sfa/util/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.basepath
  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                 self.api.plshell.AddPerson(self.api.plauth, person_dict)
 190                 key_ids = []
 191             else:
 192                 key_ids = persons[0]['key_ids']
 193
 194             self.api.plshell.AddPersonToSlice(self.api.plauth, person_dict['email'], slicename)
 195
 196             # Get this users local keys
 197             keylist = self.api.plshell.GetKeys(self.api.plauth, key_ids, ['key'])
 198             keys = [key['key'] for key in keylist]
 199
 200             # add keys that arent already there
 201             for personkey in person_dict['keys']:
 202                 if personkey not in keys:
 203                     key = {'key_type': 'ssh', 'key': personkey}
 204                     self.api.plshell.AddPersonKey(self.api.plauth, person_dict['email'], key)
 205
 206         # find out where this slice is currently running
 207         nodelist = self.api.plshell.GetNodes(self.api.plauth, slice['node_ids'], ['hostname'])
 208         hostnames = [node['hostname'] for node in nodelist]
 209
 210         # get netspec details
 211         nodespecs = spec.getDictsByTagName('NodeSpec')
 212         nodes = []
 213         for nodespec in nodespecs:
 214             if isinstance(nodespec['name'], list):
 215                 nodes.extend(nodespec['name'])
 216             elif isinstance(nodespec['name'], StringTypes):
 217                 nodes.append(nodespec['name'])
 218
 219         # remove nodes not in rspec
 220         deleted_nodes = list(set(hostnames).difference(nodes))
 221         # add nodes from rspec
 222         added_nodes = list(set(nodes).difference(hostnames))
 223
 224         self.api.plshell.AddSliceToNodes(self.api.plauth, slicename, added_nodes)
 225         self.api.plshell.DeleteSliceFromNodes(self.api.plauth, slicename, deleted_nodes)
 226
 227         return 1
 228
 229     def create_slice_smgr(self, hrn, rspec):
 230         spec = Rspec()
 231         tempspec = Rspec()
 232         spec.parseString(rspec)
 233         slicename = hrn_to_pl_slicename(hrn)
 234         specDict = spec.toDict()
 235         if specDict.has_key('Rspec'): specDict = specDict['Rspec']
 236         if specDict.has_key('start_time'): start_time = specDict['start_time']
 237         else: start_time = 0
 238         if specDict.has_key('end_time'): end_time = specDict['end_time']
 239         else: end_time = 0
 240
 241         rspecs = {}
 242         aggregates = Aggregates(self.api)
 243         credential = self.api.getCredential()
 244         # only attempt to extract information about the aggregates we know about
 245         for aggregate in aggregates:
 246             netspec = spec.getDictByTagNameValue('NetSpec', aggregate)
 247             if netspec:
 248                 # creat a plc dict
 249                 resources = {'start_time': start_time, 'end_time': end_time, 'networks': netspec}
 250                 resourceDict = {'Rspec': resources}
 251                 tempspec.parseDict(resourceDict)
 252                 rspecs[aggregate] = tempspec.toxml()
 253
 254         # notify the aggregates
 255         for aggregate in rspecs.keys():
 256             try:
 257                 aggregates[aggregate].create_slice(credential, hrn, rspecs[aggregate])
 258             except:
 259                 print >> log, "Error creating slice %(hrn)s at aggregate %(aggregate)s" % locals()
 260         return 1
 261
 262
 263     def start_slice(self, hrn):
 264         if self.api.interface in ['aggregate']:
 265             self.start_slice_aggregate(hrn)
 266         elif self.api.interface in ['slicemgr']:
 267             self.start_slice_smgr(hrn)
 268
 269     def start_slice_aggregate(self, hrn):
 270         slicename = hrn_to_pl_slicename(hrn)
 271         slices = self.api.plshell.GetSlices(self.api.plauth, {'name': slicename}, ['slice_id'])
 272         if not slices:
 273             raise RecordNotFound(hrn)
 274         slice_id = slices[0]
 275         attributes = self.api.plshell.GetSliceAttributes(self.api.plauth, {'slice_id': slice_id, 'name': 'enabled'}, ['slice_attribute_id'])
 276         attribute_id = attreibutes[0]['slice_attribute_id']
 277         self.api.plshell.UpdateSliceAttribute(self.api.plauth, attribute_id, "1" )
 278         return 1
 279
 280     def start_slice_smgr(self, hrn):
 281         credential = self.api.getCredential()
 282         aggregates = Aggregates(self.api)
 283         for aggregate in aggregates:
 284             aggregates[aggregate].start_slice(credential, hrn)
 285         return 1
 286
 287
 288     def stop_slice(self, hrn):
 289         if self.api.interface in ['aggregate']:
 290             self.stop_slice_aggregate(hrn)
 291         elif self.api.interface in ['slicemgr']:
 292             self.stop_slice_smgr(hrn)
 293
 294     def stop_slice_aggregate(self, hrn):
 295         slicename = hrn_to_pl_slicename(hrn)
 296         slices = self.api.plshell.GetSlices(self.api.plauth, {'name': slicename}, ['slice_id'])
 297         if not slices:
 298             raise RecordNotFound(hrn)
 299         slice_id = slices[0]['slice_id']
 300         attributes = self.api.plshell.GetSliceAttributes(self.api.plauth, {'slice_id': slice_id, 'name': 'enabled'}, ['slice_attribute_id'])
 301         attribute_id = attributes[0]['slice_attribute_id']
 302         self.api.plshell.UpdateSliceAttribute(self.api.plauth, attribute_id, "0")
 303         return 1
 304
 305     def stop_slice_smgr(self, hrn):
 306         credential = self.api.getCredential()
 307         aggregates = Aggregates(self.api)
 308         for aggregate in aggregates:
 309             aggregates[aggregate].stop_slice(credential, hrn)
 310