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Merge pull request #26354 from bluca/news

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NEWS: add future incompatible changes notice
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Luca Boccassi 2023-02-08 20:25:10 +00:00 committed by GitHub
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NEWS
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@ -2,6 +2,38 @@ systemd System and Service Manager
CHANGES WITH 253 in spe:
Announcements of Future Feature Removals and Incompatible Changes:
* We intend to remove cgroup v1 support from systemd release after the
end of 2023. If you run services that make explicit use of cgroup v1
features (i.e. the "legacy hierarchy" with separate hierarchies for
each controller), please implement compatibility with cgroup v2 (i.e.
the "unified hierarchy") sooner rather than later. Most of Linux
userspace has been ported over already.
* We intend to remove support for split-usr (/usr mounted separately
during boot) and unmerged-usr (parallel directories /bin and
/usr/bin, /lib and /usr/lib, etc). This will happen in the second
half of 2023, in the first release that falls into that time window.
For more details, see:
https://lists.freedesktop.org/archives/systemd-devel/2022-September/048352.html
* We intend to change behaviour w.r.t. units of the per-user service
manager and sandboxing options, so that they work without having to
manually enable PrivateUsers= as well, which is not required for
system units. To make this work, we will implicitly enable user
namespaces (PrivateUsers=yes) when a sandboxing option is enabled in a
user unit. The drawback is that system users will no longer be visible
(and appear as 'nobody') to the user unit when a sandboxing option is
enabled. By definition a sandboxed user unit should run with reduced
privileges, so impact should be small. This will remove a great source
of confusion that has been reported by users over the years, due to
how these options require an extra setting to be manually enabled when
used in the per-user service manager, as opposed as to the system
service manager. We plan to enable this change in the next release
later this year. For more details, see:
https://lists.freedesktop.org/archives/systemd-devel/2022-December/048682.html
Deprecations and incompatible changes:
* systemctl will now warn when invoked without /proc/ mounted