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/>.
28 # ensure we get messages out immediately, so they get in the samba logs,
29 # and don't get swallowed by a timeout
30 os.environ['PYTHONUNBUFFERED'] = '1'
32 # forcing GMT avoids a problem in some timezones with kerberos. Both MIT
33 # heimdal can get mutual authentication errors due to the 24 second difference
34 # between UTC and GMT when using some zone files (eg. the PDT zone from
36 os.environ["TZ"] = "GMT"
38 # Find right directory when running from source tree
39 sys.path.insert(0, "bin/python")
44 from samba import getopt as options
46 from samba.kcc.graph_utils import verify_and_dot, list_verify_tests
47 from samba.kcc.graph_utils import GraphError
50 from samba.kcc.debug import logger, DEBUG, DEBUG_FN
51 from samba.kcc import KCC
53 # If DEFAULT_RNG_SEED is None, /dev/urandom or system time is used.
54 DEFAULT_RNG_SEED = None
57 def test_all_reps_from(kcc, dburl, lp, creds, unix_now, rng_seed=None,
59 """Run the KCC from all DSAs in read-only mode
61 The behaviour depends on the global opts variable which contains
62 command line variables. Usually you will want to run it with
63 opt.dot_file_dir set (via --dot-file-dir) to see the graphs that
64 would be created from each DC.
66 :param lp: a loadparm object.
67 :param creds: a Credentials object.
68 :param unix_now: the unix epoch time as an integer
69 :param rng_seed: a seed for the random number generator
72 # This implies readonly and attempt_live_connections
73 dsas = kcc.list_dsas()
79 for site in kcc.site_table.values():
80 guid_to_dnstr.update((str(dsa.dsa_guid), dnstr)
81 for dnstr, dsa in site.dsa_table.items())
89 if rng_seed is not None:
91 kcc = KCC(unix_now, readonly=True,
92 verify=opts.verify, debug=opts.debug,
93 dot_file_dir=opts.dot_file_dir)
94 if ldif_file is not None:
96 # The dburl in this case is a temporary database.
97 # Its non-existence is ensured at the script startup.
98 # If it exists, it is from a previous iteration of
99 # this loop -- unless we're in an unfortunate race.
100 # Because this database is temporary, it lacks some
101 # detail and needs to be re-created anew to set the
107 kcc.import_ldif(dburl, lp, ldif_file, dsa_dn)
110 kcc.run(dburl, lp, creds, forced_local_dsa=dsa_dn,
111 forget_local_links=opts.forget_local_links,
112 forget_intersite_links=opts.forget_intersite_links,
113 attempt_live_connections=opts.attempt_live_connections)
115 current, needed = kcc.my_dsa.get_rep_tables()
117 for dsa in kcc.my_site.dsa_table.values():
118 if dsa is kcc.my_dsa:
120 kcc.translate_ntdsconn(dsa)
121 c, n = dsa.get_rep_tables()
125 for name, rep_table, rep_parts in (
126 ('needed', needed, needed_parts),
127 ('current', current, current_parts)):
128 for part, nc_rep in rep_table.items():
129 edges = rep_parts.setdefault(part, [])
130 for reps_from in nc_rep.rep_repsFrom:
131 source = guid_to_dnstr[str(reps_from.source_dsa_obj_guid)]
132 dest = guid_to_dnstr[str(nc_rep.rep_dsa_guid)]
133 edges.append((source, dest))
135 for site in kcc.site_table.values():
136 for dsa in site.dsa_table.values():
138 vertex_colours.append('#cc0000')
140 vertex_colours.append('#0000cc')
141 dot_vertices.append(dsa.dsa_dnstr)
142 if dsa.connect_table:
143 DEBUG_FN("DSA %s %s connections:\n%s" %
144 (dsa.dsa_dnstr, len(dsa.connect_table),
145 [x.from_dnstr for x in
146 dsa.connect_table.values()]))
147 for con in dsa.connect_table.values():
148 if con.is_rodc_topology():
149 colours.append('red')
151 colours.append('blue')
152 dot_edges.append((con.from_dnstr, dsa.dsa_dnstr))
154 verify_and_dot('all-dsa-connections', dot_edges, vertices=dot_vertices,
155 label="all dsa NTDSConnections", properties=(),
156 debug=DEBUG, verify=opts.verify,
157 dot_file_dir=opts.dot_file_dir,
158 directed=True, edge_colors=colours,
159 vertex_colors=vertex_colours)
161 for name, rep_parts in (('needed', needed_parts),
162 ('current', current_parts)):
163 for part, edges in rep_parts.items():
164 verify_and_dot('all-repsFrom_%s__%s' % (name, part), edges,
165 directed=True, label=part,
166 properties=(), debug=DEBUG, verify=opts.verify,
167 dot_file_dir=opts.dot_file_dir)
169 ##################################################
170 # samba_kcc entry point
171 ##################################################
174 parser = optparse.OptionParser("samba_kcc [options]")
175 sambaopts = options.SambaOptions(parser)
176 credopts = options.CredentialsOptions(parser)
178 parser.add_option_group(sambaopts)
179 parser.add_option_group(credopts)
180 parser.add_option_group(options.VersionOptions(parser))
182 parser.add_option("--readonly", default=False,
183 help="compute topology but do not update database",
186 parser.add_option("--debug",
190 parser.add_option("--verify",
191 help="verify that assorted invariants are kept",
194 parser.add_option("--list-verify-tests",
195 help=("list what verification actions are available "
196 "and do nothing else"),
199 parser.add_option("--dot-file-dir", default=None,
200 help="Write Graphviz .dot files to this directory")
202 parser.add_option("--seed",
203 help="random number seed",
204 type=int, default=DEFAULT_RNG_SEED)
206 parser.add_option("--importldif",
207 help="import topology ldif file",
208 type=str, metavar="<file>")
210 parser.add_option("--exportldif",
211 help="export topology ldif file",
212 type=str, metavar="<file>")
214 parser.add_option("-H", "--URL",
215 help="LDB URL for database or target server",
216 type=str, metavar="<URL>", dest="dburl")
218 parser.add_option("--tmpdb",
219 help="schemaless database file to create for ldif import",
220 type=str, metavar="<file>")
222 parser.add_option("--now",
223 help=("assume current time is this ('YYYYmmddHHMMSS[tz]',"
224 " default: system time)"),
225 type=str, metavar="<date>")
227 parser.add_option("--forced-local-dsa",
228 help="run calculations assuming the DSA is this DN",
229 type=str, metavar="<DSA>")
231 parser.add_option("--attempt-live-connections", default=False,
232 help="Attempt to connect to other DSAs to test links",
235 parser.add_option("--list-valid-dsas", default=False,
236 help=("Print a list of DSA dnstrs that could be"
237 " used in --forced-local-dsa"),
240 parser.add_option("--test-all-reps-from", default=False,
241 help="Create and verify a graph of reps-from for every DSA",
244 parser.add_option("--forget-local-links", default=False,
245 help="pretend not to know the existing local topology",
248 parser.add_option("--forget-intersite-links", default=False,
249 help="pretend not to know the existing intersite topology",
252 opts, args = parser.parse_args()
255 if opts.list_verify_tests:
259 if opts.test_all_reps_from:
263 logger.setLevel(logging.DEBUG)
265 logger.setLevel(logging.INFO)
267 logger.setLevel(logging.WARNING)
269 random.seed(opts.seed)
272 for timeformat in ("%Y%m%d%H%M%S%Z", "%Y%m%d%H%M%S"):
274 now_tuple = time.strptime(opts.now, timeformat)
279 # else happens if break doesn't --> no match
280 print("could not parse time '%s'" % (opts.now), file = sys.stderr)
282 unix_now = int(time.mktime(now_tuple))
284 unix_now = int(time.time())
286 lp = sambaopts.get_loadparm()
287 # only log warnings/errors by default, unless the user has specified otherwise
288 if opts.debug is None:
289 lp.set('log level', '1')
291 creds = credopts.get_credentials(lp, fallback_machine=True)
293 if opts.dburl is None:
295 opts.dburl = opts.tmpdb
297 opts.dburl = lp.samdb_url()
298 elif opts.importldif:
299 logger.error("Don't use -H/--URL with --importldif, use --tmpdb instead")
302 # Instantiate Knowledge Consistency Checker and perform run
303 kcc = KCC(unix_now, readonly=opts.readonly, verify=opts.verify,
304 debug=opts.debug, dot_file_dir=opts.dot_file_dir)
307 rc = kcc.export_ldif(opts.dburl, lp, creds, opts.exportldif)
311 if opts.tmpdb is None or opts.tmpdb.startswith('ldap'):
312 logger.error("Specify a target temp database file with --tmpdb option")
314 if os.path.exists(opts.tmpdb):
315 logger.error("The temp database file (%s) specified with --tmpdb "
316 "already exists. We refuse to clobber it." % opts.tmpdb)
319 rc = kcc.import_ldif(opts.tmpdb, lp, opts.importldif,
320 forced_local_dsa=opts.forced_local_dsa)
325 kcc.load_samdb(opts.dburl, lp, creds, force=False)
327 if opts.test_all_reps_from:
328 test_all_reps_from(kcc, opts.dburl, lp, creds, unix_now,
330 ldif_file=opts.importldif)
333 if opts.list_valid_dsas:
334 print('\n'.join(kcc.list_dsas()))
338 rc = kcc.run(opts.dburl, lp, creds, opts.forced_local_dsa,
339 opts.forget_local_links, opts.forget_intersite_links,
340 attempt_live_connections=opts.attempt_live_connections)
343 except GraphError as e: