How To Create a High-Availability Setup with Heartbeat and Reserved IPs on Ubuntu

**How To Create a High-Availability Setup with Heartbeat and Reserved IPs on Ubuntu**

Introduction Heartbeat is an open source program that provides cluster infrastructure capabilities—cluster membership and messaging—to client servers, which is a critical component in a high availability (HA) server infrastructure. Heartbeat is typically used in conjunction with a cluster resource manager (CRM), such as Pacemaker, to achieve a complete HA setup. However, in this tutorial, we will demonstrate how to create a 2-node HA server setup by simply using Heartbeat and a DigitalOcean Reserved IP. Compatibility: This tutorial was originally written for Ubuntu 14.04. The overall high-availability architecture remains valid on modern Ubuntu LTS releases, though networking configuration, package management, and service control may differ...

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