This article explains the Nginx master‑slave high‑availability architecture, describing the roles of master and slave nodes, the use of Keepalived for VIP failover via heartbeat detection, and provides configuration diagrams and code snippets to illustrate seamless traffic switching.
This guide demonstrates how to configure keepalived in a dual‑host (master‑master) setup, enabling VIP address migration between two servers by defining two VRRP instances that act as primary and backup for each other, and includes step‑by‑step commands, configuration files, verification procedures, and multicast traffic capture.
This guide explains two high‑availability patterns—VIP failover triggered by database outage and by HAProxy status—using dual‑master MySQL, Keepalived, and HAProxy, with step‑by‑step configuration, scripts, and testing procedures to ensure seamless service continuity.
This guide walks through installing and configuring Keepalived on two CentOS servers to provide automatic Nginx health checking, virtual IP failover, and high‑availability load balancing, including scripts, service commands, and advanced iptables techniques to avoid packet loss during maintenance.
