126             self_cred = self.registry.get_credential(None, 'ma', self.hrn)
 127             self_credential = Credential(string = self_cred)
 128             self_credential.save_to_file(self_cred_filename)
 129
 130             # get ma credential
 131             ma_cred = self.registry.get_credential(self_cred)
 132             ma_credential = Credential(string = ma_cred)
 133             ma_credential.save_to_file(ma_cred_filename)
 134             self.credential = ma_cred
 135
 136     def hostname_to_hrn(self, login_base, hostname):
 137         """
 138         Convert hrn to plantelab name.
 139         """
 140         genihostname = "_".join(hostname.split("."))
 141         return ".".join([self.hrn, login_base, genihostname])
 142
 143     def slicename_to_hrn(self, slicename):
 144         """
 145         Convert hrn to planetlab name.
 146         """
 147         slicename = slicename.replace("_", ".")
 148         return ".".join([self.hrn, slicename])
 149
 150     def refresh_components(self):
 151         """
 152         Update the cached list of nodes and save in 4 differnt formats
 153         (rspec, dns, ip, hrn)
 154         """
 155
 156         node_details = {}
 157         # get node list in rspec format
 158         rspec = Rspec()
 159         rspec.parseString(self.get_rspec(self.hrn, 'aggregate'))
 160         # filter nodes according to policy
 161         rspec.filter('NodeSpec', 'name', blacklist=self.policy['blacklist'], whitelist=self.policy['whitelist'])
 162         # extract ifspec info to get ip's
 163         ips = []
 164         ifspecs = rspec.getDictsByTagName('IfSpec')
 165         for ifspec in ifspecs:
 166             if ifspec.has_key('addr') and ifspec['addr']:
 167                 ips.append(ifspec['addr'])
 168
 169         # resolve component hostnames
 170         nodes = self.shell.GetNodes(self.auth, {}, ['hostname', 'site_id', 'slice_ids_whitelist'])
 171
 172         # resolve site login_bases
 173         site_ids = [node['site_id'] for node in nodes]
 174         sites = self.shell.GetSites(self.auth, site_ids, ['site_id', 'login_base'])
 175         site_dict = {}
 176         for site in sites:
 177             site_dict[site['site_id']] = site['login_base']
 178
 179         # filter nodes according to policy policy
 180         # filter nodes with whitelist
 181         # convert plc names to geni hrn
 182         nodedict = {}
 183         for node in nodes:
 184             node_hrn = self.hostname_to_hrn(site_dict[node['site_id']], node['hostname'])
 185             # filter nodes with a whitelist
 186             if node.has_key('slice_ids_whitelist') and node['slice_ids_whitelist']:
 187                 continue
 188             # Do not allow nodes not found in whitelist policy
 189             if self.policy['whitelist'] and node_hrn not in self.polciy['whitelist']:
 190                 continue
 191             # Do not allow nodes found in blacklist policy
 192             if self.policy['blacklist'] and node_hrn in self.policy['blacklist']:
 193                 continue
 194             nodedict[node_hrn] = node['hostname']
 195
 196
 197         node_details['rspec'] = rspec.toxml()
 198         node_details['hrn'] = nodedict.keys()
 199         node_details['dns'] = nodedict.values()
 200         node_details['ip'] = ips
 201         # save state
 202         self.nodes = SimpleStorage(self.nodes.db_filename, node_details)
 203         self.nodes.write()
 204
 205
 206         # update timestamp and threshold
 207         self.timestamp['timestamp'] =  datetime.datetime.now()
 208         delta = datetime.timedelta(hours=self.nodes_ttl)
 209         self.threshold = self.timestamp['timestamp'] + delta
 210         self.timestamp.write()
 211
 212     def load_components(self):
 213         """
 214         Read cached list of nodes.
 215         """
 216         # Read component list from cached file
 217         self.nodes.load()
 218         self.timestamp.load()
 219         time_format = "%Y-%m-%d %H:%M:%S"
 220         timestamp = self.timestamp['timestamp']
 221         self.timestamp['timestamp'] = datetime.datetime.fromtimestamp(time.mktime(time.strptime(timestamp, time_format)))
 222         delta = datetime.timedelta(hours=self.nodes_ttl)
 223         self.threshold = self.timestamp['timestamp'] + delta
 224
 225     def load_policy(self):
 226         """
 227         Read the list of blacklisted and whitelisted nodes.
 228         """
 229         self.policy.load()
 230
 231
 232     def getNodes(self, format = 'rspec'):
 233         """
 234         Return a list of components at this aggregate.
 235         """
 236         valid_formats = ['rspec', 'hrn', 'dns', 'ip']
 237         if not format:
 238             format = 'rspec'
 239         if format not in valid_formats:
 240             raise Exception, "Invalid format specified, must be one of the following: %s" \
 241                              % ", ".join(valid_formats)
 242
 243         # Reload components list
 244         now = datetime.datetime.now()
 245         #self.load_components()
 246         if not self.threshold or not self.timestamp['timestamp'] or now > self.threshold:
 247             self.refresh_components()
 248         elif now < self.threshold and not self.nodes.keys():
 249             self.load_components()
 250         return self.nodes[format]
 251
 252     def getSlices(self, hrn):
 253         """
 254         Return a list of instnatiated managed by this slice manager.
 255         """
 256
 257         # XX list only the slices at the specfied hrn
 258         return dict(self.slices)
 259
 260     def get_rspec(self, hrn, type):
 261         """
 262         Get resource information from PLC
 263         """
 264
 265         # Get the required nodes
 266         if type in ['aggregate']:
 267             nodes = self.shell.GetNodes(self.auth)
 268         elif type in ['slice']:
 269             slicename = hrn_to_pl_slicename(hrn)
 270             slices = self.shell.GetSlices(self.auth, [slicename])
 271             node_ids = slices[0]['node_ids']
 272             nodes = self.shell.GetNodes(self.auth, node_ids)
 273
 274         # Filter out whitelisted nodes
 275         public_nodes = lambda n: n.has_key('slice_ids_whitelist') and not n['slice_ids_whitelist']
 276         nodes = filter(public_nodes, nodes)
 277
 278         # Get all network interfaces
 279         interface_ids = []
 280         for node in nodes:
 281             interface_ids.extend(node['nodenetwork_ids'])
 282         interfaces = self.shell.GetNodeNetworks(self.auth, interface_ids)
 283         interface_dict = {}
 284         for interface in interfaces:
 285             interface_dict[interface['nodenetwork_id']] = interface
 286
 287         # join nodes with thier interfaces
 288         for node in nodes:
 289             node['interfaces'] = []
 290             for nodenetwork_id in node['nodenetwork_ids']:
 291                 node['interfaces'].append(interface_dict[nodenetwork_id])
 292
 293         # convert and threshold to ints
 294         if self.timestamp.has_key('timestamp') and self.timestamp['timestamp']:
 295             timestamp = self.timestamp['timestamp']
 296             threshold = self.threshold
 297         else:
 298             timestamp = datetime.datetime.now()
 299             delta = datetime.timedelta(hours=self.nodes_ttl)
 300             threshold = timestamp + delta
 301
 302
 303         start_time = int(timestamp.strftime("%s"))
 304         end_time = int(threshold.strftime("%s"))
 305         duration = end_time - start_time
 306
 307         # create the plc dict
 308         networks = [{'nodes': nodes, 'name': self.hrn, 'start_time': start_time, 'duration': duration}]
 309         resources = {'networks': networks, 'start_time': start_time, 'duration': duration}
 310
 311         # convert the plc dict to an rspec dict
 312         resourceDict = RspecDict(resources)
 313         # convert the rspec dict to xml
 314         rspec = Rspec()
 315         rspec.parseDict(resourceDict)
 316         return rspec.toxml()
 317
 318     def getResources(self, slice_hrn):
 319         """
 320         Return the current rspec for the specified slice.
 321         """
 322         rspec = self.get_rspec(slice_hrn, 'slice')
 323
 324         return rspec
 325
 326
 327     def createSlice(self, slice_hrn, rspec, attributes = []):
 328         """
 329         Instantiate the specified slice according to whats defined in the rspec.
 330         """
 331
 332         spec = Rspec(rspec)
 333         # save slice state locally
 334         # we can assume that spec object has been validated so its safer to
 335         # save this instead of the unvalidated rspec the user gave us
 336         self.slices[slice_hrn] = spec.toxml()
 337         self.slices.write()
 338
 339         # Get slice info
 340         slicename = hrn_to_pl_slicename(slice_hrn)
 341         slices = self.shell.GetSlices(self.auth, [slicename], ['node_ids'])
 342         if not slices:
 343             raise RecordNotFound(slice_hrn)
 344         slice = slices[0]
 345
 346         # find out where this slice is currently running
 347         nodes = self.shell.GetNodes(self.auth, slice['node_ids'], ['hostname'])
 348         hostnames = [node['hostname'] for node in nodes]
 349
 350         # get netspec details
 351         nodespecs = spec.getDictsByTagName('NodeSpec')
 352         nodes = [nodespec['name'] for nodespec in nodespecs]
 353
 354         # save slice state locally
 355         # we can assume that spec object has been validated so its safer to
 356         # save this instead of the unvalidated rspec the user gave us
 357         self.slices[slice_hrn] = spec.toxml()
 358         self.slices.write()
 359
 360         # remove nodes not in rspec
 361         deleted_nodes = list(set(hostnames).difference(nodes))
 362         # add nodes from rspec
 363         added_nodes = list(set(nodes).difference(hostnames))
 364
 365         self.shell.AddSliceToNodes(self.auth, slicename, added_nodes)
 366         self.shell.DeleteSliceFromNodes(self.auth, slicename, deleted_nodes)
 367
 368         for attribute in attributes:
 369             type, value, node, nodegroup = attribute['type'], attribute['value'], attribute['node'], attribute['nodegroup']
 370             self.shell.AddSliceAttribute(self.auth, slicename, type, value, node, nodegroup)
 371
 372         # contact registry to get slice users and add them to the slice
 373         #slice_record = self.registry.resolve(self.credential, slice_hrn)
 374         # persons = slice_record['users']
 375
 376         #for person in persons:
 377         #    shell.AddPersonToSlice(person['email'], slice_name)
 378         return 1
 379
 380     def updateSlice(self, slice_hrn, rspec, attributes = []):
 381         return self.create_slice(slice_hrn, rspec, attributes)
 382
 383     def deleteSlice(self, slice_hrn):
 384         """
 385         Remove this slice from all components it was previouly associated with and
 386         free up the resources it was using.
 387         """
 388         if self.slices.has_key(slice_hrn):
 389             self.slices.pop(slice_hrn)
 390             self.slices.write()
 391
 392         slicename = hrn_to_pl_slicename(slice_hrn)
 393         slices = self.shell.GetSlices(self.auth, [slicename])
 394         if not slices:
 395             return 1
 396         slice = slices[0]
 397
 398         self.shell.DeleteSliceFromNodes(self.auth, slicename, slice['node_ids'])
 399         return 1
 400
 401     def startSlice(self, slice_hrn):
 402         """
 403         Stop the slice at plc.
 404         """
 405         slicename = hrn_to_pl_slicename(slice_hrn)
 406         slices = self.shell.GetSlices(self.auth, {'name': slicename}, ['slice_id'])
 407         if not slices:
 408             #raise RecordNotFound(slice_hrn)
 409             return 1
 410         slice_id = slices[0]
 411         atrribtes = self.shell.GetSliceAttributes({'slice_id': slice_id, 'name': 'enabled'}, ['slice_attribute_id'])
 412         attribute_id = attreibutes[0]
 413         self.shell.UpdateSliceAttribute(self.auth, attribute_id, "1" )
 414         return 1
 415
 416     def stopSlice(self, slice_hrn):
 417         """
 418         Stop the slice at plc
 419         """
 420         slicename = hrn_to_pl_slicename(slice_hrn)
 421         slices = self.shell.GetSlices(self.auth, {'name': slicename}, ['slice_id'])
 422         if not slices:
 423             #raise RecordNotFound(slice_hrn)
 424             return 1
 425         slice_id = slices[0]
 426         atrribtes = self.shell.GetSliceAttributes({'slice_id': slice_id, 'name': 'enabled'}, ['slice_attribute_id'])
 427         attribute_id = attreibutes[0]
 428         self.shell.UpdateSliceAttribute(self.auth, attribute_id, "0")
 429         return 1
 430
 431
 432     def resetSlice(self, slice_hrn):
 433         """
 434         Reset the slice
 435         """
 436         # XX not yet implemented
 437         return 1
 438
 439     def getPolicy(self):
 440         """
 441         Return this aggregates policy.
 442         """
 443
 444         return self.policy
 445
 446
 447
 448 ##############################
 449 ## Server methods here for now
 450 ##############################
 451
 452
 453     # XX fix rights, should be function name defined in
 454     # privilege_table (from util/rights.py)
 455     def list_nodes(self, cred, format):
 456         self.decode_authentication(cred, 'listnodes')
 457         return self.getNodes(format)
 458
 459     def list_slices(self, cred, hrn):
 460         self.decode_authentication(cred, 'listslices')
 461         return self.getSlices(hrn)
 462
 463     def get_resources(self, cred, hrn):
 464         self.decode_authentication(cred, 'listnodes')
 465         return self.getResources(hrn)
 466
 467     def get_policy(self, cred):
 468         self.decode_authentication(cred, 'getpolicy')
 469         return self.getPolicy()
 470
 471     def create_slice(self, cred, hrn, rspec):
 472         self.decode_authentication(cred, 'createslice')
 473         return self.createSlice(hrn, rspec)
 474
 475     def update_slice(self, cred, hrn, rspec):
 476         self.decode_authentication(cred, 'updateslice')
 477         return self.updateSlice(hrn)
 478
 479     def delete_slice(self, cred, hrn):
 480         self.decode_authentication(cred, 'deleteslice')
 481         return self.deleteSlice(hrn)
 482
 483     def start_slice(self, cred, hrn):
 484         self.decode_authentication(cred, 'startslice')
 485         return self.startSlice(hrn)
 486
 487     def stop_slice(self, cred, hrn):
 488         self.decode_authentication(cred, 'stopslice')
 489         return self.stopSlice(hrn)
 490
 491     def reset_slice(self, cred, hrn):
 492         self.decode_authentication(cred, 'resetslice')
 493         return self.resetSlice(hrn)
 494
 495     def register_functions(self):
 496         GeniServer.register_functions(self)
 497
 498         # Aggregate interface methods
 499         self.server.register_function(self.list_nodes)
 500         self.server.register_function(self.list_slices)
 501         self.server.register_function(self.get_resources)
 502         self.server.register_function(self.get_policy)
 503         self.server.register_function(self.create_slice)
 504         self.server.register_function(self.update_slice)
 505         self.server.register_function(self.delete_slice)
 506         self.server.register_function(self.start_slice)
 507         self.server.register_function(self.stop_slice)
 508         self.server.register_function(self.reset_slice)
 509