[find-osd-device] fix initial script issues

ceph/find-osd-device.sh

@@ -9,18 +9,16 @@ if [ $# -ne 1 ]; then
     exit 1
 fi
 
-osdid=$1; shift
+osd_id=$1; shift
 
-osd_path=/var/lib/ceph/osd/ceph-${osdid}
+osd_path=/var/lib/ceph/osd/ceph-${osd_id}
 
-mountpath=$(mount | grep "on ${osd_path} ")
-
-if [ -z "${mountpath}" ]; then
+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 ${mountpath}/block)
+blockdev=$(readlink -f ${osd_path}/block)
 
 # Is directly referring to sdX? print and exit
 if echo $blockdev | grep -q ^/dev/sd; then
@@ -29,7 +27,7 @@ if echo $blockdev | grep -q ^/dev/sd; then
 fi
 
 # try the non-recursive variant, resulting in finding pv/vg
-blockdev=$(readlink ${mountpath}/block)
+blockdev=$(readlink ${osd_path}/block)
 lvm_vg=$(echo $blockdev | awk -F/ '{ print $3 }')
 
 pv_name=$(pvdisplay | grep -B1 $lvm_vg | awk '/PV Name/ { print $3 }')