Reliability: It’s not great

Almost half of the issues are caused by their use of HashiCorp products.

As someone that has started tons of Consul clusters, analyzed tons of Terraform states, developed providers and wrote a HCL parser, I must say this:

HashiCorp built a brand of consistent design & docs, security, strict configuration, distributed-algos-made-approachable... but at its core, it's a very fragile ecosystem. The only benefit of HashiCorp headaches is that you will quickly learn Golang while reading some obscure github.com/hashicorp/blah/blah/file.go :)

We are asking to HashiCorp products to do things they were not designed to do, in configurations that they don't expect to be deployed in. Take a step back, and the idea of a single global namespace bound up with Raft consistency for a fleet deployed in dozens of regions, providing near-real-time state propagation, is just not at all reasonable. Our state propagation needs are much closer to those of a routing protocol than a distributed key-value database.

I have only positive things to say about every HashiCorp product I've worked with since I got here.

I respect that. Can you elaborate a bit on the routing protocol thing? I assume you used WAN gossip?

I love the simplicity of fly.io & wish you all the best improving Fly's reliability!