Good news: so the %systemd_ordering macro works well for containers images to build it w/o systemd & deps pulled in, and the changes got accepted for RDO and some of the base packages for f29!
Bad news: [0] is a show stopper for removing systemd off the base RHEL/Fedora containers in Kolla. To mitigate that issue for the remaining dnf and puppet, and as well for the less important* to have it fixed iscsi-initiator-utils and kuryr-kubernetes-distgit, we need to consider using microdnf instead of dnf for installing RPM packages in Kolla. Or alternatively somehow to achieve a trick with _tmpfiles to be split off the main spec files into sub-packages [1]: if the tmpfiles and such were split out into a subpackage that'd be required if and only if the kernel was installed or being installed, that might work.
* it is only less important as those do not belong to the Kolla base/openstack-base images and impacts only its individual containers images.
[0] https://bugs.launchpad.net/tripleo/+bug/1804822/comments/17 [1] https://github.com/rpm-software-management/dnf/pull/1315#issuecomment-462326...
Here is an update. The %{systemd_ordering} macro is proposed for lightening containers images and removing the systemd dependency for containers. Please see & try patches in the topic [0] for RDO, and [1][2][3][4][5] for generic Fedora 29 rpms. I'd very appreciate if anyone building Kolla containers for f29/(rhel8 yet?) could try these out as well.
PS (somewhat internal facing but who cares): I wonder if we could see those changes catched up automagically for rhel8 repos as well?
I'm tracking systemd changes here [0],[1],[2], btw (if accepted, it should be working as of fedora28(or 29) I hope)
[0] https://review.rdoproject.org/r/#/q/topic:base-container-reduction [1] https://bugzilla.redhat.com/show_bug.cgi?id=1654659 [2] https://bugzilla.redhat.com/show_bug.cgi?id=1654672
[0] https://review.rdoproject.org/r/#/q/topic:base-container-reduction [1] https://bugzilla.redhat.com/show_bug.cgi?id=1654659 [2] https://bugzilla.redhat.com/show_bug.cgi?id=1654672 [3] https://bugzilla.redhat.com/show_bug.cgi?id=1668688 [4] https://bugzilla.redhat.com/show_bug.cgi?id=1668687 [5] https://bugzilla.redhat.com/show_bug.cgi?id=1668678