The Intel microcode wasn't applied anymore after it was reworked to be
in the initrd instead of being built-in as part of the kernel image.
This was due to how the kernel build system can't handle combined
initrds and skip the early cpio when compressing. The AMD microcode was
still built-in as part of the kernel image.
Let the kernel build system pick up the Intel microcode by installing it
to the firmware directory. Disable the inclusion of microcode in the
initrd. Also, we can drop the preservation of the early cpio when
generating the minimal initrd.
Signed-off-by: Kai Lueke <kailuke@microsoft.com>
When /etc way kept busy through, e.g., a process using it as CWD, then
even in the temporary namespace unmounting failed unless it was done
with the lazy option.
This pulls in https://github.com/flatcar/update_engine/pull/52 to
address this.
Signed-off-by: Kai Lueke <kailuke@microsoft.com>
This pulls in https://github.com/flatcar/bootengine/pull/112 to support
kernel cmdline parameters that specify a custom release server URL to
use for downloading Flatcar extensions.
Signed-off-by: Kai Lueke <kailuke@microsoft.com>
The code was tripping up over whitespace, resulting in scary error
messages, and was more cumbersome than it needed to be.
Signed-off-by: James Le Cuirot <jlecuirot@microsoft.com>
KV_FULL wasn't being set before, so it was actually scanning all modules
under /lib/modules, not just the ones for the current kernel version.
Hopefully, we can eventually create an env file so that we can use the
upstream ebuild directly, but this at least brings them closer in line.
Signed-off-by: James Le Cuirot <jlecuirot@microsoft.com>
The growth of binaries over time and the inclusion of new features
filled the available boot partition space, so that the kernel+initrd
almost couldn't fit twice anymore as required for updates. We employed
workarounds such as wrapper scripts for ignition, afterburn and other
binaries so that they are loaded from /usr. However, this was still not
enough and we would have to do the same for (network) kernel modules and
firmware. To avoid making this ever more complex we can use a dedicated
initrd focused on loading the full initrd from /usr and then this full
initrd can use dracut as before and even drop all the workarounds we
accumulated.
Generate a minimal initrd to use instead of the full bootengine initrd.
The bootengine initrd gets stored as squashfs on /usr. The minimal
initrd still includes the early_cpio for amd64 microcode updates.
We have a fixed list of modules or module directories to include, only
focused on loading /usr and any emergency console interaction. This
requires also checking for module dependencies to copy over.
The busybox, veritysetup, and kmod binaries are needed and get their
required libraries resolved and copied over. They are not static and
use shared libraries which should be ok for now. The resulting vmlinuz
file is 27 MB for amd64, down from ~60 MB, so we have enough room to
include more kernel modules and so on for the next years while we also
grow the boot partition and wait for users to redeploy until we can rely
on a larger boot partition and eventually drop the minimal initrd again.
Pulls in https://github.com/flatcar/bootengine/pull/110 for the
minimal initrd script and https://github.com/flatcar/seismograph/pull/12
for making the device mapper discovery for the "rootdev" command more
reliable.
This also requied a backport of a kernel patch from 2017 that exposes
the PARTUUID in the /sys uevent file.
Co-authored-by: James Le Cuirot <jlecuirot@microsoft.com>
Signed-off-by: Kai Lueke <kailuke@microsoft.com>
