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caddyserver / caddy-docker

Source for the official Caddy v2 Docker Image
https://hub.docker.com/_/caddy
Apache License 2.0
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Increase UDP buffer size #269

Closed natachasouza closed 1 year ago

natachasouza commented 1 year ago

When running caddy in a docker container, we get this message in the logs:

{"level":"info","ts":1668215276.045424,"msg":"failed to sufficiently increase receive buffer size (was: 208 kiB, wanted: 2048 kiB, got: 416 kiB). See https://github.com/lucas-clemente/quic-go/wiki/UDP-Receive-Buffer-Size for details."}

Searching in the Caddy community, there are only instructions on how to increase the buffer size on the operating system: https://caddy.community/t/udp-receive-buffer-size-quic/11244

Can the base docker image for caddy have this buffer size increased?

Please let me know if you need additional info!

francislavoie commented 1 year ago

I'm pretty sure you need to do that on the host machine, not in the container.

vbertr01-hub commented 1 year ago

I have also the same message but we are using a fargate ecs container so we can not increase this buffer size. Will this give problems or is there a workaround?

mholt commented 1 year ago

It just means your HTTP/3 performance is suboptimal. It would be ideal if your environment increased the buffer size (or allowed you to do so).

francislavoie commented 1 year ago

Try reaching out to Amazon support for help with that.

natachasouza commented 1 year ago

Thank you @francislavoie and @mholt for the explanations.