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:orphan:
==========================================================
monmaptool -- ceph monitor cluster map manipulation tool
==========================================================
.. program:: monmaptool
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
=======
.. option:: --print
will print a plaintext dump of the map, after any modifications are
made.
.. option:: --clobber
will allow monmaptool to overwrite mapfilename if changes are made.
.. option:: --create
will create a new monitor map with a new UUID (and with it, a new,
empty Ceph file system).
.. option:: --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,
#. ``--monmap filename`` to specify a monmap to load
#. ``--mon-host 'host1,ip2'`` to specify a list of hosts or ip addresses
#. ``[mon.foo]`` sections containing ``mon addr`` settings in the config
.. option:: --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.
.. option:: --add name ip:port
will add a monitor with the specified ip:port to the map.
.. option:: --rm name
will remove the monitor with the specified ip:port from the map.
.. option:: --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
========
:doc:`ceph <ceph>`\(8),
:doc:`crushtool <crushtool>`\(8),
|
