ungleich-tools/ceph/find-osd-device.sh
2023-06-10 14:07:14 +02:00

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#!/bin/sh
# Locate which block device corresponds to the OSD
# Nico Schottelius, 2023-06-10
if [ $# -ne 1 ]; then
echo $0 osdnum
echo f.i. $0 99
exit 1
fi
osd_id=$1; shift
osd_path=/var/lib/ceph/osd/ceph-${osd_id}
if ! mount | grep -q " on ${osd_path} "; then
echo "Nothing mounted on ${osd_path}, are you on the right host?"
exit 1
fi
blockdev=$(readlink -f ${osd_path}/block)
# Is directly referring to sdX? print and exit
if echo $blockdev | grep -q ^/dev/sd; then
echo $blockdev
exit 0
fi
# try the non-recursive variant, resulting in finding pv/vg
blockdev=$(readlink ${osd_path}/block)
lvm_vg=$(echo $blockdev | awk -F/ '{ print $3 }')
pv_name=$(pvdisplay | grep -B1 $lvm_vg | awk '/PV Name/ { print $3 }')
if [ "$pv_name" ]; then
echo $pv_name
exit 0
fi
echo "Cannot determine block device for osd.${osdid}" >&2
exit 1