sfa/plc/slices.py

   1 ### $Id$
   2 ### $URL$
   3
   4 import datetime
   5 import time
   6 import traceback
   7 import sys
   8
   9 from types import StringTypes
  10 from sfa.util.misc import *
  11 from sfa.util.rspec import *
  12 from sfa.util.specdict import *
  13 from sfa.util.faults import *
  14 from sfa.util.storage import *
  15 from sfa.util.policy import Policy
  16 from sfa.util.prefixTree import prefixTree
  17 from sfa.util.debug import log
  18 from sfa.server.aggregate import Aggregates
  19 from sfa.server.registry import Registries
  20
  21 class Slices(SimpleStorage):
  22
  23     def __init__(self, api, ttl = .5, caller_cred=None):
  24         self.api = api
  25         self.ttl = ttl
  26         self.threshold = None
  27         path = self.api.config.SFA_BASE_DIR
  28         filename = ".".join([self.api.interface, self.api.hrn, "slices"])
  29         filepath = path + os.sep + filename
  30         self.slices_file = filepath
  31         SimpleStorage.__init__(self, self.slices_file)
  32         self.policy = Policy(self.api)
  33         self.load()
  34         self.caller_cred=caller_cred
  35
  36
  37     def get_peer(self, hrn):
  38         # Becaues of myplc federation,  we first need to determine if this
  39         # slice belongs to out local plc or a myplc peer. We will assume it
  40         # is a local site, unless we find out otherwise
  41         peer = None
  42
  43         # get this slice's authority (site)
  44         slice_authority = get_authority(hrn)
  45
  46         # get this site's authority (sfa root authority or sub authority)
  47         site_authority = get_authority(slice_authority).lower()
  48
  49         # check if we are already peered with this site_authority, if so
  50         peers = self.api.plshell.GetPeers(self.api.plauth, {}, ['peer_id', 'peername', 'shortname', 'hrn_root'])
  51         for peer_record in peers:
  52             names = [name.lower() for name in peer_record.values() if isinstance(name, StringTypes)]
  53             if site_authority in names:
  54                 peer = peer_record['shortname']
  55
  56         return peer
  57
  58     def get_sfa_peer(self, hrn):
  59         # return the authority for this hrn or None if we are the authority
  60         sfa_peer = None
  61         slice_authority = get_authority(hrn)
  62         site_authority = get_authority(slice_authority)
  63
  64         if site_authority != self.api.hrn:
  65             sfa_peer = site_authority
  66
  67         return sfa_peer
  68
  69     def refresh(self):
  70         """
  71         Update the cached list of slices
  72         """
  73         # Reload components list
  74         now = datetime.datetime.now()
  75         if not self.has_key('threshold') or not self.has_key('timestamp') or \
  76            now > datetime.datetime.fromtimestamp(time.mktime(time.strptime(self['threshold'], self.api.time_format))):
  77             if self.api.interface in ['aggregate']:
  78                 self.refresh_slices_aggregate()
  79             elif self.api.interface in ['slicemgr']:
  80                 self.refresh_slices_smgr()
  81
  82     def refresh_slices_aggregate(self):
  83         slices = self.api.plshell.GetSlices(self.api.plauth, {'peer_id': None}, ['name'])
  84         slice_hrns = [slicename_to_hrn(self.api.hrn, slice['name']) for slice in slices]
  85
  86          # update timestamp and threshold
  87         timestamp = datetime.datetime.now()
  88         hr_timestamp = timestamp.strftime(self.api.time_format)
  89         delta = datetime.timedelta(hours=self.ttl)
  90         threshold = timestamp + delta
  91         hr_threshold = threshold.strftime(self.api.time_format)
  92
  93         slice_details = {'hrn': slice_hrns,
  94                          'timestamp': hr_timestamp,
  95                          'threshold': hr_threshold
  96                         }
  97         self.update(slice_details)
  98         self.write()
  99
 100
 101     def refresh_slices_smgr(self):
 102         slice_hrns = []
 103         aggregates = Aggregates(self.api)
 104         credential = self.api.getCredential()
 105         for aggregate in aggregates:
 106             try:
 107                 slices = aggregates[aggregate].get_slices(credential)
 108                 slice_hrns.extend(slices)
 109             except:
 110                 print >> log, "Error calling slices at aggregate %(aggregate)s" % locals()
 111          # update timestamp and threshold
 112         timestamp = datetime.datetime.now()
 113         hr_timestamp = timestamp.strftime(self.api.time_format)
 114         delta = datetime.timedelta(hours=self.ttl)
 115         threshold = timestamp + delta
 116         hr_threshold = threshold.strftime(self.api.time_format)
 117
 118         slice_details = {'hrn': slice_hrns,
 119                          'timestamp': hr_timestamp,
 120                          'threshold': hr_threshold
 121                         }
 122         self.update(slice_details)
 123         self.write()
 124
 125
 126     def delete_slice(self, hrn):
 127         if self.api.interface in ['aggregate']:
 128             self.delete_slice_aggregate(hrn)
 129         elif self.api.interface in ['slicemgr']:
 130             self.delete_slice_smgr(hrn)
 131
 132     def delete_slice_aggregate(self, hrn):
 133
 134         slicename = hrn_to_pl_slicename(hrn)
 135         slices = self.api.plshell.GetSlices(self.api.plauth, {'name': slicename})
 136         if not slices:
 137             return 1
 138         slice = slices[0]
 139
 140         # determine if this is a peer slice
 141         peer = self.get_peer(hrn)
 142         if peer:
 143             self.api.plshell.UnBindObjectFromPeer(self.api.plauth, 'slice', slice['slice_id'], peer)
 144         self.api.plshell.DeleteSliceFromNodes(self.api.plauth, slicename, slice['node_ids'])
 145         if peer:
 146             self.api.plshell.BindObjectToPeer(self.api.plauth, 'slice', slice['slice_id'], peer, slice['peer_slice_id'])
 147         return 1
 148
 149     def delete_slice_smgr(self, hrn):
 150         credential = self.api.getCredential()
 151         aggregates = Aggregates(self.api)
 152         for aggregate in aggregates:
 153             try:
 154                 aggregates[aggregate].delete_slice(credential, hrn, caller_cred=self.caller_cred)
 155             except:
 156                 print >> log, "Error calling list nodes at aggregate %s" % aggregate
 157                 traceback.print_exc(log)
 158                 exc_type, exc_value, exc_traceback = sys.exc_info()
 159                 print exc_type, exc_value, exc_traceback
 160
 161     def create_slice(self, hrn, rspec):
 162
 163         # check our slice policy before we procede
 164         whitelist = self.policy['slice_whitelist']
 165         blacklist = self.policy['slice_blacklist']
 166
 167         if whitelist and hrn not in whitelist or \
 168            blacklist and hrn in blacklist:
 169             policy_file = self.policy.policy_file
 170             print >> log, "Slice %(hrn)s not allowed by policy %(policy_file)s" % locals()
 171             return 1
 172
 173         if self.api.interface in ['aggregate']:
 174             self.create_slice_aggregate(hrn, rspec)
 175         elif self.api.interface in ['slicemgr']:
 176             self.create_slice_smgr(hrn, rspec)
 177
 178     def verify_site(self, registry, credential, slice_hrn, peer, sfa_peer):
 179         authority = get_authority(slice_hrn)
 180         site_records = registry.resolve(credential, authority)
 181         site = {}
 182         for site_record in site_records:
 183             if site_record['type'] == 'authority':
 184                 site = site_record.as_dict()
 185         if not site:
 186             raise RecordNotFound(authority)
 187         remote_site_id = site.pop('site_id')
 188
 189         login_base = get_leaf(authority)
 190         sites = self.api.plshell.GetSites(self.api.plauth, login_base)
 191         if not sites:
 192             site_id = self.api.plshell.AddSite(self.api.plauth, site)
 193             if peer:
 194                 self.api.plshell.BindObjectToPeer(self.api.plauth, 'site', site_id, peer, remote_site_id)
 195             # mark this site as an sfa peer record
 196             if sfa_peer:
 197                 #regsitry.register_peer(credential, authority, 'authority', sfa_peer)
 198                 pass
 199         else:
 200             site_id = sites[0]['site_id']
 201             remote_site_id = sites[0]['peer_site_id']
 202
 203
 204         return (site_id, remote_site_id)
 205
 206     def verify_slice(self, registry, credential, slice_hrn, site_id, remote_site_id, peer, sfa_peer):
 207         slice = {}
 208         slice_record = None
 209         authority = get_authority(slice_hrn)
 210         slice_records = registry.resolve(credential, slice_hrn)
 211         for record in slice_records:
 212             if record['type'] in ['slice']:
 213                 slice_record = record
 214         if not slice_record:
 215             raise RecordNotFound(hrn)
 216         slicename = hrn_to_pl_slicename(slice_hrn)
 217         parts = slicename.split("_")
 218         login_base = parts[0]
 219         slices = self.api.plshell.GetSlices(self.api.plauth, [slicename], ['slice_id', 'node_ids', 'site_id'])
 220         if not slices:
 221             slice_fields = {}
 222             slice_keys = ['name', 'url', 'description']
 223             for key in slice_keys:
 224                 if key in slice_record and slice_record[key]:
 225                     slice_fields[key] = slice_record[key]
 226
 227             # add the slice
 228             slice_id = self.api.plshell.AddSlice(self.api.plauth, slice_fields)
 229             slice = slice_fields
 230             slice['slice_id'] = slice_id
 231
 232             # mark this slice as an sfa peer record
 233             if sfa_peer:
 234                 #registry.register_peer(credential, slice_hrn, 'slice', authority)
 235                 pass
 236
 237             #this belongs to a peer
 238             if peer:
 239                 self.api.plshell.BindObjectToPeer(self.api.plauth, 'slice', slice_id, peer, slice_record['pointer'])
 240             slice['node_ids'] = []
 241         else:
 242             slice = slices[0]
 243             slice_id = slice['slice_id']
 244             site_id = slice['site_id']
 245
 246         slice['peer_slice_id'] = slice_record['pointer']
 247         self.verify_persons(registry, credential, slice_record, site_id, remote_site_id, peer, sfa_peer)
 248
 249         return slice
 250
 251     def verify_persons(self, registry, credential, slice_record, site_id, remote_site_id, peer, sfa_peer):
 252         # get the list of valid slice users from the registry and make
 253         # sure they are added to the slice
 254         slicename = hrn_to_pl_slicename(slice_record['hrn'])
 255         researchers = slice_record.get('researcher', [])
 256         for researcher in researchers:
 257             person_record = {}
 258             person_records = registry.resolve(credential, researcher)
 259             for record in person_records:
 260                 if record['type'] in ['user']:
 261                     person_record = record
 262             if not person_record:
 263                 pass
 264             person_dict = person_record.as_dict()
 265             if peer:
 266                 peer_id = self.api.plshell.GetPeers(self.api.plauth, {'shortname': peer}, ['peer_id'])[0]['peer_id']
 267                 persons = self.api.plshell.GetPersons(self.api.plauth, {'email': [person_dict['email']], 'peer_id': peer_id}, ['person_id', 'key_ids'])
 268
 269             else:
 270                 persons = self.api.plshell.GetPersons(self.api.plauth, [person_dict['email']], ['person_id', 'key_ids'])
 271
 272             if not persons:
 273                 person_id=self.api.plshell.AddPerson(self.api.plauth, person_dict)
 274                 self.api.plshell.UpdatePerson(self.api.plauth, person_id, {'enabled' : True})
 275
 276                 # mark this person as an sfa peer record
 277                 if sfa_peer:
 278                     #registry.register_peer(credential, researcher, 'user', authority)
 279                     pass
 280
 281                 if peer:
 282                     self.api.plshell.BindObjectToPeer(self.api.plauth, 'person', person_id, peer, person_dict['pointer'])
 283                 key_ids = []
 284             else:
 285                 person_id = persons[0]['person_id']
 286                 key_ids = persons[0]['key_ids']
 287
 288
 289             # if this is a peer person, we must unbind them from the peer or PLCAPI will throw
 290             # an error
 291             if peer:
 292                 self.api.plshell.UnBindObjectFromPeer(self.api.plauth, 'person', person_id, peer)
 293                 self.api.plshell.UnBindObjectFromPeer(self.api.plauth, 'site', site_id,  peer)
 294
 295             self.api.plshell.AddPersonToSlice(self.api.plauth, person_dict['email'], slicename)
 296             self.api.plshell.AddPersonToSite(self.api.plauth, person_dict['email'], site_id)
 297             if peer:
 298                 self.api.plshell.BindObjectToPeer(self.api.plauth, 'person', person_id, peer, person_dict['pointer'])
 299                 self.api.plshell.BindObjectToPeer(self.api.plauth, 'site', site_id, peer, remote_site_id)
 300
 301             self.verify_keys(registry, credential, person_dict, key_ids, person_id, peer)
 302
 303     def verify_keys(self, registry, credential, person_dict, key_ids, person_id,  peer):
 304         keylist = self.api.plshell.GetKeys(self.api.plauth, key_ids, ['key'])
 305         keys = [key['key'] for key in keylist]
 306
 307         #add keys that arent already there
 308         key_ids = person_dict['key_ids']
 309         for personkey in person_dict['keys']:
 310             if personkey not in keys:
 311                 key = {'key_type': 'ssh', 'key': personkey}
 312                 if peer:
 313                     self.api.plshell.UnBindObjectFromPeer(self.api.plauth, 'person', person_id, peer)
 314                 key_id = self.api.plshell.AddPersonKey(self.api.plauth, person_dict['email'], key)
 315                 if peer:
 316                     self.api.plshell.BindObjectToPeer(self.api.plauth, 'person', person_id, peer, person_dict['pointer'])
 317                     try: self.api.plshell.BindObjectToPeer(self.api.plauth, 'key', key_id, peer, key_ids.pop(0))
 318
 319                     except: pass
 320
 321     def create_slice_aggregate(self, hrn, rspec):
 322
 323         # Determine if this is a peer slice
 324         peer = self.get_peer(hrn)
 325         sfa_peer = self.get_sfa_peer(hrn)
 326
 327         spec = Rspec(rspec)
 328         # Get the slice record from sfa
 329         slicename = hrn_to_pl_slicename(hrn)
 330         slice = {}
 331         slice_record = None
 332         registries = Registries(self.api)
 333         registry = registries[self.api.hrn]
 334         credential = self.api.getCredential()
 335
 336         site_id, remote_site_id = self.verify_site(registry, credential, hrn, peer, sfa_peer)
 337         slice = self.verify_slice(registry, credential, hrn, site_id, remote_site_id, peer, sfa_peer)
 338
 339         # find out where this slice is currently running
 340         nodelist = self.api.plshell.GetNodes(self.api.plauth, slice['node_ids'], ['hostname'])
 341         hostnames = [node['hostname'] for node in nodelist]
 342
 343         # get netspec details
 344         nodespecs = spec.getDictsByTagName('NodeSpec')
 345         nodes = []
 346         for nodespec in nodespecs:
 347             if isinstance(nodespec['name'], list):
 348                 nodes.extend(nodespec['name'])
 349             elif isinstance(nodespec['name'], StringTypes):
 350                 nodes.append(nodespec['name'])
 351
 352         # remove nodes not in rspec
 353         deleted_nodes = list(set(hostnames).difference(nodes))
 354         # add nodes from rspec
 355         added_nodes = list(set(nodes).difference(hostnames))
 356
 357         if peer:
 358             self.api.plshell.UnBindObjectFromPeer(self.api.plauth, 'slice', slice['slice_id'], peer)
 359         self.api.plshell.AddSliceToNodes(self.api.plauth, slicename, added_nodes)
 360         self.api.plshell.DeleteSliceFromNodes(self.api.plauth, slicename, deleted_nodes)
 361         if peer:
 362             self.api.plshell.BindObjectToPeer(self.api.plauth, 'slice', slice['slice_id'], peer, slice['peer_slice_id'])
 363
 364         return 1
 365
 366     def create_slice_smgr(self, hrn, rspec):
 367         spec = Rspec()
 368         tempspec = Rspec()
 369         spec.parseString(rspec)
 370         slicename = hrn_to_pl_slicename(hrn)
 371         specDict = spec.toDict()
 372         if specDict.has_key('Rspec'): specDict = specDict['Rspec']
 373         if specDict.has_key('start_time'): start_time = specDict['start_time']
 374         else: start_time = 0
 375         if specDict.has_key('end_time'): end_time = specDict['end_time']
 376         else: end_time = 0
 377
 378         rspecs = {}
 379         aggregates = Aggregates(self.api)
 380         credential = self.api.getCredential()
 381
 382         # split the netspecs into individual rspecs
 383         netspecs = spec.getDictsByTagName('NetSpec')
 384         for netspec in netspecs:
 385             net_hrn = netspec['name']
 386             resources = {'start_time': start_time, 'end_time': end_time, 'networks': netspec}
 387             resourceDict = {'Rspec': resources}
 388             tempspec.parseDict(resourceDict)
 389             rspecs[net_hrn] = tempspec.toxml()
 390
 391         # send each rspec to the appropriate aggregate/sm
 392         for net_hrn in rspecs:
 393             try:
 394                 # if we are directly connected to the aggregate then we can just send them the rspec
 395                 # if not, then we may be connected to an sm thats connected to the aggregate
 396                 if net_hrn in aggregates:
 397                     # send the whloe rspec to the local aggregate
 398                     if net_hrn in [self.api.hrn]:
 399                         aggregates[net_hrn].create_slice(credential, hrn, rspec, caller_cred=self.caller_cred)
 400                     else:
 401                         aggregates[net_hrn].create_slice(credential, hrn, rspecs[net_hrn], caller_cred=self.caller_cred)
 402                 else:
 403                     # lets forward this rspec to a sm that knows about the network
 404                     for aggregate in aggregates:
 405                         network_found = aggregates[aggregate].get_aggregates(credential, net_hrn)
 406                         if network_networks:
 407                             aggregates[aggregate].create_slice(credential, hrn, rspecs[net_hrn], caller_cred=self.caller_cred)
 408
 409             except:
 410                 print >> log, "Error creating slice %(hrn)s at aggregate %(net_hrn)s" % locals()
 411                 traceback.print_exc()
 412         return 1
 413
 414
 415     def start_slice(self, hrn):
 416         if self.api.interface in ['aggregate']:
 417             self.start_slice_aggregate(hrn)
 418         elif self.api.interface in ['slicemgr']:
 419             self.start_slice_smgr(hrn)
 420
 421     def start_slice_aggregate(self, hrn):
 422         slicename = hrn_to_pl_slicename(hrn)
 423         slices = self.api.plshell.GetSlices(self.api.plauth, {'name': slicename}, ['slice_id'])
 424         if not slices:
 425             raise RecordNotFound(hrn)
 426         slice_id = slices[0]
 427         attributes = self.api.plshell.GetSliceAttributes(self.api.plauth, {'slice_id': slice_id, 'name': 'enabled'}, ['slice_attribute_id'])
 428         attribute_id = attreibutes[0]['slice_attribute_id']
 429         self.api.plshell.UpdateSliceAttribute(self.api.plauth, attribute_id, "1" )
 430         return 1
 431
 432     def start_slice_smgr(self, hrn):
 433         credential = self.api.getCredential()
 434         aggregates = Aggregates(self.api)
 435         for aggregate in aggregates:
 436             aggregates[aggregate].start_slice(credential, hrn)
 437         return 1
 438
 439
 440     def stop_slice(self, hrn):
 441         if self.api.interface in ['aggregate']:
 442             self.stop_slice_aggregate(hrn)
 443         elif self.api.interface in ['slicemgr']:
 444             self.stop_slice_smgr(hrn)
 445
 446     def stop_slice_aggregate(self, hrn):
 447         slicename = hrn_to_pl_slicename(hrn)
 448         slices = self.api.plshell.GetSlices(self.api.plauth, {'name': slicename}, ['slice_id'])
 449         if not slices:
 450             raise RecordNotFound(hrn)
 451         slice_id = slices[0]['slice_id']
 452         attributes = self.api.plshell.GetSliceAttributes(self.api.plauth, {'slice_id': slice_id, 'name': 'enabled'}, ['slice_attribute_id'])
 453         attribute_id = attributes[0]['slice_attribute_id']
 454         self.api.plshell.UpdateSliceAttribute(self.api.plauth, attribute_id, "0")
 455         return 1
 456
 457     def stop_slice_smgr(self, hrn):
 458         credential = self.api.getCredential()
 459         aggregates = Aggregates(self.api)
 460         for aggregate in aggregates:
 461             aggregates[aggregate].stop_slice(credential, hrn)
 462