The common architectural pattern of placing a load balancer in front of API servers creates a hidden single point of failure. When the load balancer itself fails, all backend servers become inaccessible, leading to service outages despite healthy infrastructure. To resolve this, organizations should implement Virtual Router Redundancy Protocol (VRRP), which allows multiple machines to share and dynamically transfer ownership of a virtual IP address, ensuring continuous availability without DNS changes or lengthy recovery periods. This requires understanding concepts like gratuitous ARP and potentially integrating tools like keepalived for Linux environments.
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