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):
 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.as_dict()
 137         if not slice:
 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                 site.pop('site_id')
 159                 site_id = self.api.plshell.AddSite(self.api.plauth, site)
 160             else:
 161                 site = sites[0]
 162
 163             slice_fields = {}
 164             slice_keys = ['name', 'url', 'description']
 165             for key in slice_keys:
 166                 if key in slice and slice[key]:
 167                     slice_fields[key] = slice[key]
 168             self.api.plshell.AddSlice(self.api.plauth, slice_fields)
 169             slice = slice_fields
 170             slice['node_ids'] = 0
 171         else:
 172             slice = slices[0]
 173         # get the list of valid slice users from the registry and make
 174         # they are added to the slice
 175         researchers = record.get('researcher', [])
 176         for researcher in researchers:
 177             person_record = {}
 178             person_records = registry.resolve(credential, researcher)
 179             for record in person_records:
 180                 if record.get_type() in ['user']:
 181                     person_record = record
 182             if not person_record:
 183                 pass
 184             person_dict = person_record.as_dict()
 185             persons = self.api.plshell.GetPersons(self.api.plauth, [person_dict['email']], ['person_id', 'key_ids'])
 186
 187             # Create the person record
 188             if not persons:
 189                 person_id=self.api.plshell.AddPerson(self.api.plauth, person_dict)
 190
 191                 # The line below enables the user account on the remote aggregate soon after it is created.
 192                 # without this the user key is not transfered to the slice (as GetSlivers returns key of only enabled users),
 193                 # which prevents the user from login to the slice. We may do additional checks before enabling the user.
 194
 195                 self.api.plshell.UpdatePerson(self.api.plauth, person_id, {'enabled' : True})
 196                 key_ids = []
 197             else:
 198                 key_ids = persons[0]['key_ids']
 199
 200             self.api.plshell.AddPersonToSlice(self.api.plauth, person_dict['email'], slicename)
 201
 202             # Get this users local keys
 203             keylist = self.api.plshell.GetKeys(self.api.plauth, key_ids, ['key'])
 204             keys = [key['key'] for key in keylist]
 205
 206             # add keys that arent already there
 207             for personkey in person_dict['keys']:
 208                 if personkey not in keys:
 209                     key = {'key_type': 'ssh', 'key': personkey}
 210                     self.api.plshell.AddPersonKey(self.api.plauth, person_dict['email'], key)
 211
 212         # find out where this slice is currently running
 213         nodelist = self.api.plshell.GetNodes(self.api.plauth, slice['node_ids'], ['hostname'])
 214         hostnames = [node['hostname'] for node in nodelist]
 215
 216         # get netspec details
 217         nodespecs = spec.getDictsByTagName('NodeSpec')
 218         nodes = []
 219         for nodespec in nodespecs:
 220             if isinstance(nodespec['name'], list):
 221                 nodes.extend(nodespec['name'])
 222             elif isinstance(nodespec['name'], StringTypes):
 223                 nodes.append(nodespec['name'])
 224
 225         # remove nodes not in rspec
 226         deleted_nodes = list(set(hostnames).difference(nodes))
 227         # add nodes from rspec
 228         added_nodes = list(set(nodes).difference(hostnames))
 229
 230         self.api.plshell.AddSliceToNodes(self.api.plauth, slicename, added_nodes)
 231         self.api.plshell.DeleteSliceFromNodes(self.api.plauth, slicename, deleted_nodes)
 232
 233         return 1
 234
 235     def create_slice_smgr(self, hrn, rspec):
 236         spec = Rspec()
 237         tempspec = Rspec()
 238         spec.parseString(rspec)
 239         slicename = hrn_to_pl_slicename(hrn)
 240         specDict = spec.toDict()
 241         if specDict.has_key('Rspec'): specDict = specDict['Rspec']
 242         if specDict.has_key('start_time'): start_time = specDict['start_time']
 243         else: start_time = 0
 244         if specDict.has_key('end_time'): end_time = specDict['end_time']
 245         else: end_time = 0
 246
 247         rspecs = {}
 248         aggregates = Aggregates(self.api)
 249         credential = self.api.getCredential()
 250         # only attempt to extract information about the aggregates we know about
 251         for aggregate in aggregates:
 252             netspec = spec.getDictByTagNameValue('NetSpec', aggregate)
 253             if netspec:
 254                 # creat a plc dict
 255                 resources = {'start_time': start_time, 'end_time': end_time, 'networks': netspec}
 256                 resourceDict = {'Rspec': resources}
 257                 tempspec.parseDict(resourceDict)
 258                 rspecs[aggregate] = tempspec.toxml()
 259
 260         # notify the aggregates
 261         for aggregate in rspecs.keys():
 262             try:
 263                 aggregates[aggregate].create_slice(credential, hrn, rspecs[aggregate])
 264             except:
 265                 print >> log, "Error creating slice %(hrn)s at aggregate %(aggregate)s" % locals()
 266         return 1
 267
 268
 269     def start_slice(self, hrn):
 270         if self.api.interface in ['aggregate']:
 271             self.start_slice_aggregate(hrn)
 272         elif self.api.interface in ['slicemgr']:
 273             self.start_slice_smgr(hrn)
 274
 275     def start_slice_aggregate(self, hrn):
 276         slicename = hrn_to_pl_slicename(hrn)
 277         slices = self.api.plshell.GetSlices(self.api.plauth, {'name': slicename}, ['slice_id'])
 278         if not slices:
 279             raise RecordNotFound(hrn)
 280         slice_id = slices[0]
 281         attributes = self.api.plshell.GetSliceAttributes(self.api.plauth, {'slice_id': slice_id, 'name': 'enabled'}, ['slice_attribute_id'])
 282         attribute_id = attreibutes[0]['slice_attribute_id']
 283         self.api.plshell.UpdateSliceAttribute(self.api.plauth, attribute_id, "1" )
 284         return 1
 285
 286     def start_slice_smgr(self, hrn):
 287         credential = self.api.getCredential()
 288         aggregates = Aggregates(self.api)
 289         for aggregate in aggregates:
 290             aggregates[aggregate].start_slice(credential, hrn)
 291         return 1
 292
 293
 294     def stop_slice(self, hrn):
 295         if self.api.interface in ['aggregate']:
 296             self.stop_slice_aggregate(hrn)
 297         elif self.api.interface in ['slicemgr']:
 298             self.stop_slice_smgr(hrn)
 299
 300     def stop_slice_aggregate(self, hrn):
 301         slicename = hrn_to_pl_slicename(hrn)
 302         slices = self.api.plshell.GetSlices(self.api.plauth, {'name': slicename}, ['slice_id'])
 303         if not slices:
 304             raise RecordNotFound(hrn)
 305         slice_id = slices[0]['slice_id']
 306         attributes = self.api.plshell.GetSliceAttributes(self.api.plauth, {'slice_id': slice_id, 'name': 'enabled'}, ['slice_attribute_id'])
 307         attribute_id = attributes[0]['slice_attribute_id']
 308         self.api.plshell.UpdateSliceAttribute(self.api.plauth, attribute_id, "0")
 309         return 1
 310
 311     def stop_slice_smgr(self, hrn):
 312         credential = self.api.getCredential()
 313         aggregates = Aggregates(self.api)
 314         for aggregate in aggregates:
 315             aggregates[aggregate].stop_slice(credential, hrn)
 316