[systemd-devel] mkosi: rpm using host machine's users/groups

[Colin Guthrie]

Hi,

So I didn't appreciate this before, but it seems a long standing RPM 
issue where, when using --root the packages will be installed with the 
uid/gid mappings from the host machine rather than the passwd/group 
files from the root.

This makes for a problem using mkosi as it doesn't make the builds 
repeatable and very much dependant on the host machine.

For now, I've added the following to my mkosi.postinst:

   rpm -qa | xargs rpm --setugids >/dev/null 2>&1

(for an RPM based target distro this is fine, but obviously others will 
presumably have similar commands).

This, however, isn't cheap. It takes ~1 minute on a small package list 
on my semi-recent SSD laptop. That's pretty much the same time it takes 
to install the packages in the first place.

So my question is, is there a better work around for this?

Upstream RPM issue:
https://github.com/rpm-software-management/rpm/issues/882

While I don't think it helps, the user namespaces may be a useful work 
around (e.g. semi related to 
https://github.com/systemd/mkosi/issues/716) but I think the real fix is 
likely in glibc/rpm.

Col

-- 

Colin Guthrie
gmane(at)colin.guthr.ie
http://colin.guthr.ie/

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