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