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.rspecs.rspec_version import RSpecVersion
  28 from sfa.util.callids import Callids
  29
  30 # we have specialized xmlrpclib.ServerProxy to remember the input url
  31 # OTOH it's not clear if we're only dealing with XMLRPCServerProxy instances
  32 def get_serverproxy_url (server):
  33     try:
  34         return server.url
  35     except:
  36         sfa_logger().warning("GetVersion, falling back to xmlrpclib.ServerProxy internals")
  37         return server._ServerProxy__host + server._ServerProxy__handler
  38
  39 def GetVersion(api):
  40     # peers explicitly in aggregates.xml
  41     peers =dict ([ (peername,get_serverproxy_url(v)) for (peername,v) in api.aggregates.iteritems()
  42                    if peername != api.hrn])
  43     xrn=Xrn (api.hrn)
  44     sm_version=version_core({'interface':'slicemgr',
  45                              'hrn' : xrn.get_hrn(),
  46                              'urn' : xrn.get_urn(),
  47                              'peers': peers,
  48                              })
  49     # local aggregate if present needs to have localhost resolved
  50     if api.hrn in api.aggregates:
  51         local_am_url=get_serverproxy_url(api.aggregates[api.hrn])
  52         sm_version['peers'][api.hrn]=local_am_url.replace('localhost',sm_version['hostname'])
  53     return sm_version
  54
  55 def CreateSliver(api, xrn, creds, rspec, users, call_id):
  56
  57     if Callids().already_handled(call_id): return ""
  58
  59     hrn, type = urn_to_hrn(xrn)
  60
  61     # Validate the RSpec against PlanetLab's schema --disabled for now
  62     # The schema used here needs to aggregate the PL and VINI schemas
  63     # schema = "/var/www/html/schemas/pl.rng"
  64     schema = None
  65     if schema:
  66         try:
  67             tree = etree.parse(StringIO(rspec))
  68         except etree.XMLSyntaxError:
  69             message = str(sys.exc_info()[1])
  70             raise InvalidRSpec(message)
  71
  72         relaxng_doc = etree.parse(schema)
  73         relaxng = etree.RelaxNG(relaxng_doc)
  74
  75         if not relaxng(tree):
  76             error = relaxng.error_log.last_error
  77             message = "%s (line %s)" % (error.message, error.line)
  78             raise InvalidRSpec(message)
  79
  80     # get the callers hrn
  81     valid_cred = api.auth.checkCredentials(creds, 'createsliver', hrn)[0]
  82     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
  83
  84     # attempt to use delegated credential first
  85     credential = api.getDelegatedCredential(creds)
  86     if not credential:
  87         credential = api.getCredential()
  88     threads = ThreadManager()
  89     for aggregate in api.aggregates:
  90         # prevent infinite loop. Dont send request back to caller
  91         # unless the caller is the aggregate's SM
  92         if caller_hrn == aggregate and aggregate != api.hrn:
  93             continue
  94
  95         # Just send entire RSpec to each aggregate
  96         server = api.aggregates[aggregate]
  97         threads.run(server.CreateSliver, xrn, credential, rspec, users, call_id)
  98
  99     results = threads.get_results()
 100     rspec = SfaRSpec()
 101     for result in results:
 102         rspec.merge(result)
 103     return rspec
 104
 105 def RenewSliver(api, xrn, creds, expiration_time, call_id):
 106     if Callids().already_handled(call_id): return True
 107
 108     (hrn, type) = urn_to_hrn(xrn)
 109     # get the callers hrn
 110     valid_cred = api.auth.checkCredentials(creds, 'renewsliver', hrn)[0]
 111     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 112
 113     # attempt to use delegated credential first
 114     credential = api.getDelegatedCredential(creds)
 115     if not credential:
 116         credential = api.getCredential()
 117     threads = ThreadManager()
 118     for aggregate in api.aggregates:
 119         # prevent infinite loop. Dont send request back to caller
 120         # unless the caller is the aggregate's SM
 121         if caller_hrn == aggregate and aggregate != api.hrn:
 122             continue
 123
 124         server = api.aggregates[aggregate]
 125         threads.run(server.RenewSliver, xrn, [credential], expiration_time, call_id)
 126     # 'and' the results
 127     return reduce (lambda x,y: x and y, threads.get_results() , True)
 128
 129 def get_ticket(api, xrn, creds, rspec, users):
 130     slice_hrn, type = urn_to_hrn(xrn)
 131     # get the netspecs contained within the clients rspec
 132     aggregate_rspecs = {}
 133     tree= etree.parse(StringIO(rspec))
 134     elements = tree.findall('./network')
 135     for element in elements:
 136         aggregate_hrn = element.values()[0]
 137         aggregate_rspecs[aggregate_hrn] = rspec
 138
 139     # get the callers hrn
 140     valid_cred = api.auth.checkCredentials(creds, 'getticket', slice_hrn)[0]
 141     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 142
 143     # attempt to use delegated credential first
 144     credential = api.getDelegatedCredential(creds)
 145     if not credential:
 146         credential = api.getCredential()
 147     threads = ThreadManager()
 148     for (aggregate, aggregate_rspec) in aggregate_rspecs.iteritems():
 149         # prevent infinite loop. Dont send request back to caller
 150         # unless the caller is the aggregate's SM
 151         if caller_hrn == aggregate and aggregate != api.hrn:
 152             continue
 153         server = None
 154         if aggregate in api.aggregates:
 155             server = api.aggregates[aggregate]
 156         else:
 157             net_urn = hrn_to_urn(aggregate, 'authority')
 158             # we may have a peer that knows about this aggregate
 159             for agg in api.aggregates:
 160                 target_aggs = api.aggregates[agg].get_aggregates(credential, net_urn)
 161                 if not target_aggs or not 'hrn' in target_aggs[0]:
 162                     continue
 163                 # send the request to this address
 164                 url = target_aggs[0]['url']
 165                 server = xmlrpcprotocol.get_server(url, api.key_file, api.cert_file)
 166                 # aggregate found, no need to keep looping
 167                 break
 168         if server is None:
 169             continue
 170         threads.run(server.GetTicket, xrn, credential, aggregate_rspec, users)
 171
 172     results = threads.get_results()
 173
 174     # gather information from each ticket
 175     rspecs = []
 176     initscripts = []
 177     slivers = []
 178     object_gid = None
 179     for result in results:
 180         agg_ticket = SfaTicket(string=result)
 181         attrs = agg_ticket.get_attributes()
 182         if not object_gid:
 183             object_gid = agg_ticket.get_gid_object()
 184         rspecs.append(agg_ticket.get_rspec())
 185         initscripts.extend(attrs.get('initscripts', []))
 186         slivers.extend(attrs.get('slivers', []))
 187
 188     # merge info
 189     attributes = {'initscripts': initscripts,
 190                  'slivers': slivers}
 191     merged_rspec = merge_rspecs(rspecs)
 192
 193     # create a new ticket
 194     ticket = SfaTicket(subject = slice_hrn)
 195     ticket.set_gid_caller(api.auth.client_gid)
 196     ticket.set_issuer(key=api.key, subject=api.hrn)
 197     ticket.set_gid_object(object_gid)
 198     ticket.set_pubkey(object_gid.get_pubkey())
 199     #new_ticket.set_parent(api.auth.hierarchy.get_auth_ticket(auth_hrn))
 200     ticket.set_attributes(attributes)
 201     ticket.set_rspec(merged_rspec)
 202     ticket.encode()
 203     ticket.sign()
 204     return ticket.save_to_string(save_parents=True)
 205
 206
 207 def DeleteSliver(api, xrn, creds, call_id):
 208     if Callids().already_handled(call_id): return ""
 209     (hrn, type) = urn_to_hrn(xrn)
 210     # get the callers hrn
 211     valid_cred = api.auth.checkCredentials(creds, 'deletesliver', hrn)[0]
 212     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 213
 214     # attempt to use delegated credential first
 215     credential = api.getDelegatedCredential(creds)
 216     if not credential:
 217         credential = api.getCredential()
 218     threads = ThreadManager()
 219     for aggregate in api.aggregates:
 220         # prevent infinite loop. Dont send request back to caller
 221         # unless the caller is the aggregate's SM
 222         if caller_hrn == aggregate and aggregate != api.hrn:
 223             continue
 224         server = api.aggregates[aggregate]
 225         threads.run(server.DeleteSliver, xrn, credential, call_id)
 226     threads.get_results()
 227     return 1
 228
 229 def start_slice(api, xrn, creds):
 230     hrn, type = urn_to_hrn(xrn)
 231
 232     # get the callers hrn
 233     valid_cred = api.auth.checkCredentials(creds, 'startslice', hrn)[0]
 234     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 235
 236     # attempt to use delegated credential first
 237     credential = api.getDelegatedCredential(creds)
 238     if not credential:
 239         credential = api.getCredential()
 240     threads = ThreadManager()
 241     for aggregate in api.aggregates:
 242         # prevent infinite loop. Dont send request back to caller
 243         # unless the caller is the aggregate's SM
 244         if caller_hrn == aggregate and aggregate != api.hrn:
 245             continue
 246         server = api.aggregates[aggregate]
 247         threads.run(server.Start, xrn, credential)
 248     threads.get_results()
 249     return 1
 250
 251 def stop_slice(api, xrn, creds):
 252     hrn, type = urn_to_hrn(xrn)
 253
 254     # get the callers hrn
 255     valid_cred = api.auth.checkCredentials(creds, 'stopslice', hrn)[0]
 256     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 257
 258     # attempt to use delegated credential first
 259     credential = api.getDelegatedCredential(creds)
 260     if not credential:
 261         credential = api.getCredential()
 262     threads = ThreadManager()
 263     for aggregate in api.aggregates:
 264         # prevent infinite loop. Dont send request back to caller
 265         # unless the caller is the aggregate's SM
 266         if caller_hrn == aggregate and aggregate != api.hrn:
 267             continue
 268         server = api.aggregates[aggregate]
 269         threads.run(server.Stop, xrn, credential)
 270     threads.get_results()
 271     return 1
 272
 273 def reset_slice(api, xrn):
 274     """
 275     Not implemented
 276     """
 277     return 1
 278
 279 def shutdown(api, xrn, creds):
 280     """
 281     Not implemented
 282     """
 283     return 1
 284
 285 def status(api, xrn, creds):
 286     """
 287     Not implemented
 288     """
 289     return 1
 290
 291 # Thierry : caching at the slicemgr level makes sense to some extent
 292 caching=True
 293 #caching=False
 294 def ListSlices(api, creds, call_id):
 295
 296     if Callids().already_handled(call_id): return []
 297
 298     # look in cache first
 299     if caching and api.cache:
 300         slices = api.cache.get('slices')
 301         if slices:
 302             return slices
 303
 304     # get the callers hrn
 305     valid_cred = api.auth.checkCredentials(creds, 'listslices', None)[0]
 306     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 307
 308     # attempt to use delegated credential first
 309     credential = api.getDelegatedCredential(creds)
 310     if not credential:
 311         credential = api.getCredential()
 312     threads = ThreadManager()
 313     # fetch from aggregates
 314     for aggregate in api.aggregates:
 315         # prevent infinite loop. Dont send request back to caller
 316         # unless the caller is the aggregate's SM
 317         if caller_hrn == aggregate and aggregate != api.hrn:
 318             continue
 319         server = api.aggregates[aggregate]
 320         threads.run(server.ListSlices, credential, call_id)
 321
 322     # combime results
 323     results = threads.get_results()
 324     slices = []
 325     for result in results:
 326         slices.extend(result)
 327
 328     # cache the result
 329     if caching and api.cache:
 330         api.cache.add('slices', slices)
 331
 332     return slices
 333
 334
 335 def ListResources(api, creds, options, call_id):
 336
 337     if Callids().already_handled(call_id): return ""
 338
 339     # get slice's hrn from options
 340     xrn = options.get('geni_slice_urn', '')
 341     (hrn, type) = urn_to_hrn(xrn)
 342
 343     # get the rspec's return format from options
 344     rspec_version = RSpecVersion(options.get('rspec_version', 'SFA 1'))
 345     version_string = "rspec_%s_%s" % (rspec_version.format, rspec_version.version)
 346
 347     # get hrn of the original caller
 348     origin_hrn = options.get('origin_hrn', None)
 349     if not origin_hrn:
 350         if isinstance(creds, list):
 351             origin_hrn = Credential(string=creds[0]).get_gid_caller().get_hrn()
 352         else:
 353             origin_hrn = Credential(string=creds).get_gid_caller().get_hrn()
 354
 355     # look in cache first
 356     if caching and api.cache and not xrn:
 357         rspec =  api.cache.get(version_string)
 358         if rspec:
 359             return rspec
 360
 361     # get the callers hrn
 362     valid_cred = api.auth.checkCredentials(creds, 'listnodes', hrn)[0]
 363     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 364
 365     # attempt to use delegated credential first
 366     credential = api.getDelegatedCredential(creds)
 367     if not credential:
 368         credential = api.getCredential()
 369     threads = ThreadManager()
 370     for aggregate in api.aggregates:
 371         # prevent infinite loop. Dont send request back to caller
 372         # unless the caller is the aggregate's SM
 373         if caller_hrn == aggregate and aggregate != api.hrn:
 374             continue
 375         # get the rspec from the aggregate
 376         server = api.aggregates[aggregate]
 377         my_opts = copy(options)
 378         my_opts['geni_compressed'] = False
 379         threads.run(server.ListResources, credential, my_opts, call_id)
 380         #threads.run(server.get_resources, cred, xrn, origin_hrn)
 381
 382     results = threads.get_results()
 383     rspec = SfaRSpec()
 384     for result in results:
 385         rspec.merge(result)
 386
 387     # cache the result
 388     if caching and api.cache and not xrn:
 389         api.cache.add(version_string, rspec)
 390
 391     return rspec.toxml()
 392
 393 # first draft at a merging SliverStatus
 394 def SliverStatus(api, slice_xrn, creds, call_id):
 395     if Callids().already_handled(call_id): return {}
 396     # attempt to use delegated credential first
 397     credential = api.getDelegatedCredential(creds)
 398     if not credential:
 399         credential = api.getCredential()
 400     threads = ThreadManager()
 401     for aggregate in api.aggregates:
 402         server = api.aggregates[aggregate]
 403         threads.run (server.SliverStatus, slice_xrn, credential, call_id)
 404     results = threads.get_results()
 405
 406     # get rid of any void result - e.g. when call_id was hit where by convention we return {}
 407     results = [ result for result in results if result and result['geni_resources']]
 408
 409     # do not try to combine if there's no result
 410     if not results : return {}
 411
 412     # otherwise let's merge stuff
 413     overall = {}
 414
 415     # mmh, it is expected that all results carry the same urn
 416     overall['geni_urn'] = results[0]['geni_urn']
 417
 418     # consolidate geni_status - simple model using max on a total order
 419     states = [ 'ready', 'configuring', 'failed', 'unknown' ]
 420     # hash name to index
 421     shash = dict ( zip ( states, range(len(states)) ) )
 422     def combine_status (x,y):
 423         return shash [ max (shash(x),shash(y)) ]
 424     overall['geni_status'] = reduce (combine_status, [ result['geni_status'] for result in results], 'ready' )
 425
 426     # {'ready':0,'configuring':1,'failed':2,'unknown':3}
 427     # append all geni_resources
 428     overall['geni_resources'] = \
 429         reduce (lambda x,y: x+y, [ result['geni_resources'] for result in results] , [])
 430
 431     return overall
 432
 433 def main():
 434     r = RSpec()
 435     r.parseFile(sys.argv[1])
 436     rspec = r.toDict()
 437     CreateSliver(None,'plc.princeton.tmacktestslice',rspec,'create-slice-tmacktestslice')
 438
 439 if __name__ == "__main__":
 440     main()
 441