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 # XX FIX ME:  should merge result from multiple aggregates instead of
  29 # calling aggregate implementation
  30 from sfa.managers.aggregate_manager_pl import slice_status
  31
  32 # we have specialized xmlrpclib.ServerProxy to remember the input url
  33 # OTOH it's not clear if we're only dealing with XMLRPCServerProxy instances
  34 def get_serverproxy_url (server):
  35     try:
  36         return server.url
  37     except:
  38         sfa_logger().warning("GetVersion, falling back to xmlrpclib.ServerProxy internals")
  39         return server._ServerProxy__host + server._ServerProxy__handler
  40
  41 def GetVersion(api):
  42     # peers explicitly in aggregates.xml
  43     peers =dict ([ (peername,get_serverproxy_url(v)) for (peername,v) in api.aggregates.iteritems()
  44                    if peername != api.hrn])
  45     xrn=Xrn (api.hrn)
  46     sm_version=version_core({'interface':'slicemgr',
  47                              'hrn' : xrn.get_hrn(),
  48                              'urn' : xrn.get_urn(),
  49                              'peers': peers,
  50                              })
  51     # local aggregate if present needs to have localhost resolved
  52     if api.hrn in api.aggregates:
  53         local_am_url=get_serverproxy_url(api.aggregates[api.hrn])
  54         sm_version['peers'][api.hrn]=local_am_url.replace('localhost',sm_version['hostname'])
  55     return sm_version
  56
  57 def create_slice(api, xrn, creds, rspec, users):
  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)
  97
  98     results = threads.get_results()
  99     merged_rspec = merge_rspecs(results)
 100     return merged_rspec
 101
 102 def renew_slice(api, xrn, creds, expiration_time):
 103     hrn, type = urn_to_hrn(xrn)
 104
 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)
 122     threads.get_results()
 123     return 1
 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 delete_slice(api, xrn, creds):
 204     hrn, type = urn_to_hrn(xrn)
 205
 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)
 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 def get_slices(api, creds):
 288
 289     # look in cache first
 290     if api.cache:
 291         slices = api.cache.get('slices')
 292         if slices:
 293             return slices
 294
 295     # get the callers hrn
 296     valid_cred = api.auth.checkCredentials(creds, 'listslices', None)[0]
 297     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 298
 299     # attempt to use delegated credential first
 300     credential = api.getDelegatedCredential(creds)
 301     if not credential:
 302         credential = api.getCredential()
 303     threads = ThreadManager()
 304     # fetch from aggregates
 305     for aggregate in api.aggregates:
 306         # prevent infinite loop. Dont send request back to caller
 307         # unless the caller is the aggregate's SM
 308         if caller_hrn == aggregate and aggregate != api.hrn:
 309             continue
 310         server = api.aggregates[aggregate]
 311         threads.run(server.ListSlices, credential)
 312
 313     # combime results
 314     results = threads.get_results()
 315     slices = []
 316     for result in results:
 317         slices.extend(result)
 318
 319     # cache the result
 320     if api.cache:
 321         api.cache.add('slices', slices)
 322
 323     return slices
 324
 325
 326 # Thierry : caching at the slicemgr level makes sense to some extent
 327 caching=True
 328 def get_rspec(api, creds, options, call_id):
 329
 330     if not Callids().should_handle_call_id(call_id):
 331         api.logger.info("%d received get_rspec with known call_id %s"%(api.interface,call_id))
 332         return ""
 333
 334     # get slice's hrn from options
 335     xrn = options.get('geni_slice_urn', '')
 336     (hrn, type) = urn_to_hrn(xrn)
 337
 338     # get hrn of the original caller
 339     origin_hrn = options.get('origin_hrn', None)
 340     if not origin_hrn:
 341         if isinstance(creds, list):
 342             origin_hrn = Credential(string=creds[0]).get_gid_caller().get_hrn()
 343         else:
 344             origin_hrn = Credential(string=creds).get_gid_caller().get_hrn()
 345
 346     # look in cache first
 347     if caching and api.cache and not xrn:
 348         rspec =  api.cache.get('nodes')
 349         if rspec:
 350             return rspec
 351
 352     # get the callers hrn
 353     valid_cred = api.auth.checkCredentials(creds, 'listnodes', hrn)[0]
 354     caller_hrn = Credential(string=valid_cred).get_gid_caller().get_hrn()
 355
 356     # attempt to use delegated credential first
 357     credential = api.getDelegatedCredential(creds)
 358     if not credential:
 359         credential = api.getCredential()
 360     threads = ThreadManager()
 361     for aggregate in api.aggregates:
 362         # prevent infinite loop. Dont send request back to caller
 363         # unless the caller is the aggregate's SM
 364         if caller_hrn == aggregate and aggregate != api.hrn:
 365             continue
 366         # get the rspec from the aggregate
 367         server = api.aggregates[aggregate]
 368         my_opts = copy(options)
 369         my_opts['geni_compressed'] = False
 370         threads.run(server.ListResources, credential, my_opts, call_id)
 371         #threads.run(server.get_resources, cred, xrn, origin_hrn)
 372
 373     results = threads.get_results()
 374     merged_rspec = merge_rspecs(results)
 375
 376     # cache the result
 377     if caching and api.cache and not xrn:
 378         api.cache.add('nodes', merged_rspec)
 379
 380     return merged_rspec
 381
 382 def main():
 383     r = RSpec()
 384     r.parseFile(sys.argv[1])
 385     rspec = r.toDict()
 386     create_slice(None,'plc.princeton.tmacktestslice',rspec)
 387
 388 if __name__ == "__main__":
 389     main()
 390