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