CentOS Hyperscale SIG Quarterly Report for 2023Q4

Monday, 29, January 2024 Davide Cavalca SIG No Comments

This report covers work that happened between September 1st 2023 and January 26th 2024. For previous work, see the 2023Q2 report.


The Hyperscale SIG focuses on enabling CentOS Stream deployment on large-scale infrastructures and facilitating collaboration on packages and tooling.

Membership update

Since the last update, the SIG gained one new member (Matteo Croce).

We welcome anybody that’s interested and willing to do work within the scope of the SIG to join and contribute. See the membership page in our user documentation for the current members list and how to join.

Releases and Packages

Unless otherwise specified, packages are available in our main repository, which can be enabled with dnf install centos-hyperscale-release. Please report any issues with these packages on our package-bugs tracker.


We have continued streamlining our user documentation website and keeping its content up to date.

As previously mentioned, we would very much welcome any feedback and contributions you might have for this documentation.


The latest version in the Hyperscale SIG is systemd 253.7 for both CentOS Stream 8 and CentOS Stream 9. This will be the last major release of systemd we plan to tag for CentOS Stream 8.

Some improvements were made to the mkosi config for testing the Hyperscale systemd backport in preparation for the coming presentation about this work at CentOS Connect. We’re also preparing to start the release of systemd 254.


The latest version in the Hyperscale SIG is kernel 6.7.1-0.hs1 for CentOS Stream 9. This new kernel is now based on upstream Fedora release kernel rather than the CentOS/RHEL kernel tree. For the foreseeable future, the Hyperscale SIG will be tracking Fedora kernels to build and release into CentOS. The kernel is still built with a RHEL-like configuration, modulo changes for CentOS Hyperscale specifically.

As the EOL draws close, kernels for CentOS Stream 8 have been discontinued and no further efforts around CentOS Stream 8 are planned.

Spin images

New experimental GNOME and KDE workstation live media images for CentOS Stream Hyperscale 9 are now available on the mirrors. These new images are built using kiwi in the CentOS Community Build Service (CBS) in collaboration with the CentOS Alternative Images SIG.

More information on our images can be found on our site.

Cloud images are blocked until updated Koji nodes for image builds are deployed.

Package updates

For CentOS Stream 9:

For CentOS Stream 8:

DNF/RPM stack with CoW support

The Copy-on-Write stack was rebuilt on top of the latest packaging changes in upstream CentOS.

We’re still in the process of reworking the CoW patchset to address the latest upstream feedback; once the discussion has settled we will publish an updated version.

Health and Activity

The SIG continues to maintain a healthy development pace.


The SIG holds regular bi-weekly meetings on Wednesdays at 16:00 UTC. Meetings are logged and the minutes for past meetings are available.

The SIG uses the #centos-hyperscale:fedoraproject.org Matrix room for ad-hoc communication and work coordination; this room used to be bridged to the #centos-hyperscale IRC channel, but the bridge is currently inoperative. For async discussions and announcements we generally use the centos-devel mailing list. The SIG also holds open monthly video conference sessions to promote collaboration and social interaction.

Conference talks

During the last quarter members of the CentOS Hyperscale SIG attended several conferences where they were able to share the work the SIG is doing and meet up in person. Among others, we had a presence at All Systems Go, LinuxFest Northwest and Linux Plumbers Conference.

We have a page tracking conference presentations around Hyperscale-related topics. You can find references there to all of our previous talks, including video recordings where available.

Next month we’ll be presenting an update on SIG activities at CentOS Connect at FOSDEM, where we will also hold a meetup (see below); several members of the SIG will also be attending FOSDEM itself. Later in the year we expect to have a presence at SCALE 21x, Texas Linux Fest, LinuxFest Northwest and Red Hat Summit, plus other events down the road. If you’d like to meet us in person at a future event please reach out.

Face-to-face meetup

The SIG will hold an in-person meetup in Brussels, Belgium on February 1st as part of CentOS Connect at FOSDEM. A number of SIG members will be present in person, and we will have a conference bridge setup for remote participants as well. Everyone is welcome to attend, see the Connect schedule for details and to register to the event.

Live streams

The SIG periodically does work live on Twitch from its official Twitch channel. Interested parties who want to watch and interact with us as we do work should follow us on Twitch to get notified for when we stream.

Planned work

The SIG tracks pending work as issues on our Pagure repository. Notable projects currently in flight include:

Issues for the Board

We have no issues to bring to the board’s attention at this time.

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