sfa/planetlab/plslices.py

   1 from types import StringTypes
   2 from collections import defaultdict
   3
   4 from sfa.util.sfatime import utcparse, datetime_to_epoch
   5 from sfa.util.sfalogging import logger
   6 from sfa.util.xrn import Xrn, get_leaf, get_authority, urn_to_hrn
   7 from sfa.rspecs.rspec import RSpec
   8 from sfa.planetlab.vlink import VLink
   9 from sfa.planetlab.topology import Topology
  10 from sfa.planetlab.plxrn import PlXrn, hrn_to_pl_slicename
  11 from sfa.storage.model import SliverAllocation
  12 from sfa.storage.alchemy import dbsession
  13
  14 MAXINT =  2L**31-1
  15
  16 class PlSlices:
  17
  18     rspec_to_slice_tag = {'max_rate':'net_max_rate'}
  19
  20     def __init__(self, driver):
  21         self.driver = driver
  22
  23     def get_slivers(self, xrn, node=None):
  24         hrn, type = urn_to_hrn(xrn)
  25
  26         slice_name = hrn_to_pl_slicename(hrn)
  27         # XX Should we just call PLCAPI.GetSliceTicket(slice_name) instead
  28         # of doing all of this?
  29         #return self.driver.shell.GetSliceTicket(self.auth, slice_name)
  30
  31         # from PLCAPI.GetSlivers.get_slivers()
  32         slice_fields = ['slice_id', 'name', 'instantiation', 'expires', 'person_ids', 'slice_tag_ids']
  33         slices = self.driver.shell.GetSlices(slice_name, slice_fields)
  34         # Build up list of users and slice attributes
  35         person_ids = set()
  36         all_slice_tag_ids = set()
  37         for slice in slices:
  38             person_ids.update(slice['person_ids'])
  39             all_slice_tag_ids.update(slice['slice_tag_ids'])
  40         person_ids = list(person_ids)
  41         all_slice_tag_ids = list(all_slice_tag_ids)
  42         # Get user information
  43         all_persons_list = self.driver.shell.GetPersons({'person_id':person_ids,'enabled':True}, ['person_id', 'enabled', 'key_ids'])
  44         all_persons = {}
  45         for person in all_persons_list:
  46             all_persons[person['person_id']] = person
  47
  48         # Build up list of keys
  49         key_ids = set()
  50         for person in all_persons.values():
  51             key_ids.update(person['key_ids'])
  52         key_ids = list(key_ids)
  53         # Get user account keys
  54         all_keys_list = self.driver.shell.GetKeys(key_ids, ['key_id', 'key', 'key_type'])
  55         all_keys = {}
  56         for key in all_keys_list:
  57             all_keys[key['key_id']] = key
  58         # Get slice attributes
  59         all_slice_tags_list = self.driver.shell.GetSliceTags(all_slice_tag_ids)
  60         all_slice_tags = {}
  61         for slice_tag in all_slice_tags_list:
  62             all_slice_tags[slice_tag['slice_tag_id']] = slice_tag
  63
  64         slivers = []
  65         for slice in slices:
  66             keys = []
  67             for person_id in slice['person_ids']:
  68                 if person_id in all_persons:
  69                     person = all_persons[person_id]
  70                     if not person['enabled']:
  71                         continue
  72                     for key_id in person['key_ids']:
  73                         if key_id in all_keys:
  74                             key = all_keys[key_id]
  75                             keys += [{'key_type': key['key_type'],
  76                                     'key': key['key']}]
  77             attributes = []
  78             # All (per-node and global) attributes for this slice
  79             slice_tags = []
  80             for slice_tag_id in slice['slice_tag_ids']:
  81                 if slice_tag_id in all_slice_tags:
  82                     slice_tags.append(all_slice_tags[slice_tag_id])
  83             # Per-node sliver attributes take precedence over global
  84             # slice attributes, so set them first.
  85             # Then comes nodegroup slice attributes
  86             # Followed by global slice attributes
  87             sliver_attributes = []
  88
  89             if node is not None:
  90                 for sliver_attribute in filter(lambda a: a['node_id'] == node['node_id'], slice_tags):
  91                     sliver_attributes.append(sliver_attribute['tagname'])
  92                     attributes.append({'tagname': sliver_attribute['tagname'],
  93                                     'value': sliver_attribute['value']})
  94
  95             # set nodegroup slice attributes
  96             for slice_tag in filter(lambda a: a['nodegroup_id'] in node['nodegroup_ids'], slice_tags):
  97                 # Do not set any nodegroup slice attributes for
  98                 # which there is at least one sliver attribute
  99                 # already set.
 100                 if slice_tag not in slice_tags:
 101                     attributes.append({'tagname': slice_tag['tagname'],
 102                         'value': slice_tag['value']})
 103
 104             for slice_tag in filter(lambda a: a['node_id'] is None, slice_tags):
 105                 # Do not set any global slice attributes for
 106                 # which there is at least one sliver attribute
 107                 # already set.
 108                 if slice_tag['tagname'] not in sliver_attributes:
 109                     attributes.append({'tagname': slice_tag['tagname'],
 110                                    'value': slice_tag['value']})
 111
 112             # XXX Sanity check; though technically this should be a system invariant
 113             # checked with an assertion
 114             if slice['expires'] > MAXINT:  slice['expires']= MAXINT
 115
 116             slivers.append({
 117                 'hrn': hrn,
 118                 'name': slice['name'],
 119                 'slice_id': slice['slice_id'],
 120                 'instantiation': slice['instantiation'],
 121                 'expires': slice['expires'],
 122                 'keys': keys,
 123                 'attributes': attributes
 124             })
 125
 126         return slivers
 127
 128     def get_peer(self, xrn):
 129         hrn, type = urn_to_hrn(xrn)
 130         # Becaues of myplc federation,  we first need to determine if this
 131         # slice belongs to out local plc or a myplc peer. We will assume it
 132         # is a local site, unless we find out otherwise
 133         peer = None
 134
 135         # get this slice's authority (site)
 136         slice_authority = get_authority(hrn)
 137
 138         # get this site's authority (sfa root authority or sub authority)
 139         site_authority = get_authority(slice_authority).lower()
 140
 141         # check if we are already peered with this site_authority, if so
 142         peers = self.driver.shell.GetPeers({}, ['peer_id', 'peername', 'shortname', 'hrn_root'])
 143         for peer_record in peers:
 144             names = [name.lower() for name in peer_record.values() if isinstance(name, StringTypes)]
 145             if site_authority in names:
 146                 peer = peer_record
 147
 148         return peer
 149
 150     def get_sfa_peer(self, xrn):
 151         hrn, type = urn_to_hrn(xrn)
 152
 153         # return the authority for this hrn or None if we are the authority
 154         sfa_peer = None
 155         slice_authority = get_authority(hrn)
 156         site_authority = get_authority(slice_authority)
 157
 158         if site_authority != self.driver.hrn:
 159             sfa_peer = site_authority
 160
 161         return sfa_peer
 162
 163     def verify_slice_leases(self, slice, requested_leases, kept_leases, peer):
 164
 165         leases = self.driver.shell.GetLeases({'name':slice['name']}, ['lease_id'])
 166         grain = self.driver.shell.GetLeaseGranularity()
 167         current_leases = [lease['lease_id'] for lease in leases]
 168         deleted_leases = list(set(current_leases).difference(kept_leases))
 169
 170         try:
 171             if peer:
 172                 self.driver.shell.UnBindObjectFromPeer('slice', slice['slice_id'], peer['shortname'])
 173             deleted=self.driver.shell.DeleteLeases(deleted_leases)
 174             for lease in requested_leases:
 175                 added=self.driver.shell.AddLeases(lease['hostname'], slice['name'], int(lease['start_time']), int(lease['duration']) * grain + int(lease['start_time']))
 176
 177         except:
 178             logger.log_exc('Failed to add/remove slice leases')
 179
 180         return leases
 181
 182
 183     def verify_slice_nodes(self, slice, rspec_nodes, peer):
 184
 185         slivers = {}
 186         for node in rspec_nodes:
 187             hostname = None
 188             client_id = node.get('client_id')
 189             if node.get('component_name'):
 190                 hostname = node.get('component_name').strip()
 191             elif node.get('component_id'):
 192                 hostname = xrn_to_hostname(node.get('component_id').strip())
 193             if hostname:
 194                 slivers[hostname] = client_id
 195
 196         nodes = self.driver.shell.GetNodes(slice['node_ids'], ['node_id', 'hostname', 'interface_ids'])
 197         current_slivers = [node['hostname'] for node in nodes]
 198
 199         # remove nodes not in rspec
 200         deleted_nodes = list(set(current_slivers).difference(slivers.keys()))
 201
 202         # add nodes from rspec
 203         added_nodes = list(set(slivers.keys()).difference(current_slivers))
 204
 205         try:
 206             if peer:
 207                 self.driver.shell.UnBindObjectFromPeer('slice', slice['slice_id'], peer['shortname'])
 208             self.driver.shell.AddSliceToNodes(slice['name'], added_nodes)
 209             self.driver.shell.DeleteSliceFromNodes(slice['name'], deleted_nodes)
 210
 211         except:
 212             logger.log_exc('Failed to add/remove slice from nodes')
 213
 214         slices = self.driver.shell.GetSlices(slice['name'], ['node_ids'])
 215         resulting_nodes = self.driver.shell.GetNodes(slices[0]['node_ids'])
 216
 217         # update sliver allocations
 218         for node in resulting_nodes:
 219             client_id = slivers[node['hostname']]
 220             sliver_hrn = '%s.%s-%s' % (self.driver.hrn, slice['slice_id'], node['node_id'])
 221             sliver_id = Xrn(sliver_hrn, type='sliver').urn
 222             record = SliverAllocation(sliver_id=sliver_id, client_id=client_id, allocation_state='geni_allocated')
 223             record.sync()
 224         return resulting_nodes
 225
 226     def free_egre_key(self):
 227         used = set()
 228         for tag in self.driver.shell.GetSliceTags({'tagname': 'egre_key'}):
 229                 used.add(int(tag['value']))
 230
 231         for i in range(1, 256):
 232             if i not in used:
 233                 key = i
 234                 break
 235         else:
 236             raise KeyError("No more EGRE keys available")
 237
 238         return str(key)
 239
 240     def verify_slice_links(self, slice, requested_links, nodes):
 241
 242         if not requested_links:
 243             return
 244
 245         # exit if links are not supported here
 246         topology = Topology()
 247         if not topology:
 248             return
 249
 250         # build dict of nodes
 251         nodes_dict = {}
 252         interface_ids = []
 253         for node in nodes:
 254             nodes_dict[node['node_id']] = node
 255             interface_ids.extend(node['interface_ids'])
 256         # build dict of interfaces
 257         interfaces = self.driver.shell.GetInterfaces(interface_ids)
 258         interfaces_dict = {}
 259         for interface in interfaces:
 260             interfaces_dict[interface['interface_id']] = interface
 261
 262         slice_tags = []
 263
 264         # set egre key
 265         slice_tags.append({'name': 'egre_key', 'value': self.free_egre_key()})
 266
 267         # set netns
 268         slice_tags.append({'name': 'netns', 'value': '1'})
 269
 270         # set cap_net_admin
 271         # need to update the attribute string?
 272         slice_tags.append({'name': 'capabilities', 'value': 'CAP_NET_ADMIN'})
 273
 274         for link in requested_links:
 275             # get the ip address of the first node in the link
 276             ifname1 = Xrn(link['interface1']['component_id']).get_leaf()
 277             ifname_parts = ifname1.split(':')
 278             node_raw = ifname_parts[0]
 279             device = None
 280             if len(ifname_parts) > 1:
 281                 device = ifname_parts[1]
 282             node_id = int(node_raw.replace('node', ''))
 283             node = nodes_dict[node_id]
 284             if1 = interfaces_dict[node['interface_ids'][0]]
 285             ipaddr = if1['ip']
 286             topo_rspec = VLink.get_topo_rspec(link, ipaddr)
 287             # set topo_rspec tag
 288             slice_tags.append({'name': 'topo_rspec', 'value': str([topo_rspec]), 'node_id': node_id})
 289             # set vini_topo tag
 290             slice_tags.append({'name': 'vini_topo', 'value': 'manual', 'node_id': node_id})
 291             #self.driver.shell.AddSliceTag(slice['name'], 'topo_rspec', str([topo_rspec]), node_id)
 292
 293         self.verify_slice_attributes(slice, slice_tags, {'append': True}, admin=True)
 294
 295
 296
 297     def handle_peer(self, site, slice, persons, peer):
 298         if peer:
 299             # bind site
 300             try:
 301                 if site:
 302                     self.driver.shell.BindObjectToPeer('site', site['site_id'], peer['shortname'], slice['site_id'])
 303             except Exception,e:
 304                 self.driver.shell.DeleteSite(site['site_id'])
 305                 raise e
 306
 307             # bind slice
 308             try:
 309                 if slice:
 310                     self.driver.shell.BindObjectToPeer('slice', slice['slice_id'], peer['shortname'], slice['slice_id'])
 311             except Exception,e:
 312                 self.driver.shell.DeleteSlice(slice['slice_id'])
 313                 raise e
 314
 315             # bind persons
 316             for person in persons:
 317                 try:
 318                     self.driver.shell.BindObjectToPeer('person',
 319                                                      person['person_id'], peer['shortname'], person['peer_person_id'])
 320
 321                     for (key, remote_key_id) in zip(person['keys'], person['key_ids']):
 322                         try:
 323                             self.driver.shell.BindObjectToPeer( 'key', key['key_id'], peer['shortname'], remote_key_id)
 324                         except:
 325                             self.driver.shell.DeleteKey(key['key_id'])
 326                             logger("failed to bind key: %s to peer: %s " % (key['key_id'], peer['shortname']))
 327                 except Exception,e:
 328                     self.driver.shell.DeletePerson(person['person_id'])
 329                     raise e
 330
 331         return slice
 332
 333     def verify_site(self, slice_xrn, slice_record={}, peer=None, sfa_peer=None, options={}):
 334         (slice_hrn, type) = urn_to_hrn(slice_xrn)
 335         site_hrn = get_authority(slice_hrn)
 336         # login base can't be longer than 20 characters
 337         slicename = hrn_to_pl_slicename(slice_hrn)
 338         authority_name = slicename.split('_')[0]
 339         login_base = authority_name[:20]
 340         sites = self.driver.shell.GetSites(login_base)
 341         if not sites:
 342             # create new site record
 343             site = {'name': 'geni.%s' % authority_name,
 344                     'abbreviated_name': authority_name,
 345                     'login_base': login_base,
 346                     'max_slices': 100,
 347                     'max_slivers': 1000,
 348                     'enabled': True,
 349                     'peer_site_id': None}
 350             if peer:
 351                 site['peer_site_id'] = slice_record.get('site_id', None)
 352             site['site_id'] = self.driver.shell.AddSite(site)
 353             # exempt federated sites from monitor policies
 354             self.driver.shell.AddSiteTag(site['site_id'], 'exempt_site_until', "20200101")
 355
 356 #            # is this still necessary?
 357 #            # add record to the local registry
 358 #            if sfa_peer and slice_record:
 359 #                peer_dict = {'type': 'authority', 'hrn': site_hrn, \
 360 #                             'peer_authority': sfa_peer, 'pointer': site['site_id']}
 361 #                self.registry.register_peer_object(self.credential, peer_dict)
 362         else:
 363             site =  sites[0]
 364             if peer:
 365                 # unbind from peer so we can modify if necessary. Will bind back later
 366                 self.driver.shell.UnBindObjectFromPeer('site', site['site_id'], peer['shortname'])
 367
 368         return site
 369
 370     def verify_slice(self, slice_hrn, slice_record, peer, sfa_peer, options={}):
 371         slicename = hrn_to_pl_slicename(slice_hrn)
 372         parts = slicename.split("_")
 373         login_base = parts[0]
 374         slices = self.driver.shell.GetSlices([slicename])
 375         if not slices:
 376             slice = {'name': slicename,
 377                      'url': 'No Url',
 378                      'description': 'No Description'}
 379             # add the slice
 380             slice['slice_id'] = self.driver.shell.AddSlice(slice)
 381             slice['node_ids'] = []
 382             slice['person_ids'] = []
 383             if peer and slice_record:
 384                 slice['peer_slice_id'] = slice_record.get('slice_id', None)
 385         else:
 386             slice = slices[0]
 387             if peer and slice_record:
 388                 slice['peer_slice_id'] = slice_record.get('slice_id', None)
 389                 # unbind from peer so we can modify if necessary. Will bind back later
 390                 self.driver.shell.UnBindObjectFromPeer('slice', slice['slice_id'], peer['shortname'])
 391                 #Update existing record (e.g. expires field) it with the latest info.
 392             if slice_record and slice_record.get('expires'):
 393                 requested_expires = int(datetime_to_epoch(utcparse(slice_record['expires'])))
 394                 if requested_expires and slice['expires'] != requested_expires:
 395                     self.driver.shell.UpdateSlice( slice['slice_id'], {'expires' : requested_expires})
 396
 397         return slice
 398
 399     #def get_existing_persons(self, users):
 400     def verify_persons(self, slice_hrn, slice_record, users, peer, sfa_peer, options={}):
 401         users_by_email = {}
 402         users_by_site = defaultdict(list)
 403         users_dict = {}
 404         for user in users:
 405             user['urn'] = user['urn'].lower()
 406             hrn, type = urn_to_hrn(user['urn'])
 407             username = get_leaf(hrn)
 408             login_base = PlXrn(xrn=user['urn']).pl_login_base()
 409             user['username'] = username
 410             user['site'] = login_base
 411
 412             if 'email' in user:
 413                 user['email'] = user['email'].lower()
 414                 users_by_email[user['email']] = user
 415                 users_dict[user['email']] = user
 416             else:
 417                 users_by_site[user['site']].append(user)
 418
 419         # start building a list of existing users
 420         existing_user_ids = []
 421         existing_user_ids_filter = []
 422         if users_by_email:
 423             existing_user_ids_filter.extend(users_by_email.keys())
 424         if users_by_site:
 425             for login_base in users_by_site:
 426                 users = users_by_site[login_base]
 427                 for user in users:
 428                     existing_user_ids_filter.append(user['username']+'@geni.net')
 429         if existing_user_ids_filter:
 430             # get existing users by email
 431             existing_users = self.driver.shell.GetPersons({'email': existing_user_ids_filter},
 432                                                         ['person_id', 'key_ids', 'email'])
 433             existing_user_ids.extend([user['email'] for user in existing_users])
 434
 435         if users_by_site:
 436             # get a list of user sites (based on requeste user urns
 437             site_list = self.driver.shell.GetSites(users_by_site.keys(), \
 438                 ['site_id', 'login_base', 'person_ids'])
 439             # get all existing users at these sites
 440             sites = {}
 441             site_user_ids = []
 442             for site in site_list:
 443                 sites[site['site_id']] = site
 444                 site_user_ids.extend(site['person_ids'])
 445
 446             existing_site_persons_list = self.driver.shell.GetPersons(site_user_ids,
 447                                                                     ['person_id', 'key_ids', 'email', 'site_ids'])
 448
 449             # all requested users are either existing users or new (added) users
 450             for login_base in users_by_site:
 451                 requested_site_users = users_by_site[login_base]
 452                 for requested_user in requested_site_users:
 453                     user_found = False
 454                     for existing_user in existing_site_persons_list:
 455                         for site_id in existing_user['site_ids']:
 456                             if site_id in sites:
 457                                 site = sites[site_id]
 458                                 if login_base == site['login_base'] and \
 459                                    existing_user['email'].startswith(requested_user['username']+'@'):
 460                                     existing_user_ids.append(existing_user['email'])
 461                                     requested_user['email'] = existing_user['email']
 462                                     users_dict[existing_user['email']] = requested_user
 463                                     user_found = True
 464                                     break
 465                         if user_found:
 466                             break
 467
 468                     if user_found == False:
 469                         fake_email = requested_user['username'] + '@geni.net'
 470                         requested_user['email'] = fake_email
 471                         users_dict[fake_email] = requested_user
 472
 473         # requested slice users
 474         requested_user_ids = users_dict.keys()
 475         # existing slice users
 476         existing_slice_users_filter = {'person_id': slice_record.get('person_ids', [])}
 477         existing_slice_users = self.driver.shell.GetPersons(existing_slice_users_filter,
 478                                                           ['person_id', 'key_ids', 'email'])
 479         existing_slice_user_ids = [user['email'] for user in existing_slice_users]
 480
 481         # users to be added, removed or updated
 482         added_user_ids = set(requested_user_ids).difference(existing_user_ids)
 483         added_slice_user_ids = set(requested_user_ids).difference(existing_slice_user_ids)
 484         removed_user_ids = set(existing_slice_user_ids).difference(requested_user_ids)
 485         updated_user_ids = set(existing_slice_user_ids).intersection(requested_user_ids)
 486
 487         # Remove stale users (only if we are not appending).
 488         # Append by default.
 489         append = options.get('append', True)
 490         if append == False:
 491             for removed_user_id in removed_user_ids:
 492                 self.driver.shell.DeletePersonFromSlice(removed_user_id, slice_record['name'])
 493         # update_existing users
 494         updated_users_list = [user for user in users_dict.values() if user['email'] in \
 495           updated_user_ids]
 496         self.verify_keys(existing_slice_users, updated_users_list, peer, options)
 497
 498         added_persons = []
 499         # add new users
 500         for added_user_id in added_user_ids:
 501             added_user = users_dict[added_user_id]
 502             hrn, type = urn_to_hrn(added_user['urn'])
 503             person = {
 504                 'first_name': added_user.get('first_name', hrn),
 505                 'last_name': added_user.get('last_name', hrn),
 506                 'email': added_user_id,
 507                 'peer_person_id': None,
 508                 'keys': [],
 509                 'key_ids': added_user.get('key_ids', []),
 510             }
 511             person['person_id'] = self.driver.shell.AddPerson(person)
 512             if peer:
 513                 person['peer_person_id'] = added_user['person_id']
 514             added_persons.append(person)
 515
 516             # enable the account
 517             self.driver.shell.UpdatePerson(person['person_id'], {'enabled': True})
 518
 519             # add person to site
 520             self.driver.shell.AddPersonToSite(added_user_id, added_user['site'])
 521
 522             for key_string in added_user.get('keys', []):
 523                 key = {'key':key_string, 'key_type':'ssh'}
 524                 key['key_id'] = self.driver.shell.AddPersonKey(person['person_id'], key)
 525                 person['keys'].append(key)
 526
 527             # add the registry record
 528 #            if sfa_peer:
 529 #                peer_dict = {'type': 'user', 'hrn': hrn, 'peer_authority': sfa_peer, \
 530 #                    'pointer': person['person_id']}
 531 #                self.registry.register_peer_object(self.credential, peer_dict)
 532
 533         for added_slice_user_id in added_slice_user_ids.union(added_user_ids):
 534             # add person to the slice
 535             self.driver.shell.AddPersonToSlice(added_slice_user_id, slice_record['name'])
 536             # if this is a peer record then it should already be bound to a peer.
 537             # no need to return worry about it getting bound later
 538
 539         return added_persons
 540
 541
 542     def verify_keys(self, persons, users, peer, options={}):
 543         # existing keys
 544         key_ids = []
 545         for person in persons:
 546             key_ids.extend(person['key_ids'])
 547         keylist = self.driver.shell.GetKeys(key_ids, ['key_id', 'key'])
 548         keydict = {}
 549         for key in keylist:
 550             keydict[key['key']] = key['key_id']
 551         existing_keys = keydict.keys()
 552         persondict = {}
 553         for person in persons:
 554             persondict[person['email']] = person
 555
 556         # add new keys
 557         requested_keys = []
 558         updated_persons = []
 559         for user in users:
 560             user_keys = user.get('keys', [])
 561             updated_persons.append(user)
 562             for key_string in user_keys:
 563                 requested_keys.append(key_string)
 564                 if key_string not in existing_keys:
 565                     key = {'key': key_string, 'key_type': 'ssh'}
 566                     try:
 567                         if peer:
 568                             person = persondict[user['email']]
 569                             self.driver.shell.UnBindObjectFromPeer('person', person['person_id'], peer['shortname'])
 570                         key['key_id'] = self.driver.shell.AddPersonKey(user['email'], key)
 571                         if peer:
 572                             key_index = user_keys.index(key['key'])
 573                             remote_key_id = user['key_ids'][key_index]
 574                             self.driver.shell.BindObjectToPeer('key', key['key_id'], peer['shortname'], remote_key_id)
 575
 576                     finally:
 577                         if peer:
 578                             self.driver.shell.BindObjectToPeer('person', person['person_id'], peer['shortname'], user['person_id'])
 579
 580         # remove old keys (only if we are not appending)
 581         append = options.get('append', True)
 582         if append == False:
 583             removed_keys = set(existing_keys).difference(requested_keys)
 584             for existing_key_id in keydict:
 585                 if keydict[existing_key_id] in removed_keys:
 586                     try:
 587                         if peer:
 588                             self.driver.shell.UnBindObjectFromPeer('key', existing_key_id, peer['shortname'])
 589                         self.driver.shell.DeleteKey(existing_key_id)
 590                     except:
 591                         pass
 592
 593     def verify_slice_attributes(self, slice, requested_slice_attributes, options={}, admin=False):
 594         append = options.get('append', True)
 595         # get list of attributes users ar able to manage
 596         filter = {'category': '*slice*'}
 597         if not admin:
 598             filter['|roles'] = ['user']
 599         slice_attributes = self.driver.shell.GetTagTypes(filter)
 600         valid_slice_attribute_names = [attribute['tagname'] for attribute in slice_attributes]
 601
 602         # get sliver attributes
 603         added_slice_attributes = []
 604         removed_slice_attributes = []
 605         ignored_slice_attribute_names = []
 606         existing_slice_attributes = self.driver.shell.GetSliceTags({'slice_id': slice['slice_id']})
 607
 608         # get attributes that should be removed
 609         for slice_tag in existing_slice_attributes:
 610             if slice_tag['tagname'] in ignored_slice_attribute_names:
 611                 # If a slice already has a admin only role it was probably given to them by an
 612                 # admin, so we should ignore it.
 613                 ignored_slice_attribute_names.append(slice_tag['tagname'])
 614             else:
 615                 # If an existing slice attribute was not found in the request it should
 616                 # be removed
 617                 attribute_found=False
 618                 for requested_attribute in requested_slice_attributes:
 619                     if requested_attribute['name'] == slice_tag['tagname'] and \
 620                        requested_attribute['value'] == slice_tag['value']:
 621                         attribute_found=True
 622                         break
 623
 624             if not attribute_found and not append:
 625                 removed_slice_attributes.append(slice_tag)
 626
 627         # get attributes that should be added:
 628         for requested_attribute in requested_slice_attributes:
 629             # if the requested attribute wasn't found  we should add it
 630             if requested_attribute['name'] in valid_slice_attribute_names:
 631                 attribute_found = False
 632                 for existing_attribute in existing_slice_attributes:
 633                     if requested_attribute['name'] == existing_attribute['tagname'] and \
 634                        requested_attribute['value'] == existing_attribute['value']:
 635                         attribute_found=True
 636                         break
 637                 if not attribute_found:
 638                     added_slice_attributes.append(requested_attribute)
 639
 640
 641         # remove stale attributes
 642         for attribute in removed_slice_attributes:
 643             try:
 644                 self.driver.shell.DeleteSliceTag(attribute['slice_tag_id'])
 645             except Exception, e:
 646                 logger.warn('Failed to remove sliver attribute. name: %s, value: %s, node_id: %s\nCause:%s'\
 647                                 % (slice['name'], attribute['value'],  attribute.get('node_id'), str(e)))
 648
 649         # add requested_attributes
 650         for attribute in added_slice_attributes:
 651             try:
 652                 self.driver.shell.AddSliceTag(slice['name'], attribute['name'], attribute['value'], attribute.get('node_id', None))
 653             except Exception, e:
 654                 logger.warn('Failed to add sliver attribute. name: %s, value: %s, node_id: %s\nCause:%s'\
 655                                 % (slice['name'], attribute['value'],  attribute.get('node_id'), str(e)))
 656