sfa/managers/slice_manager_pl.py

   1 #
   2 import sys
   3 import time,datetime
   4 from StringIO import StringIO
   5 from types import StringTypes
   6 from copy import deepcopy
   7 from copy import copy
   8 from lxml import etree
   9
  10 from sfa.util.sfalogging import logger
  11 from sfa.util.rspecHelper import merge_rspecs
  12 from sfa.util.xrn import Xrn, urn_to_hrn, hrn_to_urn
  13 from sfa.util.plxrn import hrn_to_pl_slicename
  14 from sfa.util.rspec import *
  15 from sfa.util.specdict import *
  16 from sfa.util.faults import *
  17 from sfa.util.record import SfaRecord
  18 from sfa.rspecs.pg_rspec import PGRSpec
  19 from sfa.rspecs.sfa_rspec import SfaRSpec
  20 from sfa.rspecs.rspec_converter import RSpecConverter
  21 from sfa.rspecs.rspec_parser import parse_rspec
  22 from sfa.rspecs.rspec_version import RSpecVersion
  23 from sfa.rspecs.sfa_rspec import sfa_rspec_version
  24 from sfa.rspecs.pg_rspec import pg_rspec_ad_version, pg_rspec_request_version
  25 from sfa.util.policy import Policy
  26 from sfa.util.prefixTree import prefixTree
  27 from sfa.util.sfaticket import *
  28 from sfa.trust.credential import Credential
  29 from sfa.util.threadmanager import ThreadManager
  30 import sfa.util.xmlrpcprotocol as xmlrpcprotocol
  31 import sfa.plc.peers as peers
  32 from sfa.util.version import version_core
  33 from sfa.util.callids import Callids
  34
  35
  36 def _call_id_supported(api, server):
  37     """
  38     Returns true if server support the optional call_id arg, false otherwise.
  39     """
  40     server_version = api.get_cached_server_version(server)
  41
  42     if 'sfa' in server_version:
  43         code_tag = server_version['code_tag']
  44         code_tag_parts = code_tag.split("-")
  45
  46         version_parts = code_tag_parts[0].split(".")
  47         major, minor = version_parts[0:2]
  48         rev = code_tag_parts[1]
  49         if int(major) > 1:
  50             if int(minor) > 0 or int(rev) > 20:
  51                 return True
  52     return False
  53
  54 # we have specialized xmlrpclib.ServerProxy to remember the input url
  55 # OTOH it's not clear if we're only dealing with XMLRPCServerProxy instances
  56 def get_serverproxy_url (server):
  57     try:
  58         return server.url
  59     except:
  60         logger.warning("GetVersion, falling back to xmlrpclib.ServerProxy internals")
  61         return server._ServerProxy__host + server._ServerProxy__handler
  62
  63 def GetVersion(api):
  64     # peers explicitly in aggregates.xml
  65     peers =dict ([ (peername,get_serverproxy_url(v)) for (peername,v) in api.aggregates.iteritems()
  66                    if peername != api.hrn])
  67     xrn=Xrn (api.hrn)
  68     request_rspec_versions = [dict(pg_rspec_request_version), dict(sfa_rspec_version)]
  69     ad_rspec_versions = [dict(pg_rspec_ad_version), dict(sfa_rspec_version)]
  70     version_more = {'interface':'slicemgr',
  71                     'hrn' : xrn.get_hrn(),
  72                     'urn' : xrn.get_urn(),
  73                     'peers': peers,
  74                     'request_rspec_versions': request_rspec_versions,
  75                     'ad_rspec_versions': ad_rspec_versions,
  76                     'default_ad_rspec': dict(sfa_rspec_version)
  77                     }
  78     sm_version=version_core(version_more)
  79     # local aggregate if present needs to have localhost resolved
  80     if api.hrn in api.aggregates:
  81         local_am_url=get_serverproxy_url(api.aggregates[api.hrn])
  82         sm_version['peers'][api.hrn]=local_am_url.replace('localhost',sm_version['hostname'])
  83     return sm_version
  84
  85 def drop_slicemgr_stats(rspec):
  86     try:
  87         stats_elements = rspec.xml.xpath('//statistics')
  88         for node in stats_elements:
  89             node.getparent().remove(node)
  90     except Exception, e:
  91         api.logger.warn("drop_slicemgr_stats failed: %s " % (str(e)))
  92
  93 def add_slicemgr_stat(rspec, callname, aggname, elapsed, status):
  94     try:
  95         stats_tags = rspec.xml.xpath('//statistics[@call="%s"]' % callname)
  96         if stats_tags:
  97             stats_tag = stats_tags[0]
  98         else:
  99             stats_tag = etree.SubElement(rspec.xml, "statistics", call="ListResources")
 100
 101         etree.SubElement(stats_tag, "aggregate", name=str(aggname), elapsed=str(elapsed), status=str(status))
 102     except Exception, e:
 103         api.logger.warn("add_slicemgr_stat failed on  %s: %s" %(aggname, str(e)))
 104
 105 def ListResources(api, creds, options, call_id):
 106     def _ListResources(aggregate, server, credential, opts, call_id):
 107
 108         my_opts = copy(opts)
 109         args = [credential, my_opts]
 110         tStart = time.time()
 111         try:
 112             if _call_id_supported(api, server):
 113                 args.append(call_id)
 114             version = api.get_cached_server_version(server)
 115             # force ProtoGENI aggregates to give us a v2 RSpec
 116             if 'sfa' not in version.keys():
 117                 my_opts['rspec_version'] = pg_rspec_ad_version
 118             rspec = server.ListResources(*args)
 119             return {"aggregate": aggregate, "rspec": rspec, "elapsed": time.time()-tStart, "status": "success"}
 120         except Exception, e:
 121             api.logger.warn("ListResources failed at %s: %s" %(server.url, str(e)))
 122             return {"aggregate": aggregate, "elapsed": time.time()-tStart, "status": "exception"}
 123
 124     if Callids().already_handled(call_id): return ""
 125
 126     # get slice's hrn from options
 127     xrn = options.get('geni_slice_urn', '')
 128     (hrn, type) = urn_to_hrn(xrn)
 129     if 'geni_compressed' in options:
 130         del(options['geni_compressed'])
 131
 132     # get the rspec's return format from options
 133     rspec_version = RSpecVersion(options.get('rspec_version'))
 134     version_string = "rspec_%s" % (rspec_version.get_version_name())
 135
 136     # look in cache first
 137     if caching and api.cache and not xrn:
 138         rspec =  api.cache.get(version_string)
 139         if rspec:
 140             return rspec
 141
 142     # get the callers hrn
 143     valid_cred = api.auth.checkCredentials(creds, 'listnodes', hrn)[0]
 144     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 145
 146     # attempt to use delegated credential first
 147     credential = api.getDelegatedCredential(creds)
 148     if not credential:
 149         credential = api.getCredential()
 150     credentials = [credential]
 151     threads = ThreadManager()
 152     for aggregate in api.aggregates:
 153         # prevent infinite loop. Dont send request back to caller
 154         # unless the caller is the aggregate's SM
 155         if caller_hrn == aggregate and aggregate != api.hrn:
 156             continue
 157
 158         # get the rspec from the aggregate
 159         server = api.aggregates[aggregate]
 160         threads.run(_ListResources, aggregate, server, credentials, options, call_id)
 161
 162     results = threads.get_results()
 163     rspec_version = RSpecVersion(options.get('rspec_version'))
 164     if rspec_version['type'] == pg_rspec_ad_version['type']:
 165         rspec = PGRSpec()
 166     else:
 167         rspec = SfaRSpec()
 168
 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.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     def _CreateSliver(aggregate, server, xrn, credential, rspec, users, call_id):
 187         tStart = time.time()
 188         try:
 189             # Need to call GetVersion at an aggregate to determine the supported
 190             # rspec type/format beofre calling CreateSliver at an Aggregate.
 191             server_version = api.get_cached_server_version(server)
 192             if 'sfa' not in server_version and 'geni_api' in server_version:
 193                 # sfa aggregtes support both sfa and pg rspecs, no need to convert
 194                 # if aggregate supports sfa rspecs. otherwise convert to pg rspec
 195                 rspec = RSpecConverter.to_pg_rspec(rspec)
 196             args = [xrn, credential, rspec, users]
 197             if _call_id_supported(api, server):
 198                 args.append(call_id)
 199             rspec = server.CreateSliver(*args)
 200             return {"aggregate": aggregate, "rspec": rspec, "elapsed": time.time()-tStart, "status": "success"}
 201         except:
 202             logger.log_exc('Something wrong in _CreateSliver with URL %s'%server.url)
 203             return {"aggregate": aggregate, "elapsed": time.time()-tStart, "status": "exception"}
 204
 205     if Callids().already_handled(call_id): return ""
 206     # Validate the RSpec against PlanetLab's schema --disabled for now
 207     # The schema used here needs to aggregate the PL and VINI schemas
 208     # schema = "/var/www/html/schemas/pl.rng"
 209     rspec = parse_rspec(rspec_str)
 210     schema = None
 211     if schema:
 212         rspec.validate(schema)
 213
 214     # if there is a <statistics> section, the aggregates don't care about it,
 215     # so delete it.
 216     drop_slicemgr_stats(rspec)
 217
 218     # attempt to use delegated credential first
 219     credential = api.getDelegatedCredential(creds)
 220     if not credential:
 221         credential = api.getCredential()
 222
 223     # get the callers hrn
 224     hrn, type = urn_to_hrn(xrn)
 225     valid_cred = api.auth.checkCredentials(creds, 'createsliver', hrn)[0]
 226     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 227     threads = ThreadManager()
 228     for aggregate in api.aggregates:
 229         # prevent infinite loop. Dont send request back to caller
 230         # unless the caller is the aggregate's SM
 231         if caller_hrn == aggregate and aggregate != api.hrn:
 232             continue
 233         server = api.aggregates[aggregate]
 234         # Just send entire RSpec to each aggregate
 235         threads.run(_CreateSliver, aggregate, server, xrn, credential, rspec.toxml(), users, call_id)
 236
 237     results = threads.get_results()
 238     rspec = SfaRSpec()
 239     for result in results:
 240         add_slicemgr_stat(rspec, "CreateSliver", result["aggregate"], result["elapsed"], result["status"])
 241         if result["status"]=="success":
 242             try:
 243                 rspec.merge(result["rspec"])
 244             except:
 245                 api.logger.log_exc("SM.CreateSliver: Failed to merge aggregate rspec")
 246     return rspec.toxml()
 247
 248 def RenewSliver(api, xrn, creds, expiration_time, call_id):
 249     def _RenewSliver(server, xrn, creds, expiration_time, call_id):
 250         server_version = api.get_cached_server_version(server)
 251         args =  [xrn, creds, expiration_time, call_id]
 252         if _call_id_supported(api, server):
 253             args.append(call_id)
 254         return server.RenewSliver(*args)
 255
 256     if Callids().already_handled(call_id): return True
 257
 258     (hrn, type) = urn_to_hrn(xrn)
 259     # get the callers hrn
 260     valid_cred = api.auth.checkCredentials(creds, 'renewsliver', hrn)[0]
 261     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 262
 263     # attempt to use delegated credential first
 264     credential = api.getDelegatedCredential(creds)
 265     if not credential:
 266         credential = api.getCredential()
 267     threads = ThreadManager()
 268     for aggregate in api.aggregates:
 269         # prevent infinite loop. Dont send request back to caller
 270         # unless the caller is the aggregate's SM
 271         if caller_hrn == aggregate and aggregate != api.hrn:
 272             continue
 273         server = api.aggregates[aggregate]
 274         threads.run(_RenewSliver, server, xrn, [credential], expiration_time, call_id)
 275     # 'and' the results
 276     return reduce (lambda x,y: x and y, threads.get_results() , True)
 277
 278 def DeleteSliver(api, xrn, creds, call_id):
 279     def _DeleteSliver(server, xrn, creds, call_id):
 280         server_version = api.get_cached_server_version(server)
 281         args =  [xrn, creds]
 282         if _call_id_supported(api, server):
 283             args.append(call_id)
 284         return server.DeleteSliver(*args)
 285
 286     if Callids().already_handled(call_id): return ""
 287     (hrn, type) = urn_to_hrn(xrn)
 288     # get the callers hrn
 289     valid_cred = api.auth.checkCredentials(creds, 'deletesliver', hrn)[0]
 290     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 291
 292     # attempt to use delegated credential first
 293     credential = api.getDelegatedCredential(creds)
 294     if not credential:
 295         credential = api.getCredential()
 296     threads = ThreadManager()
 297     for aggregate in api.aggregates:
 298         # prevent infinite loop. Dont send request back to caller
 299         # unless the caller is the aggregate's SM
 300         if caller_hrn == aggregate and aggregate != api.hrn:
 301             continue
 302         server = api.aggregates[aggregate]
 303         threads.run(_DeleteSliver, server, xrn, credential, call_id)
 304     threads.get_results()
 305     return 1
 306
 307
 308 # first draft at a merging SliverStatus
 309 def SliverStatus(api, slice_xrn, creds, call_id):
 310     def _SliverStatus(server, xrn, creds, call_id):
 311         server_version = api.get_cached_server_version(server)
 312         args =  [xrn, creds]
 313         if _call_id_supported(api, server):
 314             args.append(call_id)
 315         return server.SliverStatus(*args)
 316
 317     if Callids().already_handled(call_id): return {}
 318     # attempt to use delegated credential first
 319     credential = api.getDelegatedCredential(creds)
 320     if not credential:
 321         credential = api.getCredential()
 322     threads = ThreadManager()
 323     for aggregate in api.aggregates:
 324         server = api.aggregates[aggregate]
 325         threads.run (_SliverStatus, server, slice_xrn, credential, call_id)
 326     results = threads.get_results()
 327
 328     # get rid of any void result - e.g. when call_id was hit where by convention we return {}
 329     results = [ result for result in results if result and result['geni_resources']]
 330
 331     # do not try to combine if there's no result
 332     if not results : return {}
 333
 334     # otherwise let's merge stuff
 335     overall = {}
 336
 337     # mmh, it is expected that all results carry the same urn
 338     overall['geni_urn'] = results[0]['geni_urn']
 339     overall['pl_login'] = results[0]['pl_login']
 340     # append all geni_resources
 341     overall['geni_resources'] = \
 342         reduce (lambda x,y: x+y, [ result['geni_resources'] for result in results] , [])
 343     overall['status'] = 'unknown'
 344     if overall['geni_resources']:
 345         overall['status'] = 'ready'
 346
 347     return overall
 348
 349 caching=True
 350 #caching=False
 351 def ListSlices(api, creds, call_id):
 352     def _ListSlices(server, creds, call_id):
 353         server_version = api.get_cached_server_version(api, server)
 354         args =  [creds]
 355         if _call_id_supported(api, server):
 356             args.append(call_id)
 357         return server.ListSlices(*args)
 358
 359     if Callids().already_handled(call_id): return []
 360
 361     # look in cache first
 362     if caching and api.cache:
 363         slices = api.cache.get('slices')
 364         if slices:
 365             return slices
 366
 367     # get the callers hrn
 368     valid_cred = api.auth.checkCredentials(creds, 'listslices', None)[0]
 369     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 370
 371     # attempt to use delegated credential first
 372     credential = api.getDelegatedCredential(creds)
 373     if not credential:
 374         credential = api.getCredential()
 375     threads = ThreadManager()
 376     # fetch from aggregates
 377     for aggregate in api.aggregates:
 378         # prevent infinite loop. Dont send request back to caller
 379         # unless the caller is the aggregate's SM
 380         if caller_hrn == aggregate and aggregate != api.hrn:
 381             continue
 382         server = api.aggregates[aggregate]
 383         threads.run(_ListSlices, server, credential, call_id)
 384
 385     # combime results
 386     results = threads.get_results()
 387     slices = []
 388     for result in results:
 389         slices.extend(result)
 390
 391     # cache the result
 392     if caching and api.cache:
 393         api.cache.add('slices', slices)
 394
 395     return slices
 396
 397
 398 def get_ticket(api, xrn, creds, rspec, users):
 399     slice_hrn, type = urn_to_hrn(xrn)
 400     # get the netspecs contained within the clients rspec
 401     aggregate_rspecs = {}
 402     tree= etree.parse(StringIO(rspec))
 403     elements = tree.findall('./network')
 404     for element in elements:
 405         aggregate_hrn = element.values()[0]
 406         aggregate_rspecs[aggregate_hrn] = rspec
 407
 408     # get the callers hrn
 409     valid_cred = api.auth.checkCredentials(creds, 'getticket', slice_hrn)[0]
 410     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 411
 412     # attempt to use delegated credential first
 413     credential = api.getDelegatedCredential(creds)
 414     if not credential:
 415         credential = api.getCredential()
 416     threads = ThreadManager()
 417     for (aggregate, aggregate_rspec) in aggregate_rspecs.iteritems():
 418         # prevent infinite loop. Dont send request back to caller
 419         # unless the caller is the aggregate's SM
 420         if caller_hrn == aggregate and aggregate != api.hrn:
 421             continue
 422         server = None
 423         if aggregate in api.aggregates:
 424             server = api.aggregates[aggregate]
 425         else:
 426             net_urn = hrn_to_urn(aggregate, 'authority')
 427             # we may have a peer that knows about this aggregate
 428             for agg in api.aggregates:
 429                 target_aggs = api.aggregates[agg].get_aggregates(credential, net_urn)
 430                 if not target_aggs or not 'hrn' in target_aggs[0]:
 431                     continue
 432                 # send the request to this address
 433                 url = target_aggs[0]['url']
 434                 server = xmlrpcprotocol.get_server(url, api.key_file, api.cert_file, timeout=30)
 435                 # aggregate found, no need to keep looping
 436                 break
 437         if server is None:
 438             continue
 439         threads.run(server.GetTicket, xrn, credential, aggregate_rspec, users)
 440
 441     results = threads.get_results()
 442
 443     # gather information from each ticket
 444     rspecs = []
 445     initscripts = []
 446     slivers = []
 447     object_gid = None
 448     for result in results:
 449         agg_ticket = SfaTicket(string=result)
 450         attrs = agg_ticket.get_attributes()
 451         if not object_gid:
 452             object_gid = agg_ticket.get_gid_object()
 453         rspecs.append(agg_ticket.get_rspec())
 454         initscripts.extend(attrs.get('initscripts', []))
 455         slivers.extend(attrs.get('slivers', []))
 456
 457     # merge info
 458     attributes = {'initscripts': initscripts,
 459                  'slivers': slivers}
 460     merged_rspec = merge_rspecs(rspecs)
 461
 462     # create a new ticket
 463     ticket = SfaTicket(subject = slice_hrn)
 464     ticket.set_gid_caller(api.auth.client_gid)
 465     ticket.set_issuer(key=api.key, subject=api.hrn)
 466     ticket.set_gid_object(object_gid)
 467     ticket.set_pubkey(object_gid.get_pubkey())
 468     #new_ticket.set_parent(api.auth.hierarchy.get_auth_ticket(auth_hrn))
 469     ticket.set_attributes(attributes)
 470     ticket.set_rspec(merged_rspec)
 471     ticket.encode()
 472     ticket.sign()
 473     return ticket.save_to_string(save_parents=True)
 474
 475 def start_slice(api, xrn, creds):
 476     hrn, type = urn_to_hrn(xrn)
 477
 478     # get the callers hrn
 479     valid_cred = api.auth.checkCredentials(creds, 'startslice', hrn)[0]
 480     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 481
 482     # attempt to use delegated credential first
 483     credential = api.getDelegatedCredential(creds)
 484     if not credential:
 485         credential = api.getCredential()
 486     threads = ThreadManager()
 487     for aggregate in api.aggregates:
 488         # prevent infinite loop. Dont send request back to caller
 489         # unless the caller is the aggregate's SM
 490         if caller_hrn == aggregate and aggregate != api.hrn:
 491             continue
 492         server = api.aggregates[aggregate]
 493         threads.run(server.Start, xrn, credential)
 494     threads.get_results()
 495     return 1
 496
 497 def stop_slice(api, xrn, creds):
 498     hrn, type = urn_to_hrn(xrn)
 499
 500     # get the callers hrn
 501     valid_cred = api.auth.checkCredentials(creds, 'stopslice', hrn)[0]
 502     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 503
 504     # attempt to use delegated credential first
 505     credential = api.getDelegatedCredential(creds)
 506     if not credential:
 507         credential = api.getCredential()
 508     threads = ThreadManager()
 509     for aggregate in api.aggregates:
 510         # prevent infinite loop. Dont send request back to caller
 511         # unless the caller is the aggregate's SM
 512         if caller_hrn == aggregate and aggregate != api.hrn:
 513             continue
 514         server = api.aggregates[aggregate]
 515         threads.run(server.Stop, xrn, credential)
 516     threads.get_results()
 517     return 1
 518
 519 def reset_slice(api, xrn):
 520     """
 521     Not implemented
 522     """
 523     return 1
 524
 525 def shutdown(api, xrn, creds):
 526     """
 527     Not implemented
 528     """
 529     return 1
 530
 531 def status(api, xrn, creds):
 532     """
 533     Not implemented
 534     """
 535     return 1
 536
 537 def main():
 538     r = RSpec()
 539     r.parseFile(sys.argv[1])
 540     rspec = r.toDict()
 541     CreateSliver(None,'plc.princeton.tmacktestslice',rspec,'create-slice-tmacktestslice')
 542
 543 if __name__ == "__main__":
 544     main()
 545