Ubuntu Manpage: ctdbd - The CTDB cluster daemon

NAME

       ctdbd - The CTDB cluster daemon

SYNOPSIS


       ctdbd [OPTION...]

DESCRIPTION

       ctdbd is the main CTDB daemon.

       Note that ctdbd is not usually invoked directly. It is invoked via ctdbd_wrapper(1) or via the
       initscript.

       See ctdb(7) for an overview of CTDB.

GENERAL OPTIONS

       -d, --debug=DEBUGLEVEL
           This option sets the debug level to DEBUGLEVEL, which controls what will be written to the logfile.
           The default is 0 which will only log important events and errors. A larger number will provide
           additional logging.

           See the DEBUG LEVELS section in ctdb(7) for more information.

       --dbdir=DIRECTORY
           DIRECTORY on local storage where ctdbd keeps a local copy of TDB databases. This directory is local
           for each node and should not be stored on the shared cluster filesystem.

           This directory would usually be /var/ctdb

       --dbdir-persistent=DIRECTORY
           DIRECTORY on local storage where ctdbd keeps a local copy of persistent TDB databases. This directory
           is local for each node and should not be stored on the shared cluster filesystem.

           This directory would usually be /etc/ctdb/persistent

       --dbdir-state=DIRECTORY
           DIRECTORY on local storage where ctdbd keep internal state TDB files. This directory is local for
           each node and should not be stored on the shared cluster filesystem.

           This directory would usually be /var/ctdb/state

       --event-script-dir=DIRECTORY
           DIRECTORY where the CTDB event scripts are stored. See the EVENT SCRIPTS section in ctdb(7) for more
           information.

           Default is CTDB_BASE/events.d, so usually /etc/ctdb/events.d, which is part of the CTDB installation.

       --logfile=FILENAME
           FILENAME where ctdbd will write its log. This is usually /var/log/log.ctdb.

       --log-ringbuf-size=NUM
           Set the size of the log ringbuffer to NUM entries.

           CTDB uses an in-memory ringbuffer containing NUM most recent log entries for all log levels (except
           DEBUG). The ringbugger can be useful for extracting detailed logs even if some entries are not logged
           to the regular logs.

           Use the ctdb getlog command to retrieve log entries from the ringbuffer.

       --lvs
           This option is used to activate the LVS capability on a CTDB node. Please see the LVS section in
           ctdb(7) for more information.

       --max-persistent-check-errors=NUM
           NUM specifies the maximum number of health check failures allowed for persistent databases during
           startup.

           The default value is 0. Setting this to non-zero allows a node with unhealthy persistent databases to
           startup and join the cluster as long as there is another node with healthy persistent databases.

       --nlist=FILENAME
           FILENAME containing a list of the private IP addresses, one per line, for each node in the cluster.
           This file must be the same on each node in the cluster.

           Default is CTDB_BASE/nodes, so usually /etc/ctdb/nodes.

       --no-lmaster
           This argument specifies that this node can NOT become an lmaster for records in the database. This
           means that it will never show up in the vnnmap. This feature is primarily used for making a cluster
           span across a WAN link and use CTDB as a WAN-accelerator.

           Please see the REMOTE CLUSTER NODES section in ctdb(7) for more information.

       --no-recmaster
           This argument specifies that this node can NOT become a recmaster for the database. This feature is
           primarily used for making a cluster span across a WAN link and use CTDB as a WAN-accelerator.

           Please see the REMOTE CLUSTER NODES section in ctdb(7) for more information.

       --notification-script=FILENAME
           FILENAME specifying a script to be invoked by ctdbd when certain state changes occur.

           This file is usually /etc/ctdb/notify.sh.

           Please see the NOTIFICATION SCRIPT section in ctdb(7) for more information.

       --pidfile=FILENAME
           FILENAME for file containing process ID of main CTDB daemon. This file is automatically created and
           removed by CTDB.

           The default is to not create a PID file.

       --public_addresses=FILENAME
           FILENAME specifying a file containing the public IP addresses to use on the cluster when CTDB should
           use IP takeover. This file contains a list of IP addresses, netmasks and interfaces. CTDB will
           distribute these public IP addresses appropriately across the available nodes.

           The IP addresses specified in this file can differ across nodes.

           This is usually the file /etc/ctdb/public_addresses

       --public-interface=INTERFACE
           INTERFACE on which to attach public IP addresses or on which to attach the single-public-ip when
           used.

           When using public IP addresses, this is only required if interfaces are not explicitly specified in
           the public addresses file.

       --reclock=FILENAME
           FILENAME is the name of the recovery lock file stored in shared storage that ctdbd uses to prevent
           split brains from occuring.

           It is possible to run CTDB without a recovery lock file, but then there will be no protection against
           split brain if the cluster/network becomes partitioned. Using CTDB without a reclock file is strongly
           discouraged.

       --single-public-ip=IPADDR
           IPADDR specifies the single IP that CTDB will use in conjuction with LVS.

           Please see the LVS section in ctdb(7) for more information.

       --start-as-disabled
           This makes ctdbd start in the DISABLED state.

           To allow the node to host public IP addresses and services, it must be manually enabled using the
           ctdb enable command.

           Please see the NODE STATES section in ctdb(7) for more information about the DISABLED state.

       --start-as-stopped
           This makes ctdbd start in the STOPPED state.

           To allow the node to take part in the cluster it must be manually continued with the the ctdb enable
           command.

           Please see the NODE STATES section in ctdb(7) for more information about the STOPPED state.

       --syslog
           Send log messages to syslog instead of the CTDB logfile. This option overrides --logfile. The default
           is to log to a file.

       --transport=tcp|infiniband
           This option specifies which transport to use for ctdbd internode communications. The default is
           "tcp".

           The "infiniband" support is not regularly tested.

       -?, --help
           Display a summary of options.

DEBUGGING OPTIONS

-i, --interactive
Enable interactive mode. This will make ctdbd run in the foreground and not detach from the terminal.
By default ctdbd will detach itself and run in the background as a daemon.

--listen=IPADDR
This specifies which IP address that ctdbd will bind to.

By default ctdbd will bind to the first address it finds in the /etc/ctdb/nodes file that is also
present on the local system.

This option is only required when you want to run multiple ctdbd daemons/nodes on the same physical
host in which case there would be multiple entries in /etc/ctdb/nodes that would match a local
interface.

--nopublicipcheck
This option is used when testing with multiple local daemons on a single machine. It disables checks
related to public IP addresses.

--nosetsched
This is a debugging option. This option is only used when debugging ctdbd.

Normally ctdbd will change its scheduler to run as a real-time process. This is the default mode for
a normal ctdbd operation to gurarantee that ctdbd always gets the CPU cycles that it needs.

This option is used to tell ctdbd to not run as a real-time process and instead run ctdbd as a normal
userspace process. This is useful for debugging and when you want to run ctdbd under valgrind or gdb.
(You don't want to attach valgrind or gdb to a real-time process.)

--socket=FILENAME
FILENAME specifies the name of the Unix domain socket that ctdbd will create. This socket is used by
local clients to communicate with ctdbd.

The default is /tmp/ctdb.socket . You only need to use this option if you plan to run multiple ctdbd
daemons on the same physical host, usually for testing.

--script-log-level=DEBUGLEVEL
This option sets the debug level of event script output to DEBUGLEVEL. The default is ERR (0).

See the DEBUG LEVELS section in ctdb(7) for more information.

--sloppy-start
This is debugging option. This speeds up the initial recovery during startup at the expense of some
consistency checking. Don't use this option in production.

--torture
This option is only used for development and testing of CTDB. It adds artificial errors and failures
to the common codepaths in ctdbd to verify that ctdbd can recover correctly from failures.

Do not use this option unless you are developing and testing new functionality in CTDB.

--valgrinding
This is a debugging option. This option is only used when debugging ctdbd. This enables additional
debugging capabilities and implies --nosetsched.

AUTHOR

       This documentation was written by Ronnie Sahlberg, Amitay Isaacs, Martin Schwenke

COPYRIGHT

       Copyright © 2007 Andrew Tridgell, Ronnie Sahlberg

       This program is free software; you can redistribute it and/or modify it under the terms of the GNU
       General Public License as published by the Free Software Foundation; either version 3 of the License, or
       (at your option) any later version.

       This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
       the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
       License for more details.

       You should have received a copy of the GNU General Public License along with this program; if not, see
       http://www.gnu.org/licenses.

ctdb                                               11/27/2013                                           CTDBD(1)