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 sfa_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.sfa_rspec import SfaRSpec
  19 from sfa.util.policy import Policy
  20 from sfa.util.prefixTree import prefixTree
  21 from sfa.util.sfaticket import *
  22 from sfa.trust.credential import Credential
  23 from sfa.util.threadmanager import ThreadManager
  24 import sfa.util.xmlrpcprotocol as xmlrpcprotocol
  25 import sfa.plc.peers as peers
  26 from sfa.util.version import version_core
  27 from sfa.util.callids import Callids
  28
  29 # we have specialized xmlrpclib.ServerProxy to remember the input url
  30 # OTOH it's not clear if we're only dealing with XMLRPCServerProxy instances
  31 def get_serverproxy_url (server):
  32     try:
  33         return server.url
  34     except:
  35         sfa_logger().warning("GetVersion, falling back to xmlrpclib.ServerProxy internals")
  36         return server._ServerProxy__host + server._ServerProxy__handler
  37
  38 def GetVersion(api):
  39     # peers explicitly in aggregates.xml
  40     peers =dict ([ (peername,get_serverproxy_url(v)) for (peername,v) in api.aggregates.iteritems()
  41                    if peername != api.hrn])
  42     xrn=Xrn (api.hrn)
  43     sm_version=version_core({'interface':'slicemgr',
  44                              'hrn' : xrn.get_hrn(),
  45                              'urn' : xrn.get_urn(),
  46                              'peers': peers,
  47                              })
  48     # local aggregate if present needs to have localhost resolved
  49     if api.hrn in api.aggregates:
  50         local_am_url=get_serverproxy_url(api.aggregates[api.hrn])
  51         sm_version['peers'][api.hrn]=local_am_url.replace('localhost',sm_version['hostname'])
  52     return sm_version
  53
  54 def CreateSliver(api, xrn, creds, rspec, users, call_id):
  55
  56     if Callids().already_handled(call_id): return ""
  57
  58     hrn, type = urn_to_hrn(xrn)
  59
  60     # Validate the RSpec against PlanetLab's schema --disabled for now
  61     # The schema used here needs to aggregate the PL and VINI schemas
  62     # schema = "/var/www/html/schemas/pl.rng"
  63     schema = None
  64     if schema:
  65         try:
  66             tree = etree.parse(StringIO(rspec))
  67         except etree.XMLSyntaxError:
  68             message = str(sys.exc_info()[1])
  69             raise InvalidRSpec(message)
  70
  71         relaxng_doc = etree.parse(schema)
  72         relaxng = etree.RelaxNG(relaxng_doc)
  73
  74         if not relaxng(tree):
  75             error = relaxng.error_log.last_error
  76             message = "%s (line %s)" % (error.message, error.line)
  77             raise InvalidRSpec(message)
  78
  79     # get the callers hrn
  80     valid_cred = api.auth.checkCredentials(creds, 'createsliver', hrn)[0]
  81     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
  82
  83     # attempt to use delegated credential first
  84     credential = api.getDelegatedCredential(creds)
  85     if not credential:
  86         credential = api.getCredential()
  87     threads = ThreadManager()
  88     for aggregate in api.aggregates:
  89         # prevent infinite loop. Dont send request back to caller
  90         # unless the caller is the aggregate's SM
  91         if caller_hrn == aggregate and aggregate != api.hrn:
  92             continue
  93
  94         # Just send entire RSpec to each aggregate
  95         server = api.aggregates[aggregate]
  96         threads.run(server.CreateSliver, xrn, credential, rspec, users, call_id)
  97
  98     results = threads.get_results()
  99     rspec = SfaRSpec()
 100     for result in results:
 101         rspec.merge(result)
 102     return rspec
 103
 104 def RenewSliver(api, xrn, creds, expiration_time, call_id):
 105     if Callids().already_handled(call_id): return True
 106
 107     (hrn, type) = urn_to_hrn(xrn)
 108     # get the callers hrn
 109     valid_cred = api.auth.checkCredentials(creds, 'renewsliver', hrn)[0]
 110     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 111
 112     # attempt to use delegated credential first
 113     credential = api.getDelegatedCredential(creds)
 114     if not credential:
 115         credential = api.getCredential()
 116     threads = ThreadManager()
 117     for aggregate in api.aggregates:
 118         # prevent infinite loop. Dont send request back to caller
 119         # unless the caller is the aggregate's SM
 120         if caller_hrn == aggregate and aggregate != api.hrn:
 121             continue
 122
 123         server = api.aggregates[aggregate]
 124         threads.run(server.RenewSliver, xrn, [credential], expiration_time, call_id)
 125     # 'and' the results
 126     return reduce (lambda x,y: x and y, threads.get_results() , True)
 127
 128 def get_ticket(api, xrn, creds, rspec, users):
 129     slice_hrn, type = urn_to_hrn(xrn)
 130     # get the netspecs contained within the clients rspec
 131     aggregate_rspecs = {}
 132     tree= etree.parse(StringIO(rspec))
 133     elements = tree.findall('./network')
 134     for element in elements:
 135         aggregate_hrn = element.values()[0]
 136         aggregate_rspecs[aggregate_hrn] = rspec
 137
 138     # get the callers hrn
 139     valid_cred = api.auth.checkCredentials(creds, 'getticket', slice_hrn)[0]
 140     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 141
 142     # attempt to use delegated credential first
 143     credential = api.getDelegatedCredential(creds)
 144     if not credential:
 145         credential = api.getCredential()
 146     threads = ThreadManager()
 147     for (aggregate, aggregate_rspec) in aggregate_rspecs.iteritems():
 148         # prevent infinite loop. Dont send request back to caller
 149         # unless the caller is the aggregate's SM
 150         if caller_hrn == aggregate and aggregate != api.hrn:
 151             continue
 152         server = None
 153         if aggregate in api.aggregates:
 154             server = api.aggregates[aggregate]
 155         else:
 156             net_urn = hrn_to_urn(aggregate, 'authority')
 157             # we may have a peer that knows about this aggregate
 158             for agg in api.aggregates:
 159                 target_aggs = api.aggregates[agg].get_aggregates(credential, net_urn)
 160                 if not target_aggs or not 'hrn' in target_aggs[0]:
 161                     continue
 162                 # send the request to this address
 163                 url = target_aggs[0]['url']
 164                 server = xmlrpcprotocol.get_server(url, api.key_file, api.cert_file)
 165                 # aggregate found, no need to keep looping
 166                 break
 167         if server is None:
 168             continue
 169         threads.run(server.GetTicket, xrn, credential, aggregate_rspec, users)
 170
 171     results = threads.get_results()
 172
 173     # gather information from each ticket
 174     rspecs = []
 175     initscripts = []
 176     slivers = []
 177     object_gid = None
 178     for result in results:
 179         agg_ticket = SfaTicket(string=result)
 180         attrs = agg_ticket.get_attributes()
 181         if not object_gid:
 182             object_gid = agg_ticket.get_gid_object()
 183         rspecs.append(agg_ticket.get_rspec())
 184         initscripts.extend(attrs.get('initscripts', []))
 185         slivers.extend(attrs.get('slivers', []))
 186
 187     # merge info
 188     attributes = {'initscripts': initscripts,
 189                  'slivers': slivers}
 190     merged_rspec = merge_rspecs(rspecs)
 191
 192     # create a new ticket
 193     ticket = SfaTicket(subject = slice_hrn)
 194     ticket.set_gid_caller(api.auth.client_gid)
 195     ticket.set_issuer(key=api.key, subject=api.hrn)
 196     ticket.set_gid_object(object_gid)
 197     ticket.set_pubkey(object_gid.get_pubkey())
 198     #new_ticket.set_parent(api.auth.hierarchy.get_auth_ticket(auth_hrn))
 199     ticket.set_attributes(attributes)
 200     ticket.set_rspec(merged_rspec)
 201     ticket.encode()
 202     ticket.sign()
 203     return ticket.save_to_string(save_parents=True)
 204
 205
 206 def DeleteSliver(api, xrn, creds, call_id):
 207     if Callids().already_handled(call_id): return ""
 208     (hrn, type) = urn_to_hrn(xrn)
 209     # get the callers hrn
 210     valid_cred = api.auth.checkCredentials(creds, 'deletesliver', hrn)[0]
 211     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 212
 213     # attempt to use delegated credential first
 214     credential = api.getDelegatedCredential(creds)
 215     if not credential:
 216         credential = api.getCredential()
 217     threads = ThreadManager()
 218     for aggregate in api.aggregates:
 219         # prevent infinite loop. Dont send request back to caller
 220         # unless the caller is the aggregate's SM
 221         if caller_hrn == aggregate and aggregate != api.hrn:
 222             continue
 223         server = api.aggregates[aggregate]
 224         threads.run(server.DeleteSliver, xrn, credential, call_id)
 225     threads.get_results()
 226     return 1
 227
 228 def start_slice(api, xrn, creds):
 229     hrn, type = urn_to_hrn(xrn)
 230
 231     # get the callers hrn
 232     valid_cred = api.auth.checkCredentials(creds, 'startslice', hrn)[0]
 233     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 234
 235     # attempt to use delegated credential first
 236     credential = api.getDelegatedCredential(creds)
 237     if not credential:
 238         credential = api.getCredential()
 239     threads = ThreadManager()
 240     for aggregate in api.aggregates:
 241         # prevent infinite loop. Dont send request back to caller
 242         # unless the caller is the aggregate's SM
 243         if caller_hrn == aggregate and aggregate != api.hrn:
 244             continue
 245         server = api.aggregates[aggregate]
 246         threads.run(server.Start, xrn, credential)
 247     threads.get_results()
 248     return 1
 249
 250 def stop_slice(api, xrn, creds):
 251     hrn, type = urn_to_hrn(xrn)
 252
 253     # get the callers hrn
 254     valid_cred = api.auth.checkCredentials(creds, 'stopslice', hrn)[0]
 255     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 256
 257     # attempt to use delegated credential first
 258     credential = api.getDelegatedCredential(creds)
 259     if not credential:
 260         credential = api.getCredential()
 261     threads = ThreadManager()
 262     for aggregate in api.aggregates:
 263         # prevent infinite loop. Dont send request back to caller
 264         # unless the caller is the aggregate's SM
 265         if caller_hrn == aggregate and aggregate != api.hrn:
 266             continue
 267         server = api.aggregates[aggregate]
 268         threads.run(server.Stop, xrn, credential)
 269     threads.get_results()
 270     return 1
 271
 272 def reset_slice(api, xrn):
 273     """
 274     Not implemented
 275     """
 276     return 1
 277
 278 def shutdown(api, xrn, creds):
 279     """
 280     Not implemented
 281     """
 282     return 1
 283
 284 def status(api, xrn, creds):
 285     """
 286     Not implemented
 287     """
 288     return 1
 289
 290 # Thierry : caching at the slicemgr level makes sense to some extent
 291 caching=True
 292 #caching=False
 293 def ListSlices(api, creds, call_id):
 294
 295     if Callids().already_handled(call_id): return []
 296
 297     # look in cache first
 298     if caching and api.cache:
 299         slices = api.cache.get('slices')
 300         if slices:
 301             return slices
 302
 303     # get the callers hrn
 304     valid_cred = api.auth.checkCredentials(creds, 'listslices', None)[0]
 305     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 306
 307     # attempt to use delegated credential first
 308     credential = api.getDelegatedCredential(creds)
 309     if not credential:
 310         credential = api.getCredential()
 311     threads = ThreadManager()
 312     # fetch from aggregates
 313     for aggregate in api.aggregates:
 314         # prevent infinite loop. Dont send request back to caller
 315         # unless the caller is the aggregate's SM
 316         if caller_hrn == aggregate and aggregate != api.hrn:
 317             continue
 318         server = api.aggregates[aggregate]
 319         threads.run(server.ListSlices, credential, call_id)
 320
 321     # combime results
 322     results = threads.get_results()
 323     slices = []
 324     for result in results:
 325         slices.extend(result)
 326
 327     # cache the result
 328     if caching and api.cache:
 329         api.cache.add('slices', slices)
 330
 331     return slices
 332
 333
 334 def ListResources(api, creds, options, call_id):
 335
 336     if Callids().already_handled(call_id): return ""
 337
 338     # get slice's hrn from options
 339     xrn = options.get('geni_slice_urn', '')
 340     (hrn, type) = urn_to_hrn(xrn)
 341
 342     # get hrn of the original caller
 343     origin_hrn = options.get('origin_hrn', None)
 344     if not origin_hrn:
 345         if isinstance(creds, list):
 346             origin_hrn = Credential(string=creds[0]).get_gid_caller().get_hrn()
 347         else:
 348             origin_hrn = Credential(string=creds).get_gid_caller().get_hrn()
 349
 350     # look in cache first
 351     if caching and api.cache and not xrn:
 352         rspec =  api.cache.get('nodes')
 353         if rspec:
 354             return rspec
 355
 356     # get the callers hrn
 357     valid_cred = api.auth.checkCredentials(creds, 'listnodes', hrn)[0]
 358     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 359
 360     # attempt to use delegated credential first
 361     credential = api.getDelegatedCredential(creds)
 362     if not credential:
 363         credential = api.getCredential()
 364     threads = ThreadManager()
 365     for aggregate in api.aggregates:
 366         # prevent infinite loop. Dont send request back to caller
 367         # unless the caller is the aggregate's SM
 368         if caller_hrn == aggregate and aggregate != api.hrn:
 369             continue
 370         # get the rspec from the aggregate
 371         server = api.aggregates[aggregate]
 372         my_opts = copy(options)
 373         my_opts['geni_compressed'] = False
 374         threads.run(server.ListResources, credential, my_opts, call_id)
 375         #threads.run(server.get_resources, cred, xrn, origin_hrn)
 376
 377     results = threads.get_results()
 378     rspec = SfaRSpec()
 379     for result in results:
 380         rspec.merge(result)
 381
 382     # cache the result
 383     if caching and api.cache and not xrn:
 384         api.cache.add('nodes', rspec)
 385
 386     return rspec.toxml()
 387
 388 # first draft at a merging SliverStatus
 389 def SliverStatus(api, slice_xrn, creds, call_id):
 390     if Callids().already_handled(call_id): return {}
 391     # attempt to use delegated credential first
 392     credential = api.getDelegatedCredential(creds)
 393     if not credential:
 394         credential = api.getCredential()
 395     threads = ThreadManager()
 396     for aggregate in api.aggregates:
 397         server = api.aggregates[aggregate]
 398         threads.run (server.SliverStatus, slice_xrn, credential, call_id)
 399     results = threads.get_results()
 400
 401     # get rid of any void result - e.g. when call_id was hit where by convention we return {}
 402     results = [ result for result in results if result and result['geni_resources']]
 403
 404     # do not try to combine if there's no result
 405     if not results : return {}
 406
 407     # otherwise let's merge stuff
 408     overall = {}
 409
 410     # mmh, it is expected that all results carry the same urn
 411     overall['geni_urn'] = results[0]['geni_urn']
 412
 413     # consolidate geni_status - simple model using max on a total order
 414     states = [ 'ready', 'configuring', 'failed', 'unknown' ]
 415     # hash name to index
 416     shash = dict ( zip ( states, range(len(states)) ) )
 417     def combine_status (x,y):
 418         return shash [ max (shash(x),shash(y)) ]
 419     overall['geni_status'] = reduce (combine_status, [ result['geni_status'] for result in results], 'ready' )
 420
 421     # {'ready':0,'configuring':1,'failed':2,'unknown':3}
 422     # append all geni_resources
 423     overall['geni_resources'] = \
 424         reduce (lambda x,y: x+y, [ result['geni_resources'] for result in results] , [])
 425
 426     return overall
 427
 428 def main():
 429     r = RSpec()
 430     r.parseFile(sys.argv[1])
 431     rspec = r.toDict()
 432     CreateSliver(None,'plc.princeton.tmacktestslice',rspec,'create-slice-tmacktestslice')
 433
 434 if __name__ == "__main__":
 435     main()
 436