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': dict(sfa_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, "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 1')
 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     rspec = RSpec(version=rspec_version)
 169     for result in results:
 170         add_slicemgr_stat(rspec, "ListResources", result["aggregate"], result["elapsed"], result["status"])
 171         if result["status"]=="success":
 172             try:
 173                 rspec.version.merge(result["rspec"])
 174             except:
 175                 api.logger.log_exc("SM.ListResources: Failed to merge aggregate rspec")
 176
 177     # cache the result
 178     if caching and api.cache and not xrn:
 179         api.cache.add(version_string, rspec.toxml())
 180
 181     return rspec.toxml()
 182
 183
 184 def CreateSliver(api, xrn, creds, rspec_str, users, call_id):
 185
 186     version_manager = VersionManager()
 187     def _CreateSliver(aggregate, server, xrn, credential, rspec, users, call_id):
 188         tStart = time.time()
 189         try:
 190             # Need to call GetVersion at an aggregate to determine the supported
 191             # rspec type/format beofre calling CreateSliver at an Aggregate.
 192             server_version = api.get_cached_server_version(server)
 193             if 'sfa' not in server_version and 'geni_api' in server_version:
 194                 # sfa aggregtes support both sfa and pg rspecs, no need to convert
 195                 # if aggregate supports sfa rspecs. otherwise convert to pg rspec
 196                 rspec = RSpecConverter.to_pg_rspec(rspec)
 197             args = [xrn, credential, rspec, users]
 198             if _call_id_supported(api, server):
 199                 args.append(call_id)
 200             rspec = server.CreateSliver(*args)
 201             return {"aggregate": aggregate, "rspec": rspec, "elapsed": time.time()-tStart, "status": "success"}
 202         except:
 203             logger.log_exc('Something wrong in _CreateSliver with URL %s'%server.url)
 204             return {"aggregate": aggregate, "elapsed": time.time()-tStart, "status": "exception"}
 205
 206     if Callids().already_handled(call_id): return ""
 207     # Validate the RSpec against PlanetLab's schema --disabled for now
 208     # The schema used here needs to aggregate the PL and VINI schemas
 209     # schema = "/var/www/html/schemas/pl.rng"
 210     rspec = RSpec(rspec_str)
 211     schema = None
 212     if schema:
 213         rspec.validate(schema)
 214
 215     # if there is a <statistics> section, the aggregates don't care about it,
 216     # so delete it.
 217     drop_slicemgr_stats(rspec)
 218
 219     # attempt to use delegated credential first
 220     credential = api.getDelegatedCredential(creds)
 221     if not credential:
 222         credential = api.getCredential()
 223
 224     # get the callers hrn
 225     hrn, type = urn_to_hrn(xrn)
 226     valid_cred = api.auth.checkCredentials(creds, 'createsliver', hrn)[0]
 227     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 228     threads = ThreadManager()
 229     for aggregate in api.aggregates:
 230         # prevent infinite loop. Dont send request back to caller
 231         # unless the caller is the aggregate's SM
 232         if caller_hrn == aggregate and aggregate != api.hrn:
 233             continue
 234         server = api.aggregates[aggregate]
 235         # Just send entire RSpec to each aggregate
 236         threads.run(_CreateSliver, aggregate, server, xrn, credential, rspec.toxml(), users, call_id)
 237
 238     results = threads.get_results()
 239     result_rspec = RSpec(version=rspec.version)
 240     for result in results:
 241         add_slicemgr_stat(rspec, "CreateSliver", result["aggregate"], result["elapsed"], result["status"])
 242         if result["status"]=="success":
 243             try:
 244                 result_rspec.version.merge(result["rspec"])
 245             except:
 246                 api.logger.log_exc("SM.CreateSliver: Failed to merge aggregate rspec")
 247     return rspec.toxml()
 248
 249 def RenewSliver(api, xrn, creds, expiration_time, call_id):
 250     def _RenewSliver(server, xrn, creds, expiration_time, call_id):
 251         server_version = api.get_cached_server_version(server)
 252         args =  [xrn, creds, expiration_time, call_id]
 253         if _call_id_supported(api, server):
 254             args.append(call_id)
 255         return server.RenewSliver(*args)
 256
 257     if Callids().already_handled(call_id): return True
 258
 259     (hrn, type) = urn_to_hrn(xrn)
 260     # get the callers hrn
 261     valid_cred = api.auth.checkCredentials(creds, 'renewsliver', hrn)[0]
 262     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 263
 264     # attempt to use delegated credential first
 265     credential = api.getDelegatedCredential(creds)
 266     if not credential:
 267         credential = api.getCredential()
 268     threads = ThreadManager()
 269     for aggregate in api.aggregates:
 270         # prevent infinite loop. Dont send request back to caller
 271         # unless the caller is the aggregate's SM
 272         if caller_hrn == aggregate and aggregate != api.hrn:
 273             continue
 274         server = api.aggregates[aggregate]
 275         threads.run(_RenewSliver, server, xrn, [credential], expiration_time, call_id)
 276     # 'and' the results
 277     return reduce (lambda x,y: x and y, threads.get_results() , True)
 278
 279 def DeleteSliver(api, xrn, creds, call_id):
 280     def _DeleteSliver(server, xrn, creds, call_id):
 281         server_version = api.get_cached_server_version(server)
 282         args =  [xrn, creds]
 283         if _call_id_supported(api, server):
 284             args.append(call_id)
 285         return server.DeleteSliver(*args)
 286
 287     if Callids().already_handled(call_id): return ""
 288     (hrn, type) = urn_to_hrn(xrn)
 289     # get the callers hrn
 290     valid_cred = api.auth.checkCredentials(creds, 'deletesliver', hrn)[0]
 291     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 292
 293     # attempt to use delegated credential first
 294     credential = api.getDelegatedCredential(creds)
 295     if not credential:
 296         credential = api.getCredential()
 297     threads = ThreadManager()
 298     for aggregate in api.aggregates:
 299         # prevent infinite loop. Dont send request back to caller
 300         # unless the caller is the aggregate's SM
 301         if caller_hrn == aggregate and aggregate != api.hrn:
 302             continue
 303         server = api.aggregates[aggregate]
 304         threads.run(_DeleteSliver, server, xrn, credential, call_id)
 305     threads.get_results()
 306     return 1
 307
 308
 309 # first draft at a merging SliverStatus
 310 def SliverStatus(api, slice_xrn, creds, call_id):
 311     def _SliverStatus(server, xrn, creds, call_id):
 312         server_version = api.get_cached_server_version(server)
 313         args =  [xrn, creds]
 314         if _call_id_supported(api, server):
 315             args.append(call_id)
 316         return server.SliverStatus(*args)
 317
 318     if Callids().already_handled(call_id): return {}
 319     # attempt to use delegated credential first
 320     credential = api.getDelegatedCredential(creds)
 321     if not credential:
 322         credential = api.getCredential()
 323     threads = ThreadManager()
 324     for aggregate in api.aggregates:
 325         server = api.aggregates[aggregate]
 326         threads.run (_SliverStatus, server, slice_xrn, credential, call_id)
 327     results = threads.get_results()
 328
 329     # get rid of any void result - e.g. when call_id was hit where by convention we return {}
 330     results = [ result for result in results if result and result['geni_resources']]
 331
 332     # do not try to combine if there's no result
 333     if not results : return {}
 334
 335     # otherwise let's merge stuff
 336     overall = {}
 337
 338     # mmh, it is expected that all results carry the same urn
 339     overall['geni_urn'] = results[0]['geni_urn']
 340     overall['pl_login'] = results[0]['pl_login']
 341     # append all geni_resources
 342     overall['geni_resources'] = \
 343         reduce (lambda x,y: x+y, [ result['geni_resources'] for result in results] , [])
 344     overall['status'] = 'unknown'
 345     if overall['geni_resources']:
 346         overall['status'] = 'ready'
 347
 348     return overall
 349
 350 caching=True
 351 #caching=False
 352 def ListSlices(api, creds, call_id):
 353     def _ListSlices(server, creds, call_id):
 354         server_version = api.get_cached_server_version(server)
 355         args =  [creds]
 356         if _call_id_supported(api, server):
 357             args.append(call_id)
 358         return server.ListSlices(*args)
 359
 360     if Callids().already_handled(call_id): return []
 361
 362     # look in cache first
 363     if caching and api.cache:
 364         slices = api.cache.get('slices')
 365         if slices:
 366             return slices
 367
 368     # get the callers hrn
 369     valid_cred = api.auth.checkCredentials(creds, 'listslices', None)[0]
 370     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 371
 372     # attempt to use delegated credential first
 373     credential = api.getDelegatedCredential(creds)
 374     if not credential:
 375         credential = api.getCredential()
 376     threads = ThreadManager()
 377     # fetch from aggregates
 378     for aggregate in api.aggregates:
 379         # prevent infinite loop. Dont send request back to caller
 380         # unless the caller is the aggregate's SM
 381         if caller_hrn == aggregate and aggregate != api.hrn:
 382             continue
 383         server = api.aggregates[aggregate]
 384         threads.run(_ListSlices, server, credential, call_id)
 385
 386     # combime results
 387     results = threads.get_results()
 388     slices = []
 389     for result in results:
 390         slices.extend(result)
 391
 392     # cache the result
 393     if caching and api.cache:
 394         api.cache.add('slices', slices)
 395
 396     return slices
 397
 398
 399 def get_ticket(api, xrn, creds, rspec, users):
 400     slice_hrn, type = urn_to_hrn(xrn)
 401     # get the netspecs contained within the clients rspec
 402     aggregate_rspecs = {}
 403     tree= etree.parse(StringIO(rspec))
 404     elements = tree.findall('./network')
 405     for element in elements:
 406         aggregate_hrn = element.values()[0]
 407         aggregate_rspecs[aggregate_hrn] = rspec
 408
 409     # get the callers hrn
 410     valid_cred = api.auth.checkCredentials(creds, 'getticket', slice_hrn)[0]
 411     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 412
 413     # attempt to use delegated credential first
 414     credential = api.getDelegatedCredential(creds)
 415     if not credential:
 416         credential = api.getCredential()
 417     threads = ThreadManager()
 418     for (aggregate, aggregate_rspec) in aggregate_rspecs.iteritems():
 419         # prevent infinite loop. Dont send request back to caller
 420         # unless the caller is the aggregate's SM
 421         if caller_hrn == aggregate and aggregate != api.hrn:
 422             continue
 423         server = None
 424         if aggregate in api.aggregates:
 425             server = api.aggregates[aggregate]
 426         else:
 427             net_urn = hrn_to_urn(aggregate, 'authority')
 428             # we may have a peer that knows about this aggregate
 429             for agg in api.aggregates:
 430                 target_aggs = api.aggregates[agg].get_aggregates(credential, net_urn)
 431                 if not target_aggs or not 'hrn' in target_aggs[0]:
 432                     continue
 433                 # send the request to this address
 434                 url = target_aggs[0]['url']
 435                 server = xmlrpcprotocol.get_server(url, api.key_file, api.cert_file, timeout=30)
 436                 # aggregate found, no need to keep looping
 437                 break
 438         if server is None:
 439             continue
 440         threads.run(server.GetTicket, xrn, credential, aggregate_rspec, users)
 441
 442     results = threads.get_results()
 443
 444     # gather information from each ticket
 445     rspecs = []
 446     initscripts = []
 447     slivers = []
 448     object_gid = None
 449     for result in results:
 450         agg_ticket = SfaTicket(string=result)
 451         attrs = agg_ticket.get_attributes()
 452         if not object_gid:
 453             object_gid = agg_ticket.get_gid_object()
 454         rspecs.append(agg_ticket.get_rspec())
 455         initscripts.extend(attrs.get('initscripts', []))
 456         slivers.extend(attrs.get('slivers', []))
 457
 458     # merge info
 459     attributes = {'initscripts': initscripts,
 460                  'slivers': slivers}
 461     merged_rspec = merge_rspecs(rspecs)
 462
 463     # create a new ticket
 464     ticket = SfaTicket(subject = slice_hrn)
 465     ticket.set_gid_caller(api.auth.client_gid)
 466     ticket.set_issuer(key=api.key, subject=api.hrn)
 467     ticket.set_gid_object(object_gid)
 468     ticket.set_pubkey(object_gid.get_pubkey())
 469     #new_ticket.set_parent(api.auth.hierarchy.get_auth_ticket(auth_hrn))
 470     ticket.set_attributes(attributes)
 471     ticket.set_rspec(merged_rspec)
 472     ticket.encode()
 473     ticket.sign()
 474     return ticket.save_to_string(save_parents=True)
 475
 476 def start_slice(api, xrn, creds):
 477     hrn, type = urn_to_hrn(xrn)
 478
 479     # get the callers hrn
 480     valid_cred = api.auth.checkCredentials(creds, 'startslice', hrn)[0]
 481     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 482
 483     # attempt to use delegated credential first
 484     credential = api.getDelegatedCredential(creds)
 485     if not credential:
 486         credential = api.getCredential()
 487     threads = ThreadManager()
 488     for aggregate in api.aggregates:
 489         # prevent infinite loop. Dont send request back to caller
 490         # unless the caller is the aggregate's SM
 491         if caller_hrn == aggregate and aggregate != api.hrn:
 492             continue
 493         server = api.aggregates[aggregate]
 494         threads.run(server.Start, xrn, credential)
 495     threads.get_results()
 496     return 1
 497
 498 def stop_slice(api, xrn, creds):
 499     hrn, type = urn_to_hrn(xrn)
 500
 501     # get the callers hrn
 502     valid_cred = api.auth.checkCredentials(creds, 'stopslice', hrn)[0]
 503     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 504
 505     # attempt to use delegated credential first
 506     credential = api.getDelegatedCredential(creds)
 507     if not credential:
 508         credential = api.getCredential()
 509     threads = ThreadManager()
 510     for aggregate in api.aggregates:
 511         # prevent infinite loop. Dont send request back to caller
 512         # unless the caller is the aggregate's SM
 513         if caller_hrn == aggregate and aggregate != api.hrn:
 514             continue
 515         server = api.aggregates[aggregate]
 516         threads.run(server.Stop, xrn, credential)
 517     threads.get_results()
 518     return 1
 519
 520 def reset_slice(api, xrn):
 521     """
 522     Not implemented
 523     """
 524     return 1
 525
 526 def shutdown(api, xrn, creds):
 527     """
 528     Not implemented
 529     """
 530     return 1
 531
 532 def status(api, xrn, creds):
 533     """
 534     Not implemented
 535     """
 536     return 1
 537
 538 def main():
 539     r = RSpec()
 540     r.parseFile(sys.argv[1])
 541     rspec = r.toDict()
 542     CreateSliver(None,'plc.princeton.tmacktestslice',rspec,'create-slice-tmacktestslice')
 543
 544 if __name__ == "__main__":
 545     main()
 546