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