lumen VS bastion

There are details on this also: https://github.com/GetFirefly/firefly#runtime

Generally it should be assumed that actors and their concurrency model is fully supported as that is a part of the core semantics for BEAM languages.

I think this project used to be called Lumen until pretty recently - https://github.com/GetFirefly/firefly

Probably not a practical solution for what you are building now, but it's worth pointing out Lumen, an Erlang VM implementation that compiles to WebAssembly, and could one day enable Elixir on the frontend.

Another vector could be some tooling that makes it easy to run Go programs compiled to Wasm run inside of Wasmtime environment hosted in Rust. If we run the go tooling in the same system, one could point this tool at a Go repo and be running that Go in a matter of milliseconds. A fun feature would be running channels across separate Wasm envs. Or maybe use Lumen.

Wish the Elixir WASM project -- Lumen -- were active. It seems like nothing much is happening on it.

How is this better / different than https://github.com/bastion-rs/bastion ?

There are attempts to implement an Erlang/BEAM-inspired reactor/runtime/executor/ecosystem for Rust's Async, in particular Bastion. (There are also Lumen, Lunatic and Async-Backplane/Async-Supervisor.)

I would be interested in an example showing how to build a robust runtime like bastion with fault tolerance.

But the issue you're referring to, building a fault-tolerant web server where you can have granular control over killing background jobs regardless if they're blocked on a syscall, totally requires using this kind of software architecture. See Bastion.

Bastion, a Rust async runtime inspired by the beam distribution and supervision model

I don't really know much about erlang, but I think this may be along the lines of what you are thinking of: https://github.com/bastion-rs/bastion

(I also don't really think the linux kernel people would be interested...)

This reminds me of bastion. Looks like it attempts to fulfill the same needs, though I guess Lunatic has native WASM support whereas bastion might require some tweaking to have it work? Haven't worked with bastion, so that part of harder time with WASM is just a wild speculation. On the other hand bastion looks much more mature. Probably /u/vertexclique could give a more informed opinion about the difference between the two ;) I really like what these projects are putting forward.