Shedding old code with ecdysis: graceful restarts for Rust services at Cloudflare

What this post added

This post details the open-sourcing of 'ecdysis', a Rust library that implements graceful process restarts. It explains the challenges of zero-downtime upgrades for high-throughput network services, the limitations of naive approaches, and how ecdysis addresses these by using a fork-then-exec model with explicit socket inheritance. The post also covers security considerations and provides a code example for a TCP echo server using ecdysis with Tokio and systemd integration.