Name

       ganeti-confd - Ganeti conf daemon

Synopsis

       ganeti-confd [-f] [-d] [--syslog] [-p PORT] [-b ADDRESS] [--no-user-checks]

DESCRIPTION

       ganeti-confd is a daemon used to answer queries related to the configuration of a Ganeti cluster.

       For testing purposes, you can give the -f option and the program won't detach from the running terminal.

       Debug-level message can be activated by giving the -d option.

       Logging to syslog, rather than its own log file, can be enabled by passing in the --syslog option.

       The  ganeti-confd  daemon listens to port 1814 UDP, on all interfaces, by default.  The port can be over‐
       ridden by an entry the services database (usually /etc/services) or by passing the -p option.  The -b op‐
       tion can be used to specify the address to bind to (defaults to 0.0.0.0).

       The daemon will refuse to start if the user and group do not match the one defined at  build  time;  this
       behaviour can be overridden by the --no-user-checks option.

   ROLE
       The role of the conf daemon is to make sure we have a highly available and very fast way to query cluster
       configuration values.  This daemon is automatically active on all master candidates, and so has no single
       point  of  failure.  It communicates via UDP so each query can easily be sent to multiple servers, and it
       answers queries from a cached copy of the config it keeps in memory, so no disk access is required to get
       an answer.

       The config is reloaded from disk automatically when it changes, with a rate limit of once per second.

       If the conf daemon is stopped on all nodes, its clients won't be able to get query answers.

   COMMUNICATION PROTOCOL
       The confd protocol is an HMAC authenticated json-encoded custom format, over UDP.  A  client  library  is
       provided  to  make it easy to write software to query confd.  More information can be found in the Ganeti
       2.1 design doc, and an example usage can be seen in the (external) NBMA daemon for Ganeti.

REPORTING BUGS

       Report bugs to the project's issue tracker (https://github.com/ganeti/ganeti/issues) or contact  the  de‐
       velopers using the Ganeti mailing list.

SEE ALSO

       Ganeti overview and specifications: ganeti(7) (general overview), ganeti-os-interface(7) (guest OS defin‐
       itions), ganeti-extstorage-interface(7) (external storage providers).

       Ganeti  commands:  gnt-cluster(8) (cluster-wide commands), gnt-job(8) (job-related commands), gnt-node(8)
       (node-related commands), gnt-instance(8) (instance commands), gnt-os(8) (guest  OS  commands),  gnt-stor‐
       age(8) (storage commands), gnt-group(8) (node group commands), gnt-backup(8) (instance import/export com‐
       mands), gnt-debug(8) (debug commands).

       Ganeti  daemons: ganeti-watcher(8) (automatic instance restarter), ganeti-cleaner(8) (job queue cleaner),
       ganeti-noded(8) (node daemon), ganeti-rapi(8) (remote API daemon).

       Ganeti htools: htools(1) (generic binary), hbal(1) (cluster balancer), hspace(1) (capacity  calculation),
       hail(1) (IAllocator plugin), hscan(1) (data gatherer from remote clusters), hinfo(1) (cluster information
       printer), mon-collector(7) (data collectors interface).

COPYRIGHT

       Copyright (C) 2006-2015 Google Inc.  All rights reserved.

       Redistribution  and  use in source and binary forms, with or without modification, are permitted provided
       that the following conditions are met:

       1.  Redistributions of source code must retain the above copyright notice, this list  of  conditions  and
       the following disclaimer.

       2.  Redistributions in binary form must reproduce the above copyright notice, this list of conditions and
       the following disclaimer in the documentation and/or other materials provided with the distribution.

       THIS  SOFTWARE  IS  PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED
       WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND  FITNESS  FOR  A
       PARTICULAR  PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
       ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMIT‐
       ED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS  INTERRUP‐
       TION)  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (IN‐
       CLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF  ADVISED  OF
       THE POSSIBILITY OF SUCH DAMAGE.

Ganeti                                                                                           ganeti-confd(8)