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support for http/1.1 -> http2 client upgrade for outbound connections #1502

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support for http/1.1 -> http2 client upgrade for outbound connections#1502
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enhancementFeature requests. Not bugs or questions.help wantedNeeds help!

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@akshaychitneni
akshaychitneni
opened on Aug 21, 2017

Envoy only supports http2 connections to the upstream hosts with prior knowledge. Any upgrade request from http1.1 to http2 from the client is not supported.

Can this be supported?

Thanks!

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  1. mattklein123
    added
    enhancementFeature requests. Not bugs or questions.
    on Aug 21, 2017

  2. mattklein123 commented on Aug 21, 2017

    @mattklein123
    mattklein123
    on Aug 21, 2017
    Member

    This can be supported. There are two ways that I can see this being implemented functionality-wise.

    1. Build functionality into the existing HTTP/2 connection pool that assumes that upgrade is required, but will always succeed. This is relatively simple to implement.

    2. Support a new connection pool which can operate in both HTTP/1 and HTTP/2 modes depending on upgrade. If this is required I would implement an entirely new connection pool implementation. This is a lot more work.

  3. mattklein123
    added
    help wantedNeeds help!
    on Oct 28, 2017

  4. mandarjog commented on May 17, 2018

    @mandarjog
    mandarjog
    on May 17, 2018
    Contributor

    /subscribe

  5. swift1911 commented on May 9, 2019

    @swift1911
    swift1911
    on May 9, 2019

    is any progress for this issue?

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