Template for RAID/VROC boot device
Synopsis¶
Add software RAID/md RAID for RHEL/Rocky Linux/Alma Linux, and VROC support for booting devices for RHEL/Rocky Linux/Alma Linux and SLES.
Solution¶
Confluent has a built-in feature to be able to load custom files in different parts of the booting process.
After editing the sample file, place it in /var/lib/confluent/public/os/<<profile name>>/scripts/pre.d.
For software RAID/md RAID instances please find below as a sample file may adapt for your needs:
Example file for software RAID/md RAID¶
DEVICES="/dev/sda /dev/sdb"
RAIDLEVEL=1
mdadm --detail /dev/md*|grep 'Version : 1.0' >& /dev/null && exit 0
lvm vgchange -a n
mdadm -S -s
NUMDEVS=$(for dev in $DEVICES; do
echo wipefs -a $dev
done|wc -l)
for dev in $DEVICES; do
wipefs -a $dev
done
# must use older metadata format to leave disks looking normal for uefi
mdadm -C /dev/md/raid $DEVICES -n $NUMDEVS -e 1.0 -l $RAIDLEVEL
# shut and restart array to prime things for anaconda
mdadm -S -s
mdadm --assemble --scan
readlink /dev/md/raid|sed -e 's/.*\///' > /tmp/installdisk
Reference https://github.com/lenovo/confluent/blob/master/misc/swraid
For VROC instances, please apply same principle as above (edit with needed info) :
Example file for VROC RAID:¶
DEVICES="/dev/sda /dev/sdb"
RAIDLEVEL=1
mdadm --detail /dev/md* | grep imsm >& /dev/null && exit 0
lvm vgchange -a n
mdadm -S -s
NUMDEVS=$(for dev in $DEVICES; do
echo wipefs -a $dev
done|wc -l)
for dev in $DEVICES; do
wipefs -a $dev
done
mdadm -C /dev/md/imsm0 $DEVICES -n $NUMDEVS -e imsm
mdadm -C /dev/md/md0_0 /dev/md/imsm0 -n $NUMDEVS -l $RAIDLEVEL
mdadm -S -s
mdadm --assemble --scan
Reference https://github.com/lenovo/confluent/blob/master/misc/vroc
Please remember to put the file for the corresponding system in **/var/lib/confluent/public/os/<