This feature is available in DRBD versions 8.3.2 and above.
A somewhat special use case for DRBD is the floating peers configuration. In floating peer setups, DRBD peers are not tied to specific named hosts (as in conventional configurations), but instead have the ability to float between several hosts. In such a configuration, DRBD identifies peers by IP address, rather than by host name.
For more information about managing floating peer configurations, see Section 8.6, “Configuring DRBD to replicate between two SAN-backed Pacemaker clusters”.