sfa/plc/slices.py

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