Provided by: ganeti2_2.4.5-1_all bug


       gnt-group - Ganeti node-group administration


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


       The gnt-group command is used for node group administration in the Ganeti system.



       Creates  a  new  group with the given name. The node group will be initially empty; to add
       nodes to it, use gnt-group assign-nodes.

       The --node-parameters option allows you to set default node parameters for  nodes  in  the
       group. Please see ganeti(7) for more information about supported key=value pairs.

       The --alloc-policy option allows you to set an allocation policy for the group at creation
       time. Possible values are:

              nodes in the group should not  be  candidates  for  instance  allocation,  and  the
              operation  (e.g., instance creation) should fail if only groups in this state could
              be found to satisfy the requirements.

              nodes in the group should not be used for instance allocations, unless  this  would
              be the only way to have the operation succeed.

              nodes  in  the  group  can  be used freely for allocation of instances (this is the
              default). Note that prioritization among groups in this state will be  deferred  to
              the iallocator plugin that's being used.

       {group} {node...}

       Assigns  one  or  more nodes to the specified group, moving them from their original group
       (or groups).

       By default, this command will refuse to proceed if the move would split between groups any
       instance  that  was  not previously split (a split instance is an instance with a mirrored
       disk template, e.g.  DRBD, that has the primary and  secondary  nodes  in  different  node
       groups). You can force the operation with --force.


       Modifies some parameters from the node group.

       The --node-parameters and --alloc-policy optiosn are documented in the add command above.

       remove {group}

       Deletes  the  indicated node group, which must be empty. There must always be at least one
       group, so the last group cannot be removed.

       list [--no-headers] [--separator=SEPARATOR] [-v]
       [-o [+]FIELD,...] [group...]

       Lists all existing node groups in the cluster.

       The --no-headers option will skip the initial header line.  The --separator  option  takes
       an  argument which denotes what will be used between the output fields. Both these options
       are to help scripting.

       The -v option activates verbose mode, which changes the display of  special  field  states
       (see ganeti(7)).

       The  -o  option  takes a comma-separated list of output fields. If the value of the option
       starts with the character +, the new fields will be added to the default list. This allows
       one  to  quickly  see  the  default  list plus a few other fields, instead of retyping the
       entire list of fields.

       The available fields and their meaning are:

       name   the group name

       uuid   the group's UUID

              the number of nodes in the node group

              the list of nodes that belong to this group

              the number of primary instances in the group (i.e., the number of primary instances
              nodes in this group have)

              the list of primary instances in the group

              the current allocation policy for the group

       ctime  the  creation  time  of the group; note that this field contains spaces and as such
              it's harder to parse

              if this attribute is not present (e.g. when upgrading from  older  versions),  then
              "N/A" will be shown instead

       mtime  the  last  modification time of the group; note that this field contains spaces and
              as such it's harder to parse

              the so called 'serial number' of the  group;  this  is  a  numeric  field  that  is
              incremented  each  time  the  node  is  modified,  and  it  can  be  used to detect

       If no group names are given, then all groups are  included.   Otherwise,  only  the  named
       groups will be listed.

       list-fields [field...]

       List available fields for node groups.

       rename {oldname} {newname}

       Renames a given group from oldname to newname.


       Report   bugs   to  project  website  (  or  contact  the
       developers using the Ganeti mailing list (


       Ganeti overview and specifications: ganeti(7) (general  overview),  ganeti-os-interface(7)
       (guest OS definitions).

       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-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).


       Copyright (C) 2006, 2007, 2008, 2009, 2010 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