*** This bug is a duplicate of bug 2100296 ***
https://bugs.launchpad.net/bugs/2100296
** Also affects: dracut (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/2111811
Title:
Duplicate initrds in /boot/efi partition with dracut
Status in dracut package in Ubuntu:
New
Status in systemd package in Ubuntu:
New
Bug description:
This issue involves systemd (the kernel-install command, the
/usr/lib/kernel/install.d/55-initrd.install script that copies
/boot/initrd.img-$KERNEL_VERSION from /boot to /boot/efi), third-party
scripts hooking into kernel-install like dracut-core's
/usr/lib/kernel/install.d/50-dracut.install, and dracut, which
provides /etc/kernel/postinst.d/dracut which is run by kernel-image
maintainer scripts like /var/lib/dpkg/info/linux-
image-6.14.0-15-generic.postinst.
Steps (thanks to execsnoop):
- /etc/kernel/postinst.d/dracut generates /boot/initrd.img-$KERNEL_VERSION
- /etc/kernel/postinst.d/initramfs-tools calls update-initramfs (shipped by
either dracut or initramfs-tools)
- /usr/sbin/update-initramfs calls
/etc/initramfs/post-update.d/systemd-boot, which calls kernel-install
- /etc/kernel/postinst.d/zz-systemd-boot also calls kernel-install if neither
dracut nor initramfs-tools is installed
- kernel-install then runs:
- /usr/lib/kernel/install.d/50-dracut.install from dracut-core, which runs
dracut again, generates /boot/efi/$MACHINE_ID/$KERNEL_VERSION/initrd
- /usr/lib/kernel/install.d/55-initrd.install from systemd which copies
/boot/initrd.img-$KERNEL_VERSION to
/boot/efi/$MACHINE_ID/$KERNEL_VERSION/initrd.img-$KERNEL_VERSION
Which is how the EFI system partition ends up with duplicate initrds for
every kernel version.
ESP space is limited and hard to grow so this is problematic.
On 25.04 plucky, it is possible to have dracut-core installed, dracut
and initramfs-tools both purged, in which case dracut-core will still
generate an /boot/efi/$MACHINE_ID/$KERNEL_VERSION/initrd,
/boot/initrd.img-$KERNEL_VERSION won't be generated for newly
installed kernels, and the duplication is avoided.
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