Ceph MON (CLI)

Ceph MON as static binary built
intend to use QNAP NAS Storage as a quorum/witness, generally required when a Ceph scaled-out cluster setup is running nodes in different locations

due to complexity, this is for advanced users.

ceph-mon command line is in $PATH

[~] # ceph-mon --help
usage: ceph-mon -i [flags]
--debug_mon n
debug monitor level (e.g. 10)
--mkfs
build fresh monitor fs
--force-sync
force a sync from another mon by wiping local data (BE CAREFUL)
--yes-i-really-mean-it
mandatory safeguard for --force-sync
--compact
compact the monitor store
--osdmap
only used when --mkfs is provided: load the osdmap from
--inject-monmap
write the monmap to the local monitor store and exit
--extract-monmap
extract the monmap from the local monitor store and exit
--mon-data
where the mon store and keyring are located
--set-crush-location = sets monitor's crush bucket location (only for stretch mode)
--conf/-c FILE read configuration from the given configuration file
--id/-i ID set ID portion of my name
--name/-n TYPE.ID set name
--cluster NAME set cluster name (default: ceph)
--setuser USER set uid to user or uid (and gid to user's gid)
--setgroup GROUP set gid to group or gid
--version show version and quit

--debug_ms N set message debug level (e.g. 1)


Last update: 27 June 2026