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6 <refentry id="ctdbd.1">
9 <refentrytitle>ctdbd</refentrytitle>
10 <manvolnum>1</manvolnum>
11 <refmiscinfo class="source">ctdb</refmiscinfo>
12 <refmiscinfo class="manual">CTDB - clustered TDB database</refmiscinfo>
16 <refname>ctdbd</refname>
17 <refpurpose>The CTDB cluster daemon</refpurpose>
22 <command>ctdbd</command>
23 <arg rep="repeat"><replaceable>OPTION</replaceable></arg>
28 <title>DESCRIPTION</title>
30 ctdbd is the main CTDB daemon.
34 Note that ctdbd is not usually invoked directly. It is invoked
35 via <citerefentry><refentrytitle>ctdbd_wrapper</refentrytitle>
36 <manvolnum>1</manvolnum></citerefentry> or via the initscript.
40 See <citerefentry><refentrytitle>ctdb</refentrytitle>
41 <manvolnum>7</manvolnum></citerefentry> for an overview of CTDB.
46 <title>GENERAL OPTIONS</title>
50 <term>-d, --debug=<parameter>DEBUGLEVEL</parameter></term>
53 This option sets the debug level to DEBUGLEVEL, which
54 controls what will be written by the logging
55 subsystem. The default is 2.
58 See the <citetitle>DEBUG LEVELS</citetitle> section in
59 <citerefentry><refentrytitle>ctdb</refentrytitle>
60 <manvolnum>7</manvolnum></citerefentry> for more
67 <term>--dbdir=<parameter>DIRECTORY</parameter></term>
70 DIRECTORY on local storage where ctdbd keeps a local copy of
71 TDB databases. This directory is local for each node and
72 should not be stored on the shared cluster filesystem.
75 Defaults to <filename>/usr/local/var/lib/ctdb</filename>.
81 <term>--dbdir-persistent=<parameter>DIRECTORY</parameter></term>
84 DIRECTORY on local storage where ctdbd keeps a local copy of
85 persistent TDB databases. This directory is local for each
86 node and should not be stored on the shared cluster
90 Defaults to <filename>/usr/local/var/lib/ctdb/persistent</filename>.
96 <term>--dbdir-state=<parameter>DIRECTORY</parameter></term>
99 DIRECTORY on local storage where ctdbd keep internal state
100 TDB files. This directory is local for each node and
101 should not be stored on the shared cluster filesystem.
104 Defaults to <filename>/usr/local/var/lib/ctdb/state</filename>.
110 <term>--event-script-dir=<parameter>DIRECTORY</parameter></term>
113 DIRECTORY where the CTDB event scripts are stored. See the
114 <citetitle>EVENT SCRIPTS</citetitle> section in
115 <citerefentry><refentrytitle>ctdb</refentrytitle>
116 <manvolnum>7</manvolnum></citerefentry> for more information.
119 Default is <envar>CTDB_BASE</envar>/events.d, so usually
120 <filename>/usr/local/etc/ctdb/events.d</filename>, which is part of
121 the CTDB installation.
127 <term>--listen=<parameter>IPADDR</parameter></term>
130 IPADDR is the private IP address that ctdbd will bind to.
133 By default ctdbd will select the first address from the
134 nodes list that in can bind to. See also
135 <citetitle>--nlist</citetitle>.
138 This option is only required when automatic address
139 detection can not be used. This can be the case when
140 running multiple ctdbd daemons/nodes on the same physical
141 host (usually for testing), using InfiniBand for the
142 private network or on Linux when sysctl
143 net.ipv4.ip_nonlocal_bind=1.
149 <term>--logging=<parameter>STRING</parameter></term>
152 STRING specifies where ctdbd will write its log. The
154 file:<filename>/usr/local/var/log/log.ctdb</filename>.
161 <term>file:<parameter>FILENAME</parameter></term>
164 FILENAME where ctdbd will write its log. This is usually
165 <filename>/usr/local/var/log/log.ctdb</filename>.
170 <term>syslog<optional>:<parameter>METHOD</parameter></optional></term>
173 CTDB will log to syslog. By default this will use
177 Under heavy loads syslog(3) can block if the syslog
178 daemon processes messages too slowly. This can
179 cause CTDB to block when logging.
182 If METHOD is specified then it specifies an
183 extension that causes logging to be done in a
184 non-blocking mode. Note that <emphasis>this may
185 cause messages to be dropped</emphasis>. METHOD
190 <term>nonblocking</term>
193 CTDB will log to syslog via
194 <filename>/dev/log</filename> in non-blocking
203 CTDB will log to syslog via UDP to
204 localhost:514. The syslog daemon must be
205 configured to listen on (at least)
206 localhost:514. Most syslog daemons will log
207 the messages with hostname "localhost" - this
208 is a limitation of the implementation, for
209 compatibility with more syslog daemons.
214 <term>udp-rfc5424</term>
217 As with "udp" but messages are sent in RFC5424
218 format. This method will log the correct
219 hostname but is not as widely implemented in
232 <term>--max-persistent-check-errors=<parameter>NUM</parameter></term>
235 NUM specifies the maximum number of health check failures
236 allowed for persistent databases during startup.
239 The default value is 0. Setting this to non-zero allows a
240 node with unhealthy persistent databases to startup and
241 join the cluster as long as there is another node with
242 healthy persistent databases.
248 <term>--nlist=<parameter>FILENAME</parameter></term>
251 FILENAME containing a list of the private IP addresses, one
252 per line, for each node in the cluster. This file
253 <emphasis>must be the same on each node</emphasis> in the
257 Default is <envar>CTDB_BASE</envar>/nodes, so usually
258 <filename>/usr/local/etc/ctdb/nodes</filename>.
264 <term>--no-lmaster</term>
267 This argument specifies that this node can NOT become an lmaster
268 for records in the database. This means that it will never show up
269 in the vnnmap. This feature is primarily used for making a cluster
270 span across a WAN link and use CTDB as a WAN-accelerator.
273 Please see the <citetitle>REMOTE CLUSTER NODES</citetitle>
274 section in <citerefentry><refentrytitle>ctdb</refentrytitle>
275 <manvolnum>7</manvolnum></citerefentry> for more
282 <term>--no-recmaster</term>
285 This argument specifies that this node can NOT become a recmaster
286 for the database. This feature is primarily used for making a cluster
287 span across a WAN link and use CTDB as a WAN-accelerator.
290 Please see the <citetitle>REMOTE CLUSTER NODES</citetitle>
291 section in <citerefentry><refentrytitle>ctdb</refentrytitle>
292 <manvolnum>7</manvolnum></citerefentry> for more
299 <term>--notification-script=<parameter>FILENAME</parameter></term>
302 FILENAME specifying a script to be invoked by ctdbd when
303 certain state changes occur.
307 <filename>/usr/local/etc/ctdb/notify.sh</filename>.
310 Please see the <citetitle>NOTIFICATION SCRIPT</citetitle>
311 section in <citerefentry><refentrytitle>ctdb</refentrytitle>
312 <manvolnum>7</manvolnum></citerefentry> for more
319 <term>--pidfile=<parameter>FILENAME</parameter></term>
322 FILENAME for file containing process ID of main CTDB
323 daemon. This file is automatically created and removed by
327 The default is to not create a PID file.
333 <term>--public_addresses=<parameter>FILENAME</parameter></term>
336 FILENAME specifying a file containing the public IP
337 addresses to use on the cluster when CTDB should use IP
338 takeover. This file contains a list of IP addresses,
339 netmasks and interfaces. CTDB will distribute these public
340 IP addresses appropriately across the available nodes.
343 The IP addresses specified in this file can differ across
347 This is usually the file
348 <filename>/usr/local/etc/ctdb/public_addresses</filename>
354 <term>--public-interface=<parameter>INTERFACE</parameter></term>
357 Default INTERFACE on which to attach public IP addresses.
360 When using public IP addresses, this is only required if
361 interfaces are not explicitly specified in the public
368 <term>--reclock=<parameter>LOCK</parameter></term>
371 LOCK specifies the cluster-wide mutex used to detect and
372 prevent a partitioned cluster (or "split brain").
375 For information about the recovery lock please see the
376 <citetitle>RECOVERY LOCK</citetitle> section in
377 <citerefentry><refentrytitle>ctdb</refentrytitle>
378 <manvolnum>7</manvolnum></citerefentry>.
384 <term>--start-as-disabled</term>
387 This makes ctdbd start in the DISABLED state.
390 To allow the node to host public IP addresses and
391 services, it must be manually enabled using the
392 <command>ctdb enable</command> command.
395 Please see the <citetitle>NODE STATES</citetitle> section
396 in <citerefentry><refentrytitle>ctdb</refentrytitle>
397 <manvolnum>7</manvolnum></citerefentry> for more
398 information about the DISABLED state.
404 <term>--start-as-stopped</term>
407 This makes ctdbd start in the STOPPED state.
410 To allow the node to take part in the cluster it must be
411 manually continued with the the <command>ctdb
412 enable</command> command.
415 Please see the <citetitle>NODE STATES</citetitle> section
416 in <citerefentry><refentrytitle>ctdb</refentrytitle>
417 <manvolnum>7</manvolnum></citerefentry> for more
418 information about the STOPPED state.
424 <term>--transport=tcp|infiniband</term>
427 This option specifies which transport to use for ctdbd
428 internode communications. The default is "tcp".
431 The "infiniband" support is not regularly tested.
437 <term>-?, --help</term>
440 Display a summary of options.
449 <title>DEBUGGING OPTIONS</title>
454 <term>-i, --interactive</term>
457 Enable interactive mode. This will make ctdbd run in the
458 foreground and not detach from the terminal. By default
459 ctdbd will detach itself and run in the background as a
466 <term>--nopublicipcheck</term>
469 This option is used when testing with multiple local
470 daemons on a single machine. It disables checks related
471 to public IP addresses.
477 <term>--nosetsched</term>
480 This is a debugging option. This option is only used when
484 Normally ctdbd will change its scheduler to run as a
485 real-time process. This is the default mode for a normal
486 ctdbd operation to gurarantee that ctdbd always gets the CPU
487 cycles that it needs.
490 This option is used to tell ctdbd to
491 <emphasis>not</emphasis> run as a real-time process and
492 instead run ctdbd as a normal userspace process. This is
493 useful for debugging and when you want to run ctdbd under
494 valgrind or gdb. (You don't want to attach valgrind or gdb
495 to a real-time process.)
501 <term>--socket=<parameter>FILENAME</parameter></term>
504 FILENAME specifies the name of the Unix domain socket that
505 ctdbd will create. This socket is used by local clients to
506 communicate with ctdbd.
509 The default is <filename>/usr/local/var/run/ctdb/ctdbd.socket</filename>.
510 You only need to use this option if you plan to run
511 multiple ctdbd daemons on the same physical host, usually
518 <term>--script-log-level=<parameter>DEBUGLEVEL</parameter></term>
521 This option sets the debug level of event script output to
522 DEBUGLEVEL. The default is ERR.
525 See the <citetitle>DEBUG LEVELS</citetitle> section in
526 <citerefentry><refentrytitle>ctdb</refentrytitle>
527 <manvolnum>7</manvolnum></citerefentry> for more
534 <term>--sloppy-start</term>
537 This is debugging option. This speeds up the initial
538 recovery during startup at the expense of some consistency
539 checking. <emphasis>Don't use this option in
540 production</emphasis>.
546 <term>--torture</term>
549 This option is only used for development and testing of
550 CTDB. It adds artificial errors and failures to the
551 common codepaths in ctdbd to verify that ctdbd can recover
552 correctly from failures.
555 <emphasis>Do not use this option</emphasis> unless you are
556 developing and testing new functionality in CTDB.
562 <term>--valgrinding</term>
565 This is a debugging option. This option is only used when
566 debugging ctdbd. This enables additional debugging
567 capabilities and implies --nosetsched.
576 <title>SEE ALSO</title>
578 <citerefentry><refentrytitle>ctdb</refentrytitle>
579 <manvolnum>1</manvolnum></citerefentry>,
581 <citerefentry><refentrytitle>ctdbd_wrapper</refentrytitle>
582 <manvolnum>1</manvolnum></citerefentry>,
584 <citerefentry><refentrytitle>onnode</refentrytitle>
585 <manvolnum>1</manvolnum></citerefentry>,
587 <citerefentry><refentrytitle>ctdb</refentrytitle>
588 <manvolnum>7</manvolnum></citerefentry>,
590 <citerefentry><refentrytitle>ctdb-tunables</refentrytitle>
591 <manvolnum>7</manvolnum></citerefentry>,
593 <ulink url="http://ctdb.samba.org/"/>
600 This documentation was written by
609 <holder>Andrew Tridgell</holder>
610 <holder>Ronnie Sahlberg</holder>
614 This program is free software; you can redistribute it and/or
615 modify it under the terms of the GNU General Public License as
616 published by the Free Software Foundation; either version 3 of
617 the License, or (at your option) any later version.
620 This program is distributed in the hope that it will be
621 useful, but WITHOUT ANY WARRANTY; without even the implied
622 warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
623 PURPOSE. See the GNU General Public License for more details.
626 You should have received a copy of the GNU General Public
627 License along with this program; if not, see
628 <ulink url="http://www.gnu.org/licenses"/>.