: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 `\(8), :doc:`crushtool `\(8),