High Availability Load Balancers with Maglev

What this post added

This post details the implementation of Maglev, a stateless connection scheduler, for Cloudflare's internal load balancing infrastructure. It addresses the challenges of achieving zero-downtime maintenance and preserving source IPs by leveraging consistent hashing, BGP for routing announcements, IPVS with Foo-Over-UDP encapsulation for packet forwarding, and a custom node agent for configuration. The post also discusses the complexities of MTU management and the use of iptables for access control.