Is this ready for use with Envoy?

[antweiss]

I tried to use the WASM filters built from project examples in WASM-enabled Envoy but got: "WASM missing malloc/free"
Is this ready to play with? Should the examples work? Do they require a special Envoy build?

[antweiss]

@PiotrSikora I'd love to get an answer to this. Thanks a bunch in advance!

[charypar]

@antweiss I hit the same issue with missing malloc/free. Are you using wasme deploy envoy to test locally by any chance?

If so, I think the default envoy docker image it uses (quay.io/solo-io/gloo-envoy-wasm-wrapper:1.3.5) uses an outdated ABI not supported by this SDK (at least I think that's what's happening).

It works fine with Istio's version of Envoy, like so:

wasme deploy envoy <image-name> --envoy-image=istio/proxyv2:1.5.1

I initially got around the malloc/free problem by exporting a stub free function, but then it failed calling proxy_on_configure anyway, saying it's unreachable.

[antweiss]

@charypar Thanks a lot for this! Yes - the malloc/free issue comes from Gloo version of Envoy. I also tried with a self-built Wasm-enabled Envoy binary - and got Failed to load WASM module due to a missing import: env.proxy_get_configuration
So I suppose this does require Istio-provided Envoy. Will try this now.

[antweiss]

@charypar you were right - works like charm :) thanks again!

[antweiss]

Described my experience writing a filter using Rust sdk here: https://antweiss.com/blog/extending-envoy-with-wasm-and-rust/
Thanks @PiotrSikora and @charypar

[charypar]

Fun, I did the same thing here @antweiss: https://blog.red-badger.com/extending-istio-with-rust-and-webassembly, just took me longer to get it published 😄

[Gsantomaggio]

same problem here, I solved by using proxyv2:1.5.1 I could not make it running on Mac OS btw. With Ubuntu it works.

[Gsantomaggio]

Envoy 1.7 is out!!! and it supports wasm.
I don't have this problem anymore I think we can close the issue @PiotrSikora

[PiotrSikora]

Thanks, I'm glad that everything works for you!

I'll keep the bug open as a reminder to put a list of compatible host environments in the documentation that I'm working on.

[playground]

Is there any typescript examples?