Re: /opt [WAS: Re: New top-level dir]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



This is a bit of tangent, but if I am not mistaken, I can create RPMs to manage content of my home directory. How folks envision this would work in the context of this proposal? But I also wonder if this is something considered by e.g. systemd-homed.

I am asking this question, because move of the rpmdb into /usr is not conceptual (and I admit that even in the light of my question above, the /var is not really conceptual). So has anybody thought about more generic concept for rpmdb, which would cover the mountable directories?


Vít


Dne 12. 01. 22 v 10:05 Zbigniew Jędrzejewski-Szmek napsal(a):
On Mon, Jan 10, 2022 at 02:53:52PM -0700, Chris Murphy wrote:
Should /usr be independently portable? And is that with a version
matched /opt, or can there be mix and match revisions of /usr and
/opt?
We have three similar locations: /usr (system vendor tree),
/usr/local (admin non-packages installations), /opt (external vendor tree).
In other words, both /usr and /opt are for packages, but from different
sources. As an admin, you'd want to treat both package types the same,
and e.g. roll them back together. So having a separate tree for /opt
doesn't make much sense.

[At some point in the future] /opt should be renamed to /usr/opt and
symlinked for backwards compat.

If /usr is to be truly portable and have e.g. 'rpm query, verify,
remove, reinstall' work as expected, you need the metadata (the
database) representing its state to always come along for the ride.
Either the database is already in /usr, or you have to make sure /usr
and /state are inseparable.

If /usr and /state are inseparable, and if rpm can also describe
anything in /etc or /var or /opt, then all or part of those
directories are also inseparable from /state. And thus /usr. So I
think /state doesn't help.
Yeah, /state doesn't help with anything. It'd be just some part of the
whole system state, without a clear separation of why this particular
subset. My preference: /usr/lib/sysimage/rpm > /var/lib/rpm > /state.
To what degree do rpm and dnf intend to touch locations outside of
/usr *and care* about tracking those changes?
Traditionally, packages installed all kinds of files all over the place.
But we're slowly and painfully moving towards the model where:
1. packages are only allowed to install under /usr, /var, and /etc.
    (Or under /opt, but I'd want to move that to /usr/opt…)
2. packages must support /var/cache being wiped at any time, and
    most packages support anything under /var being wiped at any time.
3. systemd and other projects are trying to only use /etc for local
    admin state, and support "factory reset" by wiping /etc and /var.

So although rpm manages files under /var and /etc, it is not to the same
extent as /usr. In this light it makes a lot of sense to hold the
rpmdb state under /usr/ somewhere. The exact subdirectory doesn't really
matter, it's just a matter of convention, so obviously we want to follow
what opensuse and others are already using.

Zbyszek
_______________________________________________
devel mailing list -- devel@xxxxxxxxxxxxxxxxxxxxxxx
To unsubscribe send an email to devel-leave@xxxxxxxxxxxxxxxxxxxxxxx
Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/
List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines
List Archives: https://lists.fedoraproject.org/archives/list/devel@xxxxxxxxxxxxxxxxxxxxxxx
Do not reply to spam on the list, report it: https://pagure.io/fedora-infrastructure

Attachment: OpenPGP_signature
Description: OpenPGP digital signature

_______________________________________________
devel mailing list -- devel@xxxxxxxxxxxxxxxxxxxxxxx
To unsubscribe send an email to devel-leave@xxxxxxxxxxxxxxxxxxxxxxx
Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/
List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines
List Archives: https://lists.fedoraproject.org/archives/list/devel@xxxxxxxxxxxxxxxxxxxxxxx
Do not reply to spam on the list, report it: https://pagure.io/fedora-infrastructure

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Index of Archives]     [Fedora Announce]     [Fedora Users]     [Fedora Kernel]     [Fedora Testing]     [Fedora Formulas]     [Fedora PHP Devel]     [Kernel Development]     [Fedora Legacy]     [Fedora Maintainers]     [Fedora Desktop]     [PAM]     [Red Hat Development]     [Gimp]     [Yosemite News]

  Powered by Linux