sfa/importer/nitosimporter.py

   1
   2 import os
   3
   4 from sfa.util.config import Config
   5 from sfa.util.xrn import Xrn, get_leaf, get_authority, hrn_to_urn
   6
   7 from sfa.trust.gid import create_uuid
   8 from sfa.trust.certificate import convert_public_key, Keypair
   9
  10 # using global alchemy.session() here is fine
  11 # as importer is on standalone one-shot process
  12 from sfa.storage.alchemy import global_dbsession
  13 from sfa.storage.model import RegRecord, RegAuthority, RegSlice, RegNode, RegUser, RegKey
  14
  15 from sfa.nitos.nitosshell import NitosShell
  16 from sfa.nitos.nitosxrn import hostname_to_hrn, slicename_to_hrn, email_to_hrn, hrn_to_nitos_slicename, username_to_hrn
  17
  18 def _get_site_hrn(interface_hrn, site):
  19     hrn = ".".join([interface_hrn, site['name']])
  20     return hrn
  21
  22
  23 class NitosImporter:
  24
  25     def __init__ (self, auth_hierarchy, logger):
  26         self.auth_hierarchy = auth_hierarchy
  27         self.logger=logger
  28
  29     def add_options (self, parser):
  30         # we don't have any options for now
  31         pass
  32
  33     # hrn hash is initialized from current db
  34     # remember just-created records as we go
  35     # xxx might make sense to add a UNIQUE constraint in the db itself
  36     def remember_record_by_hrn (self, record):
  37         tuple = (record.type, record.hrn)
  38         if tuple in self.records_by_type_hrn:
  39             self.logger.warning ("NitosImporter.remember_record_by_hrn: duplicate (%s,%s)"%tuple)
  40             return
  41         self.records_by_type_hrn [ tuple ] = record
  42
  43     # ditto for pointer hash
  44     def remember_record_by_pointer (self, record):
  45         if record.pointer == -1:
  46             self.logger.warning ("NitosImporter.remember_record_by_pointer: pointer is void")
  47             return
  48         tuple = (record.type, record.pointer)
  49         if tuple in self.records_by_type_pointer:
  50             self.logger.warning ("NitosImporter.remember_record_by_pointer: duplicate (%s,%s)"%tuple)
  51             return
  52         self.records_by_type_pointer [ ( record.type, record.pointer,) ] = record
  53
  54     def remember_record (self, record):
  55         self.remember_record_by_hrn (record)
  56         self.remember_record_by_pointer (record)
  57
  58     def locate_by_type_hrn (self, type, hrn):
  59         return self.records_by_type_hrn.get ( (type, hrn), None)
  60
  61     def locate_by_type_pointer (self, type, pointer):
  62         return self.records_by_type_pointer.get ( (type, pointer), None)
  63
  64     # a convenience/helper function to see if a record is already known
  65     # a former, broken, attempt (in 2.1-9) had been made
  66     # to try and use 'pointer' as a first, most significant attempt
  67     # the idea being to preserve stuff as much as possible, and thus
  68     # to avoid creating a new gid in the case of a simple hrn rename
  69     # however this of course doesn't work as the gid depends on the hrn...
  70     #def locate (self, type, hrn=None, pointer=-1):
  71     #    if pointer!=-1:
  72     #        attempt = self.locate_by_type_pointer (type, pointer)
  73     #        if attempt : return attempt
  74     #    if hrn is not None:
  75     #        attempt = self.locate_by_type_hrn (type, hrn,)
  76     #        if attempt : return attempt
  77     #    return None
  78
  79     # this makes the run method a bit abtruse - out of the way
  80
  81     def run (self, options):
  82         config = Config ()
  83         interface_hrn = config.SFA_INTERFACE_HRN
  84         root_auth = config.SFA_REGISTRY_ROOT_AUTH
  85         shell = NitosShell (config)
  86
  87         ######## retrieve all existing SFA objects
  88         all_records = global_dbsession.query(RegRecord).all()
  89
  90         # create hash by (type,hrn)
  91         # we essentially use this to know if a given record is already known to SFA
  92         self.records_by_type_hrn = \
  93             dict ( [ ( (record.type, record.hrn) , record ) for record in all_records ] )
  94         # create hash by (type,pointer)
  95         self.records_by_type_pointer = \
  96             dict ( [ ( (record.type, record.pointer) , record ) for record in all_records
  97                      if record.pointer != -1] )
  98
  99         # initialize record.stale to True by default, then mark stale=False on the ones that are in use
 100         for record in all_records: record.stale=True
 101
 102         ######## retrieve NITOS data
 103         # Get site info
 104         # retrieve only required stuf
 105         site = shell.getTestbedInfo()
 106         sites = [site]
 107         # create a hash of sites by login_base
 108 #       # sites_by_login_base = dict ( [ ( site['login_base'], site ) for site in sites ] )
 109         # Get all NITOS users
 110         users = shell.getUsers()
 111         # create a hash of users by user_id
 112         users_by_id = dict ( [ ( user['user_id'], user) for user in users ] )
 113         # Get all NITOS public keys
 114         # accumulate key ids for keys retrieval
 115 #        key_ids = []
 116 #        for person in persons:
 117 #            key_ids.extend(person['key_ids'])
 118 #        keys = shell.GetKeys( {'peer_id': None, 'key_id': key_ids,
 119 #                               'key_type': 'ssh'} )
 120 #        # create a hash of keys by key_id
 121 #        keys_by_id = dict ( [ ( key['key_id'], key ) for key in keys ] )
 122         # create a dict user_id -> [ (nitos)keys ]
 123         keys_by_user_id = dict ( [ ( user['user_id'], user['keys']) for user in users ] )
 124         # Get all nitos nodes
 125         nodes = shell.getNodes({}, [])
 126         # create hash by node_id
 127         nodes_by_id = dict ( [ (node['node_id'], node) for node in nodes ] )
 128         # Get all nitos slices
 129         slices = shell.getSlices({}, [])
 130         # create hash by slice_id
 131         slices_by_id = dict ( [ (slice['slice_id'], slice) for slice in slices ] )
 132
 133
 134         # start importing
 135         for site in sites:
 136         #for i in [0]:
 137             site_hrn = _get_site_hrn(interface_hrn, site)
 138             # import if hrn is not in list of existing hrns or if the hrn exists
 139             # but its not a site record
 140             site_record=self.locate_by_type_hrn ('authority', site_hrn)
 141             if not site_record:
 142                 try:
 143                     urn = hrn_to_urn(site_hrn, 'authority')
 144                     if not self.auth_hierarchy.auth_exists(urn):
 145                         self.auth_hierarchy.create_auth(urn)
 146                     auth_info = self.auth_hierarchy.get_auth_info(urn)
 147                     site_record = RegAuthority(hrn=site_hrn, gid=auth_info.get_gid_object(),
 148                                                pointer=0,
 149                                                authority=get_authority(site_hrn))
 150                     site_record.just_created()
 151                     global_dbsession.add(site_record)
 152                     global_dbsession.commit()
 153                     self.logger.info("NitosImporter: imported authority (site) : %s" % site_record)
 154                     self.remember_record (site_record)
 155                 except:
 156                     # if the site import fails then there is no point in trying to import the
 157                     # site's child records (node, slices, persons), so skip them.
 158                     self.logger.log_exc("NitosImporter: failed to import site. Skipping child records")
 159                     continue
 160             else:
 161                 # xxx update the record ...
 162                 pass
 163             site_record.stale=False
 164
 165             # import node records
 166             for node in nodes:
 167                 site_auth = get_authority(site_hrn)
 168                 site_name = site['name']
 169                 node_hrn =  hostname_to_hrn(site_auth, site_name, node['hostname'])
 170                 # xxx this sounds suspicious
 171                 if len(node_hrn) > 64: node_hrn = node_hrn[:64]
 172                 node_record = self.locate_by_type_hrn ( 'node', node_hrn )
 173                 if not node_record:
 174                     try:
 175                         pkey = Keypair(create=True)
 176                         urn = hrn_to_urn(node_hrn, 'node')
 177                         node_gid = self.auth_hierarchy.create_gid(urn, create_uuid(), pkey)
 178                         node_record = RegNode (hrn=node_hrn, gid=node_gid,
 179                                                pointer =node['node_id'],
 180                                                authority=get_authority(node_hrn))
 181                         node_record.just_created()
 182                         global_dbsession.add(node_record)
 183                         global_dbsession.commit()
 184                         self.logger.info("NitosImporter: imported node: %s" % node_record)
 185                         self.remember_record (node_record)
 186                     except:
 187                            self.logger.log_exc("NitosImporter: failed to import node")
 188                 else:
 189                     # xxx update the record ...
 190                     pass
 191
 192                 node_record.stale=False
 193
 194
 195             # import users
 196             for user in users:
 197                 user_hrn = username_to_hrn(interface_hrn, site['name'], user['username'])
 198                 # xxx suspicious again
 199                 if len(user_hrn) > 64: user_hrn = user_hrn[:64]
 200                 user_urn = hrn_to_urn(user_hrn, 'user')
 201
 202                 user_record = self.locate_by_type_hrn ( 'user', user_hrn)
 203
 204                 # return a tuple pubkey (a nitos key object) and pkey (a Keypair object)
 205                 def init_user_key (user):
 206                     pubkey = None
 207                     pkey = None
 208                     if  user['keys']:
 209                         # randomly pick first key in set
 210                         for key in user['keys']:
 211                              pubkey = key
 212                              try:
 213                                 pkey = convert_public_key(pubkey)
 214                                 break
 215                              except:
 216                                 continue
 217                         if not pkey:
 218                             self.logger.warn('NitosImporter: unable to convert public key for %s' % user_hrn)
 219                             pkey = Keypair(create=True)
 220                     else:
 221                         # the user has no keys. Creating a random keypair for the user's gid
 222                         self.logger.warn("NitosImporter: user %s does not have a NITOS public key"%user_hrn)
 223                         pkey = Keypair(create=True)
 224                     return (pubkey, pkey)
 225
 226                 # new user
 227                 try:
 228                     if not user_record:
 229                         (pubkey,pkey) = init_user_key (user)
 230                         user_gid = self.auth_hierarchy.create_gid(user_urn, create_uuid(), pkey)
 231                         user_gid.set_email(user['email'])
 232                         user_record = RegUser (hrn=user_hrn, gid=user_gid,
 233                                                  pointer=user['user_id'],
 234                                                  authority=get_authority(user_hrn),
 235                                                  email=user['email'])
 236                         if pubkey:
 237                             user_record.reg_keys=[RegKey (pubkey)]
 238                         else:
 239                             self.logger.warning("No key found for user %s"%user_record)
 240                         user_record.just_created()
 241                         global_dbsession.add (user_record)
 242                         global_dbsession.commit()
 243                         self.logger.info("NitosImporter: imported user: %s" % user_record)
 244                         self.remember_record ( user_record )
 245                     else:
 246                         # update the record ?
 247                         # if user's primary key has changed then we need to update the
 248                         # users gid by forcing an update here
 249                         sfa_keys = user_record.reg_keys
 250
 251                         def sfa_key_in_list (sfa_key,nitos_user_keys):
 252                             for nitos_key in nitos_user_keys:
 253                                 if nitos_key==sfa_key: return True
 254                             return False
 255                         # are all the SFA keys known to nitos ?
 256                         new_keys=False
 257                         if not sfa_keys and user['keys']:
 258                             new_keys = True
 259                         else:
 260                             for sfa_key in sfa_keys:
 261                                  if not sfa_key_in_list (sfa_key.key,user['keys']):
 262                                      new_keys = True
 263
 264                         if new_keys:
 265                             (pubkey,pkey) = init_user_key (user)
 266                             user_gid = self.auth_hierarchy.create_gid(user_urn, create_uuid(), pkey)
 267                             if not pubkey:
 268                                 user_record.reg_keys=[]
 269                             else:
 270                                 user_record.reg_keys=[ RegKey (pubkey)]
 271                             user_record.gid = user_gid
 272                             user_record.just_updated()
 273                             self.logger.info("NitosImporter: updated user: %s" % user_record)
 274                     user_record.email = user['email']
 275                     global_dbsession.commit()
 276                     user_record.stale=False
 277                 except:
 278                     self.logger.log_exc("NitosImporter: failed to import user %s %s"%(user['user_id'],user['email']))
 279
 280
 281             # import slices
 282             for slice in slices:
 283                 slice_hrn = slicename_to_hrn(interface_hrn, site['name'], slice['slice_name'])
 284                 slice_record = self.locate_by_type_hrn ('slice', slice_hrn)
 285                 if not slice_record:
 286                     try:
 287                         pkey = Keypair(create=True)
 288                         urn = hrn_to_urn(slice_hrn, 'slice')
 289                         slice_gid = self.auth_hierarchy.create_gid(urn, create_uuid(), pkey)
 290                         slice_record = RegSlice (hrn=slice_hrn, gid=slice_gid,
 291                                                  pointer=slice['slice_id'],
 292                                                  authority=get_authority(slice_hrn))
 293                         slice_record.just_created()
 294                         global_dbsession.add(slice_record)
 295                         global_dbsession.commit()
 296                         self.logger.info("NitosImporter: imported slice: %s" % slice_record)
 297                         self.remember_record ( slice_record )
 298                     except:
 299                         self.logger.log_exc("NitosImporter: failed to import slice")
 300                 else:
 301                     # xxx update the record ...
 302                     self.logger.warning ("Slice update not yet implemented")
 303                     pass
 304                 # record current users affiliated with the slice
 305                 slice_record.reg_researchers = \
 306                       [ self.locate_by_type_pointer ('user',int(user_id)) for user_id in slice['user_ids'] ]
 307                 global_dbsession.commit()
 308                 slice_record.stale=False
 309
 310
 311         ### remove stale records
 312         # special records must be preserved
 313         system_hrns = [interface_hrn, root_auth, interface_hrn + '.slicemanager']
 314         for record in all_records:
 315             if record.hrn in system_hrns:
 316                 record.stale=False
 317             if record.peer_authority:
 318                 record.stale=False
 319
 320         for record in all_records:
 321             try:        stale=record.stale
 322             except:
 323                 stale=True
 324                 self.logger.warning("stale not found with %s"%record)
 325             if stale:
 326                 self.logger.info("NitosImporter: deleting stale record: %s" % record)
 327                 global_dbsession.delete(record)
 328                 global_dbsession.commit()
 329
 330