Listing 1. /etc/drbd.conf

# Each resource is a configuration section for a
# mirrored disk.
# The drbd0 is the name we will use to refer
# to this disk when starting or stopping it.

resource drbd0 {
  protocol C;
  handlers {
    pri-on-incon-degr "echo 'DRBD: primary requested but inconsistent!'
    ↪| wall; /etc/init.d/heartbeat stop"; #"halt -f";
    pri-lost-after-sb "echo 'DRBD: primary requested but lost!'
    ↪| wall; /etc/init.d/heartbeat stop"; #"halt -f";
  }

  startup {
    degr-wfc-timeout 120;    # 2 minutes.
  }

  disk {
    on-io-error   detach;
  }
# These are the network settings that worked best for me.
# If you want to play around with them, go
# ahead, but take a look in the man pages of drbd.conf
# and drbdadm to see what each does.

  net {
    timeout 120;
    connect-int 20;
    ping-int 20;
    max-buffers     2048;
    max-epoch-size  2048;
    ko-count 30;

# Remember to change this shared-secret on both the master
# and slave machines.

    cram-hmac-alg "sha1";
    shared-secret "FooFunFactory";
  }

  syncer {
    rate 10M;
    al-extents 257;
  }

# This next block defines the settings for the server
# labeled as server1. This label should be in your
# /etc/hosts file and point to a valid host.

  on server1 {

# The following device will be created automatically by
# the drbd kernel module when the DRBD
# partition is in master mode and ready to write.
# If you have more than one DRBD resource, name
# this device drbd1, drbd2 and so forth.

    device     /dev/drbd0

# Put the partition device name you've prepared here.

    disk             /dev/sda5;

# Now put the IP address of the primary server here.
# Note: you will need to use a unique port number for
# each resource.

    address   192.168.1.3:7788;
    meta-disk  internal;
  }

# This next block is identical to that of server1 but with
# the appropriate settings of the server called
# server2 in our /etc/hosts file.

  on server2 {
    device    /dev/drbd0;
    disk      /dev/sda5;
    address   192.168.1.2:7788;
    meta-disk internal;
  }
}