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.

Ganeti                                                                                           ganeti-confd(8)