sfa/plc/slices.py

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