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
  19 def _get_site_hrn(interface_hrn, site):
  20     hrn = ".".join([interface_hrn, site['name']])
  21     return hrn
  22
  23
  24 class NitosImporter:
  25
  26     def __init__(self, auth_hierarchy, logger):
  27         self.auth_hierarchy = auth_hierarchy
  28         self.logger = logger
  29
  30     def add_options(self, parser):
  31         # we don't have any options for now
  32         pass
  33
  34     # hrn hash is initialized from current db
  35     # remember just-created records as we go
  36     # xxx might make sense to add a UNIQUE constraint in the db itself
  37     def remember_record_by_hrn(self, record):
  38         tuple = (record.type, record.hrn)
  39         if tuple in self.records_by_type_hrn:
  40             self.logger.warning(
  41                 "NitosImporter.remember_record_by_hrn: duplicate (%s,%s)" % tuple)
  42             return
  43         self.records_by_type_hrn[tuple] = record
  44
  45     # ditto for pointer hash
  46     def remember_record_by_pointer(self, record):
  47         if record.pointer == -1:
  48             self.logger.warning(
  49                 "NitosImporter.remember_record_by_pointer: pointer is void")
  50             return
  51         tuple = (record.type, record.pointer)
  52         if tuple in self.records_by_type_pointer:
  53             self.logger.warning(
  54                 "NitosImporter.remember_record_by_pointer: duplicate (%s,%s)" % tuple)
  55             return
  56         self.records_by_type_pointer[(record.type, record.pointer,)] = record
  57
  58     def remember_record(self, record):
  59         self.remember_record_by_hrn(record)
  60         self.remember_record_by_pointer(record)
  61
  62     def locate_by_type_hrn(self, type, hrn):
  63         return self.records_by_type_hrn.get((type, hrn), None)
  64
  65     def locate_by_type_pointer(self, type, pointer):
  66         return self.records_by_type_pointer.get((type, pointer), None)
  67
  68     # a convenience/helper function to see if a record is already known
  69     # a former, broken, attempt (in 2.1-9) had been made
  70     # to try and use 'pointer' as a first, most significant attempt
  71     # the idea being to preserve stuff as much as possible, and thus
  72     # to avoid creating a new gid in the case of a simple hrn rename
  73     # however this of course doesn't work as the gid depends on the hrn...
  74     # def locate (self, type, hrn=None, pointer=-1):
  75     #    if pointer!=-1:
  76     #        attempt = self.locate_by_type_pointer (type, pointer)
  77     #        if attempt : return attempt
  78     #    if hrn is not None:
  79     #        attempt = self.locate_by_type_hrn (type, hrn,)
  80     #        if attempt : return attempt
  81     #    return None
  82
  83     # this makes the run method a bit abtruse - out of the way
  84
  85     def run(self, options):
  86         config = Config()
  87         interface_hrn = config.SFA_INTERFACE_HRN
  88         root_auth = config.SFA_REGISTRY_ROOT_AUTH
  89         shell = NitosShell(config)
  90
  91         # retrieve all existing SFA objects
  92         all_records = global_dbsession.query(RegRecord).all()
  93
  94         # create hash by (type,hrn)
  95         # we essentially use this to know if a given record is already known to
  96         # SFA
  97         self.records_by_type_hrn = \
  98             dict([((record.type, record.hrn), record)
  99                   for record in all_records])
 100         # create hash by (type,pointer)
 101         self.records_by_type_pointer = \
 102             dict([((record.type, record.pointer), record) for record in all_records
 103                   if record.pointer != -1])
 104
 105         # initialize record.stale to True by default, then mark stale=False on
 106         # the ones that are in use
 107         for record in all_records:
 108             record.stale = True
 109
 110         # retrieve NITOS data
 111         # Get site info
 112         # retrieve only required stuf
 113         site = shell.getTestbedInfo()
 114         sites = [site]
 115         # create a hash of sites by login_base
 116 #       # sites_by_login_base = dict ( [ ( site['login_base'], site ) for site in sites ] )
 117         # Get all NITOS users
 118         users = shell.getUsers()
 119         # create a hash of users by user_id
 120         users_by_id = dict([(user['user_id'], user) for user in users])
 121         # Get all NITOS public keys
 122         # accumulate key ids for keys retrieval
 123 #        key_ids = []
 124 #        for person in persons:
 125 #            key_ids.extend(person['key_ids'])
 126 #        keys = shell.GetKeys( {'peer_id': None, 'key_id': key_ids,
 127 #                               'key_type': 'ssh'} )
 128 #        # create a hash of keys by key_id
 129 #        keys_by_id = dict ( [ ( key['key_id'], key ) for key in keys ] )
 130         # create a dict user_id -> [ (nitos)keys ]
 131         keys_by_user_id = dict(
 132             [(user['user_id'], user['keys']) for user in users])
 133         # Get all nitos nodes
 134         nodes = shell.getNodes({}, [])
 135         # create hash by node_id
 136         nodes_by_id = dict([(node['node_id'], node) for node in nodes])
 137         # Get all nitos slices
 138         slices = shell.getSlices({}, [])
 139         # create hash by slice_id
 140         slices_by_id = dict([(slice['slice_id'], slice) for slice in slices])
 141
 142         # start importing
 143         for site in sites:
 144             # for i in [0]:
 145             site_hrn = _get_site_hrn(interface_hrn, site)
 146             # import if hrn is not in list of existing hrns or if the hrn exists
 147             # but its not a site record
 148             site_record = self.locate_by_type_hrn('authority', site_hrn)
 149             if not site_record:
 150                 try:
 151                     urn = hrn_to_urn(site_hrn, 'authority')
 152                     if not self.auth_hierarchy.auth_exists(urn):
 153                         self.auth_hierarchy.create_auth(urn)
 154                     auth_info = self.auth_hierarchy.get_auth_info(urn)
 155                     site_record = RegAuthority(hrn=site_hrn, gid=auth_info.get_gid_object(),
 156                                                pointer=0,
 157                                                authority=get_authority(site_hrn))
 158                     site_record.just_created()
 159                     global_dbsession.add(site_record)
 160                     global_dbsession.commit()
 161                     self.logger.info(
 162                         "NitosImporter: imported authority (site) : %s" % site_record)
 163                     self.remember_record(site_record)
 164                 except:
 165                     # if the site import fails then there is no point in trying to import the
 166                     # site's child records (node, slices, persons), so skip
 167                     # them.
 168                     self.logger.log_exc(
 169                         "NitosImporter: failed to import site. Skipping child records")
 170                     continue
 171             else:
 172                 # xxx update the record ...
 173                 pass
 174             site_record.stale = False
 175
 176             # import node records
 177             for node in nodes:
 178                 site_auth = get_authority(site_hrn)
 179                 site_name = site['name']
 180                 node_hrn = hostname_to_hrn(
 181                     site_auth, site_name, node['hostname'])
 182                 # xxx this sounds suspicious
 183                 if len(node_hrn) > 64:
 184                     node_hrn = node_hrn[:64]
 185                 node_record = self.locate_by_type_hrn('node', node_hrn)
 186                 if not node_record:
 187                     try:
 188                         pkey = Keypair(create=True)
 189                         urn = hrn_to_urn(node_hrn, 'node')
 190                         node_gid = self.auth_hierarchy.create_gid(
 191                             urn, create_uuid(), pkey)
 192                         node_record = RegNode(hrn=node_hrn, gid=node_gid,
 193                                               pointer=node['node_id'],
 194                                               authority=get_authority(node_hrn))
 195                         node_record.just_created()
 196                         global_dbsession.add(node_record)
 197                         global_dbsession.commit()
 198                         self.logger.info(
 199                             "NitosImporter: imported node: %s" % node_record)
 200                         self.remember_record(node_record)
 201                     except:
 202                         self.logger.log_exc(
 203                             "NitosImporter: failed to import node")
 204                 else:
 205                     # xxx update the record ...
 206                     pass
 207
 208                 node_record.stale = False
 209
 210             # import users
 211             for user in users:
 212                 user_hrn = username_to_hrn(
 213                     interface_hrn, site['name'], user['username'])
 214                 # xxx suspicious again
 215                 if len(user_hrn) > 64:
 216                     user_hrn = user_hrn[:64]
 217                 user_urn = hrn_to_urn(user_hrn, 'user')
 218
 219                 user_record = self.locate_by_type_hrn('user', user_hrn)
 220
 221                 # return a tuple pubkey (a nitos key object) and pkey (a
 222                 # Keypair object)
 223                 def init_user_key(user):
 224                     pubkey = None
 225                     pkey = None
 226                     if user['keys']:
 227                         # randomly pick first key in set
 228                         for key in user['keys']:
 229                             pubkey = key
 230                             try:
 231                                 pkey = convert_public_key(pubkey)
 232                                 break
 233                             except:
 234                                 continue
 235                         if not pkey:
 236                             self.logger.warning(
 237                                 'NitosImporter: unable to convert public key for %s' % user_hrn)
 238                             pkey = Keypair(create=True)
 239                     else:
 240                         # the user has no keys. Creating a random keypair for
 241                         # the user's gid
 242                         self.logger.warning(
 243                             "NitosImporter: user %s does not have a NITOS public key" % user_hrn)
 244                         pkey = Keypair(create=True)
 245                     return (pubkey, pkey)
 246
 247                 # new user
 248                 try:
 249                     if not user_record:
 250                         (pubkey, pkey) = init_user_key(user)
 251                         user_gid = self.auth_hierarchy.create_gid(
 252                             user_urn, create_uuid(), pkey)
 253                         user_gid.set_email(user['email'])
 254                         user_record = RegUser(hrn=user_hrn, gid=user_gid,
 255                                               pointer=user['user_id'],
 256                                               authority=get_authority(
 257                                                   user_hrn),
 258                                               email=user['email'])
 259                         if pubkey:
 260                             user_record.reg_keys = [RegKey(pubkey)]
 261                         else:
 262                             self.logger.warning(
 263                                 "No key found for user %s" % user_record)
 264                         user_record.just_created()
 265                         global_dbsession.add(user_record)
 266                         global_dbsession.commit()
 267                         self.logger.info(
 268                             "NitosImporter: imported user: %s" % user_record)
 269                         self.remember_record(user_record)
 270                     else:
 271                         # update the record ?
 272                         # if user's primary key has changed then we need to update the
 273                         # users gid by forcing an update here
 274                         sfa_keys = user_record.reg_keys
 275
 276                         def sfa_key_in_list(sfa_key, nitos_user_keys):
 277                             for nitos_key in nitos_user_keys:
 278                                 if nitos_key == sfa_key:
 279                                     return True
 280                             return False
 281                         # are all the SFA keys known to nitos ?
 282                         new_keys = False
 283                         if not sfa_keys and user['keys']:
 284                             new_keys = True
 285                         else:
 286                             for sfa_key in sfa_keys:
 287                                 if not sfa_key_in_list(sfa_key.key, user['keys']):
 288                                     new_keys = True
 289
 290                         if new_keys:
 291                             (pubkey, pkey) = init_user_key(user)
 292                             user_gid = self.auth_hierarchy.create_gid(
 293                                 user_urn, create_uuid(), pkey)
 294                             if not pubkey:
 295                                 user_record.reg_keys = []
 296                             else:
 297                                 user_record.reg_keys = [RegKey(pubkey)]
 298                             user_record.gid = user_gid
 299                             user_record.just_updated()
 300                             self.logger.info(
 301                                 "NitosImporter: updated user: %s" % user_record)
 302                     user_record.email = user['email']
 303                     global_dbsession.commit()
 304                     user_record.stale = False
 305                 except:
 306                     self.logger.log_exc("NitosImporter: failed to import user %s %s" % (
 307                         user['user_id'], user['email']))
 308
 309             # import slices
 310             for slice in slices:
 311                 slice_hrn = slicename_to_hrn(
 312                     interface_hrn, site['name'], slice['slice_name'])
 313                 slice_record = self.locate_by_type_hrn('slice', slice_hrn)
 314                 if not slice_record:
 315                     try:
 316                         pkey = Keypair(create=True)
 317                         urn = hrn_to_urn(slice_hrn, 'slice')
 318                         slice_gid = self.auth_hierarchy.create_gid(
 319                             urn, create_uuid(), pkey)
 320                         slice_record = RegSlice(hrn=slice_hrn, gid=slice_gid,
 321                                                 pointer=slice['slice_id'],
 322                                                 authority=get_authority(slice_hrn))
 323                         slice_record.just_created()
 324                         global_dbsession.add(slice_record)
 325                         global_dbsession.commit()
 326                         self.logger.info(
 327                             "NitosImporter: imported slice: %s" % slice_record)
 328                         self.remember_record(slice_record)
 329                     except:
 330                         self.logger.log_exc(
 331                             "NitosImporter: failed to import slice")
 332                 else:
 333                     # xxx update the record ...
 334                     self.logger.warning("Slice update not yet implemented")
 335                     pass
 336                 # record current users affiliated with the slice
 337                 slice_record.reg_researchers = \
 338                     [self.locate_by_type_pointer('user', int(
 339                         user_id)) for user_id in slice['user_ids']]
 340                 global_dbsession.commit()
 341                 slice_record.stale = False
 342
 343         # remove stale records
 344         # special records must be preserved
 345         system_hrns = [interface_hrn, root_auth,
 346                        interface_hrn + '.slicemanager']
 347         for record in all_records:
 348             if record.hrn in system_hrns:
 349                 record.stale = False
 350             if record.peer_authority:
 351                 record.stale = False
 352
 353         for record in all_records:
 354             try:
 355                 stale = record.stale
 356             except:
 357                 stale = True
 358                 self.logger.warning("stale not found with %s" % record)
 359             if stale:
 360                 self.logger.info(
 361                     "NitosImporter: deleting stale record: %s" % record)
 362                 global_dbsession.delete(record)
 363                 global_dbsession.commit()