This tutorial walks through building a PostgreSQL high‑availability cluster using Pacemaker and Corosync, covering architecture overview, component installation, cluster status checks, data synchronization verification, failover handling, and common maintenance commands with concrete commands and screenshots.
This article explains the principles of high‑availability clusters, details Corosync and Pacemaker architecture, provides installation and configuration steps, and demonstrates a practical HA setup using Corosync, Pacemaker, and NFS to ensure continuous service during node failures.
This article explains the concepts, architecture, resource management, installation steps, and a practical NFS high‑availability example for building a Corosync‑Pacemaker HA cluster on Linux, covering constraints, split‑brain handling, and monitoring.
This article details a MySQL high‑availability solution built on Pacemaker, Corosync and MHA, explains why earlier keepalived‑based designs suffered split‑brain issues, and walks through the architecture, quorum handling, resource agents, failover workflow, testing methodology, and practical lessons learned.
This article walks through configuring a MySQL high‑availability cluster using Pacemaker and Corosync, covering topology, environment setup, host preparation, NFS sharing, MySQL installation, HA resource definition, testing, and final considerations, all with detailed commands and screenshots.
This guide walks through setting up a highly available two‑node Nginx service on CentOS 7 using Corosync and Pacemaker, covering topology, environment preparation, host synchronization, HA component installation, NFS sharing, resource configuration with crmsh, and testing the failover behavior.
This step‑by‑step guide shows how to configure a three‑node MariaDB HA cluster on CentOS using NFS shared storage, corosync multicast heartbeat, pacemaker resource management, and a virtual IP, including installation, configuration files, and failover testing.
This article explains what split‑brain is in high‑availability systems, compares arbitration and fencing methods, evaluates client‑routing options without fencing devices, discusses data‑loss risks during failover for PostgreSQL and MySQL, and provides concrete implementation guidance using Pacemaker and Corosync.
Learn how to set up a fault‑tolerant MySQL environment by installing and configuring Corosync, Pacemaker, DRBD, and related resources across two servers, covering prerequisites, network sync, storage setup, resource definitions, and verification steps to achieve a fully operational HA cluster.
