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Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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Cool nginx playground by b0rk (Julia Evans)

Posted by jpluimers on 2024/08/28

This is a really cool interactive [Wayback/Archive] nginx playground!

It starts with a default nginx configuration which you can edit and spins up a docker container for each run showing the results of that configuration.

How cool is that to learn how nginx works (:

This is how I found out about it:

  1. [Wayback/Archive] ShanerBaner on Twitter: “After reading jvns.ca/blog/2022/06/28/some-notes-on-bubblewrap I wondered: “Why does it take 400ms to run ls in docker?” I don’t know the answer yet, but I’ve found a few clues in dockerd/containerd/runc. Depending on your config you can get anywhere from 40ms->400ms.”

    1. [Wayback/Archive] ShanerBaner on Twitter: “runc, when using the config.json used by docker, initially took about 80ms. Removing epbf for seccomp filtering saved 20ms. Another 20ms were saved by stripping down the mounts/namespaces/ptys.”
    2. [Wayback/Archive] ShanerBaner on Twitter: “I got stuck at 40ms because `perf` can’t seem to find all of the debugging symbols for my runc binary. But even that single runc invocation involves runc forking itself a couple times.”
    3. [Wayback/Archive] Aleksa Sarai 暗号伯爵 on Twitter: “@shanemhansen The forking happens because of restrictions placed on us by the Go runtime (Go does not have a bare “fork” primitive and you cannot disable multi-threadedness from within a Go program — creating a container usually only takes one or two forks but we need three and an exec).”
    4. [Wayback/Archive] Aleksa Sarai 暗号伯爵 on Twitter: “@shanemhansen We need the exec so we can run the embedded C code we have which executes all of the stuff that we cannot do from within Go. Personally I think the fact we need to do this at all discounts the argument that Go is a “systems programming language”.”
  2. [Wayback/Archive] Notes on running containers with bubblewrap
  3. [Wayback/Archive] New tool: an nginx playground (which is not dated, but I think it went life in fall 2021)

–jeroen

This entry was posted on 2024/08/28 at 12:00 and is filed under *nix, *nix-tools, Conference Topics, Conferences, Development, Event, nginx, Power User, Software Development, Web Development. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

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