These overlay directories are automatically committed to the build OSTree repo
by coreos-assembler. They are then explicitly included in our various manifest
files via ostree-layers (this used to be done automatically, but that's no
longer the case).
Import 05core overlay from fedora-coreos-config
Blacklist the nouveau driver because it causes issues with some NVidia GPUs in EC2, and we don't have a use case for FCOS with nouveau.
"Cannot boot an p3.2xlarge instance with RHCOS (g3.4xlarge is working)" https://bugzilla.redhat.com/show_bug.cgi?id=1700056
General RHCOS specific overlay.
Real Time kernel support extracted from tuned.
Handle DHCP-provided NTP servers and configure chrony to use them, without overwriting platform-specific configuration. Can be removed once changes in upstream chrony with support for per-platform defaults (https://bugzilla.redhat.com/show_bug.cgi?id=1828434), and handling in 20-chrony and chrony-helper using the defaults lands in downstream packages. See upstream thread: https://listengine.tuxfamily.org/chrony.tuxfamily.org/chrony-dev/2020/05/msg00022.html
We want to provide Azure udev rules as part of the initrd, so that Ignition is able to detect disks and act on them. The WALinuxAgent-udev has been changed to install udev rules into the initramfs, but that change isn't in el8 yet. This can be dropped when moving to el9.
NVMe by-id/ symlinks changed wrt leading spaces from RHEL8 to RHEL9: https://issues.redhat.com/browse/OCPBUGS-11375 systemd/systemd#27155
This overlay ships a rule that adds back the previous symlinks for backwards
compatibility. TBD when we can drop this, e.g. by having layered software use
the eui links instead or pivoting to GPT partition UUIDs. Customers may have
also manually typed the old symlink in their Ignition configs and other k8s
resources though. Those would require some communication before we can rip this
out.
Add udev rules and scripts needed from google-guest-configs [1] for disk configuration in GCP, such as local SSD controllers (nvme and scsi).
The udev rules are also needed in the initramfs [2] and are delivered here via a dracut module.
The google-compute-engine-guest-configs-udev package that exists in Fedora delivers these files. We should drop this module when it exists in RHEL too.
[1] https://github.com/GoogleCloudPlatform/guest-configs/tree/master/src/lib/udev [2] https://issues.redhat.com/browse/OCPBUGS-10942 [3] https://bugzilla.redhat.com/show_bug.cgi?id=2182865