3 # Compute our KCC topology
5 # Copyright (C) Dave Craft 2011
6 # Copyright (C) Andrew Bartlett 2015
8 # Andrew Bartlett's alleged work performed by his underlings Douglas
9 # Bagnall and Garming Sam.
11 # This program is free software; you can redistribute it and/or modify
12 # it under the terms of the GNU General Public License as published by
13 # the Free Software Foundation; either version 3 of the License, or
14 # (at your option) any later version.
16 # This program is distributed in the hope that it will be useful,
17 # but WITHOUT ANY WARRANTY; without even the implied warranty of
18 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 # GNU General Public License for more details.
21 # You should have received a copy of the GNU General Public License
22 # along with this program. If not, see <http://www.gnu.org/licenses/>.
23 from __future__ import print_function
29 # ensure we get messages out immediately, so they get in the samba logs,
30 # and don't get swallowed by a timeout
31 os.environ['PYTHONUNBUFFERED'] = '1'
33 # forcing GMT avoids a problem in some timezones with kerberos. Both MIT
34 # heimdal can get mutual authentication errors due to the 24 second difference
35 # between UTC and GMT when using some zone files (eg. the PDT zone from
37 os.environ["TZ"] = "GMT"
39 # Find right directory when running from source tree
40 sys.path.insert(0, "bin/python")
45 from samba import getopt as options
47 from samba.kcc.graph_utils import verify_and_dot, list_verify_tests
48 from samba.kcc.graph_utils import GraphError
51 from samba.kcc.debug import logger, DEBUG, DEBUG_FN
52 from samba.kcc import KCC
54 # If DEFAULT_RNG_SEED is None, /dev/urandom or system time is used.
55 DEFAULT_RNG_SEED = None
58 def test_all_reps_from(kcc, dburl, lp, creds, unix_now, rng_seed=None,
60 """Run the KCC from all DSAs in read-only mode
62 The behaviour depends on the global opts variable which contains
63 command line variables. Usually you will want to run it with
64 opt.dot_file_dir set (via --dot-file-dir) to see the graphs that
65 would be created from each DC.
67 :param lp: a loadparm object.
68 :param creds: a Credentials object.
69 :param unix_now: the unix epoch time as an integer
70 :param rng_seed: a seed for the random number generator
73 # This implies readonly and attempt_live_connections
74 dsas = kcc.list_dsas()
80 for site in kcc.site_table.values():
81 guid_to_dnstr.update((str(dsa.dsa_guid), dnstr)
82 for dnstr, dsa in site.dsa_table.items())
90 if rng_seed is not None:
92 kcc = KCC(unix_now, readonly=True,
93 verify=opts.verify, debug=opts.debug,
94 dot_file_dir=opts.dot_file_dir)
95 if ldif_file is not None:
97 # The dburl in this case is a temporary database.
98 # Its non-existence is ensured at the script startup.
99 # If it exists, it is from a previous iteration of
100 # this loop -- unless we're in an unfortunate race.
101 # Because this database is temporary, it lacks some
102 # detail and needs to be re-created anew to set the
108 kcc.import_ldif(dburl, lp, ldif_file, dsa_dn)
111 kcc.run(dburl, lp, creds, forced_local_dsa=dsa_dn,
112 forget_local_links=opts.forget_local_links,
113 forget_intersite_links=opts.forget_intersite_links,
114 attempt_live_connections=opts.attempt_live_connections)
116 current, needed = kcc.my_dsa.get_rep_tables()
118 for dsa in kcc.my_site.dsa_table.values():
119 if dsa is kcc.my_dsa:
121 kcc.translate_ntdsconn(dsa)
122 c, n = dsa.get_rep_tables()
126 for name, rep_table, rep_parts in (
127 ('needed', needed, needed_parts),
128 ('current', current, current_parts)):
129 for part, nc_rep in rep_table.items():
130 edges = rep_parts.setdefault(part, [])
131 for reps_from in nc_rep.rep_repsFrom:
132 source = guid_to_dnstr[str(reps_from.source_dsa_obj_guid)]
133 dest = guid_to_dnstr[str(nc_rep.rep_dsa_guid)]
134 edges.append((source, dest))
136 for site in kcc.site_table.values():
137 for dsa in site.dsa_table.values():
139 vertex_colours.append('#cc0000')
141 vertex_colours.append('#0000cc')
142 dot_vertices.append(dsa.dsa_dnstr)
143 if dsa.connect_table:
144 DEBUG_FN("DSA %s %s connections:\n%s" %
145 (dsa.dsa_dnstr, len(dsa.connect_table),
146 [x.from_dnstr for x in
147 dsa.connect_table.values()]))
148 for con in dsa.connect_table.values():
149 if con.is_rodc_topology():
150 colours.append('red')
152 colours.append('blue')
153 dot_edges.append((con.from_dnstr, dsa.dsa_dnstr))
155 verify_and_dot('all-dsa-connections', dot_edges, vertices=dot_vertices,
156 label="all dsa NTDSConnections", properties=(),
157 debug=DEBUG, verify=opts.verify,
158 dot_file_dir=opts.dot_file_dir,
159 directed=True, edge_colors=colours,
160 vertex_colors=vertex_colours)
162 for name, rep_parts in (('needed', needed_parts),
163 ('current', current_parts)):
164 for part, edges in rep_parts.items():
165 verify_and_dot('all-repsFrom_%s__%s' % (name, part), edges,
166 directed=True, label=part,
167 properties=(), debug=DEBUG, verify=opts.verify,
168 dot_file_dir=opts.dot_file_dir)
170 ##################################################
171 # samba_kcc entry point
172 ##################################################
175 parser = optparse.OptionParser("samba_kcc [options]")
176 sambaopts = options.SambaOptions(parser)
177 credopts = options.CredentialsOptions(parser)
179 parser.add_option_group(sambaopts)
180 parser.add_option_group(credopts)
181 parser.add_option_group(options.VersionOptions(parser))
183 parser.add_option("--readonly", default=False,
184 help="compute topology but do not update database",
187 parser.add_option("--debug",
191 parser.add_option("--verify",
192 help="verify that assorted invariants are kept",
195 parser.add_option("--list-verify-tests",
196 help=("list what verification actions are available "
197 "and do nothing else"),
200 parser.add_option("--dot-file-dir", default=None,
201 help="Write Graphviz .dot files to this directory")
203 parser.add_option("--seed",
204 help="random number seed",
205 type=int, default=DEFAULT_RNG_SEED)
207 parser.add_option("--importldif",
208 help="import topology ldif file",
209 type=str, metavar="<file>")
211 parser.add_option("--exportldif",
212 help="export topology ldif file",
213 type=str, metavar="<file>")
215 parser.add_option("-H", "--URL",
216 help="LDB URL for database or target server",
217 type=str, metavar="<URL>", dest="dburl")
219 parser.add_option("--tmpdb",
220 help="schemaless database file to create for ldif import",
221 type=str, metavar="<file>")
223 parser.add_option("--now",
224 help=("assume current time is this ('YYYYmmddHHMMSS[tz]',"
225 " default: system time)"),
226 type=str, metavar="<date>")
228 parser.add_option("--forced-local-dsa",
229 help="run calculations assuming the DSA is this DN",
230 type=str, metavar="<DSA>")
232 parser.add_option("--attempt-live-connections", default=False,
233 help="Attempt to connect to other DSAs to test links",
236 parser.add_option("--list-valid-dsas", default=False,
237 help=("Print a list of DSA dnstrs that could be"
238 " used in --forced-local-dsa"),
241 parser.add_option("--test-all-reps-from", default=False,
242 help="Create and verify a graph of reps-from for every DSA",
245 parser.add_option("--forget-local-links", default=False,
246 help="pretend not to know the existing local topology",
249 parser.add_option("--forget-intersite-links", default=False,
250 help="pretend not to know the existing intersite topology",
253 opts, args = parser.parse_args()
256 if opts.list_verify_tests:
260 if opts.test_all_reps_from:
264 logger.setLevel(logging.DEBUG)
266 logger.setLevel(logging.INFO)
268 logger.setLevel(logging.WARNING)
270 random.seed(opts.seed)
273 for timeformat in ("%Y%m%d%H%M%S%Z", "%Y%m%d%H%M%S"):
275 now_tuple = time.strptime(opts.now, timeformat)
280 # else happens if break doesn't --> no match
281 print("could not parse time '%s'" % (opts.now), file = sys.stderr)
283 unix_now = int(time.mktime(now_tuple))
285 unix_now = int(time.time())
287 lp = sambaopts.get_loadparm()
288 # only log warnings/errors by default, unless the user has specified otherwise
289 if opts.debug is None:
290 lp.set('log level', '1')
292 creds = credopts.get_credentials(lp, fallback_machine=True)
294 if opts.dburl is None:
296 opts.dburl = opts.tmpdb
298 opts.dburl = lp.samdb_url()
299 elif opts.importldif:
300 logger.error("Don't use -H/--URL with --importldif, use --tmpdb instead")
303 # Instantiate Knowledge Consistency Checker and perform run
304 kcc = KCC(unix_now, readonly=opts.readonly, verify=opts.verify,
305 debug=opts.debug, dot_file_dir=opts.dot_file_dir)
308 rc = kcc.export_ldif(opts.dburl, lp, creds, opts.exportldif)
312 if opts.tmpdb is None or opts.tmpdb.startswith('ldap'):
313 logger.error("Specify a target temp database file with --tmpdb option")
315 if os.path.exists(opts.tmpdb):
316 logger.error("The temp database file (%s) specified with --tmpdb "
317 "already exists. We refuse to clobber it." % opts.tmpdb)
320 rc = kcc.import_ldif(opts.tmpdb, lp, opts.importldif,
321 forced_local_dsa=opts.forced_local_dsa)
326 kcc.load_samdb(opts.dburl, lp, creds, force=False)
328 if opts.test_all_reps_from:
329 test_all_reps_from(kcc, opts.dburl, lp, creds, unix_now,
331 ldif_file=opts.importldif)
334 if opts.list_valid_dsas:
335 print('\n'.join(kcc.list_dsas()))
339 rc = kcc.run(opts.dburl, lp, creds, opts.forced_local_dsa,
340 opts.forget_local_links, opts.forget_intersite_links,
341 attempt_live_connections=opts.attempt_live_connections)
344 except GraphError as e: