You may create the following script to solve the split-brain on DRBD
cat > /usr/local/bin/drbdsplit << EOF
#!/bin/bash
set -e
# Authors: Rodrigo Cuadra
# with Collaboration of Jose Miguel Rivera
# 2019/11/06
# Support: rcuadra@aplitel.com
#
drbdadm secondary drbd0
drbdadm disconnect drbd0
drbdadm -- --discard-my-data connect drbd0
ssh root@$ip_slave "drbdadm connect drbd0"
echo "Disk Status"
drbdadm status
EOF
chmod +x /usr/local/bin/drbdsplit
Where the variable “$ip_slave”, is the IP of the opposite server.
This script must be created on both servers.
To automatize this process, you can edit the file “/etc/drbd.conf”, and add the following on both servers:
resource resourcename {
[snip]
handlers {
split-brain "/usr/local/bin/drbdsplit";
}
[snip]
}
