This little script checks the GRUB boot image for the VG\/LV\/file string pointing to the correct place, e.g. \/boot\/grub\/grub.cfg.<\/p>\n\n\n\n
This works on SUSE \/ SLES on POWER.
# SLES bootability monitor
#
# Henrik Morsing 1.0 24-FEB-2023 Initial
ver=1.0
[[ “${1}” == “DEBUG” ]] && DEBUG=1
unset ERR
# Find rootvg disks
rootlv=”$(mount | grep ‘ \/ ‘ | awk ‘{ print $1 }’)”
rootvg=$(mount | grep ‘ \/ ‘ | awk ‘{ print $1 }’ | awk -F- ‘{ print $1 }’ | awk -F\/ ‘{ print $NF }’)
disk=”$(\/usr\/sbin\/pvs | grep ${rootvg} | awk -F- ‘{ print $1 }’ | awk -F\/ ‘{ print $NF }’)”
PV=”$(\/usr\/sbin\/pvs | grep ${rootvg} | awk ‘{ print $1 }’)”
boot_LV=”$(\/usr\/sbin\/fdisk -l | grep PReP | grep mapper | awk ‘{ print $1 }’)”
# This checks the PVid and LVid in the boot LV
# points to the disk in the rootvg.
# It also checks the grub image pointed to exists.
\/usr\/local\/bin\/dd_wrapper ${boot_LV} 2>\/dev\/null | strings | grep lvmid | grep grub2 | awk -F \/ ‘{ print $2,$3 }’ | tr -d ‘)’ | while read vgid lvid
do
checkVG=”$(\/sbin\/vgdisplay -c | grep ${vgid} | awk -F: ‘{ print $1 }’ | tr -d ‘ ‘)”
if [[ “${checkVG}” == “${rootvg}” ]]
then
[[ ${DEBUG} ]] && printf “Boot image points to correct volume group\\t\\t\\033[1;32m[OK]\\033[0m\\n”
else
[[ ${DEBUG} ]] && printf “Boot image does NOT point to correct volume group\\t\\t\\033[1;31m[FAIL]\\033[0m\\n”
ERR=1
fi
# This is painfully annoying. lvdisplay command just lacks sensible output.
while read lv parm value
do
# If parm is “Path”, store value in case UUID matches what we are looking for.
if [[ “${parm}” == “Path” ]]
then
final_path=”$(ls -l ${value} | awk ‘{ print $NF }’)”
fi
if [[ “${parm}” == “UUID” ]]
then
if [[ “${value}” == “${lvid}” ]]
then
break
fi
fi
done < <(\/sbin\/lvdisplay | grep -E “LV Path|LV UUID”)
if [[ “${final_path}” == “$(ls -l ${rootlv} | awk ‘{ print $NF }’)” ]]
then
[[ ${DEBUG} ]] && printf “Boot image points to correct logical volume\\t\\t\\033[1;32m[OK]\\033[0m\\n”
else
[[ ${DEBUG} ]] && printf “Boot image does NOT point to correct logical volume\\t\\t\\033[1;31m[FAIL]\\033[0m\\n”
ERR=1
fi
done
# Last check, grub file
grub_file=”$(\/usr\/local\/bin\/dd_wrapper ${boot_LV} 2>\/dev\/null | strings | grep lvmid | grep grub2 | awk -F \/ ‘{ print “\/”$(NF-1)”\/”$NF”\/grub.cfg” }’)”
if [[ -s ${grub_file} ]]
then
[[ ${DEBUG} ]] && printf “grub.cfg exists in correct location\\t\\t\\t\\033[1;32m[OK]\\033[0m\\n”
else
[[ ${DEBUG} ]] && printf “grub.cfg does NOT exist in correct location\\t\\t\\033[1;31m[FAIL]\\033[0m\\n”
ERR=1
fi
[[ “${ERR}” == “” ]] && echo “Success” || echo “Fail”
exit 0
<\/p>\n","protected":false},"excerpt":{"rendered":"
This little script checks the GRUB boot image for the VG\/LV\/file string pointing to the correct place, e.g. \/boot\/grub\/grub.cfg. This works on SUSE \/ SLES on POWER. # SLES bootability monitor## Henrik Morsing 1.0 24-FEB-2023 Initial ver=1.0 [[ “${1}” == … Continue reading