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     manifest_version = version_manager._get_version(rspec_version.type, rspec_version.version, 'manifest')
 169     rspec = RSpec(version=manifest_version)
 170     for result in results:
 171         add_slicemgr_stat(rspec, "ListResources", result["aggregate"], result["elapsed"], result["status"])
 172         if result["status"]=="success":
 173             try:
 174                 rspec.version.merge(result["rspec"])
 175             except:
 176                 api.logger.log_exc("SM.ListResources: Failed to merge aggregate rspec")
 177
 178     # cache the result
 179     if caching and api.cache and not xrn:
 180         api.cache.add(version_string, rspec.toxml())
 181
 182     return rspec.toxml()
 183
 184
 185 def CreateSliver(api, xrn, creds, rspec_str, users, call_id):
 186
 187     version_manager = VersionManager()
 188     def _CreateSliver(aggregate, server, xrn, credential, rspec, users, call_id):
 189         tStart = time.time()
 190         try:
 191             # Need to call GetVersion at an aggregate to determine the supported
 192             # rspec type/format beofre calling CreateSliver at an Aggregate.
 193             server_version = api.get_cached_server_version(server)
 194             if 'sfa' not in server_version and 'geni_api' in server_version:
 195                 # sfa aggregtes support both sfa and pg rspecs, no need to convert
 196                 # if aggregate supports sfa rspecs. otherwise convert to pg rspec
 197                 rspec = RSpecConverter.to_pg_rspec(rspec)
 198             args = [xrn, credential, rspec, users]
 199             if _call_id_supported(api, server):
 200                 args.append(call_id)
 201             rspec = server.CreateSliver(*args)
 202             return {"aggregate": aggregate, "rspec": rspec, "elapsed": time.time()-tStart, "status": "success"}
 203         except:
 204             logger.log_exc('Something wrong in _CreateSliver with URL %s'%server.url)
 205             return {"aggregate": aggregate, "elapsed": time.time()-tStart, "status": "exception"}
 206
 207     if Callids().already_handled(call_id): return ""
 208     # Validate the RSpec against PlanetLab's schema --disabled for now
 209     # The schema used here needs to aggregate the PL and VINI schemas
 210     # schema = "/var/www/html/schemas/pl.rng"
 211     rspec = RSpec(rspec_str)
 212     schema = None
 213     if schema:
 214         rspec.validate(schema)
 215
 216     # if there is a <statistics> section, the aggregates don't care about it,
 217     # so delete it.
 218     drop_slicemgr_stats(rspec)
 219
 220     # attempt to use delegated credential first
 221     credential = api.getDelegatedCredential(creds)
 222     if not credential:
 223         credential = api.getCredential()
 224
 225     # get the callers hrn
 226     hrn, type = urn_to_hrn(xrn)
 227     valid_cred = api.auth.checkCredentials(creds, 'createsliver', hrn)[0]
 228     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 229     threads = ThreadManager()
 230     for aggregate in api.aggregates:
 231         # prevent infinite loop. Dont send request back to caller
 232         # unless the caller is the aggregate's SM
 233         if caller_hrn == aggregate and aggregate != api.hrn:
 234             continue
 235         server = api.aggregates[aggregate]
 236         # Just send entire RSpec to each aggregate
 237         threads.run(_CreateSliver, aggregate, server, xrn, credential, rspec.toxml(), users, call_id)
 238
 239     results = threads.get_results()
 240     manifest_version = version_manager._get_version(rspec.version.type, rspec.version.version, 'manifest')
 241     result_rspec = RSpec(version=manifest_version)
 242     for result in results:
 243         add_slicemgr_stat(rspec, "CreateSliver", result["aggregate"], result["elapsed"], result["status"])
 244         if result["status"]=="success":
 245             try:
 246                 result_rspec.version.merge(result["rspec"])
 247             except:
 248                 api.logger.log_exc("SM.CreateSliver: Failed to merge aggregate rspec")
 249     return rspec.toxml()
 250
 251 def RenewSliver(api, xrn, creds, expiration_time, call_id):
 252     def _RenewSliver(server, xrn, creds, expiration_time, call_id):
 253         server_version = api.get_cached_server_version(server)
 254         args =  [xrn, creds, expiration_time, call_id]
 255         if _call_id_supported(api, server):
 256             args.append(call_id)
 257         return server.RenewSliver(*args)
 258
 259     if Callids().already_handled(call_id): return True
 260
 261     (hrn, type) = urn_to_hrn(xrn)
 262     # get the callers hrn
 263     valid_cred = api.auth.checkCredentials(creds, 'renewsliver', hrn)[0]
 264     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 265
 266     # attempt to use delegated credential first
 267     credential = api.getDelegatedCredential(creds)
 268     if not credential:
 269         credential = api.getCredential()
 270     threads = ThreadManager()
 271     for aggregate in api.aggregates:
 272         # prevent infinite loop. Dont send request back to caller
 273         # unless the caller is the aggregate's SM
 274         if caller_hrn == aggregate and aggregate != api.hrn:
 275             continue
 276         server = api.aggregates[aggregate]
 277         threads.run(_RenewSliver, server, xrn, [credential], expiration_time, call_id)
 278     # 'and' the results
 279     return reduce (lambda x,y: x and y, threads.get_results() , True)
 280
 281 def DeleteSliver(api, xrn, creds, call_id):
 282     def _DeleteSliver(server, xrn, creds, call_id):
 283         server_version = api.get_cached_server_version(server)
 284         args =  [xrn, creds]
 285         if _call_id_supported(api, server):
 286             args.append(call_id)
 287         return server.DeleteSliver(*args)
 288
 289     if Callids().already_handled(call_id): return ""
 290     (hrn, type) = urn_to_hrn(xrn)
 291     # get the callers hrn
 292     valid_cred = api.auth.checkCredentials(creds, 'deletesliver', hrn)[0]
 293     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 294
 295     # attempt to use delegated credential first
 296     credential = api.getDelegatedCredential(creds)
 297     if not credential:
 298         credential = api.getCredential()
 299     threads = ThreadManager()
 300     for aggregate in api.aggregates:
 301         # prevent infinite loop. Dont send request back to caller
 302         # unless the caller is the aggregate's SM
 303         if caller_hrn == aggregate and aggregate != api.hrn:
 304             continue
 305         server = api.aggregates[aggregate]
 306         threads.run(_DeleteSliver, server, xrn, credential, call_id)
 307     threads.get_results()
 308     return 1
 309
 310
 311 # first draft at a merging SliverStatus
 312 def SliverStatus(api, slice_xrn, creds, call_id):
 313     def _SliverStatus(server, xrn, creds, call_id):
 314         server_version = api.get_cached_server_version(server)
 315         args =  [xrn, creds]
 316         if _call_id_supported(api, server):
 317             args.append(call_id)
 318         return server.SliverStatus(*args)
 319
 320     if Callids().already_handled(call_id): return {}
 321     # attempt to use delegated credential first
 322     credential = api.getDelegatedCredential(creds)
 323     if not credential:
 324         credential = api.getCredential()
 325     threads = ThreadManager()
 326     for aggregate in api.aggregates:
 327         server = api.aggregates[aggregate]
 328         threads.run (_SliverStatus, server, slice_xrn, credential, call_id)
 329     results = threads.get_results()
 330
 331     # get rid of any void result - e.g. when call_id was hit where by convention we return {}
 332     results = [ result for result in results if result and result['geni_resources']]
 333
 334     # do not try to combine if there's no result
 335     if not results : return {}
 336
 337     # otherwise let's merge stuff
 338     overall = {}
 339
 340     # mmh, it is expected that all results carry the same urn
 341     overall['geni_urn'] = results[0]['geni_urn']
 342     overall['pl_login'] = results[0]['pl_login']
 343     # append all geni_resources
 344     overall['geni_resources'] = \
 345         reduce (lambda x,y: x+y, [ result['geni_resources'] for result in results] , [])
 346     overall['status'] = 'unknown'
 347     if overall['geni_resources']:
 348         overall['status'] = 'ready'
 349
 350     return overall
 351
 352 caching=True
 353 #caching=False
 354 def ListSlices(api, creds, call_id):
 355     def _ListSlices(server, creds, call_id):
 356         server_version = api.get_cached_server_version(server)
 357         args =  [creds]
 358         if _call_id_supported(api, server):
 359             args.append(call_id)
 360         return server.ListSlices(*args)
 361
 362     if Callids().already_handled(call_id): return []
 363
 364     # look in cache first
 365     if caching and api.cache:
 366         slices = api.cache.get('slices')
 367         if slices:
 368             return slices
 369
 370     # get the callers hrn
 371     valid_cred = api.auth.checkCredentials(creds, 'listslices', None)[0]
 372     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 373
 374     # attempt to use delegated credential first
 375     credential = api.getDelegatedCredential(creds)
 376     if not credential:
 377         credential = api.getCredential()
 378     threads = ThreadManager()
 379     # fetch from aggregates
 380     for aggregate in api.aggregates:
 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 = api.aggregates[aggregate]
 386         threads.run(_ListSlices, server, credential, call_id)
 387
 388     # combime results
 389     results = threads.get_results()
 390     slices = []
 391     for result in results:
 392         slices.extend(result)
 393
 394     # cache the result
 395     if caching and api.cache:
 396         api.cache.add('slices', slices)
 397
 398     return slices
 399
 400
 401 def get_ticket(api, xrn, creds, rspec, users):
 402     slice_hrn, type = urn_to_hrn(xrn)
 403     # get the netspecs contained within the clients rspec
 404     aggregate_rspecs = {}
 405     tree= etree.parse(StringIO(rspec))
 406     elements = tree.findall('./network')
 407     for element in elements:
 408         aggregate_hrn = element.values()[0]
 409         aggregate_rspecs[aggregate_hrn] = rspec
 410
 411     # get the callers hrn
 412     valid_cred = api.auth.checkCredentials(creds, 'getticket', slice_hrn)[0]
 413     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 414
 415     # attempt to use delegated credential first
 416     credential = api.getDelegatedCredential(creds)
 417     if not credential:
 418         credential = api.getCredential()
 419     threads = ThreadManager()
 420     for (aggregate, aggregate_rspec) in aggregate_rspecs.iteritems():
 421         # prevent infinite loop. Dont send request back to caller
 422         # unless the caller is the aggregate's SM
 423         if caller_hrn == aggregate and aggregate != api.hrn:
 424             continue
 425         server = None
 426         if aggregate in api.aggregates:
 427             server = api.aggregates[aggregate]
 428         else:
 429             net_urn = hrn_to_urn(aggregate, 'authority')
 430             # we may have a peer that knows about this aggregate
 431             for agg in api.aggregates:
 432                 target_aggs = api.aggregates[agg].get_aggregates(credential, net_urn)
 433                 if not target_aggs or not 'hrn' in target_aggs[0]:
 434                     continue
 435                 # send the request to this address
 436                 url = target_aggs[0]['url']
 437                 server = xmlrpcprotocol.get_server(url, api.key_file, api.cert_file, timeout=30)
 438                 # aggregate found, no need to keep looping
 439                 break
 440         if server is None:
 441             continue
 442         threads.run(server.GetTicket, xrn, credential, aggregate_rspec, users)
 443
 444     results = threads.get_results()
 445
 446     # gather information from each ticket
 447     rspecs = []
 448     initscripts = []
 449     slivers = []
 450     object_gid = None
 451     for result in results:
 452         agg_ticket = SfaTicket(string=result)
 453         attrs = agg_ticket.get_attributes()
 454         if not object_gid:
 455             object_gid = agg_ticket.get_gid_object()
 456         rspecs.append(agg_ticket.get_rspec())
 457         initscripts.extend(attrs.get('initscripts', []))
 458         slivers.extend(attrs.get('slivers', []))
 459
 460     # merge info
 461     attributes = {'initscripts': initscripts,
 462                  'slivers': slivers}
 463     merged_rspec = merge_rspecs(rspecs)
 464
 465     # create a new ticket
 466     ticket = SfaTicket(subject = slice_hrn)
 467     ticket.set_gid_caller(api.auth.client_gid)
 468     ticket.set_issuer(key=api.key, subject=api.hrn)
 469     ticket.set_gid_object(object_gid)
 470     ticket.set_pubkey(object_gid.get_pubkey())
 471     #new_ticket.set_parent(api.auth.hierarchy.get_auth_ticket(auth_hrn))
 472     ticket.set_attributes(attributes)
 473     ticket.set_rspec(merged_rspec)
 474     ticket.encode()
 475     ticket.sign()
 476     return ticket.save_to_string(save_parents=True)
 477
 478 def start_slice(api, xrn, creds):
 479     hrn, type = urn_to_hrn(xrn)
 480
 481     # get the callers hrn
 482     valid_cred = api.auth.checkCredentials(creds, 'startslice', hrn)[0]
 483     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 484
 485     # attempt to use delegated credential first
 486     credential = api.getDelegatedCredential(creds)
 487     if not credential:
 488         credential = api.getCredential()
 489     threads = ThreadManager()
 490     for aggregate in api.aggregates:
 491         # prevent infinite loop. Dont send request back to caller
 492         # unless the caller is the aggregate's SM
 493         if caller_hrn == aggregate and aggregate != api.hrn:
 494             continue
 495         server = api.aggregates[aggregate]
 496         threads.run(server.Start, xrn, credential)
 497     threads.get_results()
 498     return 1
 499
 500 def stop_slice(api, xrn, creds):
 501     hrn, type = urn_to_hrn(xrn)
 502
 503     # get the callers hrn
 504     valid_cred = api.auth.checkCredentials(creds, 'stopslice', hrn)[0]
 505     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 506
 507     # attempt to use delegated credential first
 508     credential = api.getDelegatedCredential(creds)
 509     if not credential:
 510         credential = api.getCredential()
 511     threads = ThreadManager()
 512     for aggregate in api.aggregates:
 513         # prevent infinite loop. Dont send request back to caller
 514         # unless the caller is the aggregate's SM
 515         if caller_hrn == aggregate and aggregate != api.hrn:
 516             continue
 517         server = api.aggregates[aggregate]
 518         threads.run(server.Stop, xrn, credential)
 519     threads.get_results()
 520     return 1
 521
 522 def reset_slice(api, xrn):
 523     """
 524     Not implemented
 525     """
 526     return 1
 527
 528 def shutdown(api, xrn, creds):
 529     """
 530     Not implemented
 531     """
 532     return 1
 533
 534 def status(api, xrn, creds):
 535     """
 536     Not implemented
 537     """
 538     return 1
 539
 540 def main():
 541     r = RSpec()
 542     r.parseFile(sys.argv[1])
 543     rspec = r.toDict()
 544     CreateSliver(None,'plc.princeton.tmacktestslice',rspec,'create-slice-tmacktestslice')
 545
 546 if __name__ == "__main__":
 547     main()
 548