NAME

       monmaptool - ceph monitor cluster map manipulation tool

SYNOPSIS

       monmaptool mapfilename [ --clobber ] [ --print ] [ --create ]
       [ --add ip:port ... ] [ --addv [protocol:ip:port*[,...*] ] ... ] [ --rm ip:port ... ]

DESCRIPTION

       monmaptool  is  a  utility  to  create,  view,  and modify a monitor cluster map for the Ceph distributed
       storage system. The monitor map specifies the only fixed addresses in the Ceph distributed  system.   All
       other daemons bind to arbitrary addresses and register themselves with the monitors.

       When  creating  a map with --create, a new monitor map with a new, random UUID will be created. It should
       be followed by one or more monitor addresses.

       The default Ceph monitor port is 6789.

OPTIONS

       --print
              will print a plaintext dump of the map, after any modifications are made.

       --clobber
              will allow monmaptool to overwrite mapfilename if changes are made.

       --create
              will create a new monitor map with a new UUID (and with it, a new, empty Ceph file system).

       --generate
              generate a new monmap based  on  the  values  on  the  command  line  or  specified  in  the  ceph
              configuration.  This is, in order of preference,

                 1. --monmap filename to specify a monmap to load

                 2. --mon-host 'host1,ip2' to specify a list of hosts or ip addresses

                 3. [mon.foo]  sections containing mon addr settings in the config. Note that this method is not
                    recommended and support will be removed in a future release.

       --filter-initial-members
              filter the initial monmap by applying the mon initial members setting.  Monitors  not  present  in
              that  list  will  be  removed, and initial members not present in the map will be added with dummy
              addresses.

       --add name ip:port
              will add a monitor with the specified ip:port to the map.

       --addv name [protocol:ip:port[,...]]
              will add a monitor with the specified version:ip:port to the map.

       --rm name
              will remove the monitor with the specified ip:port from the map.

       --fsid uuid
              will set the fsid to the given uuid.  If not specified  with  --create,  a  random  fsid  will  be
              generated.

EXAMPLE

       To create a new map with three monitors (for a fresh Ceph file system):

          monmaptool  --create  --add  mon.a 192.168.0.10:6789 --add mon.b 192.168.0.11:6789 \
            --add mon.c 192.168.0.12:6789 --clobber monmap

       To display the contents of the map:

          monmaptool --print monmap

       To replace one monitor:

          monmaptool --rm mon.a --add mon.a 192.168.0.9:6789 --clobber monmap

AVAILABILITY

       monmaptool  is  part of Ceph, a massively scalable, open-source, distributed storage system. Please refer
       to the Ceph documentation at http://ceph.com/docs for more information.

SEE ALSO

       ceph(8), crushtool(8),

COPYRIGHT

       2010-2024, Inktank Storage, Inc. and contributors. Licensed  under  Creative  Commons  Attribution  Share
       Alike 3.0 (CC-BY-SA-3.0)

dev                                               Jan 11, 2024                                     MONMAPTOOL(8)