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