Linux High Availability clusters using Pacemaker and DRBD

Technical implementations for Linux high availability (HA) clusters focus on utilizing Pacemaker to manage active-active and active-passive configurations. These setups can be deployed on hypervisors such as VMware ESXi to ensure system reliability.

One specific application involves configuring highly available NFS exports using DRBD and Pacemaker within a three-node cluster. This configuration typically utilizes two diskful nodes for data replication and one diskless node to maintain DRBD quorum and prevent data divergence. Such solutions are compatible with enterprise distributions including Red Hat Enterprise Linux (RHEL) and Ubuntu LTS, providing centralized storage and file sharing capabilities for virtual machines, containers, and network-wide application access.