Failover Archives

MySQL Replication with GTID: Master-Slave Setup and Safe Production Failover

October 18, 2026

Discover how switching to GTID-based MySQL replication eliminates fragile binary log coordinates during production incidents. Follow this real-world guide to configure master-slave clusters and execute zero-data-loss failover safely.

Linux

High Availability with Keepalived on Linux: Virtual IP and Automated Failover

October 10, 2026

When your primary web node crashes at 2 AM, every second of downtime counts. Here is how to configure Keepalived on Linux with a floating Virtual IP and automated health checks for sub-two-second, seamless failover.

Networking

4G/5G USB Modem Failover on Ubuntu Server with ModemManager and NetworkManager

July 17, 2026

After three fiber outages in six months, I configured automatic 4G/5G USB modem failover on Ubuntu Server using ModemManager and NetworkManager. Six months later, it's handled seven more disruptions without a single manual action — here's the exact setup I'm still running in production.

Networking

Ubuntu Dual WAN Load Balancing and Failover with IPRoute2 and Netplan

May 21, 2026

Learn how to configure Dual WAN Load Balancing and Failover on Ubuntu Server using IPRoute2 and Netplan. This guide covers policy-based routing and automated health checks for high-availability networking.

Networking

DIY SD-WAN: How We Used pfSense to Kill Downtime in Our Small Office

April 23, 2026

Tired of internet outages? Learn how to combine two ISP connections into one rock-solid network using pfSense, load balancing, and smart failover tactics.

Networking

Keepalived & VRRP: Build a Floating IP for High Availability on Linux

April 9, 2026

Keepalived implements VRRP on Linux to give your servers a shared floating IP address. When the primary node fails, the standby automatically claims the VIP in seconds. This step-by-step guide covers installation, configuration, health check scripts, and failover testing on Ubuntu/Debian.

Linux

Network Bonding and Teaming on Linux: Boost Speed and Ensure Redundancy

March 28, 2026

After six months of continuous operation, I'm sharing my experience with network bonding and teaming on Linux. Learn how to combine multiple network cards to boost speed, ensure failover redundancy, and significantly improve network performance on your servers.