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

       This  command  will  list  detailed  information  about  each OS available in the cluster,
       including its validity status, the supported API versions, the  supported  parameters  and
       variants (if any), and their documentation, etc.

       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 parameters 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=*yes|no*] [--blacklisted=*yes|no*]
       {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 allowed 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 operating systems not yet known to gnt-os.

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

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-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:

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       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.

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