sfa/managers/slice_manager_pl.py

   1 #
   2 import sys
   3 import time,datetime
   4 from StringIO import StringIO
   5 from types import StringTypes
   6 from copy import deepcopy
   7 from copy import copy
   8 from lxml import etree
   9
  10 from sfa.util.sfalogging import sfa_logger
  11 from sfa.util.rspecHelper import merge_rspecs
  12 from sfa.util.xrn import Xrn, urn_to_hrn, hrn_to_urn
  13 from sfa.util.plxrn import hrn_to_pl_slicename
  14 from sfa.util.rspec import *
  15 from sfa.util.specdict import *
  16 from sfa.util.faults import *
  17 from sfa.util.record import SfaRecord
  18 from sfa.util.policy import Policy
  19 from sfa.util.prefixTree import prefixTree
  20 from sfa.util.sfaticket import *
  21 from sfa.trust.credential import Credential
  22 from sfa.util.threadmanager import ThreadManager
  23 import sfa.util.xmlrpcprotocol as xmlrpcprotocol
  24 import sfa.plc.peers as peers
  25 from sfa.util.version import version_core
  26 from sfa.util.callids import Callids
  27
  28 # XX FIX ME:  should merge result from multiple aggregates instead of
  29 # calling aggregate implementation
  30 from sfa.managers.aggregate_manager_pl import slice_status
  31
  32 # we have specialized xmlrpclib.ServerProxy to remember the input url
  33 # OTOH it's not clear if we're only dealing with XMLRPCServerProxy instances
  34 def get_serverproxy_url (server):
  35     try:
  36         return server.url
  37     except:
  38         sfa_logger().warning("GetVersion, falling back to xmlrpclib.ServerProxy internals")
  39         return server._ServerProxy__host + server._ServerProxy__handler
  40
  41 def GetVersion(api):
  42     # peers explicitly in aggregates.xml
  43     peers =dict ([ (peername,get_serverproxy_url(v)) for (peername,v) in api.aggregates.iteritems()
  44                    if peername != api.hrn])
  45     xrn=Xrn (api.hrn)
  46     sm_version=version_core({'interface':'slicemgr',
  47                              'hrn' : xrn.get_hrn(),
  48                              'urn' : xrn.get_urn(),
  49                              'peers': peers,
  50                              })
  51     # local aggregate if present needs to have localhost resolved
  52     if api.hrn in api.aggregates:
  53         local_am_url=get_serverproxy_url(api.aggregates[api.hrn])
  54         sm_version['peers'][api.hrn]=local_am_url.replace('localhost',sm_version['hostname'])
  55     return sm_version
  56
  57 def CreateSliver(api, xrn, creds, rspec, users, call_id):
  58
  59     if Callids().already_handled(call_id): return ""
  60
  61     hrn, type = urn_to_hrn(xrn)
  62
  63     # Validate the RSpec against PlanetLab's schema --disabled for now
  64     # The schema used here needs to aggregate the PL and VINI schemas
  65     # schema = "/var/www/html/schemas/pl.rng"
  66     schema = None
  67     if schema:
  68         try:
  69             tree = etree.parse(StringIO(rspec))
  70         except etree.XMLSyntaxError:
  71             message = str(sys.exc_info()[1])
  72             raise InvalidRSpec(message)
  73
  74         relaxng_doc = etree.parse(schema)
  75         relaxng = etree.RelaxNG(relaxng_doc)
  76
  77         if not relaxng(tree):
  78             error = relaxng.error_log.last_error
  79             message = "%s (line %s)" % (error.message, error.line)
  80             raise InvalidRSpec(message)
  81
  82     # get the callers hrn
  83     valid_cred = api.auth.checkCredentials(creds, 'createsliver', hrn)[0]
  84     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
  85
  86     # attempt to use delegated credential first
  87     credential = api.getDelegatedCredential(creds)
  88     if not credential:
  89         credential = api.getCredential()
  90     threads = ThreadManager()
  91     for aggregate in api.aggregates:
  92         # prevent infinite loop. Dont send request back to caller
  93         # unless the caller is the aggregate's SM
  94         if caller_hrn == aggregate and aggregate != api.hrn:
  95             continue
  96
  97         # Just send entire RSpec to each aggregate
  98         server = api.aggregates[aggregate]
  99         threads.run(server.CreateSliver, xrn, credential, rspec, users, call_id)
 100
 101     results = threads.get_results()
 102     merged_rspec = merge_rspecs(results)
 103     return merged_rspec
 104
 105 def renew_slice(api, xrn, creds, expiration_time):
 106     hrn, type = urn_to_hrn(xrn)
 107
 108     # get the callers hrn
 109     valid_cred = api.auth.checkCredentials(creds, 'renewsliver', hrn)[0]
 110     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 111
 112     # attempt to use delegated credential first
 113     credential = api.getDelegatedCredential(creds)
 114     if not credential:
 115         credential = api.getCredential()
 116     threads = ThreadManager()
 117     for aggregate in api.aggregates:
 118         # prevent infinite loop. Dont send request back to caller
 119         # unless the caller is the aggregate's SM
 120         if caller_hrn == aggregate and aggregate != api.hrn:
 121             continue
 122
 123         server = api.aggregates[aggregate]
 124         threads.run(server.RenewSliver, xrn, [credential], expiration_time)
 125     threads.get_results()
 126     return 1
 127
 128 def get_ticket(api, xrn, creds, rspec, users):
 129     slice_hrn, type = urn_to_hrn(xrn)
 130     # get the netspecs contained within the clients rspec
 131     aggregate_rspecs = {}
 132     tree= etree.parse(StringIO(rspec))
 133     elements = tree.findall('./network')
 134     for element in elements:
 135         aggregate_hrn = element.values()[0]
 136         aggregate_rspecs[aggregate_hrn] = rspec
 137
 138     # get the callers hrn
 139     valid_cred = api.auth.checkCredentials(creds, 'getticket', slice_hrn)[0]
 140     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 141
 142     # attempt to use delegated credential first
 143     credential = api.getDelegatedCredential(creds)
 144     if not credential:
 145         credential = api.getCredential()
 146     threads = ThreadManager()
 147     for (aggregate, aggregate_rspec) in aggregate_rspecs.iteritems():
 148         # prevent infinite loop. Dont send request back to caller
 149         # unless the caller is the aggregate's SM
 150         if caller_hrn == aggregate and aggregate != api.hrn:
 151             continue
 152         server = None
 153         if aggregate in api.aggregates:
 154             server = api.aggregates[aggregate]
 155         else:
 156             net_urn = hrn_to_urn(aggregate, 'authority')
 157             # we may have a peer that knows about this aggregate
 158             for agg in api.aggregates:
 159                 target_aggs = api.aggregates[agg].get_aggregates(credential, net_urn)
 160                 if not target_aggs or not 'hrn' in target_aggs[0]:
 161                     continue
 162                 # send the request to this address
 163                 url = target_aggs[0]['url']
 164                 server = xmlrpcprotocol.get_server(url, api.key_file, api.cert_file)
 165                 # aggregate found, no need to keep looping
 166                 break
 167         if server is None:
 168             continue
 169         threads.run(server.GetTicket, xrn, credential, aggregate_rspec, users)
 170
 171     results = threads.get_results()
 172
 173     # gather information from each ticket
 174     rspecs = []
 175     initscripts = []
 176     slivers = []
 177     object_gid = None
 178     for result in results:
 179         agg_ticket = SfaTicket(string=result)
 180         attrs = agg_ticket.get_attributes()
 181         if not object_gid:
 182             object_gid = agg_ticket.get_gid_object()
 183         rspecs.append(agg_ticket.get_rspec())
 184         initscripts.extend(attrs.get('initscripts', []))
 185         slivers.extend(attrs.get('slivers', []))
 186
 187     # merge info
 188     attributes = {'initscripts': initscripts,
 189                  'slivers': slivers}
 190     merged_rspec = merge_rspecs(rspecs)
 191
 192     # create a new ticket
 193     ticket = SfaTicket(subject = slice_hrn)
 194     ticket.set_gid_caller(api.auth.client_gid)
 195     ticket.set_issuer(key=api.key, subject=api.hrn)
 196     ticket.set_gid_object(object_gid)
 197     ticket.set_pubkey(object_gid.get_pubkey())
 198     #new_ticket.set_parent(api.auth.hierarchy.get_auth_ticket(auth_hrn))
 199     ticket.set_attributes(attributes)
 200     ticket.set_rspec(merged_rspec)
 201     ticket.encode()
 202     ticket.sign()
 203     return ticket.save_to_string(save_parents=True)
 204
 205
 206 def delete_slice(api, xrn, creds):
 207     hrn, type = urn_to_hrn(xrn)
 208
 209     # get the callers hrn
 210     valid_cred = api.auth.checkCredentials(creds, 'deletesliver', hrn)[0]
 211     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 212
 213     # attempt to use delegated credential first
 214     credential = api.getDelegatedCredential(creds)
 215     if not credential:
 216         credential = api.getCredential()
 217     threads = ThreadManager()
 218     for aggregate in api.aggregates:
 219         # prevent infinite loop. Dont send request back to caller
 220         # unless the caller is the aggregate's SM
 221         if caller_hrn == aggregate and aggregate != api.hrn:
 222             continue
 223         server = api.aggregates[aggregate]
 224         threads.run(server.DeleteSliver, xrn, credential)
 225     threads.get_results()
 226     return 1
 227
 228 def start_slice(api, xrn, creds):
 229     hrn, type = urn_to_hrn(xrn)
 230
 231     # get the callers hrn
 232     valid_cred = api.auth.checkCredentials(creds, 'startslice', hrn)[0]
 233     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 234
 235     # attempt to use delegated credential first
 236     credential = api.getDelegatedCredential(creds)
 237     if not credential:
 238         credential = api.getCredential()
 239     threads = ThreadManager()
 240     for aggregate in api.aggregates:
 241         # prevent infinite loop. Dont send request back to caller
 242         # unless the caller is the aggregate's SM
 243         if caller_hrn == aggregate and aggregate != api.hrn:
 244             continue
 245         server = api.aggregates[aggregate]
 246         threads.run(server.Start, xrn, credential)
 247     threads.get_results()
 248     return 1
 249
 250 def stop_slice(api, xrn, creds):
 251     hrn, type = urn_to_hrn(xrn)
 252
 253     # get the callers hrn
 254     valid_cred = api.auth.checkCredentials(creds, 'stopslice', hrn)[0]
 255     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 256
 257     # attempt to use delegated credential first
 258     credential = api.getDelegatedCredential(creds)
 259     if not credential:
 260         credential = api.getCredential()
 261     threads = ThreadManager()
 262     for aggregate in api.aggregates:
 263         # prevent infinite loop. Dont send request back to caller
 264         # unless the caller is the aggregate's SM
 265         if caller_hrn == aggregate and aggregate != api.hrn:
 266             continue
 267         server = api.aggregates[aggregate]
 268         threads.run(server.Stop, xrn, credential)
 269     threads.get_results()
 270     return 1
 271
 272 def reset_slice(api, xrn):
 273     """
 274     Not implemented
 275     """
 276     return 1
 277
 278 def shutdown(api, xrn, creds):
 279     """
 280     Not implemented
 281     """
 282     return 1
 283
 284 def status(api, xrn, creds):
 285     """
 286     Not implemented
 287     """
 288     return 1
 289
 290 def get_slices(api, creds):
 291
 292     # look in cache first
 293     if api.cache:
 294         slices = api.cache.get('slices')
 295         if slices:
 296             return slices
 297
 298     # get the callers hrn
 299     valid_cred = api.auth.checkCredentials(creds, 'listslices', None)[0]
 300     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 301
 302     # attempt to use delegated credential first
 303     credential = api.getDelegatedCredential(creds)
 304     if not credential:
 305         credential = api.getCredential()
 306     threads = ThreadManager()
 307     # fetch from aggregates
 308     for aggregate in api.aggregates:
 309         # prevent infinite loop. Dont send request back to caller
 310         # unless the caller is the aggregate's SM
 311         if caller_hrn == aggregate and aggregate != api.hrn:
 312             continue
 313         server = api.aggregates[aggregate]
 314         threads.run(server.ListSlices, credential)
 315
 316     # combime results
 317     results = threads.get_results()
 318     slices = []
 319     for result in results:
 320         slices.extend(result)
 321
 322     # cache the result
 323     if api.cache:
 324         api.cache.add('slices', slices)
 325
 326     return slices
 327
 328
 329 # Thierry : caching at the slicemgr level makes sense to some extent
 330 caching=True
 331 #caching=False
 332 def ListResources(api, creds, options, call_id):
 333
 334     if Callids().already_handled(call_id):
 335         api.logger.info("%d received ListResources with known call_id %s"%(api.interface,call_id))
 336         return ""
 337
 338     # get slice's hrn from options
 339     xrn = options.get('geni_slice_urn', '')
 340     (hrn, type) = urn_to_hrn(xrn)
 341
 342     # get hrn of the original caller
 343     origin_hrn = options.get('origin_hrn', None)
 344     if not origin_hrn:
 345         if isinstance(creds, list):
 346             origin_hrn = Credential(string=creds[0]).get_gid_caller().get_hrn()
 347         else:
 348             origin_hrn = Credential(string=creds).get_gid_caller().get_hrn()
 349
 350     # look in cache first
 351     if caching and api.cache and not xrn:
 352         rspec =  api.cache.get('nodes')
 353         if rspec:
 354             return rspec
 355
 356     # get the callers hrn
 357     valid_cred = api.auth.checkCredentials(creds, 'listnodes', hrn)[0]
 358     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 359
 360     # attempt to use delegated credential first
 361     credential = api.getDelegatedCredential(creds)
 362     if not credential:
 363         credential = api.getCredential()
 364     threads = ThreadManager()
 365     for aggregate in api.aggregates:
 366         # prevent infinite loop. Dont send request back to caller
 367         # unless the caller is the aggregate's SM
 368         if caller_hrn == aggregate and aggregate != api.hrn:
 369             continue
 370         # get the rspec from the aggregate
 371         server = api.aggregates[aggregate]
 372         my_opts = copy(options)
 373         my_opts['geni_compressed'] = False
 374         threads.run(server.ListResources, credential, my_opts, call_id)
 375         #threads.run(server.get_resources, cred, xrn, origin_hrn)
 376
 377     results = threads.get_results()
 378     merged_rspec = merge_rspecs(results)
 379
 380     # cache the result
 381     if caching and api.cache and not xrn:
 382         api.cache.add('nodes', merged_rspec)
 383
 384     return merged_rspec
 385
 386 def main():
 387     r = RSpec()
 388     r.parseFile(sys.argv[1])
 389     rspec = r.toDict()
 390     CreateSliver(None,'plc.princeton.tmacktestslice',rspec,'create-slice-tmacktestslice')
 391
 392 if __name__ == "__main__":
 393     main()
 394