On Thu, 27 Feb 2025 at 07:21, Andreas Tille <tille@debian.org> wrote:

I've just filed a RoQA request for cgroupfs-mount. If this gets removed
you should not Suggest this package any more. If you consider this
package important for docker.io please write this to bug #1099039 and
tag the bug 'moreinfo'.

It's important for sysvinit and users of sysvinit more than it's
important to Docker in particular (Docker just happens to be software
that uses/supports cgroupsv1 and needs *something* mounting cgroups in sysvinit, and cgroupsv2 + sysvinit is much more complicated, if it's
possible to use at all).

*Technically* users could "properly" mount a cgroupsv1 hierarchy
themselves via /etc/fstab, but it'd be pretty manual/annoying to do so
(because a "unified" single mount has a lot of rough edges, so you
have to effectively mimic what cgroupfs-mount does instead if you want
things to work properly).

All that being said, with platforms like GHA dropping support for
Ubuntu 20.04 [1], it's getting much harder to test cgroupsv1 in an
automated way on the popular platform where folks typically maintain
software like this, so I wouldn't be surprised if Docker drops support
for cgroupsv1 in the future (however, the version in Trixie definitely
won't, especially this close to freeze).

[1]: https://github.com/actions/runner-images/issues/11101

♥,
- Tianon
4096R / B42F 6819 007F 00F8 8E36 4FD4 036A 9C25 BF35 7DD4

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