[ceph-users] ceph-volume deactivate errs out with "findmnt: invalid option -- M"

Hi all, I'm experimenting with ceph-volume on Centos7, ceph mimic 13.2.10. When I execute "ceph-volume deactivate ..." on a previousy activated OSD, I get this error: # ceph-volume lvm deactivate 12 0bbf481c-6a3d-4724-9a27-3a845eb05911 stderr: /usr/bin/findmnt: invalid option -- 'M' stderr: Usage: Help summary of findmnt at the bottom. I could hack a script together that forwards this call to findmnt and translates the option. Can anyone tell me if this is a bug or if I'm running with the wrong version? In the mean time, is ceph-volume deactivate just unmounting /var/lib/ceph/osd/ceph-ID directories, or is there more to it (no dmcrypt in use)? Thanks! # findmnt --help Usage: findmnt [options] findmnt [options] <device> | <mountpoint> findmnt [options] <device> <mountpoint> findmnt [options] [--source <device>] [--target <mountpoint>] Options: -s, --fstab search in static table of filesystems -m, --mtab search in table of mounted filesystems -k, --kernel search in kernel table of mounted filesystems (default) -p, --poll[=<list>] monitor changes in table of mounted filesystems -w, --timeout <num> upper limit in milliseconds that --poll will block -A, --all disable all built-in filters, print all filesystems -a, --ascii use ASCII chars for tree formatting -c, --canonicalize canonicalize printed paths -D, --df imitate the output of df(1) -d, --direction <word> direction of search, 'forward' or 'backward' -e, --evaluate convert tags (LABEL,UUID,PARTUUID,PARTLABEL) to device names -F, --tab-file <path> alternative file for --fstab, --mtab or --kernel options -f, --first-only print the first found filesystem only -i, --invert invert the sense of matching -l, --list use list format output -N, --task <tid> use alternative namespace (/proc/<tid>/mountinfo file) -n, --noheadings don't print column headings -u, --notruncate don't truncate text in columns -O, --options <list> limit the set of filesystems by mount options -o, --output <list> the output columns to be shown -P, --pairs use key="value" output format -r, --raw use raw output format -t, --types <list> limit the set of filesystems by FS types -v, --nofsroot don't print [/dir] for bind or btrfs mounts -R, --submounts print all submounts for the matching filesystems -S, --source <string> the device to mount (by name, maj:min, LABEL=, UUID=, PARTUUID=, PARTLABEL=) -T, --target <string> the mountpoint to use -h, --help display this help and exit -V, --version output version information and exit Available columns: SOURCE source device TARGET mountpoint FSTYPE filesystem type OPTIONS all mount options VFS-OPTIONS VFS specific mount options FS-OPTIONS FS specific mount options LABEL filesystem label UUID filesystem UUID PARTLABEL partition label PARTUUID partition UUID MAJ:MIN major:minor device number ACTION action detected by --poll OLD-TARGET old mountpoint saved by --poll OLD-OPTIONS old mount options saved by --poll SIZE filesystem size AVAIL filesystem size available USED filesystem size used USE% filesystem use percentage FSROOT filesystem root TID task ID ID mount ID OPT-FIELDS optional mount fields PROPAGATION VFS propagation flags FREQ dump(8) frequency in days [fstab only] PASSNO pass number on parallel fsck(8) [fstab only] For more details see findmnt(8). ================= Frank Schilder AIT Risø Campus Bygning 109, rum S14