Name

       gnt-os - Instance operating system administration

Synopsis

       gnt-os {command} [arguments...]

DESCRIPTION

       The  gnt-os is used for managing the list of available operating system flavours for the instances in the
       Ganeti cluster.

COMMANDS

   LIST
       list [--no-headers]

       Gives the list of available/supported OS to use in the instances.  When creating  the  instance  you  can
       give the OS-name as an option.

       Note that hidden or blacklisted OSes are not displayed by this command, use diagnose for showing those.

   DIAGNOSE
       diagnose

       This  command  will  help  you see why an installed OS is not available in the cluster.  The list command
       shows only the OS-es that the cluster sees available on all nodes.  It could be that some OS  is  missing
       from  a  node, or is only partially installed, and this command will show the details of all the OSes and
       the reasons they are or are not valid.

   INFO
       info {OS}

       This command will list detailed information about each OS available in the cluster, including its validi‐
       ty status, the supported API versions, the supported parameters and variants (if any), and their documen‐
       tation, etc.  If an OS name is given, then only the specified OS details will be shown.

       Note that this command besides the information about the given OS(es), shows detailed  information  about
       the  given  available/supported  OS variant(s), in terms of the modified per-OS hypervisor parameters and
       the modified per-OS parameters passed to the OS install scripts.

       For the list of the available OSes use list.  Also, see modify for a description of how to modify the pa‐
       rameters for a specific operating system.

   MODIFY
       modify [--submit] [--print-jobid]
       [ [ -O | --os-parameters ] =*option*=*value*]
       [ --os-parameters-private=*option*=*value*]
       [-H HYPERVISOR:option=*value*[,...]]
       [--hidden=*yesno*]
       {OS}

       This command will allow you to modify OS parameters.

       To modify the per-OS hypervisor parameters (which override the global hypervisor parameters), you can run
       modify -H with the same syntax as in gnt-cluster init to override default hypervisor  parameters  of  the
       cluster for specified OS argument.

       To  modify the parameters passed to the OS install scripts, use the --os-parameters option.  If the value
       of the parameter should not be saved to logs, use --os-parameters-private and make sure  that  no  Ganeti
       daemon  or  program is running in debug mode.  ganeti-luxid in particular will issue a warning at startup
       time if ran in debug mode.

       To modify the hidden and blacklisted states of an OS, pass the options --hidden yes|no,  or  respectively
       --blacklisted ....  The 'hidden' state means that an OS won't be listed by default in the OS list, but is
       available  for installation.  The 'blacklisted' state means that the OS is not listed and is also not al‐
       lowed for new instance creations (but can be used for reinstalling old instances).

       Note: The given operating system doesn't have to exist.  This allows preseeding the settings for  operat‐
       ing systems not yet known to gnt-os.

       See ganeti(7) for a description of --submit and other common options.

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                                                                                                 gnt-os(8)