drbdadm up all #drbdadm up r1
storage1
drbdadm primary r1 drbdadm primary r3
storage2
drbdadm primary r2 drbdadm primary r1
storage3
drbdadm primary r3 drbdadm primary r2
lsmod | egrep 'drbd|lru_cache' cat /proc/drbd # module version drbdadm | grep -A1 ^Version # tools version #drbd-overview #drbdsetup status drbdadm status #drbdadm status r1 /etc/init.d/drbd status
both nodes
drbdadm down all #drbdadm down r1
do some change and populate
vi /etc/drbd.conf scp /etc/drbd.conf storage2:/etc/ scp /etc/drbd.conf storage3:/etc/
APPLY ON EVERY NODE
drbdadm adjust-with-progress r1 --dry-run drbdadm adjust-with-progress r2 --dry-run drbdsetup disk-options 1 --set-defaults --read-balancing=least-pending drbdsetup disk-options 2 --set-defaults --read-balancing=least-pending drbdsetup all show
and show resource configuration
drbdsetup all show drbdsetup r1 show
lvcreate -V100G --thin vdisks/thinpool -n sabotage-data
vi /etc/drbd.conf
scp /etc/drbd.conf pro5s2:/etc/drbd.conf
ll /dev/sda3
ll /dev/vdisks/sabotage-data
drbdadm create-md res-data
drbdadm create-md res-sabotage-data
dd if=/dev/zero of=/dev/sda3 bs=1M count=1
dd if=/dev/zero of=/dev/vdisks/sabotage-data bs=1M count=1
drbdadm adjust res-data
drbdadm adjust res-sabotage-data
drbdadm primary --force res-data
drbdadm primary --force res-sabotage-data
drbdadm status
output something only if there is a problem to report
mkdir -p /root/bin/ vi /root/bin/check.drbd.ksh #!/bin/ksh tmp=`/usr/local/sbin/drbdadm status | grep '^ disk:' | grep -v '^ disk:UpToDate$'` [[ -n $tmp ]] && /usr/sbin/drbdadm status unset tmp chmod +x /root/bin/check.drbd.ksh
test
/root/bin/check.drbd.ksh
and enable
crontab -e */5 * * * * /root/bin/check.drbd.ksh
…assuming you got /etc/aliases defined alright
drbdadm - Utility for DRBD administration https://docs.linbit.com/man/v9/drbdadm-8/
drbd.conf - DRBD Configuration Files https://docs.linbit.com/man/v9/drbd-conf-5/