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.rspec_converter import RSpecConverter
  19 from sfa.rspecs.version_manager import VersionManager
  20 from sfa.rspecs.rspec import RSpec
  21 from sfa.util.policy import Policy
  22 from sfa.util.prefixTree import prefixTree
  23 from sfa.util.sfaticket import *
  24 from sfa.trust.credential import Credential
  25 from sfa.util.threadmanager import ThreadManager
  26 import sfa.util.xmlrpcprotocol as xmlrpcprotocol
  27 import sfa.plc.peers as peers
  28 from sfa.util.version import version_core
  29 from sfa.util.callids import Callids
  30
  31
  32 def _call_id_supported(api, server):
  33     """
  34     Returns true if server support the optional call_id arg, false otherwise.
  35     """
  36     server_version = api.get_cached_server_version(server)
  37
  38     if 'sfa' in server_version:
  39         code_tag = server_version['code_tag']
  40         code_tag_parts = code_tag.split("-")
  41
  42         version_parts = code_tag_parts[0].split(".")
  43         major, minor = version_parts[0:2]
  44         rev = code_tag_parts[1]
  45         if int(major) > 1:
  46             if int(minor) > 0 or int(rev) > 20:
  47                 return True
  48     return False
  49
  50 # we have specialized xmlrpclib.ServerProxy to remember the input url
  51 # OTOH it's not clear if we're only dealing with XMLRPCServerProxy instances
  52 def get_serverproxy_url (server):
  53     try:
  54         return server.url
  55     except:
  56         logger.warning("GetVersion, falling back to xmlrpclib.ServerProxy internals")
  57         return server._ServerProxy__host + server._ServerProxy__handler
  58
  59 def GetVersion(api):
  60     # peers explicitly in aggregates.xml
  61     peers =dict ([ (peername,get_serverproxy_url(v)) for (peername,v) in api.aggregates.iteritems()
  62                    if peername != api.hrn])
  63     version_manager = VersionManager()
  64     ad_rspec_versions = []
  65     request_rspec_versions = []
  66     for rspec_version in version_manager.versions:
  67         if rspec_version in ['*', 'ad']:
  68             request_rspec_versions.append(rspec_version.to_dict())
  69         if rspec_version in ['*', 'request']:
  70             request_rspec_version.append(rspec_version.to_dict())
  71     default_rspec_version = version_manager.get_version("sfa 1").to_dict()
  72     xrn=Xrn(api.hrn)
  73     version_more = {'interface':'slicemgr',
  74                     'hrn' : xrn.get_hrn(),
  75                     'urn' : xrn.get_urn(),
  76                     'peers': peers,
  77                     'request_rspec_versions': request_rspec_versions,
  78                     'ad_rspec_versions': ad_rspec_versions,
  79                     'default_ad_rspec': default_rspec_version
  80                     }
  81     sm_version=version_core(version_more)
  82     # local aggregate if present needs to have localhost resolved
  83     if api.hrn in api.aggregates:
  84         local_am_url=get_serverproxy_url(api.aggregates[api.hrn])
  85         sm_version['peers'][api.hrn]=local_am_url.replace('localhost',sm_version['hostname'])
  86     return sm_version
  87
  88 def drop_slicemgr_stats(rspec):
  89     try:
  90         stats_elements = rspec.xml.xpath('//statistics')
  91         for node in stats_elements:
  92             node.getparent().remove(node)
  93     except Exception, e:
  94         api.logger.warn("drop_slicemgr_stats failed: %s " % (str(e)))
  95
  96 def add_slicemgr_stat(rspec, callname, aggname, elapsed, status):
  97     try:
  98         stats_tags = rspec.xml.xpath('//statistics[@call="%s"]' % callname)
  99         if stats_tags:
 100             stats_tag = stats_tags[0]
 101         else:
 102             stats_tag = etree.SubElement(rspec.xml.root, "statistics", call=callname)
 103
 104         etree.SubElement(stats_tag, "aggregate", name=str(aggname), elapsed=str(elapsed), status=str(status))
 105     except Exception, e:
 106         api.logger.warn("add_slicemgr_stat failed on  %s: %s" %(aggname, str(e)))
 107
 108 def ListResources(api, creds, options, call_id):
 109     version_manager = VersionManager()
 110     def _ListResources(aggregate, server, credential, opts, call_id):
 111
 112         my_opts = copy(opts)
 113         args = [credential, my_opts]
 114         tStart = time.time()
 115         try:
 116             if _call_id_supported(api, server):
 117                 args.append(call_id)
 118             version = api.get_cached_server_version(server)
 119             # force ProtoGENI aggregates to give us a v2 RSpec
 120             if 'sfa' not in version.keys():
 121                 my_opts['rspec_version'] = version_manager.get_version('ProtoGENI 2').to_dict()
 122             rspec = server.ListResources(*args)
 123             return {"aggregate": aggregate, "rspec": rspec, "elapsed": time.time()-tStart, "status": "success"}
 124         except Exception, e:
 125             api.logger.warn("ListResources failed at %s: %s" %(server.url, str(e)))
 126             return {"aggregate": aggregate, "elapsed": time.time()-tStart, "status": "exception"}
 127
 128     if Callids().already_handled(call_id): return ""
 129
 130     # get slice's hrn from options
 131     xrn = options.get('geni_slice_urn', '')
 132     (hrn, type) = urn_to_hrn(xrn)
 133     if 'geni_compressed' in options:
 134         del(options['geni_compressed'])
 135
 136     # get the rspec's return format from options
 137     rspec_version = version_manager.get_version(options.get('rspec_version'))
 138     version_string = "rspec_%s" % (rspec_version.to_string())
 139
 140     # look in cache first
 141     if caching and api.cache and not xrn:
 142         rspec =  api.cache.get(version_string)
 143         if rspec:
 144             return rspec
 145
 146     # get the callers hrn
 147     valid_cred = api.auth.checkCredentials(creds, 'listnodes', hrn)[0]
 148     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 149
 150     # attempt to use delegated credential first
 151     credential = api.getDelegatedCredential(creds)
 152     if not credential:
 153         credential = api.getCredential()
 154     credentials = [credential]
 155     threads = ThreadManager()
 156     for aggregate in api.aggregates:
 157         # prevent infinite loop. Dont send request back to caller
 158         # unless the caller is the aggregate's SM
 159         if caller_hrn == aggregate and aggregate != api.hrn:
 160             continue
 161
 162         # get the rspec from the aggregate
 163         server = api.aggregates[aggregate]
 164         threads.run(_ListResources, aggregate, server, credentials, options, call_id)
 165
 166     results = threads.get_results()
 167     rspec_version = version_manager.get_version(options.get('rspec_version'))
 168     if xrn:
 169         result_version = version_manager._get_version(rspec_version.type, rspec_version.version, 'manifest')
 170     else:
 171         result_version = version_manager._get_version(rspec_version.type, rspec_version.version, 'ad')
 172     rspec = RSpec(version=result_version)
 173     for result in results:
 174         add_slicemgr_stat(rspec, "ListResources", result["aggregate"], result["elapsed"], result["status"])
 175         if result["status"]=="success":
 176             try:
 177                 rspec.version.merge(result["rspec"])
 178             except:
 179                 api.logger.log_exc("SM.ListResources: Failed to merge aggregate rspec")
 180
 181     # cache the result
 182     if caching and api.cache and not xrn:
 183         api.cache.add(version_string, rspec.toxml())
 184
 185     return rspec.toxml()
 186
 187
 188 def CreateSliver(api, xrn, creds, rspec_str, users, call_id):
 189
 190     version_manager = VersionManager()
 191     def _CreateSliver(aggregate, server, xrn, credential, rspec, users, call_id):
 192         tStart = time.time()
 193         try:
 194             # Need to call GetVersion at an aggregate to determine the supported
 195             # rspec type/format beofre calling CreateSliver at an Aggregate.
 196             server_version = api.get_cached_server_version(server)
 197             if 'sfa' not in server_version and 'geni_api' in server_version:
 198                 # sfa aggregtes support both sfa and pg rspecs, no need to convert
 199                 # if aggregate supports sfa rspecs. otherwise convert to pg rspec
 200                 rspec = RSpecConverter.to_pg_rspec(rspec, 'request')
 201             args = [xrn, credential, rspec, users]
 202             if _call_id_supported(api, server):
 203                 args.append(call_id)
 204             rspec = server.CreateSliver(*args)
 205             return {"aggregate": aggregate, "rspec": rspec, "elapsed": time.time()-tStart, "status": "success"}
 206         except:
 207             logger.log_exc('Something wrong in _CreateSliver with URL %s'%server.url)
 208             return {"aggregate": aggregate, "elapsed": time.time()-tStart, "status": "exception"}
 209
 210     if Callids().already_handled(call_id): return ""
 211     # Validate the RSpec against PlanetLab's schema --disabled for now
 212     # The schema used here needs to aggregate the PL and VINI schemas
 213     # schema = "/var/www/html/schemas/pl.rng"
 214     rspec = RSpec(rspec_str)
 215     schema = None
 216     if schema:
 217         rspec.validate(schema)
 218
 219     # if there is a <statistics> section, the aggregates don't care about it,
 220     # so delete it.
 221     drop_slicemgr_stats(rspec)
 222
 223     # attempt to use delegated credential first
 224     credential = api.getDelegatedCredential(creds)
 225     if not credential:
 226         credential = api.getCredential()
 227
 228     # get the callers hrn
 229     hrn, type = urn_to_hrn(xrn)
 230     valid_cred = api.auth.checkCredentials(creds, 'createsliver', hrn)[0]
 231     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 232     threads = ThreadManager()
 233     for aggregate in api.aggregates:
 234         # prevent infinite loop. Dont send request back to caller
 235         # unless the caller is the aggregate's SM
 236         if caller_hrn == aggregate and aggregate != api.hrn:
 237             continue
 238         server = api.aggregates[aggregate]
 239         # Just send entire RSpec to each aggregate
 240         threads.run(_CreateSliver, aggregate, server, xrn, credential, rspec.toxml(), users, call_id)
 241
 242     results = threads.get_results()
 243     manifest_version = version_manager._get_version(rspec.version.type, rspec.version.version, 'manifest')
 244     result_rspec = RSpec(version=manifest_version)
 245     for result in results:
 246         add_slicemgr_stat(rspec, "CreateSliver", result["aggregate"], result["elapsed"], result["status"])
 247         if result["status"]=="success":
 248             try:
 249                 result_rspec.version.merge(result["rspec"])
 250             except:
 251                 api.logger.log_exc("SM.CreateSliver: Failed to merge aggregate rspec")
 252     return rspec.toxml()
 253
 254 def RenewSliver(api, xrn, creds, expiration_time, call_id):
 255     def _RenewSliver(server, xrn, creds, expiration_time, call_id):
 256         server_version = api.get_cached_server_version(server)
 257         args =  [xrn, creds, expiration_time, call_id]
 258         if _call_id_supported(api, server):
 259             args.append(call_id)
 260         return server.RenewSliver(*args)
 261
 262     if Callids().already_handled(call_id): return True
 263
 264     (hrn, type) = urn_to_hrn(xrn)
 265     # get the callers hrn
 266     valid_cred = api.auth.checkCredentials(creds, 'renewsliver', hrn)[0]
 267     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 268
 269     # attempt to use delegated credential first
 270     credential = api.getDelegatedCredential(creds)
 271     if not credential:
 272         credential = api.getCredential()
 273     threads = ThreadManager()
 274     for aggregate in api.aggregates:
 275         # prevent infinite loop. Dont send request back to caller
 276         # unless the caller is the aggregate's SM
 277         if caller_hrn == aggregate and aggregate != api.hrn:
 278             continue
 279         server = api.aggregates[aggregate]
 280         threads.run(_RenewSliver, server, xrn, [credential], expiration_time, call_id)
 281     # 'and' the results
 282     return reduce (lambda x,y: x and y, threads.get_results() , True)
 283
 284 def DeleteSliver(api, xrn, creds, call_id):
 285     def _DeleteSliver(server, xrn, creds, call_id):
 286         server_version = api.get_cached_server_version(server)
 287         args =  [xrn, creds]
 288         if _call_id_supported(api, server):
 289             args.append(call_id)
 290         return server.DeleteSliver(*args)
 291
 292     if Callids().already_handled(call_id): return ""
 293     (hrn, type) = urn_to_hrn(xrn)
 294     # get the callers hrn
 295     valid_cred = api.auth.checkCredentials(creds, 'deletesliver', hrn)[0]
 296     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 297
 298     # attempt to use delegated credential first
 299     credential = api.getDelegatedCredential(creds)
 300     if not credential:
 301         credential = api.getCredential()
 302     threads = ThreadManager()
 303     for aggregate in api.aggregates:
 304         # prevent infinite loop. Dont send request back to caller
 305         # unless the caller is the aggregate's SM
 306         if caller_hrn == aggregate and aggregate != api.hrn:
 307             continue
 308         server = api.aggregates[aggregate]
 309         threads.run(_DeleteSliver, server, xrn, credential, call_id)
 310     threads.get_results()
 311     return 1
 312
 313
 314 # first draft at a merging SliverStatus
 315 def SliverStatus(api, slice_xrn, creds, call_id):
 316     def _SliverStatus(server, xrn, creds, call_id):
 317         server_version = api.get_cached_server_version(server)
 318         args =  [xrn, creds]
 319         if _call_id_supported(api, server):
 320             args.append(call_id)
 321         return server.SliverStatus(*args)
 322
 323     if Callids().already_handled(call_id): return {}
 324     # attempt to use delegated credential first
 325     credential = api.getDelegatedCredential(creds)
 326     if not credential:
 327         credential = api.getCredential()
 328     threads = ThreadManager()
 329     for aggregate in api.aggregates:
 330         server = api.aggregates[aggregate]
 331         threads.run (_SliverStatus, server, slice_xrn, credential, call_id)
 332     results = threads.get_results()
 333
 334     # get rid of any void result - e.g. when call_id was hit where by convention we return {}
 335     results = [ result for result in results if result and result['geni_resources']]
 336
 337     # do not try to combine if there's no result
 338     if not results : return {}
 339
 340     # otherwise let's merge stuff
 341     overall = {}
 342
 343     # mmh, it is expected that all results carry the same urn
 344     overall['geni_urn'] = results[0]['geni_urn']
 345     overall['pl_login'] = results[0]['pl_login']
 346     # append all geni_resources
 347     overall['geni_resources'] = \
 348         reduce (lambda x,y: x+y, [ result['geni_resources'] for result in results] , [])
 349     overall['status'] = 'unknown'
 350     if overall['geni_resources']:
 351         overall['status'] = 'ready'
 352
 353     return overall
 354
 355 caching=True
 356 #caching=False
 357 def ListSlices(api, creds, call_id):
 358     def _ListSlices(server, creds, call_id):
 359         server_version = api.get_cached_server_version(server)
 360         args =  [creds]
 361         if _call_id_supported(api, server):
 362             args.append(call_id)
 363         return server.ListSlices(*args)
 364
 365     if Callids().already_handled(call_id): return []
 366
 367     # look in cache first
 368     if caching and api.cache:
 369         slices = api.cache.get('slices')
 370         if slices:
 371             return slices
 372
 373     # get the callers hrn
 374     valid_cred = api.auth.checkCredentials(creds, 'listslices', None)[0]
 375     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 376
 377     # attempt to use delegated credential first
 378     credential = api.getDelegatedCredential(creds)
 379     if not credential:
 380         credential = api.getCredential()
 381     threads = ThreadManager()
 382     # fetch from aggregates
 383     for aggregate in api.aggregates:
 384         # prevent infinite loop. Dont send request back to caller
 385         # unless the caller is the aggregate's SM
 386         if caller_hrn == aggregate and aggregate != api.hrn:
 387             continue
 388         server = api.aggregates[aggregate]
 389         threads.run(_ListSlices, server, credential, call_id)
 390
 391     # combime results
 392     results = threads.get_results()
 393     slices = []
 394     for result in results:
 395         slices.extend(result)
 396
 397     # cache the result
 398     if caching and api.cache:
 399         api.cache.add('slices', slices)
 400
 401     return slices
 402
 403
 404 def get_ticket(api, xrn, creds, rspec, users):
 405     slice_hrn, type = urn_to_hrn(xrn)
 406     # get the netspecs contained within the clients rspec
 407     aggregate_rspecs = {}
 408     tree= etree.parse(StringIO(rspec))
 409     elements = tree.findall('./network')
 410     for element in elements:
 411         aggregate_hrn = element.values()[0]
 412         aggregate_rspecs[aggregate_hrn] = rspec
 413
 414     # get the callers hrn
 415     valid_cred = api.auth.checkCredentials(creds, 'getticket', slice_hrn)[0]
 416     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 417
 418     # attempt to use delegated credential first
 419     credential = api.getDelegatedCredential(creds)
 420     if not credential:
 421         credential = api.getCredential()
 422     threads = ThreadManager()
 423     for (aggregate, aggregate_rspec) in aggregate_rspecs.iteritems():
 424         # prevent infinite loop. Dont send request back to caller
 425         # unless the caller is the aggregate's SM
 426         if caller_hrn == aggregate and aggregate != api.hrn:
 427             continue
 428         server = None
 429         if aggregate in api.aggregates:
 430             server = api.aggregates[aggregate]
 431         else:
 432             net_urn = hrn_to_urn(aggregate, 'authority')
 433             # we may have a peer that knows about this aggregate
 434             for agg in api.aggregates:
 435                 target_aggs = api.aggregates[agg].get_aggregates(credential, net_urn)
 436                 if not target_aggs or not 'hrn' in target_aggs[0]:
 437                     continue
 438                 # send the request to this address
 439                 url = target_aggs[0]['url']
 440                 server = xmlrpcprotocol.get_server(url, api.key_file, api.cert_file, timeout=30)
 441                 # aggregate found, no need to keep looping
 442                 break
 443         if server is None:
 444             continue
 445         threads.run(server.GetTicket, xrn, credential, aggregate_rspec, users)
 446
 447     results = threads.get_results()
 448
 449     # gather information from each ticket
 450     rspecs = []
 451     initscripts = []
 452     slivers = []
 453     object_gid = None
 454     for result in results:
 455         agg_ticket = SfaTicket(string=result)
 456         attrs = agg_ticket.get_attributes()
 457         if not object_gid:
 458             object_gid = agg_ticket.get_gid_object()
 459         rspecs.append(agg_ticket.get_rspec())
 460         initscripts.extend(attrs.get('initscripts', []))
 461         slivers.extend(attrs.get('slivers', []))
 462
 463     # merge info
 464     attributes = {'initscripts': initscripts,
 465                  'slivers': slivers}
 466     merged_rspec = merge_rspecs(rspecs)
 467
 468     # create a new ticket
 469     ticket = SfaTicket(subject = slice_hrn)
 470     ticket.set_gid_caller(api.auth.client_gid)
 471     ticket.set_issuer(key=api.key, subject=api.hrn)
 472     ticket.set_gid_object(object_gid)
 473     ticket.set_pubkey(object_gid.get_pubkey())
 474     #new_ticket.set_parent(api.auth.hierarchy.get_auth_ticket(auth_hrn))
 475     ticket.set_attributes(attributes)
 476     ticket.set_rspec(merged_rspec)
 477     ticket.encode()
 478     ticket.sign()
 479     return ticket.save_to_string(save_parents=True)
 480
 481 def start_slice(api, xrn, creds):
 482     hrn, type = urn_to_hrn(xrn)
 483
 484     # get the callers hrn
 485     valid_cred = api.auth.checkCredentials(creds, 'startslice', hrn)[0]
 486     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 487
 488     # attempt to use delegated credential first
 489     credential = api.getDelegatedCredential(creds)
 490     if not credential:
 491         credential = api.getCredential()
 492     threads = ThreadManager()
 493     for aggregate in api.aggregates:
 494         # prevent infinite loop. Dont send request back to caller
 495         # unless the caller is the aggregate's SM
 496         if caller_hrn == aggregate and aggregate != api.hrn:
 497             continue
 498         server = api.aggregates[aggregate]
 499         threads.run(server.Start, xrn, credential)
 500     threads.get_results()
 501     return 1
 502
 503 def stop_slice(api, xrn, creds):
 504     hrn, type = urn_to_hrn(xrn)
 505
 506     # get the callers hrn
 507     valid_cred = api.auth.checkCredentials(creds, 'stopslice', hrn)[0]
 508     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 509
 510     # attempt to use delegated credential first
 511     credential = api.getDelegatedCredential(creds)
 512     if not credential:
 513         credential = api.getCredential()
 514     threads = ThreadManager()
 515     for aggregate in api.aggregates:
 516         # prevent infinite loop. Dont send request back to caller
 517         # unless the caller is the aggregate's SM
 518         if caller_hrn == aggregate and aggregate != api.hrn:
 519             continue
 520         server = api.aggregates[aggregate]
 521         threads.run(server.Stop, xrn, credential)
 522     threads.get_results()
 523     return 1
 524
 525 def reset_slice(api, xrn):
 526     """
 527     Not implemented
 528     """
 529     return 1
 530
 531 def shutdown(api, xrn, creds):
 532     """
 533     Not implemented
 534     """
 535     return 1
 536
 537 def status(api, xrn, creds):
 538     """
 539     Not implemented
 540     """
 541     return 1
 542
 543 def main():
 544     r = RSpec()
 545     r.parseFile(sys.argv[1])
 546     rspec = r.toDict()
 547     CreateSliver(None,'plc.princeton.tmacktestslice',rspec,'create-slice-tmacktestslice')
 548
 549 if __name__ == "__main__":
 550     main()
 551