Corrosion is distributed service discovery based on Rust, SQLite, and CRDTs.

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Corrosion is an open-source distributed service discovery system built with Rust, SQLite, and CRDTs that uses gossip protocols instead of distributed consensus. Developed by Fly.io to solve global state synchronization across their platform, it propagates SQLite databases using SWIM-based gossip and cr-sqlite for conflict resolution. The article details major outages caused by the system, including a deadlock bug that locked up their entire proxy fleet, and describes their iterative improvements: watchdogs for event-loop stalls, extensive testing with Antithesis, eliminating partial updates, and regionalizing clusters to reduce blast radius.

Corrosion

<p>I don’t know all the details, and not even try to understand the way how <a href="http://fly.io" target="_blank" rel="noopener nofollow">fly.io</a> decided to implement it by spreading sqlite database around the network, but it looks to me like reinventing the wheel and solving problems already solved.
Why not to use some already working solution, with all these consensus solving problems, are already solved? For me it looks like brave solving of problems made by them.</p>
