The latest release of Ace (0.10.0) includes serving content over HTTP/2.

Instructions for getting started can be found in this guide.
An example app is available here.

Features available at this point are

• Stream isolation; one process per stream
• Bidirectional streaming; stream data too and from clients
• TLS(SSL) support via ALPN; data encrypted in transit
• Raxx interface; simplicitfy for request/response interactions

Also see the Roadmap for remaining features.

An adapter for plug and therefore phoenix is not something I am looking at yet. My preference is to shore up the foundations prior to a 1.0 release. However if anyone wanted to look at this I would be happy to offer some help getting through the codebase.

Any feedback would be great. At this point I am particularly looking for comments around the API.
At this point the project is very alpha. However I hope to stabilise it quickly.

I talked about Ace at Elixir.LDN, the videos is available now.

The talk covers

• The basics of HTTP/2
• Design decisions made by Ace, in particular how to make streaming easy
• Some chosen implementation details
• Next steps, including a plug adapter, GRPC implementation and GenStage integration

Ace 0.11.0 is now tested with h2spec.

In strict mode Ace passes 143/146 of the h2spec test suite.
The remaining issues are all around hpack and choices on handling compression errors

For the full list of changes see the changelog.