NAME

       ceph-mon - ceph monitor daemon

SYNOPSIS

       ceph-mon -i monid [ --mon-data mondatapath ]

DESCRIPTION

       ceph-mon  is  the cluster monitor daemon for the Ceph distributed file system. One or more
       instances of ceph-mon form a Paxos part-time parliament cluster  that  provides  extremely
       reliable and durable storage of cluster membership, configuration, and state.

       The  mondatapath  refers to a directory on a local file system storing monitor data. It is
       normally specified via the mon data option in the configuration file.

OPTIONS

       -f, --foreground
              Foreground: do not daemonize after startup (run in foreground). Do not  generate  a
              pid file. Useful when run via ceph-run(8).

       -d     Debug mode: like -f, but also send all log output to stderr.

       -c ceph.conf, --conf=ceph.conf
              Use  ceph.conf  configuration  file  instead  of the default /etc/ceph/ceph.conf to
              determine monitor addresses during startup.

       --mkfs Initialize the mon data directory with seed information to form  and  initial  ceph
              file  system  or  to join an existing monitor cluster.  Three pieces of information
              must be provided:

              • The cluster fsid.  This can come from a monmap (--monmap  <path>)  or  explicitly
                via --fsid <uuid>.

              • A  list  of  monitors and their addresses.  This list of monitors can come from a
                monmap (--monmap <path>), the mon host configuration value (in ceph.conf  or  via
                -m  host1,host2,...),  or  mon addr lines in ceph.conf.  If this monitor is to be
                part of the initial monitor quorum for a  new  Ceph  cluster,  then  it  must  be
                included in the initial list, matching either the name or address of a monitor in
                the list.  When matching by address, either the  public  addr  or  public  subnet
                options may be used.

              • The  monitor  secret key mon..  This must be included in the keyring provided via
                --keyring <path>.

       --keyring
              Specify a keyring for use with --mkfs.

AVAILABILITY

       ceph-mon 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), ceph-mds(8), ceph-osd(8)

COPYRIGHT

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