DRBD


# cat /etc/drbd.d/global_common.conf
global {
usage-count yes;
}

common {
startup {
degr-wfc-timeout 0;
}

net {
cram-hmac-alg sha1;
shared-secret ****************;
}

disk {
on-io-error detach;
}
}

# cat /etc/drbd.d/r0.res
resource r0 {
on scld.sedo.de.intern {
volume 0 {
device /dev/drbd0;
disk /dev/vg0/lvol0;
flexible-meta-disk internal;
}
address 192.168.255.1:7788;
}
on ubuntu {
volume 0 {
device /dev/drbd0;
disk /dev/sda3;
flexible-meta-disk internal;
}
address 192.168.255.2:7788;
}
}

drbdadm disk-options --c-plan-ahead=0 --resync-rate=900M --c-fill-target=0 r0

# status
drbd-overview

# get resources
cat /etc/drbd.d/db.res | grep resource | cut -d" " -f2

# resolve split brain
# on slave (split brain victim)
drbdadm secondary db1
drbdadm connect --discard-my-data db
https://docs.linbit.com/doc/users-guide-84/s-resolve-split-brain/

# https://wiki.ubuntuusers.de/DRBD/