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         # check our slice policy before we procede
 113         whitelist = self.policy['slice_whitelist']
 114         blacklist = self.policy['slice_blacklist']
 115
 116         if whitelist and hrn not in whitelist or \
 117            blacklist and hrn in blacklist:
 118             policy_file = self.policy.policy_file
 119             print >> log, "Slice %(hrn)s not allowed by policy %(policy_file)s" % locals()
 120             return 1
 121         if self.api.interface in ['aggregate']:
 122             self.create_slice_aggregate(hrn, rspec)
 123         elif self.api.interface in ['slicemgr']:
 124             self.create_slice_smgr(hrn, rspec)
 125
 126     def create_slice_aggregate(self, hrn, rspec, peer = None):
 127         spec = Rspec(rspec)
 128         # Get the slice record from geni
 129         slice = {}
 130         registries = Registries(self.api)
 131         registry = registries[self.api.hrn]
 132         credential = self.api.getCredential()
 133         records = registry.resolve(credential, hrn)
 134         for record in records:
 135             if record.get_type() in ['slice']:
 136                 slice_record = record.as_dict()
 137         if not slice_record:
 138             raise RecordNotFound(hrn)
 139
 140         # Make sure slice exists at plc, if it doesnt add it
 141         slicename = hrn_to_pl_slicename(hrn)
 142         slices = self.api.plshell.GetSlices(self.api.plauth, [slicename], ['node_ids'])
 143         if not slices:
 144             parts = slicename.split("_")
 145             login_base = parts[0]
 146             # if site doesnt exist add it
 147             sites = self.api.plshell.GetSites(self.api.plauth, [login_base])
 148             if not sites:
 149                 authority = get_authority(hrn)
 150                 site_records = registry.resolve(credential, authority)
 151                 site_record = {}
 152                 if not site_records:
 153                     raise RecordNotFound(authority)
 154                 site_record = site_records[0]
 155                 site = site_record.as_dict()
 156
 157                  # add the site
 158                 remote_site_id = site.pop('site_id')
 159                 site_id = self.api.plshell.AddSite(self.api.plauth, site)
 160                 # this belongs to a peer
 161                 if peer:
 162                     self.api.plshell.BindObjectToPeer(self.api.plauth, 'site', site_id, peer, remote_site_id)
 163             else:
 164                 site = sites[0]
 165
 166             # create slice object
 167             slice_fields = {}
 168             slice_keys = ['name', 'url', 'description']
 169             for key in slice_keys:
 170                 if key in slice and slice[key]:
 171                     slice_fields[key] = slice[key]
 172
 173             # add the slice
 174             slice_id = self.api.plshell.AddSlice(self.api.plauth, slice_fields)
 175             slice = slice_fields
 176             #this belongs to a peer
 177             if peer:
 178                 self.api.plshell.BindObjectToPeer(self.api.plauth, 'slice', slice_id, peer, slice_record['pointer'])
 179             slice['node_ids'] = 0
 180         else:
 181             slice = slices[0]
 182         # get the list of valid slice users from the registry and make
 183         # they are added to the slice
 184         researchers = record.get('researcher', [])
 185         for researcher in researchers:
 186             person_record = {}
 187             person_records = registry.resolve(credential, researcher)
 188             for record in person_records:
 189                 if record.get_type() in ['user']:
 190                     person_record = record
 191             if not person_record:
 192                 pass
 193             person_dict = person_record.as_dict()
 194             persons = self.api.plshell.GetPersons(self.api.plauth, [person_dict['email']], ['person_id', 'key_ids'])
 195
 196             # Create the person record
 197             if not persons:
 198                 person_id=self.api.plshell.AddPerson(self.api.plauth, person_dict)
 199
 200                 # The line below enables the user account on the remote
 201                 # aggregate soon after it is created. without this the
 202                 # user key is not transfered to the slice (as GetSlivers
 203                 # returns key of only enabled users), which prevents the
 204                 # user from login to the slice. We may do additional checks
 205                 # before enabling the user.
 206
 207                 self.api.plshell.UpdatePerson(self.api.plauth, person_id, {'enabled' : True})
 208                 if peer:
 209                     self.api.plshell.BindObjectToPeer(self.api.plauth, 'person', person_id, peer, person_record['pointer'])
 210                 key_ids = []
 211             else:
 212                 key_ids = persons[0]['key_ids']
 213
 214             self.api.plshell.AddPersonToSlice(self.api.plauth, person_dict['email'], slicename)
 215             # Get this users local keys
 216             keylist = self.api.plshell.GetKeys(self.api.plauth, key_ids, ['key'])
 217             keys = [key['key'] for key in keylist]
 218
 219             # add keys that arent already there
 220             for personkey in person_dict['keys']:
 221                 if personkey not in keys:
 222                     key = {'key_type': 'ssh', 'key': personkey}
 223                     if peer:
 224                         # XX Need to get the key_id from remote registry somehow
 225                         #self.api.plshell.BindObjectToPeer(self.api.plauth, 'key', None, peer, key_id)
 226                         pass
 227                     else:
 228                         self.api.plshell.AddPersonKey(self.api.plauth, person_dict['email'], key)
 229
 230         # find out where this slice is currently running
 231         nodelist = self.api.plshell.GetNodes(self.api.plauth, slice['node_ids'], ['hostname'])
 232         hostnames = [node['hostname'] for node in nodelist]
 233
 234         # get netspec details
 235         nodespecs = spec.getDictsByTagName('NodeSpec')
 236         nodes = []
 237         for nodespec in nodespecs:
 238             if isinstance(nodespec['name'], list):
 239                 nodes.extend(nodespec['name'])
 240             elif isinstance(nodespec['name'], StringTypes):
 241                 nodes.append(nodespec['name'])
 242
 243         # remove nodes not in rspec
 244         deleted_nodes = list(set(hostnames).difference(nodes))
 245         # add nodes from rspec
 246         added_nodes = list(set(nodes).difference(hostnames))
 247
 248         self.api.plshell.AddSliceToNodes(self.api.plauth, slicename, added_nodes)
 249         self.api.plshell.DeleteSliceFromNodes(self.api.plauth, slicename, deleted_nodes)
 250
 251         return 1
 252
 253     def create_slice_smgr(self, hrn, rspec):
 254         spec = Rspec()
 255         tempspec = Rspec()
 256         spec.parseString(rspec)
 257         slicename = hrn_to_pl_slicename(hrn)
 258         specDict = spec.toDict()
 259         if specDict.has_key('Rspec'): specDict = specDict['Rspec']
 260         if specDict.has_key('start_time'): start_time = specDict['start_time']
 261         else: start_time = 0
 262         if specDict.has_key('end_time'): end_time = specDict['end_time']
 263         else: end_time = 0
 264
 265         rspecs = {}
 266         aggregates = Aggregates(self.api)
 267         credential = self.api.getCredential()
 268         # only attempt to extract information about the aggregates we know about
 269         for aggregate in aggregates:
 270             netspec = spec.getDictByTagNameValue('NetSpec', aggregate)
 271             if netspec:
 272                 # creat a plc dict
 273                 resources = {'start_time': start_time, 'end_time': end_time, 'networks': netspec}
 274                 resourceDict = {'Rspec': resources}
 275                 tempspec.parseDict(resourceDict)
 276                 rspecs[aggregate] = tempspec.toxml()
 277
 278         # notify the aggregates
 279         for aggregate in rspecs.keys():
 280             # we are already federated with this aggregate using plc federation,
 281             # we must pass our peer name to that aggregate so they can call BindObjectToPeer
 282             local_peer_name = None
 283             peers = self.api.plshell.GetPeers(self.api.plauth, {}, ['peername', 'shortname', 'hrn_root'])
 284             for peer in peers:
 285                 names = peer.values()
 286                 if aggregate in names:
 287                     local_peer_name = self.api.hrn
 288
 289             try:
 290                 # send the whloe rspec to the local aggregate
 291                 if aggregate in [self.api.hrn]:
 292                     aggregates[aggregate].create_slice(credential, hrn, rspec, local_peer_name)
 293                 else:
 294                     aggregates[aggregate].create_slice(credential, hrn, rspecs[aggregate], local_peer_name)
 295             except:
 296                 print >> log, "Error creating slice %(hrn)s at aggregate %(aggregate)s" % locals()
 297         return 1
 298
 299
 300     def start_slice(self, hrn):
 301         if self.api.interface in ['aggregate']:
 302             self.start_slice_aggregate(hrn)
 303         elif self.api.interface in ['slicemgr']:
 304             self.start_slice_smgr(hrn)
 305
 306     def start_slice_aggregate(self, hrn):
 307         slicename = hrn_to_pl_slicename(hrn)
 308         slices = self.api.plshell.GetSlices(self.api.plauth, {'name': slicename}, ['slice_id'])
 309         if not slices:
 310             raise RecordNotFound(hrn)
 311         slice_id = slices[0]
 312         attributes = self.api.plshell.GetSliceAttributes(self.api.plauth, {'slice_id': slice_id, 'name': 'enabled'}, ['slice_attribute_id'])
 313         attribute_id = attreibutes[0]['slice_attribute_id']
 314         self.api.plshell.UpdateSliceAttribute(self.api.plauth, attribute_id, "1" )
 315         return 1
 316
 317     def start_slice_smgr(self, hrn):
 318         credential = self.api.getCredential()
 319         aggregates = Aggregates(self.api)
 320         for aggregate in aggregates:
 321             aggregates[aggregate].start_slice(credential, hrn)
 322         return 1
 323
 324
 325     def stop_slice(self, hrn):
 326         if self.api.interface in ['aggregate']:
 327             self.stop_slice_aggregate(hrn)
 328         elif self.api.interface in ['slicemgr']:
 329             self.stop_slice_smgr(hrn)
 330
 331     def stop_slice_aggregate(self, hrn):
 332         slicename = hrn_to_pl_slicename(hrn)
 333         slices = self.api.plshell.GetSlices(self.api.plauth, {'name': slicename}, ['slice_id'])
 334         if not slices:
 335             raise RecordNotFound(hrn)
 336         slice_id = slices[0]['slice_id']
 337         attributes = self.api.plshell.GetSliceAttributes(self.api.plauth, {'slice_id': slice_id, 'name': 'enabled'}, ['slice_attribute_id'])
 338         attribute_id = attributes[0]['slice_attribute_id']
 339         self.api.plshell.UpdateSliceAttribute(self.api.plauth, attribute_id, "0")
 340         return 1
 341
 342     def stop_slice_smgr(self, hrn):
 343         credential = self.api.getCredential()
 344         aggregates = Aggregates(self.api)
 345         for aggregate in aggregates:
 346             aggregates[aggregate].stop_slice(credential, hrn)
 347