sfa/senslab/slabslices.py

   1 from types import StringTypes
   2 from collections import defaultdict
   3 import sys
   4 from sfa.util.xrn import get_leaf, get_authority, urn_to_hrn
   5 from sfa.util.plxrn import hrn_to_pl_slicename
   6 from sfa.util.policy import Policy
   7 from sfa.rspecs.rspec import RSpec
   8 from sfa.plc.vlink import VLink
   9 from sfa.util.xrn import Xrn
  10 from sfa.util.sfalogging import logger
  11
  12 MAXINT =  2L**31-1
  13
  14 class SlabSlices:
  15
  16     rspec_to_slice_tag = {'max_rate':'net_max_rate'}
  17
  18     #def __init__(self, api, ttl = .5, origin_hrn=None):
  19         #self.api = api
  20         ##filepath = path + os.sep + filename
  21         #self.policy = Policy(self.api)
  22         #self.origin_hrn = origin_hrn
  23         #self.registry = api.registries[api.hrn]
  24         #self.credential = api.getCredential()
  25         #self.nodes = []
  26         #self.persons = []
  27
  28
  29     def __init__(self, driver):
  30         self.driver = driver
  31     #def get_slivers(self, xrn, node=None):
  32         #hrn, type = urn_to_hrn(xrn)
  33
  34         #slice_name = hrn_to_pl_slicename(hrn)
  35         ## XX Should we just call PLCAPI.GetSliceTicket(slice_name) instead
  36         ## of doing all of this?
  37         ##return self.api.driver.GetSliceTicket(self.auth, slice_name)
  38
  39         ## from PLCAPI.GetSlivers.get_slivers()
  40         #slice_fields = ['slice_id', 'name', 'instantiation', 'expires', 'person_ids', 'slice_tag_ids']
  41         #slices = self.api.driver.GetSlices(slice_name, slice_fields)
  42         ## Build up list of users and slice attributes
  43         #person_ids = set()
  44         #all_slice_tag_ids = set()
  45         #for slice in slices:
  46             #person_ids.update(slice['person_ids'])
  47             #all_slice_tag_ids.update(slice['slice_tag_ids'])
  48         #person_ids = list(person_ids)
  49         #all_slice_tag_ids = list(all_slice_tag_ids)
  50         ## Get user information
  51         #all_persons_list = self.api.driver.GetPersons({'person_id':person_ids,'enabled':True}, ['person_id', 'enabled', 'key_ids'])
  52         #all_persons = {}
  53         #for person in all_persons_list:
  54             #all_persons[person['person_id']] = person
  55
  56         ## Build up list of keys
  57         #key_ids = set()
  58         #for person in all_persons.values():
  59             #key_ids.update(person['key_ids'])
  60         #key_ids = list(key_ids)
  61         ## Get user account keys
  62         #all_keys_list = self.api.driver.GetKeys(key_ids, ['key_id', 'key', 'key_type'])
  63         #all_keys = {}
  64         #for key in all_keys_list:
  65             #all_keys[key['key_id']] = key
  66         ## Get slice attributes
  67         #all_slice_tags_list = self.api.driver.GetSliceTags(all_slice_tag_ids)
  68         #all_slice_tags = {}
  69         #for slice_tag in all_slice_tags_list:
  70             #all_slice_tags[slice_tag['slice_tag_id']] = slice_tag
  71
  72         #slivers = []
  73         #for slice in slices:
  74             #keys = []
  75             #for person_id in slice['person_ids']:
  76                 #if person_id in all_persons:
  77                     #person = all_persons[person_id]
  78                     #if not person['enabled']:
  79                         #continue
  80                     #for key_id in person['key_ids']:
  81                         #if key_id in all_keys:
  82                             #key = all_keys[key_id]
  83                             #keys += [{'key_type': key['key_type'],
  84                                     #'key': key['key']}]
  85             #attributes = []
  86             ## All (per-node and global) attributes for this slice
  87             #slice_tags = []
  88             #for slice_tag_id in slice['slice_tag_ids']:
  89                 #if slice_tag_id in all_slice_tags:
  90                     #slice_tags.append(all_slice_tags[slice_tag_id])
  91             ## Per-node sliver attributes take precedence over global
  92             ## slice attributes, so set them first.
  93             ## Then comes nodegroup slice attributes
  94             ## Followed by global slice attributes
  95             #sliver_attributes = []
  96
  97             #if node is not None:
  98                 #for sliver_attribute in filter(lambda a: a['node_id'] == node['node_id'], slice_tags):
  99                     #sliver_attributes.append(sliver_attribute['tagname'])
 100                     #attributes.append({'tagname': sliver_attribute['tagname'],
 101                                     #'value': sliver_attribute['value']})
 102
 103             ## set nodegroup slice attributes
 104             #for slice_tag in filter(lambda a: a['nodegroup_id'] in node['nodegroup_ids'], slice_tags):
 105                 ## Do not set any nodegroup slice attributes for
 106                 ## which there is at least one sliver attribute
 107                 ## already set.
 108                 #if slice_tag not in slice_tags:
 109                     #attributes.append({'tagname': slice_tag['tagname'],
 110                         #'value': slice_tag['value']})
 111
 112             #for slice_tag in filter(lambda a: a['node_id'] is None, slice_tags):
 113                 ## Do not set any global slice attributes for
 114                 ## which there is at least one sliver attribute
 115                 ## already set.
 116                 #if slice_tag['tagname'] not in sliver_attributes:
 117                     #attributes.append({'tagname': slice_tag['tagname'],
 118                                    #'value': slice_tag['value']})
 119
 120             ## XXX Sanity check; though technically this should be a system invariant
 121             ## checked with an assertion
 122             #if slice['expires'] > MAXINT:  slice['expires']= MAXINT
 123
 124             #slivers.append({
 125                 #'hrn': hrn,
 126                 #'name': slice['name'],
 127                 #'slice_id': slice['slice_id'],
 128                 #'instantiation': slice['instantiation'],
 129                 #'expires': slice['expires'],
 130                 #'keys': keys,
 131                 #'attributes': attributes
 132             #})
 133
 134         #return slivers
 135
 136     def get_peer(self, xrn):
 137         hrn, type = urn_to_hrn(xrn)
 138         # Becaues of myplc federation,  we first need to determine if this
 139         # slice belongs to out local plc or a myplc peer. We will assume it
 140         # is a local site, unless we find out otherwise
 141         peer = None
 142         print>>sys.stderr, " \r\n \r\n \t slices.py get_peer slice_authority  "
 143         # get this slice's authority (site)
 144         slice_authority = get_authority(hrn)
 145
 146         # get this site's authority (sfa root authority or sub authority)
 147         site_authority = get_authority(slice_authority).lower()
 148
 149         # check if we are already peered with this site_authority, if so
 150         peers = self.driver.GetPeers({'hrn':site_authority})
 151         print>>sys.stderr, " \r\n \r\n \t slices.py get_peer slice_authority  %s site_authority %s" %(slice_authority,site_authority)
 152         for peer_record in peers:
 153             names = [name.lower() for name in peer_record.values() if isinstance(name, StringTypes)]
 154             if site_authority in names:
 155                 peer = peer_record
 156         print>>sys.stderr, " \r\n \r\n \t slices.py get_peer peer  %s " %(peer)
 157         return peer
 158
 159     def get_sfa_peer(self, xrn):
 160         hrn, type = urn_to_hrn(xrn)
 161
 162         # return the authority for this hrn or None if we are the authority
 163         sfa_peer = None
 164         slice_authority = get_authority(hrn)
 165         site_authority = get_authority(slice_authority)
 166
 167         if site_authority != self.driver.hrn:
 168             sfa_peer = site_authority
 169
 170         return sfa_peer
 171
 172     def verify_slice_nodes(self, slice, requested_slivers, peer):
 173         current_slivers = []
 174         deleted_nodes = []
 175         if slice['node_ids']:
 176             nodes = self.driver.GetNodes(slice['node_ids'], ['hostname'])
 177             current_slivers = [node['hostname'] for node in nodes]
 178
 179             # remove nodes not in rspec
 180             deleted_nodes = list(set(current_slivers).difference(requested_slivers))
 181
 182         # add nodes from rspec
 183         added_nodes = list(set(requested_slivers).difference(current_slivers))
 184         print>>sys.stderr , "\r\n \r\n \t slices.py  verify_slice_nodes added_nodes %s slice %s" %( added_nodes,slice)
 185         try:
 186             #if peer:
 187                 #self.driver.UnBindObjectFromPeer('slice', slice['slice_id'], peer['shortname'])
 188             #PI is a list, get the only username in this list
 189             #so that the OAR/LDAP knows the user: remove the authority from the name
 190             tmp=  slice['PI'][0].split(".")
 191             username = tmp[(len(tmp)-1)]
 192             self.driver.AddSliceToNodes(slice['name'], added_nodes, username)
 193
 194             if deleted_nodes:
 195                 self.driver.DeleteSliceFromNodes(slice['name'], deleted_nodes)
 196
 197         except:
 198             logger.log_exc('Failed to add/remove slice from nodes')
 199
 200     def free_egre_key(self):
 201         used = set()
 202         for tag in self.driver.GetSliceTags({'tagname': 'egre_key'}):
 203                 used.add(int(tag['value']))
 204
 205         for i in range(1, 256):
 206             if i not in used:
 207                 key = i
 208                 break
 209         else:
 210             raise KeyError("No more EGRE keys available")
 211
 212         return str(key)
 213
 214
 215
 216
 217
 218
 219     def handle_peer(self, site, slice, persons, peer):
 220         if peer:
 221             # bind site
 222             try:
 223                 if site:
 224                     self.driver.BindObjectToPeer('site', site['site_id'], peer['shortname'], slice['site_id'])
 225             except Exception,e:
 226                 self.driver.DeleteSite(site['site_id'])
 227                 raise e
 228
 229             # bind slice
 230             try:
 231                 if slice:
 232                     self.driver.BindObjectToPeer('slice', slice['slice_id'], peer['shortname'], slice['slice_id'])
 233             except Exception,e:
 234                 self.driver.DeleteSlice(slice['slice_id'])
 235                 raise e
 236
 237             # bind persons
 238             for person in persons:
 239                 try:
 240                     self.driver.BindObjectToPeer('person',
 241                                                      person['person_id'], peer['shortname'], person['peer_person_id'])
 242
 243                     for (key, remote_key_id) in zip(person['keys'], person['key_ids']):
 244                         try:
 245                             self.driver.BindObjectToPeer( 'key', key['key_id'], peer['shortname'], remote_key_id)
 246                         except:
 247                             self.driver.DeleteKey(key['key_id'])
 248                             logger("failed to bind key: %s to peer: %s " % (key['key_id'], peer['shortname']))
 249                 except Exception,e:
 250                     self.driver.DeletePerson(person['person_id'])
 251                     raise e
 252
 253         return slice
 254
 255     #def verify_site(self, slice_xrn, slice_record={}, peer=None, sfa_peer=None, options={}):
 256         #(slice_hrn, type) = urn_to_hrn(slice_xrn)
 257         #site_hrn = get_authority(slice_hrn)
 258         ## login base can't be longer than 20 characters
 259         ##slicename = hrn_to_pl_slicename(slice_hrn)
 260         #authority_name = slice_hrn.split('.')[0]
 261         #login_base = authority_name[:20]
 262         #print >>sys.stderr, " \r\n \r\n \t\t SLABSLICES.PY verify_site authority_name %s  login_base %s slice_hrn %s" %(authority_name,login_base,slice_hrn)
 263
 264         #sites = self.driver.GetSites(login_base)
 265         #if not sites:
 266             ## create new site record
 267             #site = {'name': 'geni.%s' % authority_name,
 268                     #'abbreviated_name': authority_name,
 269                     #'login_base': login_base,
 270                     #'max_slices': 100,
 271                     #'max_slivers': 1000,
 272                     #'enabled': True,
 273                     #'peer_site_id': None}
 274             #if peer:
 275                 #site['peer_site_id'] = slice_record.get('site_id', None)
 276             #site['site_id'] = self.driver.AddSite(site)
 277             ## exempt federated sites from monitor policies
 278             #self.driver.AddSiteTag(site['site_id'], 'exempt_site_until', "20200101")
 279
 280             ### is this still necessary?
 281             ### add record to the local registry
 282             ##if sfa_peer and slice_record:
 283                 ##peer_dict = {'type': 'authority', 'hrn': site_hrn, \
 284                              ##'peer_authority': sfa_peer, 'pointer': site['site_id']}
 285                 ##self.registry.register_peer_object(self.credential, peer_dict)
 286         #else:
 287             #site =  sites[0]
 288             #if peer:
 289                 ## unbind from peer so we can modify if necessary. Will bind back later
 290                 #self.driver.UnBindObjectFromPeer('site', site['site_id'], peer['shortname'])
 291
 292         #return site
 293
 294     def verify_slice(self, slice_hrn, slice_record, peer, sfa_peer, options={} ):
 295         #slicename = hrn_to_pl_slicename(slice_hrn)
 296         #parts = hrn_to_pl_slicename(slice_hrn).split("_")
 297         login_base = slice_hrn.split(".")[0]
 298         slicename = slice_hrn
 299         slices = self.driver.GetSlices([slicename])
 300         print>>sys.stderr, " \r\n \r\rn Slices.py verify_slice slicename %s slices %s slice_record %s"%(slicename ,slices, slice_record)
 301         if not slices:
 302             slice = {'name': slicename,
 303                      'url': slice_record.get('url', slice_hrn),
 304                      #'description': slice_record.get('description', slice_hrn)
 305                      }
 306             # add the slice
 307             slice['slice_id'] = self.driver.AddSlice(slice)
 308             slice['node_ids'] = []
 309             slice['person_ids'] = []
 310             #if peer:
 311                 #slice['peer_slice_id'] = slice_record.get('slice_id', None)
 312             # mark this slice as an sfa peer record
 313             #if sfa_peer:
 314                 #peer_dict = {'type': 'slice', 'hrn': slice_hrn,
 315                              #'peer_authority': sfa_peer, 'pointer': slice['slice_id']}
 316                 #self.registry.register_peer_object(self.credential, peer_dict)
 317         else:
 318             slice = slices[0]
 319             slice.update(slice_record)
 320             #del slice['last_updated']
 321             #del slice['date_created']
 322             #if peer:
 323                 #slice['peer_slice_id'] = slice_record.get('slice_id', None)
 324                 ## unbind from peer so we can modify if necessary. Will bind back later
 325                 #self.driver.UnBindObjectFromPeer('slice', slice['slice_id'], peer['shortname'])
 326                 #Update existing record (e.g. expires field) it with the latest info.
 327             ##if slice_record and slice['expires'] != slice_record['expires']:
 328                 ##self.driver.UpdateSlice( slice['slice_id'], {'expires' : slice_record['expires']})
 329
 330         return slice
 331
 332     #def get_existing_persons(self, users):
 333     def verify_persons(self, slice_hrn, slice_record, users,  peer, sfa_peer, options={}):
 334         users_by_id = {}
 335         users_by_hrn = {}
 336         users_dict = {}
 337
 338         for user in users:
 339             if 'person_id' in user and 'hrn' in user:
 340                 users_by_id[user['person_id']] = user
 341                 users_dict[user['person_id']] = {'person_id':user['person_id'], 'hrn':user['hrn']}
 342
 343                 users_by_hrn[user['hrn']] = user
 344                 users_dict[user['hrn']] = {'person_id':user['person_id'], 'hrn':user['hrn']}
 345
 346         #print>>sys.stderr, " \r\n \r\n \t slabslices.py verify_person  users_dict %s \r\n user_by_hrn %s \r\n \tusers_by_id %s " %( users_dict,users_by_hrn, users_by_id)
 347
 348         existing_user_ids = []
 349         existing_user_hrns = []
 350         existing_users= []
 351         #Check if user is in LDAP using its hrn.
 352         #Assuming Senslab is centralised :  one LDAP for all sites, user_id unknown from LDAP
 353         # LDAP does not provide users id, therfore we rely on hrns
 354         if users_by_hrn:
 355             existing_users = self.driver.GetPersons({'hrn': users_by_hrn.keys()},
 356                                                         ['hrn','pkey'])
 357             if existing_users:
 358                 for user in existing_users :
 359                     #for  k in users_dict[user['hrn']] :
 360                     existing_user_hrns.append (users_dict[user['hrn']]['hrn'])
 361                     existing_user_ids.append (users_dict[user['hrn']]['person_id'])
 362                     #print>>sys.stderr, " \r\n \r\n \t slabslices.py verify_person  existing_user_ids.append (users_dict[user['hrn']][k]) %s \r\n existing_users %s " %(  existing_user_ids,existing_users)
 363
 364
 365         # requested slice users
 366         requested_user_ids = users_by_id.keys()
 367         requested_user_hrns = users_by_hrn.keys()
 368         #print>>sys.stderr, " \r\n \r\n \t slabslices.py verify_person  requested_user_ids  %s user_by_hrn %s " %( requested_user_ids,users_by_hrn)
 369         # existing slice users
 370         existing_slice_users_filter = {'hrn': slice_record.get('PI', [])}
 371         #print>>sys.stderr, " \r\n \r\n slices.py verify_person requested_user_ids %s existing_slice_users_filter %s slice_record %s" %(requested_user_ids,existing_slice_users_filter,slice_record)
 372
 373         existing_slice_users = self.driver.GetPersons(existing_slice_users_filter,['hrn','pkey'])
 374         #print>>sys.stderr, " \r\n \r\n slices.py verify_person   existing_slice_users %s " %(existing_slice_users)
 375
 376         existing_slice_user_hrns = [user['hrn'] for user in existing_slice_users]
 377
 378         #print>>sys.stderr, " \r\n \r\n slices.py verify_person requested_user_ids %s  existing_slice_user_hrns %s " %(requested_user_ids,existing_slice_user_hrns)
 379         # users to be added, removed or updated
 380
 381         added_user_hrns = set(requested_user_hrns).difference(set(existing_user_hrns))
 382
 383         added_slice_user_hrns = set(requested_user_hrns).difference(existing_slice_user_hrns)
 384
 385         removed_user_hrns = set(existing_slice_user_hrns).difference(requested_user_hrns)
 386
 387
 388         updated_user_hrns = set(existing_slice_user_hrns).intersection(requested_user_hrns)
 389         #print>>sys.stderr, " \r\n \r\n slices.py verify_persons  added_user_ids %s added_slice_user_ids %s " %(added_user_ids,added_slice_user_ids)
 390         #print>>sys.stderr, " \r\n \r\n slices.py verify_persons  removed_user_hrns %s updated_user_hrns %s " %(removed_user_hrns,updated_user_hrns)
 391         # Remove stale users (only if we are not appending)
 392         append = options.get('append', True)
 393         if append == False:
 394             for removed_user_hrn in removed_user_hrns:
 395                 self.driver.DeletePersonFromSlice(removed_user_hrn, slice_record['name'])
 396         # update_existing users
 397         updated_users_list = [user for user in existing_slice_users if user['hrn'] in \
 398           updated_user_hrns]
 399         print>>sys.stderr, " \r\n \r\n slices.py verify_persons  removed_user_hrns %s updated_users_list %s " %(removed_user_hrns,updated_users_list)
 400         #self.verify_keys(existing_slice_users, updated_users_list, peer, append)
 401
 402         added_persons = []
 403         # add new users
 404         for added_user_hrn in added_user_hrns:
 405             added_user = users_dict[added_user_hrn]
 406             #hrn, type = urn_to_hrn(added_user['urn'])
 407             person = {
 408                 #'first_name': added_user.get('first_name', hrn),
 409                 #'last_name': added_user.get('last_name', hrn),
 410                 'person_id': added_user['person_id'],
 411                 #'peer_person_id': None,
 412                 #'keys': [],
 413                 #'key_ids': added_user.get('key_ids', []),
 414
 415             }
 416             #print>>sys.stderr, " \r\n \r\n slices.py verify_persons   added_user_ids %s " %(added_user_ids)
 417             person['person_id'] = self.driver.AddPerson(person)
 418             if peer:
 419                 person['peer_person_id'] = added_user['person_id']
 420             added_persons.append(person)
 421
 422             # enable the account
 423             self.driver.UpdatePerson(person['person_id'], {'enabled': True})
 424
 425             # add person to site
 426             #self.driver.AddPersonToSite(added_user_id, login_base)
 427
 428             #for key_string in added_user.get('keys', []):
 429                 #key = {'key':key_string, 'key_type':'ssh'}
 430                 #key['key_id'] = self.driver.AddPersonKey(person['person_id'], key)
 431                 #person['keys'].append(key)
 432
 433             # add the registry record
 434             #if sfa_peer:
 435                 #peer_dict = {'type': 'user', 'hrn': hrn, 'peer_authority': sfa_peer, \
 436                     #'pointer': person['person_id']}
 437                 #self.registry.register_peer_object(self.credential, peer_dict)
 438         for added_slice_user_hrn in added_slice_user_hrns.union(added_user_hrns):
 439             self.driver.AddPersonToSlice(added_slice_user_hrn, slice_record['name'])
 440         #for added_slice_user_id in added_slice_user_ids.union(added_user_ids):
 441             # add person to the slice
 442             #self.driver.AddPersonToSlice(added_slice_user_id, slice_record['name'])
 443             # if this is a peer record then it should already be bound to a peer.
 444             # no need to return worry about it getting bound later
 445
 446         return added_persons
 447
 448
 449     def verify_keys(self, persons, users, peer, options={}):
 450         # existing keys
 451         key_ids = []
 452         for person in persons:
 453             key_ids.extend(person['key_ids'])
 454         keylist = self.driver.GetKeys(key_ids, ['key_id', 'key'])
 455         keydict = {}
 456         for key in keylist:
 457             keydict[key['key']] = key['key_id']
 458         existing_keys = keydict.keys()
 459         persondict = {}
 460         for person in persons:
 461             persondict[person['email']] = person
 462
 463         # add new keys
 464         requested_keys = []
 465         updated_persons = []
 466         for user in users:
 467             user_keys = user.get('keys', [])
 468             updated_persons.append(user)
 469             for key_string in user_keys:
 470                 requested_keys.append(key_string)
 471                 if key_string not in existing_keys:
 472                     key = {'key': key_string, 'key_type': 'ssh'}
 473                     try:
 474                         if peer:
 475                             person = persondict[user['email']]
 476                             self.driver.UnBindObjectFromPeer('person', person['person_id'], peer['shortname'])
 477                         key['key_id'] = self.driver.AddPersonKey(user['email'], key)
 478                         if peer:
 479                             key_index = user_keys.index(key['key'])
 480                             remote_key_id = user['key_ids'][key_index]
 481                             self.driver.BindObjectToPeer('key', key['key_id'], peer['shortname'], remote_key_id)
 482
 483                     finally:
 484                         if peer:
 485                             self.driver.BindObjectToPeer('person', person['person_id'], peer['shortname'], user['person_id'])
 486
 487         # remove old keys (only if we are not appending)
 488         if append == False:
 489             removed_keys = set(existing_keys).difference(requested_keys)
 490             for existing_key_id in keydict:
 491                 if keydict[existing_key_id] in removed_keys:
 492                     try:
 493                         if peer:
 494                             self.driver.UnBindObjectFromPeer('key', existing_key_id, peer['shortname'])
 495                         self.driver.DeleteKey(existing_key_id)
 496                     except:
 497                         pass
 498
 499     #def verify_slice_attributes(self, slice, requested_slice_attributes, append=False, admin=False):
 500         ## get list of attributes users ar able to manage
 501         #filter = {'category': '*slice*'}
 502         #if not admin:
 503             #filter['|roles'] = ['user']
 504         #slice_attributes = self.driver.GetTagTypes(filter)
 505         #valid_slice_attribute_names = [attribute['tagname'] for attribute in slice_attributes]
 506
 507         ## get sliver attributes
 508         #added_slice_attributes = []
 509         #removed_slice_attributes = []
 510         #ignored_slice_attribute_names = []
 511         #existing_slice_attributes = self.driver.GetSliceTags({'slice_id': slice['slice_id']})
 512
 513         ## get attributes that should be removed
 514         #for slice_tag in existing_slice_attributes:
 515             #if slice_tag['tagname'] in ignored_slice_attribute_names:
 516                 ## If a slice already has a admin only role it was probably given to them by an
 517                 ## admin, so we should ignore it.
 518                 #ignored_slice_attribute_names.append(slice_tag['tagname'])
 519             #else:
 520                 ## If an existing slice attribute was not found in the request it should
 521                 ## be removed
 522                 #attribute_found=False
 523                 #for requested_attribute in requested_slice_attributes:
 524                     #if requested_attribute['name'] == slice_tag['tagname'] and \
 525                        #requested_attribute['value'] == slice_tag['value']:
 526                         #attribute_found=True
 527                         #break
 528
 529             #if not attribute_found and not append:
 530                 #removed_slice_attributes.append(slice_tag)
 531
 532         ## get attributes that should be added:
 533         #for requested_attribute in requested_slice_attributes:
 534             ## if the requested attribute wasn't found  we should add it
 535             #if requested_attribute['name'] in valid_slice_attribute_names:
 536                 #attribute_found = False
 537                 #for existing_attribute in existing_slice_attributes:
 538                     #if requested_attribute['name'] == existing_attribute['tagname'] and \
 539                        #requested_attribute['value'] == existing_attribute['value']:
 540                         #attribute_found=True
 541                         #break
 542                 #if not attribute_found:
 543                     #added_slice_attributes.append(requested_attribute)
 544
 545
 546         ## remove stale attributes
 547         #for attribute in removed_slice_attributes:
 548             #try:
 549                 #self.driver.DeleteSliceTag(attribute['slice_tag_id'])
 550             #except Exception, e:
 551                 #self.logger.warn('Failed to remove sliver attribute. name: %s, value: %s, node_id: %s\nCause:%s'\
 552                                 #% (name, value,  node_id, str(e)))
 553
 554         ## add requested_attributes
 555         #for attribute in added_slice_attributes:
 556             #try:
 557                 #self.driver.AddSliceTag(slice['name'], attribute['name'], attribute['value'], attribute.get('node_id', None))
 558             #except Exception, e:
 559                 #self.logger.warn('Failed to add sliver attribute. name: %s, value: %s, node_id: %s\nCause:%s'\
 560                                 #% (name, value,  node_id, str(e)))
 561
 562     #def create_slice_aggregate(self, xrn, rspec):
 563         #hrn, type = urn_to_hrn(xrn)
 564         ## Determine if this is a peer slice
 565         #peer = self.get_peer(hrn)
 566         #sfa_peer = self.get_sfa_peer(hrn)
 567
 568         #spec = RSpec(rspec)
 569         ## Get the slice record from sfa
 570         #slicename = hrn_to_pl_slicename(hrn)
 571         #slice = {}
 572         #slice_record = None
 573         #registry = self.api.registries[self.api.hrn]
 574         #credential = self.api.getCredential()
 575
 576         #site_id, remote_site_id = self.verify_site(registry, credential, hrn, peer, sfa_peer)
 577         #slice = self.verify_slice(registry, credential, hrn, site_id, remote_site_id, peer, sfa_peer)
 578
 579         ## find out where this slice is currently running
 580         #nodelist = self.driver.GetNodes(slice['node_ids'], ['hostname'])
 581         #hostnames = [node['hostname'] for node in nodelist]
 582
 583         ## get netspec details
 584         #nodespecs = spec.getDictsByTagName('NodeSpec')
 585
 586         ## dict in which to store slice attributes to set for the nodes
 587         #nodes = {}
 588         #for nodespec in nodespecs:
 589             #if isinstance(nodespec['name'], list):
 590                 #for nodename in nodespec['name']:
 591                     #nodes[nodename] = {}
 592                     #for k in nodespec.keys():
 593                         #rspec_attribute_value = nodespec[k]
 594                         #if (self.rspec_to_slice_tag.has_key(k)):
 595                             #slice_tag_name = self.rspec_to_slice_tag[k]
 596                             #nodes[nodename][slice_tag_name] = rspec_attribute_value
 597             #elif isinstance(nodespec['name'], StringTypes):
 598                 #nodename = nodespec['name']
 599                 #nodes[nodename] = {}
 600                 #for k in nodespec.keys():
 601                     #rspec_attribute_value = nodespec[k]
 602                     #if (self.rspec_to_slice_tag.has_key(k)):
 603                         #slice_tag_name = self.rspec_to_slice_tag[k]
 604                         #nodes[nodename][slice_tag_name] = rspec_attribute_value
 605
 606                 #for k in nodespec.keys():
 607                     #rspec_attribute_value = nodespec[k]
 608                     #if (self.rspec_to_slice_tag.has_key(k)):
 609                         #slice_tag_name = self.rspec_to_slice_tag[k]
 610                         #nodes[nodename][slice_tag_name] = rspec_attribute_value
 611
 612         #node_names = nodes.keys()
 613         ## remove nodes not in rspec
 614         #deleted_nodes = list(set(hostnames).difference(node_names))
 615         ## add nodes from rspec
 616         #added_nodes = list(set(node_names).difference(hostnames))
 617
 618         #try:
 619             #if peer:
 620                 #self.driver.UnBindObjectFromPeer('slice', slice['slice_id'], peer)
 621
 622             #self.driver.AddSliceToNodes(slicename, added_nodes)
 623
 624             ## Add recognized slice tags
 625             #for node_name in node_names:
 626                 #node = nodes[node_name]
 627                 #for slice_tag in node.keys():
 628                     #value = node[slice_tag]
 629                     #if (isinstance(value, list)):
 630                         #value = value[0]
 631
 632                     #self.driver.AddSliceTag(slicename, slice_tag, value, node_name)
 633
 634             #self.driver.DeleteSliceFromNodes(slicename, deleted_nodes)
 635         #finally:
 636             #if peer:
 637                 #self.driver.BindObjectToPeer('slice', slice['slice_id'], peer, slice['peer_slice_id'])
 638
 639         #return 1
 640