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