Agenda for the Flatcar Office Hours on Wednesday, 9th of October 2024, 2:30pm UTC

[t-lo]

In the office hours we discuss news and happenings in and around Flatcar, provide a space for our user community to discuss with maintainers, and do our release planning.

• Jitsi: https://meet.flatcar.org/OfficeHours
• Youtube live stream / recording: https://www.youtube.com/live/NK-5pUaMaZs
  • All recordings: https://www.youtube.com/@FlatcarLinux/live
• Community Calls calendar (all future calls): Google Calendar
  • iCal version: ical

Welcome

• Brief intro/check-in of the new participants joining the call. Please introduce yourself and share what brings you here today.

Agenda items

• @ader1990 systemd-256 upgrade and cgroups-v1 deprecation (Upgrade systemd from 255 to 256 scripts#2145)
• @t-lo will demo ClusterAPI in-place kubernetes updates (https://github.com/flatcar/flatcar-demos/tree/main/CAPO-sysext)

Docker 26 is now in Beta (4054.1.0), please test!

A number of legacy features have been removed by upstream.

Removed features:

• Devicemapper storage driver
• Pushing and pulling with image manifest v2 schema 1
• OOM-score adjust for the daemon
• logentries logging driver
• IsAutomated field, and "is-automated" filter on docker search
• Container short ID in network Aliases field
• legacy API versions
• Container and ContainerConfig fields in Image inspect

Release Planning

• https://github.com/orgs/flatcar/projects/7/views/8

Administrative tasks after meeting concluded

• Create a new Github discussion for the next Flatcar Office Hours: https://github.com/flatcar/Flatcar/discussions/new?category=flatcar-office-hours
• Close this discussion as "Resolved".

[ader1990]

Hello, I would like to also shortly cover the upgrade of systemd from 255 to 256, upgrade that will have a breaking change - https://github.com/systemd/systemd/releases/tag/v256-rc3:

* Support for cgroup v1 ('legacy' and 'hybrid' hierarchies) is now
      considered obsolete and systemd by default will refuse to boot under
      it. To forcibly reenable cgroup v1 support,
      SYSTEMD_CGROUP_ENABLE_LEGACY_FORCE=1 must be set on kernel command
      line. The meson option 'default-hierarchy=' is also deprecated, i.e.
      only cgroup v2 ('unified' hierarchy) can be selected as build-time
      default.