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
       validity  status,  the  supported API versions, the supported parameters and variants (if any), and their
       documentation, 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
       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=*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
       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:

       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
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       LIMITED  TO,  PROCUREMENT  OF  SUBSTITUTE  GOODS  OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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