Name

       ganeti-confd - Ganeti conf daemon

Synopsis

       ganeti-confd [-f] [-d]

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 overridden by an entry the services database (usually /etc/services) or by passing
       the -p option.  The -b option 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  project  website  (http://code.google.com/p/ganeti/)  or  contact  the
       developers using the Ganeti mailing list (ganeti@googlegroups.com).

SEE ALSO

       Ganeti overview and specifications: ganeti(7) (general  overview),  ganeti-os-interface(7)
       (guest OS definitions), 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-storage(8) (storage commands), gnt-group(8) (node group
       commands), gnt-backup(8) (instance import/export commands), 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-masterd(8) (master 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, 2007, 2008, 2009, 2010, 2011, 2012 Google Inc.  Permission is  granted
       to  copy,  distribute  and/or  modify under the terms of the GNU General Public License as
       published by the Free Software Foundation; either version 2 of the License,  or  (at  your
       option) any later version.

       On  Debian  systems,  the  complete text of the GNU General Public License can be found in
       /usr/share/common-licenses/GPL.