sfa/managers/registry_manager.py

   1 import types
   2 # for get_key_from_incoming_ip
   3 import tempfile
   4 import os
   5 import commands
   6
   7 from sfa.util.faults import RecordNotFound, AccountNotEnabled, PermissionError, MissingAuthority, \
   8     UnknownSfaType, ExistingRecord, NonExistingRecord
   9 from sfa.util.sfatime import utcparse, datetime_to_epoch
  10 from sfa.util.prefixTree import prefixTree
  11 from sfa.util.xrn import Xrn, get_authority, hrn_to_urn, urn_to_hrn
  12 from sfa.util.version import version_core
  13 from sfa.util.sfalogging import logger
  14
  15 from sfa.util.printable import printable
  16
  17 from sfa.trust.gid import GID
  18 from sfa.trust.credential import Credential
  19 from sfa.trust.certificate import Certificate, Keypair, convert_public_key
  20 from sfa.trust.gid import create_uuid
  21
  22 from sfa.storage.model import make_record, RegRecord, RegAuthority, RegUser, RegSlice, RegKey, \
  23     augment_with_sfa_builtins
  24 ### the types that we need to exclude from sqlobjects before being able to dump
  25 # them on the xmlrpc wire
  26 from sqlalchemy.orm.collections import InstrumentedList
  27
  28 ### historical note -- april 2014
  29 # the myslice chaps rightfully complained about the following discrepancy
  30 # they found that
  31 # * read operations (resolve) expose stuff like e.g.
  32 #   'reg-researchers', or 'reg-pis', but that
  33 # * write operations (register, update) need e.g.
  34 #   'researcher' or 'pi' to be set - reg-* are just ignored
  35 #
  36 # the 'normalize' helper functions below aim at ironing this out
  37 # however in order to break as few code as possible we essentially make sure that *both* fields are set
  38 # upon entering the write methods (so again register and update) for legacy, as some driver code
  39 # might depend on the presence of, say, 'researcher'
  40
  41 # registry calls this 'reg-researchers'
  42 # some drivers call this 'researcher'
  43 # this is even more confusing as people might use 'researchers'
  44 def normalize_input_researcher (record):
  45     # this aims at detecting a mispelled input
  46     if 'researchers' in record and 'researcher' not in record:
  47         record['researcher']=record['researchers']
  48         del record['researchers']
  49     # this looks right, use this for both keys
  50     if 'reg-researchers' in record:
  51         # and issue a warning if they were both set as we're overwriting some user data here
  52         if 'researcher' in record:
  53             logger.warning ("normalize_input_researcher: incoming record has both values, using reg-researchers")
  54         record['researcher']=record['reg-researchers']
  55     # we only have one key set, duplicate for the other one
  56     elif 'researcher' in record:
  57         logger.warning ("normalize_input_researcher: you should use 'reg-researchers' instead ot 'researcher'")
  58         record['reg-researchers']=record['researcher']
  59     # if at this point we still have 'researchers' it's going to be ignored and that might be confusing
  60     if 'researchers' in record:
  61         logger.warning ("normalize_input_researcher: incoming record has confusing 'researchers' key - ignored - use 'reg-researchers' instead")
  62
  63 def normalize_input_record (record):
  64     normalize_input_researcher (record)
  65     return record
  66
  67 class RegistryManager:
  68
  69     def __init__ (self, config):
  70         logger.info("Creating RegistryManager[%s]"%id(self))
  71
  72     # The GENI GetVersion call
  73     def GetVersion(self, api, options):
  74         peers = dict ( [ (hrn,interface.get_url()) for (hrn,interface) in api.registries.iteritems()
  75                        if hrn != api.hrn])
  76         xrn=Xrn(api.hrn,type='authority')
  77         return version_core({'interface':'registry',
  78                              'sfa': 2,
  79                              'geni_api': 2,
  80                              'hrn':xrn.get_hrn(),
  81                              'urn':xrn.get_urn(),
  82                              'peers':peers})
  83
  84     def GetCredential(self, api, xrn, input_type, caller_xrn=None):
  85         # convert xrn to hrn
  86         if input_type:
  87             hrn, _ = urn_to_hrn(xrn)
  88             type = input_type
  89         else:
  90             hrn, type = urn_to_hrn(xrn)
  91
  92         # Slivers don't have credentials but users should be able to
  93         # specify a sliver xrn and receive the slice's credential
  94         # However if input_type is specified
  95         if type == 'sliver' or ( not input_type and '-' in Xrn(hrn).leaf):
  96             slice_xrn = api.driver.sliver_to_slice_xrn(hrn)
  97             hrn = slice_xrn.hrn
  98
  99         # Is this a root or sub authority
 100         auth_hrn = api.auth.get_authority(hrn)
 101         if not auth_hrn or hrn == api.config.SFA_INTERFACE_HRN:
 102             auth_hrn = hrn
 103         auth_info = api.auth.get_auth_info(auth_hrn)
 104
 105         # get record info
 106         dbsession = api.dbsession()
 107         record=dbsession.query(RegRecord).filter_by(type=type,hrn=hrn).first()
 108         if not record:
 109             raise RecordNotFound("hrn=%s, type=%s"%(hrn,type))
 110
 111         # get the callers gid
 112         # if caller_xrn is not specified assume the caller is the record
 113         # object itself.
 114         if not caller_xrn:
 115             caller_hrn = hrn
 116             caller_gid = record.get_gid_object()
 117         else:
 118             caller_hrn, caller_type = urn_to_hrn(caller_xrn)
 119             if caller_type:
 120                 caller_record = dbsession.query(RegRecord).filter_by(hrn=caller_hrn,type=caller_type).first()
 121             else:
 122                 caller_record = dbsession.query(RegRecord).filter_by(hrn=caller_hrn).first()
 123             if not caller_record:
 124                 raise RecordNotFound("Unable to associated caller (hrn=%s, type=%s) with credential for (hrn: %s, type: %s)"%(caller_hrn, caller_type, hrn, type))
 125             caller_gid = GID(string=caller_record.gid)
 126
 127         object_hrn = record.get_gid_object().get_hrn()
 128         # call the builtin authorization/credential generation engine
 129         rights = api.auth.determine_user_rights(caller_hrn, record)
 130         # make sure caller has rights to this object
 131         if rights.is_empty():
 132             raise PermissionError("%s has no rights to %s (%s)" % \
 133                                   (caller_hrn, object_hrn, xrn))
 134         object_gid = GID(string=record.gid)
 135         new_cred = Credential(subject = object_gid.get_subject())
 136         new_cred.set_gid_caller(caller_gid)
 137         new_cred.set_gid_object(object_gid)
 138         new_cred.set_issuer_keys(auth_info.get_privkey_filename(), auth_info.get_gid_filename())
 139         #new_cred.set_pubkey(object_gid.get_pubkey())
 140         new_cred.set_privileges(rights)
 141         new_cred.get_privileges().delegate_all_privileges(True)
 142         if hasattr(record,'expires'):
 143             date = utcparse(record.expires)
 144             expires = datetime_to_epoch(date)
 145             new_cred.set_expiration(int(expires))
 146         auth_kind = "authority,ma,sa"
 147         # Parent not necessary, verify with certs
 148         #new_cred.set_parent(api.auth.hierarchy.get_auth_cred(auth_hrn, kind=auth_kind))
 149         new_cred.encode()
 150         new_cred.sign()
 151
 152         return new_cred.save_to_string(save_parents=True)
 153
 154
 155     # the default for full, which means 'dig into the testbed as well', should be false
 156     def Resolve(self, api, xrns, type=None, details=False):
 157
 158         dbsession = api.dbsession()
 159         if not isinstance(xrns, types.ListType):
 160             # try to infer type if not set and we get a single input
 161             if not type:
 162                 type = Xrn(xrns).get_type()
 163             xrns = [xrns]
 164         hrns = [urn_to_hrn(xrn)[0] for xrn in xrns]
 165
 166         # load all known registry names into a prefix tree and attempt to find
 167         # the longest matching prefix
 168         # create a dict where key is a registry hrn and its value is a list
 169         # of hrns at that registry (determined by the known prefix tree).
 170         xrn_dict = {}
 171         registries = api.registries
 172         tree = prefixTree()
 173         registry_hrns = registries.keys()
 174         tree.load(registry_hrns)
 175         for xrn in xrns:
 176             registry_hrn = tree.best_match(urn_to_hrn(xrn)[0])
 177             if registry_hrn not in xrn_dict:
 178                 xrn_dict[registry_hrn] = []
 179             xrn_dict[registry_hrn].append(xrn)
 180
 181         records = []
 182         for registry_hrn in xrn_dict:
 183             # skip the hrn without a registry hrn
 184             # XX should we let the user know the authority is unknown?
 185             if not registry_hrn:
 186                 continue
 187
 188             # if the best match (longest matching hrn) is not the local registry,
 189             # forward the request
 190             xrns = xrn_dict[registry_hrn]
 191             if registry_hrn != api.hrn:
 192                 credential = api.getCredential()
 193                 interface = api.registries[registry_hrn]
 194                 server_proxy = api.server_proxy(interface, credential)
 195                 # should propagate the details flag but that's not supported in the xmlrpc interface yet
 196                 #peer_records = server_proxy.Resolve(xrns, credential,type, details=details)
 197                 peer_records = server_proxy.Resolve(xrns, credential)
 198                 # pass foreign records as-is
 199                 # previous code used to read
 200                 # records.extend([SfaRecord(dict=record).as_dict() for record in peer_records])
 201                 # not sure why the records coming through xmlrpc had to be processed at all
 202                 records.extend(peer_records)
 203
 204         # try resolving the remaining unfound records at the local registry
 205         local_hrns = list ( set(hrns).difference([record['hrn'] for record in records]) )
 206         #
 207         local_records = dbsession.query(RegRecord).filter(RegRecord.hrn.in_(local_hrns))
 208         if type:
 209             local_records = local_records.filter_by(type=type)
 210         local_records=local_records.all()
 211
 212         for local_record in local_records:
 213             augment_with_sfa_builtins (local_record)
 214
 215         logger.info("Resolve, (details=%s,type=%s) local_records=%s "%(details,type,local_records))
 216         local_dicts = [ record.__dict__ for record in local_records ]
 217
 218         if details:
 219             # in details mode we get as much info as we can, which involves contacting the
 220             # testbed for getting implementation details about the record
 221             api.driver.augment_records_with_testbed_info(local_dicts)
 222             # also we fill the 'url' field for known authorities
 223             # used to be in the driver code, sounds like a poorman thing though
 224             def solve_neighbour_url (record):
 225                 if not record.type.startswith('authority'): return
 226                 hrn=record.hrn
 227                 for neighbour_dict in [ api.aggregates, api.registries ]:
 228                     if hrn in neighbour_dict:
 229                         record.url=neighbour_dict[hrn].get_url()
 230                         return
 231             for record in local_records: solve_neighbour_url (record)
 232
 233         # convert local record objects to dicts for xmlrpc
 234         # xxx somehow here calling dict(record) issues a weird error
 235         # however record.todict() seems to work fine
 236         # records.extend( [ dict(record) for record in local_records ] )
 237         records.extend( [ record.todict(exclude_types=[InstrumentedList]) for record in local_records ] )
 238
 239         if not records:
 240             raise RecordNotFound(str(hrns))
 241
 242         return records
 243
 244     def List (self, api, xrn, origin_hrn=None, options={}):
 245         dbsession=api.dbsession()
 246         # load all know registry names into a prefix tree and attempt to find
 247         # the longest matching prefix
 248         hrn, type = urn_to_hrn(xrn)
 249         registries = api.registries
 250         registry_hrns = registries.keys()
 251         tree = prefixTree()
 252         tree.load(registry_hrns)
 253         registry_hrn = tree.best_match(hrn)
 254
 255         #if there was no match then this record belongs to an unknow registry
 256         if not registry_hrn:
 257             raise MissingAuthority(xrn)
 258         # if the best match (longest matching hrn) is not the local registry,
 259         # forward the request
 260         record_dicts = []
 261         if registry_hrn != api.hrn:
 262             credential = api.getCredential()
 263             interface = api.registries[registry_hrn]
 264             server_proxy = api.server_proxy(interface, credential)
 265             record_list = server_proxy.List(xrn, credential, options)
 266             # same as above, no need to process what comes from through xmlrpc
 267             # pass foreign records as-is
 268             record_dicts = record_list
 269
 270         # if we still have not found the record yet, try the local registry
 271 #        logger.debug("before trying local records, %d foreign records"% len(record_dicts))
 272         if not record_dicts:
 273             recursive = False
 274             if ('recursive' in options and options['recursive']):
 275                 recursive = True
 276             elif hrn.endswith('*'):
 277                 hrn = hrn[:-1]
 278                 recursive = True
 279
 280             if not api.auth.hierarchy.auth_exists(hrn):
 281                 raise MissingAuthority(hrn)
 282             if recursive:
 283                 records = dbsession.query(RegRecord).filter(RegRecord.hrn.startswith(hrn)).all()
 284 #                logger.debug("recursive mode, found %d local records"%(len(records)))
 285             else:
 286                 records = dbsession.query(RegRecord).filter_by(authority=hrn).all()
 287 #                logger.debug("non recursive mode, found %d local records"%(len(records)))
 288             # so that sfi list can show more than plain names...
 289             for record in records: augment_with_sfa_builtins (record)
 290             record_dicts=[ record.todict(exclude_types=[InstrumentedList]) for record in records ]
 291
 292         return record_dicts
 293
 294
 295     def CreateGid(self, api, xrn, cert):
 296         # get the authority
 297         authority = Xrn(xrn=xrn).get_authority_hrn()
 298         auth_info = api.auth.get_auth_info(authority)
 299         if not cert:
 300             pkey = Keypair(create=True)
 301         else:
 302             certificate = Certificate(string=cert)
 303             pkey = certificate.get_pubkey()
 304         gid = api.auth.hierarchy.create_gid(xrn, create_uuid(), pkey)
 305         return gid.save_to_string(save_parents=True)
 306
 307     ####################
 308     # utility for handling relationships among the SFA objects
 309
 310     # subject_record describes the subject of the relationships
 311     # ref_record contains the target values for the various relationships we need to manage
 312     # (to begin with, this is just the slice x person (researcher) and authority x person (pi) relationships)
 313     def update_driver_relations (self, api, subject_obj, ref_obj):
 314         type=subject_obj.type
 315         #for (k,v) in subject_obj.__dict__.items(): print k,'=',v
 316         if type=='slice' and hasattr(ref_obj,'researcher'):
 317             self.update_driver_relation(api, subject_obj, ref_obj.researcher, 'user', 'researcher')
 318         elif type=='authority' and hasattr(ref_obj,'pi'):
 319             self.update_driver_relation(api, subject_obj,ref_obj.pi, 'user', 'pi')
 320
 321     # field_key is the name of one field in the record, typically 'researcher' for a 'slice' record
 322     # hrns is the list of hrns that should be linked to the subject from now on
 323     # target_type would be e.g. 'user' in the 'slice' x 'researcher' example
 324     def update_driver_relation (self, api, record_obj, hrns, target_type, relation_name):
 325         dbsession=api.dbsession()
 326         # locate the linked objects in our db
 327         subject_type=record_obj.type
 328         subject_id=record_obj.pointer
 329         # get the 'pointer' field of all matching records
 330         link_id_tuples = dbsession.query(RegRecord.pointer).filter_by(type=target_type).filter(RegRecord.hrn.in_(hrns)).all()
 331         # sqlalchemy returns named tuples for columns
 332         link_ids = [ tuple.pointer for tuple in link_id_tuples ]
 333         api.driver.update_relation (subject_type, target_type, relation_name, subject_id, link_ids)
 334
 335     def Register(self, api, record_dict):
 336
 337         logger.debug("Register: entering with record_dict=%s"%printable(record_dict))
 338         normalize_input_record (record_dict)
 339         logger.debug("Register: normalized record_dict=%s"%printable(record_dict))
 340
 341         dbsession=api.dbsession()
 342         hrn, type = record_dict['hrn'], record_dict['type']
 343         urn = hrn_to_urn(hrn,type)
 344         # validate the type
 345         if type not in ['authority', 'slice', 'node', 'user']:
 346             raise UnknownSfaType(type)
 347
 348         # check if record_dict already exists
 349         existing_records = dbsession.query(RegRecord).filter_by(type=type,hrn=hrn).all()
 350         if existing_records:
 351             raise ExistingRecord(hrn)
 352
 353         assert ('type' in record_dict)
 354         # returns the right type of RegRecord according to type in record
 355         record = make_record(dict=record_dict)
 356         record.just_created()
 357         record.authority = get_authority(record.hrn)
 358         auth_info = api.auth.get_auth_info(record.authority)
 359         pub_key = None
 360         # make sure record has a gid
 361         if not record.gid:
 362             uuid = create_uuid()
 363             pkey = Keypair(create=True)
 364             if getattr(record,'keys',None):
 365                 pub_key=record.keys
 366                 # use only first key in record
 367                 if isinstance(record.keys, types.ListType):
 368                     pub_key = record.keys[0]
 369                 pkey = convert_public_key(pub_key)
 370
 371             gid_object = api.auth.hierarchy.create_gid(urn, uuid, pkey)
 372             gid = gid_object.save_to_string(save_parents=True)
 373             record.gid = gid
 374
 375         if isinstance (record, RegAuthority):
 376             # update the tree
 377             if not api.auth.hierarchy.auth_exists(hrn):
 378                 api.auth.hierarchy.create_auth(hrn_to_urn(hrn,'authority'))
 379
 380             # get the GID from the newly created authority
 381             auth_info = api.auth.get_auth_info(hrn)
 382             gid = auth_info.get_gid_object()
 383             record.gid=gid.save_to_string(save_parents=True)
 384
 385             # locate objects for relationships
 386             pi_hrns = getattr(record,'pi',None)
 387             if pi_hrns is not None: record.update_pis (pi_hrns, dbsession)
 388
 389         elif isinstance (record, RegSlice):
 390             researcher_hrns = getattr(record,'reg-researchers',None)
 391             if researcher_hrns is not None: record.update_researchers (researcher_hrns, dbsession)
 392
 393         elif isinstance (record, RegUser):
 394             # create RegKey objects for incoming keys
 395             if hasattr(record,'keys'):
 396                 logger.debug ("creating %d keys for user %s"%(len(record.keys),record.hrn))
 397                 record.reg_keys = [ RegKey (key) for key in record.keys ]
 398
 399         # update testbed-specific data if needed
 400         pointer = api.driver.register (record.__dict__, hrn, pub_key)
 401
 402         record.pointer=pointer
 403         dbsession.add(record)
 404         dbsession.commit()
 405
 406         # update membership for researchers, pis, owners, operators
 407         self.update_driver_relations (api, record, record)
 408
 409         return record.get_gid_object().save_to_string(save_parents=True)
 410
 411     def Update(self, api, record_dict):
 412
 413         logger.debug("Update: entering with record_dict=%s"%printable(record_dict))
 414         normalize_input_record (record_dict)
 415         logger.debug("Update: normalized record_dict=%s"%printable(record_dict))
 416
 417         dbsession=api.dbsession()
 418         assert ('type' in record_dict)
 419         new_record=make_record(dict=record_dict)
 420         (type,hrn) = (new_record.type, new_record.hrn)
 421
 422         # make sure the record exists
 423         record = dbsession.query(RegRecord).filter_by(type=type,hrn=hrn).first()
 424         if not record:
 425             raise RecordNotFound("hrn=%s, type=%s"%(hrn,type))
 426         record.just_updated()
 427
 428         # Use the pointer from the existing record, not the one that the user
 429         # gave us. This prevents the user from inserting a forged pointer
 430         pointer = record.pointer
 431
 432         # is there a change in keys ?
 433         new_key=None
 434         if type=='user':
 435             if getattr(new_record,'keys',None):
 436                 new_key=new_record.keys
 437                 if isinstance (new_key,types.ListType):
 438                     new_key=new_key[0]
 439
 440         # take new_key into account
 441         if new_key:
 442             # update the openssl key and gid
 443             pkey = convert_public_key(new_key)
 444             uuid = create_uuid()
 445             urn = hrn_to_urn(hrn,type)
 446             gid_object = api.auth.hierarchy.create_gid(urn, uuid, pkey)
 447             gid = gid_object.save_to_string(save_parents=True)
 448
 449         # xxx should do side effects from new_record to record
 450         # not too sure how to do that
 451         # not too big a deal with planetlab as the driver is authoritative, but...
 452
 453         # update native relations
 454         if isinstance (record, RegSlice):
 455             researcher_hrns = getattr(new_record,'reg-researchers',None)
 456             if researcher_hrns is not None: record.update_researchers (researcher_hrns, dbsession)
 457
 458         elif isinstance (record, RegAuthority):
 459             pi_hrns = getattr(new_record,'pi',None)
 460             if pi_hrns is not None: record.update_pis (pi_hrns, dbsession)
 461
 462         # update the PLC information that was specified with the record
 463         # xxx oddly enough, without this useless statement,
 464         # record.__dict__ as received by the driver seems to be off
 465         # anyway the driver should receive an object
 466         # (and then extract __dict__ itself if needed)
 467         print "DO NOT REMOVE ME before driver.update, record=%s"%record
 468         new_key_pointer = -1
 469         try:
 470            (pointer, new_key_pointer) = api.driver.update (record.__dict__, new_record.__dict__, hrn, new_key)
 471         except:
 472            pass
 473         if new_key and new_key_pointer:
 474             record.reg_keys=[ RegKey (new_key, new_key_pointer)]
 475             record.gid = gid
 476
 477         dbsession.commit()
 478         # update membership for researchers, pis, owners, operators
 479         self.update_driver_relations (api, record, new_record)
 480
 481         return 1
 482
 483     # expecting an Xrn instance
 484     def Remove(self, api, xrn, origin_hrn=None):
 485         dbsession=api.dbsession()
 486         hrn=xrn.get_hrn()
 487         type=xrn.get_type()
 488         request=dbsession.query(RegRecord).filter_by(hrn=hrn)
 489         if type and type not in ['all', '*']:
 490             request=request.filter_by(type=type)
 491
 492         record = request.first()
 493         if not record:
 494             msg="Could not find hrn %s"%hrn
 495             if type: msg += " type=%s"%type
 496             raise RecordNotFound(msg)
 497
 498         type = record.type
 499         if type not in ['slice', 'user', 'node', 'authority'] :
 500             raise UnknownSfaType(type)
 501
 502         credential = api.getCredential()
 503         registries = api.registries
 504
 505         # Try to remove the object from the PLCDB of federated agg.
 506         # This is attempted before removing the object from the local agg's PLCDB and sfa table
 507         if hrn.startswith(api.hrn) and type in ['user', 'slice', 'authority']:
 508             for registry in registries:
 509                 if registry not in [api.hrn]:
 510                     try:
 511                         result=registries[registry].remove_peer_object(credential, record, origin_hrn)
 512                     except:
 513                         pass
 514
 515         # call testbed callback first
 516         # IIUC this is done on the local testbed TOO because of the refreshpeer link
 517         if not api.driver.remove(record.__dict__):
 518             logger.warning("driver.remove failed")
 519
 520         # delete from sfa db
 521         dbsession.delete(record)
 522         dbsession.commit()
 523
 524         return 1
 525
 526     # This is a PLC-specific thing, won't work with other platforms
 527     def get_key_from_incoming_ip (self, api):
 528         dbsession=api.dbsession()
 529         # verify that the callers's ip address exist in the db and is an interface
 530         # for a node in the db
 531         (ip, port) = api.remote_addr
 532         interfaces = api.driver.shell.GetInterfaces({'ip': ip}, ['node_id'])
 533         if not interfaces:
 534             raise NonExistingRecord("no such ip %(ip)s" % locals())
 535         nodes = api.driver.shell.GetNodes([interfaces[0]['node_id']], ['node_id', 'hostname'])
 536         if not nodes:
 537             raise NonExistingRecord("no such node using ip %(ip)s" % locals())
 538         node = nodes[0]
 539
 540         # look up the sfa record
 541         record=dbsession.query(RegRecord).filter_by(type='node',pointer=node['node_id']).first()
 542         if not record:
 543             raise RecordNotFound("node with pointer %s"%node['node_id'])
 544
 545         # generate a new keypair and gid
 546         uuid = create_uuid()
 547         pkey = Keypair(create=True)
 548         urn = hrn_to_urn(record.hrn, record.type)
 549         gid_object = api.auth.hierarchy.create_gid(urn, uuid, pkey)
 550         gid = gid_object.save_to_string(save_parents=True)
 551         record.gid = gid
 552
 553         # update the record
 554         dbsession.commit()
 555
 556         # attempt the scp the key
 557         # and gid onto the node
 558         # this will only work for planetlab based components
 559         (kfd, key_filename) = tempfile.mkstemp()
 560         (gfd, gid_filename) = tempfile.mkstemp()
 561         pkey.save_to_file(key_filename)
 562         gid_object.save_to_file(gid_filename, save_parents=True)
 563         host = node['hostname']
 564         key_dest="/etc/sfa/node.key"
 565         gid_dest="/etc/sfa/node.gid"
 566         scp = "/usr/bin/scp"
 567         #identity = "/etc/planetlab/root_ssh_key.rsa"
 568         identity = "/etc/sfa/root_ssh_key"
 569         scp_options=" -i %(identity)s " % locals()
 570         scp_options+="-o StrictHostKeyChecking=no " % locals()
 571         scp_key_command="%(scp)s %(scp_options)s %(key_filename)s root@%(host)s:%(key_dest)s" %\
 572                          locals()
 573         scp_gid_command="%(scp)s %(scp_options)s %(gid_filename)s root@%(host)s:%(gid_dest)s" %\
 574                          locals()
 575
 576         all_commands = [scp_key_command, scp_gid_command]
 577
 578         for command in all_commands:
 579             (status, output) = commands.getstatusoutput(command)
 580             if status:
 581                 raise Exception, output
 582
 583         for filename in [key_filename, gid_filename]:
 584             os.unlink(filename)
 585
 586         return 1