sfa/methods/create_slice.py

   1 ### $Id$
   2 ### $URL$
   3
   4 from sfa.util.faults import *
   5 from sfa.util.misc import *
   6 from sfa.util.method import Method
   7 from sfa.util.parameter import Parameter, Mixed
   8 from sfa.trust.auth import Auth
   9 from sfa.plc.slices import Slices
  10 from sfa.util.config import Config
  11 # RSpecManager_pl is not used. It's used to make sure the module is in place.
  12 import sfa.rspecs.aggregates.rspec_manager_pl
  13 from sfa.trust.credential import Credential
  14 from sfatables.runtime import SFATablesRules
  15
  16
  17 class create_slice(Method):
  18     """
  19     Instantiate the specified slice according to whats defined in the specified rspec
  20
  21     @param cred credential string specifying the rights of the caller
  22     @param hrn human readable name of slice to instantiate
  23     @param rspec resource specification
  24     @return 1 is successful, faults otherwise
  25     """
  26
  27     interfaces = ['aggregate', 'slicemgr']
  28
  29     accepts = [
  30         Parameter(str, "Credential string"),
  31         Parameter(str, "Human readable name of slice to instantiate"),
  32         Parameter(str, "Resource specification"),
  33         Mixed(Parameter(str, "Request hash"),
  34               Parameter(None, "Request hash not specified"))
  35         ]
  36
  37     returns = Parameter(int, "1 if successful")
  38
  39     def call(self, cred, hrn, requested_rspec, request_hash=None):
  40
  41         # This cred will be an slice cred, not a user, so we cant use it to
  42         # authenticate the caller's request_hash. Let just get the caller's gid
  43         # from the cred and authenticate using that
  44         user_cred = Credential(string=cred)
  45         client_gid = user_cred.get_gid_caller()
  46         client_gid_str = client_gid.save_to_string(save_parents=True)
  47         self.api.auth.authenticateGid(client_gid_str, [cred, hrn, requested_rspec], request_hash)
  48         self.api.auth.check(cred, 'createslice')
  49
  50         #log the call
  51         gid_origin_caller = user_cred.get_gid_origin_caller()
  52         origin_hrn = gid_origin_caller.get_hrn()
  53         self.api.logger.info("interface: %s\tcaller-hrn: %s\ttarget-hrn: %s\tmethod-name: %s"%(self.api.interface, origin_hrn, hrn, self.name))
  54
  55         sfa_aggregate_type = Config().get_aggregate_rspec_type()
  56         rspec_manager = __import__("sfa.rspecs.aggregates.rspec_manager_"+sfa_aggregate_type, fromlist = ["sfa.rspecs.aggregates"])
  57         #Filter the incoming rspec using sfatables
  58         if self.api.interface in ['slicemgr']:
  59             incoming_rules = SFATablesRules('FORWARD-INCOMING')
  60         elif self.api.interface in ['aggregate']:
  61             incoming_rules = SFATablesRules('INCOMING')
  62
  63         if incoming_rules.sorted_rule_list:
  64             #incoming_rules.set_slice(hrn) # This is a temporary kludge. Eventually, we'd like to fetch the context requested by the match/target
  65
  66             contexts = incoming_rules.contexts
  67             request_context = rspec_manager.fetch_context(hrn, origin_hrn, contexts)
  68             incoming_rules.set_context(request_context)
  69             rspec = incoming_rules.apply(requested_rspec)
  70         else:
  71             rspec = requested_rspec
  72
  73         # send the call to the right manager
  74         if sfa_aggregate_type not in ['pl']:
  75             # To clean up after July 21 - SB
  76             rspec = rspec_manager.create_slice(self.api, hrn, rspec)
  77             return 1
  78
  79         manager_base = 'sfa.managers'
  80         if self.api.interface in ['aggregate']:
  81             mgr_type = self.api.config.SFA_AGGREGATE_TYPE
  82             manager_module = manager_base + ".aggregate_manager_%s" % mgr_type
  83             manager = __import__(manager_module, fromlist=[manager_base])
  84             manager.create_slice(self.api, hrn, rspec)
  85         elif self.api.interface in ['slicemgr']:
  86             mgr_type = self.api.config.SFA_SM_TYPE
  87             manager_module = manager_base + ".slice_manager_%s" % mgr_type
  88             manager = __import__(manager_module, fromlist=[manager_base])
  89             manager.create_slice(self.api, hrn, rspec, gid_origin_caller)
  90
  91         return 1