/usr/bin/ceph-rbdnamer is in librbd1 0.41-1ubuntu2.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 | #!/bin/sh
POOL=`cat /sys/devices/rbd/$1/pool`
IMAGE=`cat /sys/devices/rbd/$1/name`
SNAP=`cat /sys/devices/rbd/$1/current_snap`
if [ "$SNAP" = "-" ]; then
echo -n "$POOL $IMAGE"
else
echo -n "$POOL $IMAGE@$SNAP"
fi
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