sfa/plc/slices.py

   1 import datetime
   2 import time
   3 import traceback
   4 import sys
   5
   6 from types import StringTypes
   7 from sfa.util.namespace import get_leaf, get_authority, hrn_to_urn, hrn_to_pl_slicename, urn_to_hrn
   8 from sfa.util.rspec import *
   9 from sfa.util.specdict import *
  10 from sfa.util.faults import *
  11 from sfa.util.record import SfaRecord
  12 from sfa.util.policy import Policy
  13 from sfa.util.prefixTree import prefixTree
  14
  15 MAXINT =  2L**31-1
  16
  17 class Slices:
  18
  19     rspec_to_slice_tag = {'max_rate':'net_max_rate'}
  20
  21     def __init__(self, api, ttl = .5, origin_hrn=None):
  22         self.api = api
  23         #filepath = path + os.sep + filename
  24         self.policy = Policy(self.api)
  25         self.origin_hrn = origin_hrn
  26
  27     def get_slivers(self, xrn, node=None):
  28         hrn, type = urn_to_hrn(xrn)
  29
  30         slice_name = hrn_to_pl_slicename(hrn)
  31         # XX Should we just call PLCAPI.GetSliceTicket(slice_name) instead
  32         # of doing all of this?
  33         #return self.api.GetSliceTicket(self.auth, slice_name)
  34
  35         # from PLCAPI.GetSlivers.get_slivers()
  36         slice_fields = ['slice_id', 'name', 'instantiation', 'expires', 'person_ids', 'slice_tag_ids']
  37         slices = self.api.plshell.GetSlices(self.api.plauth, slice_name, slice_fields)
  38         # Build up list of users and slice attributes
  39         person_ids = set()
  40         all_slice_tag_ids = set()
  41         for slice in slices:
  42             person_ids.update(slice['person_ids'])
  43             all_slice_tag_ids.update(slice['slice_tag_ids'])
  44         person_ids = list(person_ids)
  45         all_slice_tag_ids = list(all_slice_tag_ids)
  46         # Get user information
  47         all_persons_list = self.api.plshell.GetPersons(self.api.plauth, {'person_id':person_ids,'enabled':True}, ['person_id', 'enabled', 'key_ids'])
  48         all_persons = {}
  49         for person in all_persons_list:
  50             all_persons[person['person_id']] = person
  51
  52         # Build up list of keys
  53         key_ids = set()
  54         for person in all_persons.values():
  55             key_ids.update(person['key_ids'])
  56         key_ids = list(key_ids)
  57         # Get user account keys
  58         all_keys_list = self.api.plshell.GetKeys(self.api.plauth, key_ids, ['key_id', 'key', 'key_type'])
  59         all_keys = {}
  60         for key in all_keys_list:
  61             all_keys[key['key_id']] = key
  62         # Get slice attributes
  63         all_slice_tags_list = self.api.plshell.GetSliceTags(self.api.plauth, all_slice_tag_ids)
  64         all_slice_tags = {}
  65         for slice_tag in all_slice_tags_list:
  66             all_slice_tags[slice_tag['slice_tag_id']] = slice_tag
  67
  68         slivers = []
  69         for slice in slices:
  70             keys = []
  71             for person_id in slice['person_ids']:
  72                 if person_id in all_persons:
  73                     person = all_persons[person_id]
  74                     if not person['enabled']:
  75                         continue
  76                     for key_id in person['key_ids']:
  77                         if key_id in all_keys:
  78                             key = all_keys[key_id]
  79                             keys += [{'key_type': key['key_type'],
  80                                     'key': key['key']}]
  81             attributes = []
  82             # All (per-node and global) attributes for this slice
  83             slice_tags = []
  84             for slice_tag_id in slice['slice_tag_ids']:
  85                 if slice_tag_id in all_slice_tags:
  86                     slice_tags.append(all_slice_tags[slice_tag_id])
  87             # Per-node sliver attributes take precedence over global
  88             # slice attributes, so set them first.
  89             # Then comes nodegroup slice attributes
  90             # Followed by global slice attributes
  91             sliver_attributes = []
  92
  93             if node is not None:
  94                 for sliver_attribute in filter(lambda a: a['node_id'] == node['node_id'], slice_tags):
  95                     sliver_attributes.append(sliver_attribute['tagname'])
  96                     attributes.append({'tagname': sliver_attribute['tagname'],
  97                                     'value': sliver_attribute['value']})
  98
  99             # set nodegroup slice attributes
 100             for slice_tag in filter(lambda a: a['nodegroup_id'] in node['nodegroup_ids'], slice_tags):
 101                 # Do not set any nodegroup slice attributes for
 102                 # which there is at least one sliver attribute
 103                 # already set.
 104                 if slice_tag not in slice_tags:
 105                     attributes.append({'tagname': slice_tag['tagname'],
 106                         'value': slice_tag['value']})
 107
 108             for slice_tag in filter(lambda a: a['node_id'] is None, slice_tags):
 109                 # Do not set any global slice attributes for
 110                 # which there is at least one sliver attribute
 111                 # already set.
 112                 if slice_tag['tagname'] not in sliver_attributes:
 113                     attributes.append({'tagname': slice_tag['tagname'],
 114                                    'value': slice_tag['value']})
 115
 116             # XXX Sanity check; though technically this should be a system invariant
 117             # checked with an assertion
 118             if slice['expires'] > MAXINT:  slice['expires']= MAXINT
 119
 120             slivers.append({
 121                 'hrn': hrn,
 122                 'name': slice['name'],
 123                 'slice_id': slice['slice_id'],
 124                 'instantiation': slice['instantiation'],
 125                 'expires': slice['expires'],
 126                 'keys': keys,
 127                 'attributes': attributes
 128             })
 129
 130         return slivers
 131
 132     def get_peer(self, xrn):
 133         hrn, type = urn_to_hrn(xrn)
 134         # Becaues of myplc federation,  we first need to determine if this
 135         # slice belongs to out local plc or a myplc peer. We will assume it
 136         # is a local site, unless we find out otherwise
 137         peer = None
 138
 139         # get this slice's authority (site)
 140         slice_authority = get_authority(hrn)
 141
 142         # get this site's authority (sfa root authority or sub authority)
 143         site_authority = get_authority(slice_authority).lower()
 144
 145         # check if we are already peered with this site_authority, if so
 146         peers = self.api.plshell.GetPeers(self.api.plauth, {}, ['peer_id', 'peername', 'shortname', 'hrn_root'])
 147         for peer_record in peers:
 148             names = [name.lower() for name in peer_record.values() if isinstance(name, StringTypes)]
 149             if site_authority in names:
 150                 peer = peer_record['shortname']
 151
 152         return peer
 153
 154     def get_sfa_peer(self, xrn):
 155         hrn, type = urn_to_hrn(xrn)
 156
 157         # return the authority for this hrn or None if we are the authority
 158         sfa_peer = None
 159         slice_authority = get_authority(hrn)
 160         site_authority = get_authority(slice_authority)
 161
 162         if site_authority != self.api.hrn:
 163             sfa_peer = site_authority
 164
 165         return sfa_peer
 166
 167     def verify_site(self, registry, credential, slice_hrn, peer, sfa_peer, reg_objects=None):
 168         authority = get_authority(slice_hrn)
 169         authority_urn = hrn_to_urn(authority, 'authority')
 170         login_base = None
 171         if reg_objects:
 172             site = reg_objects['site']
 173             login_base = site['login_base']
 174         else:
 175             site_records = registry.Resolve(authority_urn, [credential])
 176             site = {}
 177             for site_record in site_records:
 178                 if site_record['type'] == 'authority':
 179                     site = site_record
 180             if not site:
 181                 raise RecordNotFound(authority)
 182
 183         remote_site_id = site.pop('site_id')
 184
 185         if login_base is None:
 186             login_base = get_leaf(authority)
 187         sites = self.api.plshell.GetSites(self.api.plauth, login_base)
 188
 189         if not sites:
 190             site_id = self.api.plshell.AddSite(self.api.plauth, site)
 191             if peer:
 192                 try:
 193                     self.api.plshell.BindObjectToPeer(self.api.plauth, 'site', site_id, peer, remote_site_id)
 194                 except Exception,e:
 195                     self.api.plshell.DeleteSite(self.api.plauth, site_id)
 196                     raise e
 197             # mark this site as an sfa peer record
 198             if sfa_peer and not reg_objects:
 199                 peer_dict = {'type': 'authority', 'hrn': authority, 'peer_authority': sfa_peer, 'pointer': site_id}
 200                 registry.register_peer_object(credential, peer_dict)
 201         else:
 202             site_id = sites[0]['site_id']
 203             remote_site_id = sites[0]['peer_site_id']
 204
 205             old_site = sites[0]
 206             #the site is already on the remote agg. Let us update(e.g. max_slices field) it with the latest info.
 207             self.sync_site(old_site, site, peer)
 208
 209
 210         return (site_id, remote_site_id)
 211
 212     def verify_slice(self, registry, credential, slice_hrn, site_id, remote_site_id, peer, sfa_peer, reg_objects=None):
 213         slice = {}
 214         slice_record = None
 215         authority = get_authority(slice_hrn)
 216
 217         if reg_objects:
 218             slice_record = reg_objects['slice_record']
 219         else:
 220             slice_records = registry.Resolve(slice_hrn, [credential])
 221
 222             for record in slice_records:
 223                 if record['type'] in ['slice']:
 224                     slice_record = record
 225             if not slice_record:
 226                 raise RecordNotFound(hrn)
 227
 228
 229         slicename = hrn_to_pl_slicename(slice_hrn)
 230         parts = slicename.split("_")
 231         login_base = parts[0]
 232         slices = self.api.plshell.GetSlices(self.api.plauth, [slicename])
 233         if not slices:
 234             slice_fields = {}
 235             slice_keys = ['name', 'url', 'description']
 236             for key in slice_keys:
 237                 if key in slice_record and slice_record[key]:
 238                     slice_fields[key] = slice_record[key]
 239             # add the slice
 240             slice_id = self.api.plshell.AddSlice(self.api.plauth, slice_fields)
 241             slice = slice_fields
 242             slice['slice_id'] = slice_id
 243
 244             # mark this slice as an sfa peer record
 245             if sfa_peer:
 246                 peer_dict = {'type': 'slice', 'hrn': slice_hrn, 'peer_authority': sfa_peer, 'pointer': slice_id}
 247                 registry.register_peer_object(credential, peer_dict)
 248
 249             #this belongs to a peer
 250             if peer:
 251                 try:
 252                     self.api.plshell.BindObjectToPeer(self.api.plauth, 'slice', slice_id, peer, slice_record['pointer'])
 253                 except Exception,e:
 254                     self.api.plshell.DeleteSlice(self.api.plauth,slice_id)
 255                     raise e
 256             slice['node_ids'] = []
 257         else:
 258             slice = slices[0]
 259             slice_id = slice['slice_id']
 260             site_id = slice['site_id']
 261             #the slice is alredy on the remote agg. Let us update(e.g. expires field) it with the latest info.
 262             self.sync_slice(slice, slice_record, peer)
 263
 264         slice['peer_slice_id'] = slice_record['pointer']
 265         self.verify_persons(registry, credential, slice_record, site_id, remote_site_id, peer, sfa_peer, reg_objects)
 266
 267         return slice
 268
 269     def verify_persons(self, registry, credential, slice_record, site_id, remote_site_id, peer, sfa_peer, reg_objects=None):
 270         # get the list of valid slice users from the registry and make
 271         # sure they are added to the slice
 272         slicename = hrn_to_pl_slicename(slice_record['hrn'])
 273         if reg_objects:
 274             researchers = reg_objects['users'].keys()
 275         else:
 276             researchers = slice_record.get('researcher', [])
 277         for researcher in researchers:
 278             if reg_objects:
 279                 person_dict = reg_objects['users'][researcher]
 280             else:
 281                 person_records = registry.Resolve(researcher, [credential])
 282                 for record in person_records:
 283                     if record['type'] in ['user'] and record['enabled']:
 284                         person_record = record
 285                 if not person_record:
 286                     return 1
 287                 person_dict = person_record
 288
 289             local_person=False
 290             if peer:
 291                 peer_id = self.api.plshell.GetPeers(self.api.plauth, {'shortname': peer}, ['peer_id'])[0]['peer_id']
 292                 persons = self.api.plshell.GetPersons(self.api.plauth, {'email': [person_dict['email']], 'peer_id': peer_id}, ['person_id', 'key_ids'])
 293                 if not persons:
 294                     persons = self.api.plshell.GetPersons(self.api.plauth, [person_dict['email']], ['person_id', 'key_ids'])
 295                     if persons:
 296                         local_person=True
 297
 298             else:
 299                 persons = self.api.plshell.GetPersons(self.api.plauth, [person_dict['email']], ['person_id', 'key_ids'])
 300
 301             if not persons:
 302                 person_id=self.api.plshell.AddPerson(self.api.plauth, person_dict)
 303                 self.api.plshell.UpdatePerson(self.api.plauth, person_id, {'enabled' : True})
 304
 305                 # mark this person as an sfa peer record
 306                 if sfa_peer:
 307                     peer_dict = {'type': 'user', 'hrn': researcher, 'peer_authority': sfa_peer, 'pointer': person_id}
 308                     registry.register_peer_object(credential, peer_dict)
 309
 310                 if peer:
 311                     try:
 312                         self.api.plshell.BindObjectToPeer(self.api.plauth, 'person', person_id, peer, person_dict['pointer'])
 313                     except Exception,e:
 314                         self.api.plshell.DeletePerson(self.api.plauth,person_id)
 315                         raise e
 316                 key_ids = []
 317             else:
 318                 person_id = persons[0]['person_id']
 319                 key_ids = persons[0]['key_ids']
 320
 321
 322             # if this is a peer person, we must unbind them from the peer or PLCAPI will throw
 323             # an error
 324             try:
 325                 if peer and not local_person:
 326                     self.api.plshell.UnBindObjectFromPeer(self.api.plauth, 'person', person_id, peer)
 327                 if peer:
 328                     self.api.plshell.UnBindObjectFromPeer(self.api.plauth, 'site', site_id,  peer)
 329
 330                 self.api.plshell.AddPersonToSlice(self.api.plauth, person_dict['email'], slicename)
 331                 self.api.plshell.AddPersonToSite(self.api.plauth, person_dict['email'], site_id)
 332             finally:
 333                 if peer:
 334                     try: self.api.plshell.BindObjectToPeer(self.api.plauth, 'site', site_id, peer, remote_site_id)
 335                     except: pass
 336                 if peer and not local_person:
 337                     try: self.api.plshell.BindObjectToPeer(self.api.plauth, 'person', person_id, peer, person_dict['pointer'])
 338                     except: pass
 339
 340             self.verify_keys(registry, credential, person_dict, key_ids, person_id, peer, local_person)
 341
 342     def verify_keys(self, registry, credential, person_dict, key_ids, person_id,  peer, local_person):
 343         keylist = self.api.plshell.GetKeys(self.api.plauth, key_ids, ['key'])
 344         keys = [key['key'] for key in keylist]
 345
 346         #add keys that arent already there
 347         key_ids = person_dict['key_ids']
 348         for personkey in person_dict['keys']:
 349             if personkey not in keys:
 350                 key = {'key_type': 'ssh', 'key': personkey}
 351                 try:
 352                     if peer:
 353                         self.api.plshell.UnBindObjectFromPeer(self.api.plauth, 'person', person_id, peer)
 354                     key_id = self.api.plshell.AddPersonKey(self.api.plauth, person_dict['email'], key)
 355                 finally:
 356                     if peer and not local_person:
 357                         self.api.plshell.BindObjectToPeer(self.api.plauth, 'person', person_id, peer, person_dict['pointer'])
 358                     if peer:
 359                         # xxx - thierry how are we getting the peer_key_id in here ?
 360                         try: self.api.plshell.BindObjectToPeer(self.api.plauth, 'key', key_id, peer, key_ids.pop(0))
 361                         except: pass
 362
 363     def create_slice_aggregate(self, xrn, rspec):
 364         hrn, type = urn_to_hrn(xrn)
 365         # Determine if this is a peer slice
 366         peer = self.get_peer(hrn)
 367         sfa_peer = self.get_sfa_peer(hrn)
 368
 369         spec = RSpec(rspec)
 370         # Get the slice record from sfa
 371         slicename = hrn_to_pl_slicename(hrn)
 372         slice = {}
 373         slice_record = None
 374         registry = self.api.registries[self.api.hrn]
 375         credential = self.api.getCredential()
 376
 377         site_id, remote_site_id = self.verify_site(registry, credential, hrn, peer, sfa_peer)
 378         slice = self.verify_slice(registry, credential, hrn, site_id, remote_site_id, peer, sfa_peer)
 379
 380         # find out where this slice is currently running
 381         nodelist = self.api.plshell.GetNodes(self.api.plauth, slice['node_ids'], ['hostname'])
 382         hostnames = [node['hostname'] for node in nodelist]
 383
 384         # get netspec details
 385         nodespecs = spec.getDictsByTagName('NodeSpec')
 386
 387         # dict in which to store slice attributes to set for the nodes
 388         nodes = {}
 389         for nodespec in nodespecs:
 390             if isinstance(nodespec['name'], list):
 391                 for nodename in nodespec['name']:
 392                     nodes[nodename] = {}
 393                     for k in nodespec.keys():
 394                         rspec_attribute_value = nodespec[k]
 395                         if (self.rspec_to_slice_tag.has_key(k)):
 396                             slice_tag_name = self.rspec_to_slice_tag[k]
 397                             nodes[nodename][slice_tag_name] = rspec_attribute_value
 398             elif isinstance(nodespec['name'], StringTypes):
 399                 nodename = nodespec['name']
 400                 nodes[nodename] = {}
 401                 for k in nodespec.keys():
 402                     rspec_attribute_value = nodespec[k]
 403                     if (self.rspec_to_slice_tag.has_key(k)):
 404                         slice_tag_name = self.rspec_to_slice_tag[k]
 405                         nodes[nodename][slice_tag_name] = rspec_attribute_value
 406
 407                 for k in nodespec.keys():
 408                     rspec_attribute_value = nodespec[k]
 409                     if (self.rspec_to_slice_tag.has_key(k)):
 410                         slice_tag_name = self.rspec_to_slice_tag[k]
 411                         nodes[nodename][slice_tag_name] = rspec_attribute_value
 412
 413         node_names = nodes.keys()
 414         # remove nodes not in rspec
 415         deleted_nodes = list(set(hostnames).difference(node_names))
 416         # add nodes from rspec
 417         added_nodes = list(set(node_names).difference(hostnames))
 418
 419         try:
 420             if peer:
 421                 self.api.plshell.UnBindObjectFromPeer(self.api.plauth, 'slice', slice['slice_id'], peer)
 422
 423             self.api.plshell.AddSliceToNodes(self.api.plauth, slicename, added_nodes)
 424
 425             # Add recognized slice tags
 426             for node_name in node_names:
 427                 node = nodes[node_name]
 428                 for slice_tag in node.keys():
 429                     value = node[slice_tag]
 430                     if (isinstance(value, list)):
 431                         value = value[0]
 432
 433                     self.api.plshell.AddSliceTag(self.api.plauth, slicename, slice_tag, value, node_name)
 434
 435             self.api.plshell.DeleteSliceFromNodes(self.api.plauth, slicename, deleted_nodes)
 436         finally:
 437             if peer:
 438                 self.api.plshell.BindObjectToPeer(self.api.plauth, 'slice', slice['slice_id'], peer, slice['peer_slice_id'])
 439
 440         return 1
 441
 442     def sync_site(self, old_record, new_record, peer):
 443         if old_record['max_slices'] != new_record['max_slices'] or old_record['max_slivers'] != new_record['max_slivers']:
 444             try:
 445                 if peer:
 446                     self.api.plshell.UnBindObjectFromPeer(self.api.plauth, 'site', old_record['site_id'], peer)
 447                 if old_record['max_slices'] != new_record['max_slices']:
 448                     self.api.plshell.UpdateSite(self.api.plauth, old_record['site_id'], {'max_slices' : new_record['max_slices']})
 449                 if old_record['max_slivers'] != new_record['max_slivers']:
 450                     self.api.plshell.UpdateSite(self.api.plauth, old_record['site_id'], {'max_slivers' : new_record['max_slivers']})
 451             finally:
 452                 if peer:
 453                     self.api.plshell.BindObjectToPeer(self.api.plauth, 'site', old_record['site_id'], peer, old_record['peer_site_id'])
 454         return 1
 455
 456     def sync_slice(self, old_record, new_record, peer):
 457         if old_record['expires'] != new_record['expires']:
 458             try:
 459                 if peer:
 460                     self.api.plshell.UnBindObjectFromPeer(self.api.plauth, 'slice', old_record['slice_id'], peer)
 461                 self.api.plshell.UpdateSlice(self.api.plauth, old_record['slice_id'], {'expires' : new_record['expires']})
 462             finally:
 463                 if peer:
 464                     self.api.plshell.BindObjectToPeer(self.api.plauth, 'slice', old_record['slice_id'], peer, old_record['peer_slice_id'])
 465         return 1