sfa/plc/slices.py

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