DRBD Reactor is a daemon consisting of a core that handles DRBD events processing, and plugins that can react on changes in a DRBD resource. A popular use for DRBD Reactor is as an alternative cluster resource manager (CRM) to create highly available resources by using its promoter plugin.
Helpful DRBD Reactor resources:
- DRBD Reactor chapter in the DRBD User’s Guide
- DRBD Reactor open source codebase on GitHub
- Manual pages related to the locally installed version of DRBD Reactor, its plugins, and related utilities:
man drbd-reactor<Tab> - Important release announcements about DRBD Reactor and other LINBIT software through the drbd-announce email list