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                 raise
 202             args = [xrn, credential, rspec, users]
 203             if _call_id_supported(api, server):
 204                 args.append(call_id)
 205             rspec = server.CreateSliver(*args)
 206             return {"aggregate": aggregate, "rspec": rspec, "elapsed": time.time()-tStart, "status": "success"}
 207         except:
 208             logger.log_exc('Something wrong in _CreateSliver with URL %s'%server.url)
 209             return {"aggregate": aggregate, "elapsed": time.time()-tStart, "status": "exception"}
 210
 211     if Callids().already_handled(call_id): return ""
 212     # Validate the RSpec against PlanetLab's schema --disabled for now
 213     # The schema used here needs to aggregate the PL and VINI schemas
 214     # schema = "/var/www/html/schemas/pl.rng"
 215     rspec = RSpec(rspec_str)
 216     schema = None
 217     if schema:
 218         rspec.validate(schema)
 219
 220     # if there is a <statistics> section, the aggregates don't care about it,
 221     # so delete it.
 222     drop_slicemgr_stats(rspec)
 223
 224     # attempt to use delegated credential first
 225     credential = api.getDelegatedCredential(creds)
 226     if not credential:
 227         credential = api.getCredential()
 228
 229     # get the callers hrn
 230     hrn, type = urn_to_hrn(xrn)
 231     valid_cred = api.auth.checkCredentials(creds, 'createsliver', hrn)[0]
 232     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 233     threads = ThreadManager()
 234     for aggregate in api.aggregates:
 235         # prevent infinite loop. Dont send request back to caller
 236         # unless the caller is the aggregate's SM
 237         if caller_hrn == aggregate and aggregate != api.hrn:
 238             continue
 239         server = api.aggregates[aggregate]
 240         # Just send entire RSpec to each aggregate
 241         threads.run(_CreateSliver, aggregate, server, xrn, credential, rspec.toxml(), users, call_id)
 242
 243     results = threads.get_results()
 244     manifest_version = version_manager._get_version(rspec.version.type, rspec.version.version, 'manifest')
 245     result_rspec = RSpec(version=manifest_version)
 246     for result in results:
 247         add_slicemgr_stat(result_rspec, "CreateSliver", result["aggregate"], result["elapsed"], result["status"])
 248         if result["status"]=="success":
 249             try:
 250                 result_rspec.version.merge(result["rspec"])
 251             except:
 252                 api.logger.log_exc("SM.CreateSliver: Failed to merge aggregate rspec")
 253     return result_rspec.toxml()
 254
 255 def RenewSliver(api, xrn, creds, expiration_time, call_id):
 256     def _RenewSliver(server, xrn, creds, expiration_time, call_id):
 257         server_version = api.get_cached_server_version(server)
 258         args =  [xrn, creds, expiration_time, call_id]
 259         if _call_id_supported(api, server):
 260             args.append(call_id)
 261         return server.RenewSliver(*args)
 262
 263     if Callids().already_handled(call_id): return True
 264
 265     (hrn, type) = urn_to_hrn(xrn)
 266     # get the callers hrn
 267     valid_cred = api.auth.checkCredentials(creds, 'renewsliver', hrn)[0]
 268     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 269
 270     # attempt to use delegated credential first
 271     credential = api.getDelegatedCredential(creds)
 272     if not credential:
 273         credential = api.getCredential()
 274     threads = ThreadManager()
 275     for aggregate in api.aggregates:
 276         # prevent infinite loop. Dont send request back to caller
 277         # unless the caller is the aggregate's SM
 278         if caller_hrn == aggregate and aggregate != api.hrn:
 279             continue
 280         server = api.aggregates[aggregate]
 281         threads.run(_RenewSliver, server, xrn, [credential], expiration_time, call_id)
 282     # 'and' the results
 283     return reduce (lambda x,y: x and y, threads.get_results() , True)
 284
 285 def DeleteSliver(api, xrn, creds, call_id):
 286     def _DeleteSliver(server, xrn, creds, call_id):
 287         server_version = api.get_cached_server_version(server)
 288         args =  [xrn, creds]
 289         if _call_id_supported(api, server):
 290             args.append(call_id)
 291         return server.DeleteSliver(*args)
 292
 293     if Callids().already_handled(call_id): return ""
 294     (hrn, type) = urn_to_hrn(xrn)
 295     # get the callers hrn
 296     valid_cred = api.auth.checkCredentials(creds, 'deletesliver', hrn)[0]
 297     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 298
 299     # attempt to use delegated credential first
 300     credential = api.getDelegatedCredential(creds)
 301     if not credential:
 302         credential = api.getCredential()
 303     threads = ThreadManager()
 304     for aggregate in api.aggregates:
 305         # prevent infinite loop. Dont send request back to caller
 306         # unless the caller is the aggregate's SM
 307         if caller_hrn == aggregate and aggregate != api.hrn:
 308             continue
 309         server = api.aggregates[aggregate]
 310         threads.run(_DeleteSliver, server, xrn, credential, call_id)
 311     threads.get_results()
 312     return 1
 313
 314
 315 # first draft at a merging SliverStatus
 316 def SliverStatus(api, slice_xrn, creds, call_id):
 317     def _SliverStatus(server, xrn, creds, call_id):
 318         server_version = api.get_cached_server_version(server)
 319         args =  [xrn, creds]
 320         if _call_id_supported(api, server):
 321             args.append(call_id)
 322         return server.SliverStatus(*args)
 323
 324     if Callids().already_handled(call_id): return {}
 325     # attempt to use delegated credential first
 326     credential = api.getDelegatedCredential(creds)
 327     if not credential:
 328         credential = api.getCredential()
 329     threads = ThreadManager()
 330     for aggregate in api.aggregates:
 331         server = api.aggregates[aggregate]
 332         threads.run (_SliverStatus, server, slice_xrn, credential, call_id)
 333     results = threads.get_results()
 334
 335     # get rid of any void result - e.g. when call_id was hit where by convention we return {}
 336     results = [ result for result in results if result and result['geni_resources']]
 337
 338     # do not try to combine if there's no result
 339     if not results : return {}
 340
 341     # otherwise let's merge stuff
 342     overall = {}
 343
 344     # mmh, it is expected that all results carry the same urn
 345     overall['geni_urn'] = results[0]['geni_urn']
 346     overall['pl_login'] = results[0]['pl_login']
 347     # append all geni_resources
 348     overall['geni_resources'] = \
 349         reduce (lambda x,y: x+y, [ result['geni_resources'] for result in results] , [])
 350     overall['status'] = 'unknown'
 351     if overall['geni_resources']:
 352         overall['status'] = 'ready'
 353
 354     return overall
 355
 356 caching=True
 357 #caching=False
 358 def ListSlices(api, creds, call_id):
 359     def _ListSlices(server, creds, call_id):
 360         server_version = api.get_cached_server_version(server)
 361         args =  [creds]
 362         if _call_id_supported(api, server):
 363             args.append(call_id)
 364         return server.ListSlices(*args)
 365
 366     if Callids().already_handled(call_id): return []
 367
 368     # look in cache first
 369     if caching and api.cache:
 370         slices = api.cache.get('slices')
 371         if slices:
 372             return slices
 373
 374     # get the callers hrn
 375     valid_cred = api.auth.checkCredentials(creds, 'listslices', None)[0]
 376     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 377
 378     # attempt to use delegated credential first
 379     credential = api.getDelegatedCredential(creds)
 380     if not credential:
 381         credential = api.getCredential()
 382     threads = ThreadManager()
 383     # fetch from aggregates
 384     for aggregate in api.aggregates:
 385         # prevent infinite loop. Dont send request back to caller
 386         # unless the caller is the aggregate's SM
 387         if caller_hrn == aggregate and aggregate != api.hrn:
 388             continue
 389         server = api.aggregates[aggregate]
 390         threads.run(_ListSlices, server, credential, call_id)
 391
 392     # combime results
 393     results = threads.get_results()
 394     slices = []
 395     for result in results:
 396         slices.extend(result)
 397
 398     # cache the result
 399     if caching and api.cache:
 400         api.cache.add('slices', slices)
 401
 402     return slices
 403
 404
 405 def get_ticket(api, xrn, creds, rspec, users):
 406     slice_hrn, type = urn_to_hrn(xrn)
 407     # get the netspecs contained within the clients rspec
 408     aggregate_rspecs = {}
 409     tree= etree.parse(StringIO(rspec))
 410     elements = tree.findall('./network')
 411     for element in elements:
 412         aggregate_hrn = element.values()[0]
 413         aggregate_rspecs[aggregate_hrn] = rspec
 414
 415     # get the callers hrn
 416     valid_cred = api.auth.checkCredentials(creds, 'getticket', slice_hrn)[0]
 417     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 418
 419     # attempt to use delegated credential first
 420     credential = api.getDelegatedCredential(creds)
 421     if not credential:
 422         credential = api.getCredential()
 423     threads = ThreadManager()
 424     for (aggregate, aggregate_rspec) in aggregate_rspecs.iteritems():
 425         # prevent infinite loop. Dont send request back to caller
 426         # unless the caller is the aggregate's SM
 427         if caller_hrn == aggregate and aggregate != api.hrn:
 428             continue
 429         server = None
 430         if aggregate in api.aggregates:
 431             server = api.aggregates[aggregate]
 432         else:
 433             net_urn = hrn_to_urn(aggregate, 'authority')
 434             # we may have a peer that knows about this aggregate
 435             for agg in api.aggregates:
 436                 target_aggs = api.aggregates[agg].get_aggregates(credential, net_urn)
 437                 if not target_aggs or not 'hrn' in target_aggs[0]:
 438                     continue
 439                 # send the request to this address
 440                 url = target_aggs[0]['url']
 441                 server = xmlrpcprotocol.get_server(url, api.key_file, api.cert_file, timeout=30)
 442                 # aggregate found, no need to keep looping
 443                 break
 444         if server is None:
 445             continue
 446         threads.run(server.GetTicket, xrn, credential, aggregate_rspec, users)
 447
 448     results = threads.get_results()
 449
 450     # gather information from each ticket
 451     rspecs = []
 452     initscripts = []
 453     slivers = []
 454     object_gid = None
 455     for result in results:
 456         agg_ticket = SfaTicket(string=result)
 457         attrs = agg_ticket.get_attributes()
 458         if not object_gid:
 459             object_gid = agg_ticket.get_gid_object()
 460         rspecs.append(agg_ticket.get_rspec())
 461         initscripts.extend(attrs.get('initscripts', []))
 462         slivers.extend(attrs.get('slivers', []))
 463
 464     # merge info
 465     attributes = {'initscripts': initscripts,
 466                  'slivers': slivers}
 467     merged_rspec = merge_rspecs(rspecs)
 468
 469     # create a new ticket
 470     ticket = SfaTicket(subject = slice_hrn)
 471     ticket.set_gid_caller(api.auth.client_gid)
 472     ticket.set_issuer(key=api.key, subject=api.hrn)
 473     ticket.set_gid_object(object_gid)
 474     ticket.set_pubkey(object_gid.get_pubkey())
 475     #new_ticket.set_parent(api.auth.hierarchy.get_auth_ticket(auth_hrn))
 476     ticket.set_attributes(attributes)
 477     ticket.set_rspec(merged_rspec)
 478     ticket.encode()
 479     ticket.sign()
 480     return ticket.save_to_string(save_parents=True)
 481
 482 def start_slice(api, xrn, creds):
 483     hrn, type = urn_to_hrn(xrn)
 484
 485     # get the callers hrn
 486     valid_cred = api.auth.checkCredentials(creds, 'startslice', hrn)[0]
 487     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 488
 489     # attempt to use delegated credential first
 490     credential = api.getDelegatedCredential(creds)
 491     if not credential:
 492         credential = api.getCredential()
 493     threads = ThreadManager()
 494     for aggregate in api.aggregates:
 495         # prevent infinite loop. Dont send request back to caller
 496         # unless the caller is the aggregate's SM
 497         if caller_hrn == aggregate and aggregate != api.hrn:
 498             continue
 499         server = api.aggregates[aggregate]
 500         threads.run(server.Start, xrn, credential)
 501     threads.get_results()
 502     return 1
 503
 504 def stop_slice(api, xrn, creds):
 505     hrn, type = urn_to_hrn(xrn)
 506
 507     # get the callers hrn
 508     valid_cred = api.auth.checkCredentials(creds, 'stopslice', hrn)[0]
 509     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 510
 511     # attempt to use delegated credential first
 512     credential = api.getDelegatedCredential(creds)
 513     if not credential:
 514         credential = api.getCredential()
 515     threads = ThreadManager()
 516     for aggregate in api.aggregates:
 517         # prevent infinite loop. Dont send request back to caller
 518         # unless the caller is the aggregate's SM
 519         if caller_hrn == aggregate and aggregate != api.hrn:
 520             continue
 521         server = api.aggregates[aggregate]
 522         threads.run(server.Stop, xrn, credential)
 523     threads.get_results()
 524     return 1
 525
 526 def reset_slice(api, xrn):
 527     """
 528     Not implemented
 529     """
 530     return 1
 531
 532 def shutdown(api, xrn, creds):
 533     """
 534     Not implemented
 535     """
 536     return 1
 537
 538 def status(api, xrn, creds):
 539     """
 540     Not implemented
 541     """
 542     return 1
 543
 544 def main():
 545     r = RSpec()
 546     r.parseFile(sys.argv[1])
 547     rspec = r.toDict()
 548     CreateSliver(None,'plc.princeton.tmacktestslice',rspec,'create-slice-tmacktestslice')
 549
 550 if __name__ == "__main__":
 551     main()
 552