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Merge pull request #19185 from dvdksn/25.0-releasenote-fixup 

engine: add normalized RLIMIT_NOFILE default to v25 release note
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Sebastiaan van Stijn 2024-01-23 18:20:00 +01:00 committed by GitHub
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@ -48,6 +48,27 @@ For a full list of pull requests and changes in this release, refer to the relev
### New
- The daemon now uses systemd's default `LimitNOFILE`. In earlier versions of
Docker Engine, this limit was set to `infinity`. This would cause issues with
recent versions of systemd, where the hard limit was increased, causing
programs that adjusted their behaviors based on ulimits to consume a high
amount of memory. [moby/moby#45534](https://github.com/moby/moby/pull/45534)
The new setting makes containers behave the same way as programs running on
the host, but may cause programs that make incorrect assumptions based on the
soft limit to misbehave. To get the previous behavior, you can set
`LimitNOFILE=1048576`.
This change currently only affects build containers created with `docker
build` when using BuildKit with the `docker` driver. Future versions of
containerd will also use this limit, which will cause this behavior to affect
all containers, not only build containers.
If you're experiencing issues with the higher ulimit in systemd v240 or later,
consider adding a system `drop-in` or `override` file to configure the ulimit
settings for your setup. The [Flatcar Container Linux documentation](https://www.flatcar.org/docs/latest/setup/systemd/drop-in-units/)
has a great article covering this topic in detail.
- Add OpenTelemetry tracing. [moby/moby#45652](https://github.com/moby/moby/pull/45652), [moby/moby#45579](https://github.com/moby/moby/pull/45579)
- Add support for CDI devices under Linux. [moby/moby#45134](https://github.com/moby/moby/pull/45134), [docker/cli#4510](https://github.com/docker/cli/pull/4510), [moby/moby#46004](https://github.com/moby/moby/pull/46004)
- Add an additional interval to be used by healthchecks during the container start period. [moby/moby#40894](https://github.com/moby/moby/pull/40894), [docker/cli#4405](https://github.com/docker/cli/pull/4405), [moby/moby#45965](https://github.com/moby/moby/pull/45965)