Keepalived — VRRP failover, high availability, health checks, and load balancer redundancy.
Split-brain in Keepalived means both nodes think they own the VIP. Traffic gets blackholed or split unpredictably. Here's how to diagnose and fix it fast....
Write Keepalived track_script health checks that trigger VIP failover based on application health, not just node availability.
Set up a highly available load balancer pair using Keepalived VRRP with a shared virtual IP that automatically fails over between two nodes.
Implement automatic failover for HAProxy and Nginx using Keepalived with VRRP — virtual IPs, health checks, and split-brain prevention.