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 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.rspecs.pg_rspec import PGRSpec
  19 from sfa.rspecs.sfa_rspec import SfaRSpec
  20 from sfa.rspecs.rspec_converter import RSpecConverter
  21 from sfa.rspecs.rspec_parser import parse_rspec
  22 from sfa.rspecs.rspec_version import RSpecVersion
  23 from sfa.rspecs.sfa_rspec import sfa_rspec_version
  24 from sfa.rspecs.pg_rspec import pg_rspec_ad_version, pg_rspec_request_version
  25 from sfa.util.policy import Policy
  26 from sfa.util.prefixTree import prefixTree
  27 from sfa.util.sfaticket import *
  28 from sfa.trust.credential import Credential
  29 from sfa.util.threadmanager import ThreadManager
  30 import sfa.util.xmlrpcprotocol as xmlrpcprotocol
  31 import sfa.plc.peers as peers
  32 from sfa.util.version import version_core
  33 from sfa.util.callids import Callids
  34
  35
  36 def _call_id_supported(api, server):
  37     """
  38     Returns true if server support the optional call_id arg, false otherwise.
  39     """
  40     server_version = api.get_cached_server_version(server)
  41
  42     if 'sfa' in server_version:
  43         code_tag = server_version['code_tag']
  44         code_tag_parts = code_tag.split("-")
  45
  46         version_parts = code_tag_parts[0].split(".")
  47         major, minor = version_parts[0], version_parts[1]
  48         rev = code_tag_parts[1]
  49         if int(major) > 1:
  50             if int(minor) > 0 or int(rev) > 20:
  51                 return True
  52     return False
  53
  54 # we have specialized xmlrpclib.ServerProxy to remember the input url
  55 # OTOH it's not clear if we're only dealing with XMLRPCServerProxy instances
  56 def get_serverproxy_url (server):
  57     try:
  58         return server.url
  59     except:
  60         logger.warning("GetVersion, falling back to xmlrpclib.ServerProxy internals")
  61         return server._ServerProxy__host + server._ServerProxy__handler
  62
  63 def GetVersion(api):
  64     # peers explicitly in aggregates.xml
  65     peers =dict ([ (peername,get_serverproxy_url(v)) for (peername,v) in api.aggregates.iteritems()
  66                    if peername != api.hrn])
  67     xrn=Xrn (api.hrn)
  68     request_rspec_versions = [dict(pg_rspec_request_version), dict(sfa_rspec_version)]
  69     ad_rspec_versions = [dict(pg_rspec_ad_version), dict(sfa_rspec_version)]
  70     version_more = {'interface':'slicemgr',
  71                     'hrn' : xrn.get_hrn(),
  72                     'urn' : xrn.get_urn(),
  73                     'peers': peers,
  74                     'request_rspec_versions': request_rspec_versions,
  75                     'ad_rspec_versions': ad_rspec_versions,
  76                     'default_ad_rspec': dict(sfa_rspec_version)
  77                     }
  78     sm_version=version_core(version_more)
  79     # local aggregate if present needs to have localhost resolved
  80     if api.hrn in api.aggregates:
  81         local_am_url=get_serverproxy_url(api.aggregates[api.hrn])
  82         sm_version['peers'][api.hrn]=local_am_url.replace('localhost',sm_version['hostname'])
  83     return sm_version
  84
  85
  86 def ListResources(api, creds, options, call_id):
  87     def _ListResources(server, credential, my_opts, call_id):
  88         args = [credential, my_opts]
  89         if _call_id_supported(api, server):
  90             args.append(call_id)
  91         try:
  92             return server.ListResources(*args)
  93         except Exception, e:
  94             api.logger.warn("ListResources failed at %s: %s" %(server.url, str(e)))
  95
  96     if Callids().already_handled(call_id): return ""
  97
  98     # get slice's hrn from options
  99     xrn = options.get('geni_slice_urn', '')
 100     (hrn, type) = urn_to_hrn(xrn)
 101     my_opts = copy(options)
 102     my_opts['geni_compressed'] = False
 103     if 'rspec_version' in my_opts:
 104         del my_opts['rspec_version']
 105
 106     # get the rspec's return format from options
 107     rspec_version = RSpecVersion(options.get('rspec_version'))
 108     version_string = "rspec_%s" % (rspec_version.get_version_name())
 109
 110     # look in cache first
 111     if caching and api.cache and not xrn:
 112         rspec =  api.cache.get(version_string)
 113         if rspec:
 114             return rspec
 115
 116     # get the callers hrn
 117     valid_cred = api.auth.checkCredentials(creds, 'listnodes', hrn)[0]
 118     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 119
 120     # attempt to use delegated credential first
 121     credential = api.getDelegatedCredential(creds)
 122     if not credential:
 123         credential = api.getCredential()
 124     credentials = [credential]
 125     threads = ThreadManager()
 126     for aggregate in api.aggregates:
 127         # prevent infinite loop. Dont send request back to caller
 128         # unless the caller is the aggregate's SM
 129         if caller_hrn == aggregate and aggregate != api.hrn:
 130             continue
 131
 132         # get the rspec from the aggregate
 133         server = api.aggregates[aggregate]
 134         #threads.run(server.ListResources, credentials, my_opts, call_id)
 135         threads.run(_ListResources, server, credentials, my_opts, call_id)
 136
 137     results = threads.get_results()
 138     rspec_version = RSpecVersion(my_opts.get('rspec_version'))
 139     if rspec_version['type'] == pg_rspec_ad_version['type']:
 140         rspec = PGRSpec()
 141     else:
 142         rspec = SfaRSpec()
 143     for result in results:
 144         try:
 145             rspec.merge(result)
 146         except:
 147             api.logger.info("SM.ListResources: Failed to merge aggregate rspec")
 148
 149     # cache the result
 150     if caching and api.cache and not xrn:
 151         api.cache.add(version_string, rspec.toxml())
 152
 153     return rspec.toxml()
 154
 155
 156 def CreateSliver(api, xrn, creds, rspec_str, users, call_id):
 157
 158     def _CreateSliver(server, xrn, credential, rspec, users, call_id):
 159         try:
 160             # Need to call GetVersion at an aggregate to determine the supported
 161             # rspec type/format beofre calling CreateSliver at an Aggregate.
 162             server_version = api.get_cached_server_version(server)
 163             if 'sfa' not in aggregate_version and 'geni_api' in aggregate_version:
 164                 # sfa aggregtes support both sfa and pg rspecs, no need to convert
 165                 # if aggregate supports sfa rspecs. otherwise convert to pg rspec
 166                 rspec = RSpecConverter.to_pg_rspec(rspec)
 167             args = [xrn, credential, rspec, users]
 168             if _call_id_supported(api, server):
 169                 args.append(call_id)
 170             try:
 171                 return server.CreateSliver(*args)
 172             except Exception, e:
 173                 api.logger.warn("CreateSliver failed at %s: %s" %(server.url, str(e)))
 174         except:
 175             logger.log_exc('Something wrong in _CreateSliver')
 176
 177     if Callids().already_handled(call_id): return ""
 178     # Validate the RSpec against PlanetLab's schema --disabled for now
 179     # The schema used here needs to aggregate the PL and VINI schemas
 180     # schema = "/var/www/html/schemas/pl.rng"
 181     rspec = parse_rspec(rspec_str)
 182     schema = None
 183     if schema:
 184         rspec.validate(schema)
 185
 186     # attempt to use delegated credential first
 187     credential = api.getDelegatedCredential(creds)
 188     if not credential:
 189         credential = api.getCredential()
 190
 191     # get the callers hrn
 192     hrn, type = urn_to_hrn(xrn)
 193     valid_cred = api.auth.checkCredentials(creds, 'createsliver', hrn)[0]
 194     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 195     threads = ThreadManager()
 196     for aggregate in api.aggregates:
 197         # prevent infinite loop. Dont send request back to caller
 198         # unless the caller is the aggregate's SM
 199         if caller_hrn == aggregate and aggregate != api.hrn:
 200             continue
 201         server = api.aggregates[aggregate]
 202         # Just send entire RSpec to each aggregate
 203         threads.run(_CreateSliver, server, xrn, credential, rspec.toxml(), users, call_id)
 204
 205     results = threads.get_results()
 206     rspec = SfaRSpec()
 207     for result in results:
 208         rspec.merge(result)
 209     return rspec.toxml()
 210
 211 def RenewSliver(api, xrn, creds, expiration_time, call_id):
 212     def _RenewSliver(server, xrn, creds, expiration_time, call_id):
 213         server_version = _get_server_version(api, server)
 214         args =  [xrn, creds, expiration_time, call_id]
 215         if _call_id_supported(api, server):
 216             args.append(call_id)
 217         return server.RenewSliver(*args)
 218
 219     if Callids().already_handled(call_id): return True
 220
 221     (hrn, type) = urn_to_hrn(xrn)
 222     # get the callers hrn
 223     valid_cred = api.auth.checkCredentials(creds, 'renewsliver', hrn)[0]
 224     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 225
 226     # attempt to use delegated credential first
 227     credential = api.getDelegatedCredential(creds)
 228     if not credential:
 229         credential = api.getCredential()
 230     threads = ThreadManager()
 231     for aggregate in api.aggregates:
 232         # prevent infinite loop. Dont send request back to caller
 233         # unless the caller is the aggregate's SM
 234         if caller_hrn == aggregate and aggregate != api.hrn:
 235             continue
 236         server = api.aggregates[aggregate]
 237         threads.run(_RenewSliver, server, xrn, [credential], expiration_time, call_id)
 238     # 'and' the results
 239     return reduce (lambda x,y: x and y, threads.get_results() , True)
 240
 241 def DeleteSliver(api, xrn, creds, call_id):
 242     def _DeleteSliver(server, xrn, creds, call_id):
 243         server_version = _get_server_version(api, server)
 244         args =  [xrn, creds]
 245         if _call_id_supported(api, server):
 246             args.append(call_id)
 247         return server.DeleteSliver(*args)
 248
 249     if Callids().already_handled(call_id): return ""
 250     (hrn, type) = urn_to_hrn(xrn)
 251     # get the callers hrn
 252     valid_cred = api.auth.checkCredentials(creds, 'deletesliver', hrn)[0]
 253     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 254
 255     # attempt to use delegated credential first
 256     credential = api.getDelegatedCredential(creds)
 257     if not credential:
 258         credential = api.getCredential()
 259     threads = ThreadManager()
 260     for aggregate in api.aggregates:
 261         # prevent infinite loop. Dont send request back to caller
 262         # unless the caller is the aggregate's SM
 263         if caller_hrn == aggregate and aggregate != api.hrn:
 264             continue
 265         server = api.aggregates[aggregate]
 266         threads.run(_DeleteSliver, server, xrn, credential, call_id)
 267     threads.get_results()
 268     return 1
 269
 270
 271 # first draft at a merging SliverStatus
 272 def SliverStatus(api, slice_xrn, creds, call_id):
 273     def _SliverStatus(server, xrn, creds, call_id):
 274         server_version = _get_server_version(api, server)
 275         args =  [xrn, creds]
 276         if _call_id_supported(api, server):
 277             args.append(call_id)
 278         return server.SliverStatus(*args)
 279
 280     if Callids().already_handled(call_id): return {}
 281     # attempt to use delegated credential first
 282     credential = api.getDelegatedCredential(creds)
 283     if not credential:
 284         credential = api.getCredential()
 285     threads = ThreadManager()
 286     for aggregate in api.aggregates:
 287         server = api.aggregates[aggregate]
 288         threads.run (_SliverStatus, server, slice_xrn, credential, call_id)
 289     results = threads.get_results()
 290
 291     # get rid of any void result - e.g. when call_id was hit where by convention we return {}
 292     results = [ result for result in results if result and result['geni_resources']]
 293
 294     # do not try to combine if there's no result
 295     if not results : return {}
 296
 297     # otherwise let's merge stuff
 298     overall = {}
 299
 300     # mmh, it is expected that all results carry the same urn
 301     overall['geni_urn'] = results[0]['geni_urn']
 302     overall['pl_login'] = results[0]['pl_login']
 303     # append all geni_resources
 304     overall['geni_resources'] = \
 305         reduce (lambda x,y: x+y, [ result['geni_resources'] for result in results] , [])
 306     overall['status'] = 'unknown'
 307     if overall['geni_resources']:
 308         overall['status'] = 'ready'
 309
 310     return overall
 311
 312 caching=True
 313 #caching=False
 314 def ListSlices(api, creds, call_id):
 315     def _ListSlices(server, creds, call_id):
 316         server_version = _get_server_version(api, server)
 317         args =  [creds]
 318         if _call_id_supported(api, server):
 319             args.append(call_id)
 320         return server.ListSlices(*args)
 321
 322     if Callids().already_handled(call_id): return []
 323
 324     # look in cache first
 325     if caching and api.cache:
 326         slices = api.cache.get('slices')
 327         if slices:
 328             return slices
 329
 330     # get the callers hrn
 331     valid_cred = api.auth.checkCredentials(creds, 'listslices', None)[0]
 332     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 333
 334     # attempt to use delegated credential first
 335     credential = api.getDelegatedCredential(creds)
 336     if not credential:
 337         credential = api.getCredential()
 338     threads = ThreadManager()
 339     # fetch from aggregates
 340     for aggregate in api.aggregates:
 341         # prevent infinite loop. Dont send request back to caller
 342         # unless the caller is the aggregate's SM
 343         if caller_hrn == aggregate and aggregate != api.hrn:
 344             continue
 345         server = api.aggregates[aggregate]
 346         threads.run(_ListSlices, server, credential, call_id)
 347
 348     # combime results
 349     results = threads.get_results()
 350     slices = []
 351     for result in results:
 352         slices.extend(result)
 353
 354     # cache the result
 355     if caching and api.cache:
 356         api.cache.add('slices', slices)
 357
 358     return slices
 359
 360
 361 def get_ticket(api, xrn, creds, rspec, users):
 362     slice_hrn, type = urn_to_hrn(xrn)
 363     # get the netspecs contained within the clients rspec
 364     aggregate_rspecs = {}
 365     tree= etree.parse(StringIO(rspec))
 366     elements = tree.findall('./network')
 367     for element in elements:
 368         aggregate_hrn = element.values()[0]
 369         aggregate_rspecs[aggregate_hrn] = rspec
 370
 371     # get the callers hrn
 372     valid_cred = api.auth.checkCredentials(creds, 'getticket', slice_hrn)[0]
 373     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 374
 375     # attempt to use delegated credential first
 376     credential = api.getDelegatedCredential(creds)
 377     if not credential:
 378         credential = api.getCredential()
 379     threads = ThreadManager()
 380     for (aggregate, aggregate_rspec) in aggregate_rspecs.iteritems():
 381         # prevent infinite loop. Dont send request back to caller
 382         # unless the caller is the aggregate's SM
 383         if caller_hrn == aggregate and aggregate != api.hrn:
 384             continue
 385         server = None
 386         if aggregate in api.aggregates:
 387             server = api.aggregates[aggregate]
 388         else:
 389             net_urn = hrn_to_urn(aggregate, 'authority')
 390             # we may have a peer that knows about this aggregate
 391             for agg in api.aggregates:
 392                 target_aggs = api.aggregates[agg].get_aggregates(credential, net_urn)
 393                 if not target_aggs or not 'hrn' in target_aggs[0]:
 394                     continue
 395                 # send the request to this address
 396                 url = target_aggs[0]['url']
 397                 server = xmlrpcprotocol.get_server(url, api.key_file, api.cert_file)
 398                 # aggregate found, no need to keep looping
 399                 break
 400         if server is None:
 401             continue
 402         threads.run(server.GetTicket, xrn, credential, aggregate_rspec, users)
 403
 404     results = threads.get_results()
 405
 406     # gather information from each ticket
 407     rspecs = []
 408     initscripts = []
 409     slivers = []
 410     object_gid = None
 411     for result in results:
 412         agg_ticket = SfaTicket(string=result)
 413         attrs = agg_ticket.get_attributes()
 414         if not object_gid:
 415             object_gid = agg_ticket.get_gid_object()
 416         rspecs.append(agg_ticket.get_rspec())
 417         initscripts.extend(attrs.get('initscripts', []))
 418         slivers.extend(attrs.get('slivers', []))
 419
 420     # merge info
 421     attributes = {'initscripts': initscripts,
 422                  'slivers': slivers}
 423     merged_rspec = merge_rspecs(rspecs)
 424
 425     # create a new ticket
 426     ticket = SfaTicket(subject = slice_hrn)
 427     ticket.set_gid_caller(api.auth.client_gid)
 428     ticket.set_issuer(key=api.key, subject=api.hrn)
 429     ticket.set_gid_object(object_gid)
 430     ticket.set_pubkey(object_gid.get_pubkey())
 431     #new_ticket.set_parent(api.auth.hierarchy.get_auth_ticket(auth_hrn))
 432     ticket.set_attributes(attributes)
 433     ticket.set_rspec(merged_rspec)
 434     ticket.encode()
 435     ticket.sign()
 436     return ticket.save_to_string(save_parents=True)
 437
 438 def start_slice(api, xrn, creds):
 439     hrn, type = urn_to_hrn(xrn)
 440
 441     # get the callers hrn
 442     valid_cred = api.auth.checkCredentials(creds, 'startslice', hrn)[0]
 443     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 444
 445     # attempt to use delegated credential first
 446     credential = api.getDelegatedCredential(creds)
 447     if not credential:
 448         credential = api.getCredential()
 449     threads = ThreadManager()
 450     for aggregate in api.aggregates:
 451         # prevent infinite loop. Dont send request back to caller
 452         # unless the caller is the aggregate's SM
 453         if caller_hrn == aggregate and aggregate != api.hrn:
 454             continue
 455         server = api.aggregates[aggregate]
 456         threads.run(server.Start, xrn, credential)
 457     threads.get_results()
 458     return 1
 459
 460 def stop_slice(api, xrn, creds):
 461     hrn, type = urn_to_hrn(xrn)
 462
 463     # get the callers hrn
 464     valid_cred = api.auth.checkCredentials(creds, 'stopslice', hrn)[0]
 465     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 466
 467     # attempt to use delegated credential first
 468     credential = api.getDelegatedCredential(creds)
 469     if not credential:
 470         credential = api.getCredential()
 471     threads = ThreadManager()
 472     for aggregate in api.aggregates:
 473         # prevent infinite loop. Dont send request back to caller
 474         # unless the caller is the aggregate's SM
 475         if caller_hrn == aggregate and aggregate != api.hrn:
 476             continue
 477         server = api.aggregates[aggregate]
 478         threads.run(server.Stop, xrn, credential)
 479     threads.get_results()
 480     return 1
 481
 482 def reset_slice(api, xrn):
 483     """
 484     Not implemented
 485     """
 486     return 1
 487
 488 def shutdown(api, xrn, creds):
 489     """
 490     Not implemented
 491     """
 492     return 1
 493
 494 def status(api, xrn, creds):
 495     """
 496     Not implemented
 497     """
 498     return 1
 499
 500 def main():
 501     r = RSpec()
 502     r.parseFile(sys.argv[1])
 503     rspec = r.toDict()
 504     CreateSliver(None,'plc.princeton.tmacktestslice',rspec,'create-slice-tmacktestslice')
 505
 506 if __name__ == "__main__":
 507     main()
 508