NAME

       monmaptool - ceph monitor cluster map manipulation tool

SYNOPSIS

       monmaptool mapfilename [ --clobber ] [ --print ] [ --create ]
       [ --add 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

       --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.

       --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 the Ceph distributed storage  system.   Please  refer  to  the  Ceph
       documentation at http://ceph.com/docs for more information.

SEE ALSO

       ceph(8), crushtool(8),

COPYRIGHT

       2010-2014, Inktank Storage, Inc. and contributors. Licensed under Creative Commons BY-SA