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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 article explains the principles and configuration of Keepalived, covering its role in providing high‑availability virtual IPs, the VRRP election process, traffic forwarding, load‑balancing algorithms, and practical configuration examples with vrrp_instance and vrrp_script directives.
This tutorial explains how to achieve high availability with keepalived by installing the software, configuring VRRP virtual IPs, setting up master and backup nodes, starting the service, and verifying failover through VIP testing on Linux systems.
This article explains how to use Keepalived together with PostgreSQL to build a two‑node high‑availability cluster, covering Keepalived's VRRP mechanism, host planning, installation steps, asynchronous master‑slave replication configuration, monitoring scripts, and detailed failover drills.
This guide explains how to achieve high availability for Nginx by installing and configuring Keepalived with VRRP, detailing preparation steps, configuration file examples, health‑check scripts, and failover testing on two Linux servers.
This guide explains how to troubleshoot firewalld command errors, enable VRRP multicast traffic, and fix VIP migration problems in a Keepalived high‑availability setup on CentOS 7, providing step‑by‑step commands, configuration file adjustments, and verification procedures.
This guide demonstrates how to achieve high availability for Nginx by deploying Keepalived in a virtual IP failover setup, covering installation via yum or source, configuration of keepalived and VRRP scripts, service management, and verification steps on two CentOS servers.
System health checks, akin to medical exams, are vital for modern IT infrastructure, using active and passive monitoring, failover strategies, and tools like Spring Boot Actuator to detect hardware, network, load, or software issues, prevent single points of failure, and ensure continuous high‑availability service operation.
This tutorial walks through preparing two servers, configuring Keepalived and Nginx on both master and backup nodes, restarting services, and testing failover to demonstrate a functional high‑availability architecture using VRRP virtual IPs.
This article explains how to install and configure Keepalived for high‑availability VRRP failover, set up master and backup configuration files, integrate with two Nginx load balancers, and test failover scenarios using scripts and command‑line tools.
This guide explains how to install Keepalived, configure VRRP‑based high‑availability for Nginx load balancers, modify master and backup configuration files, test failover scenarios, and add a Bash watchdog script to ensure seamless service continuity.
This article explains how to split a NAT server across two ISPs using zone or no‑reverse parameters, addresses source‑return path issues with redirect‑reverse or reverse‑route commands, and shows how adding VRRP resolves ARP conflicts and intermittent connectivity in dual‑firewall deployments.