envoyproxy/envoy

alt-svc for Envoy

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#15,953 opened on Apr 13, 2021

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area/quichelp wanted

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Description

We can do basic alt-svc for Envoy using the route response_headers_to_add but it'd be nice to be able to do alt-svc on a per listener basis rather than a route at a time, and to allow pooling across domains (alt-authority)

Given this is pretty core to using QUIC, I think it's worth putting directly in the HCM

Contributor guide

Research direction
Understand the current alt svc support via route response headers to add. Investigate how to add per listener alt svc configuration in the HCM (HttpConnectionManager). Look at existing HCM configuration options and how they affect listeners. Consider how to handle alt authority for pooling across domains. Research Envoy's extension points for adding new config fields.
Tech stack
cpp
Domain
backendinfrastructure
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
4
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Mostly clear
Prerequisites
C++Envoy internalsHTTP/QUIC
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
20