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[RFC,v3,00/10] Add support for dracut

Message ID 20251006183214.1593195-1-Quirin.Gylstorff@siemens.com
Headers show
Series Add support for dracut | expand

Message

Quirin Gylstorff Oct. 6, 2025, 6:31 p.m. UTC 
From: Quirin Gylstorff <quirin.gylstorff@siemens.com>

Debian intends to change the default initrd generator from
initramfs-tools to dracut[1],[2].

This is a first draft to support multiple initrd generator in
ISAR. I tested it with bookworm and trixie.

Currently missing is the possibility to generate custom dracut initrd.
This will be added in a future revision of this patch set.

[1]: https://salsa.debian.org/kernel-team/meetings/-/wikis/20250730
[2]: https://meetbot.debian.net/debian-kernel/2025/debian-kernel.2025-08-06-19.00.log.html

Changes v3:
 - drop initramfs patch
 - add examples
 - add user_manual section

Changes v2:
 - extract the initramfs-cmd from the cmdline
 - increase version of enable-fsck
 - add function to print an error in case a invalid package is installed

Quirin Gylstorff (10):
  add dracut to custom kernel builds
  rootfs: Allow to overwrite the initramfs generation cmds
  rootfs Add dracut to initramfs generator
  initramfs: allow to set the generator command
  Add class to generate custom dracut initramfs
  rootfs: add flag to use dracut if it is not part of the package list
  Add example dracut initramfs
  Add dracut module helper
  Use lighttpd as a example how to add a dracut module
  user_manual: Add dracut for initramfs generation

 doc/user_manual.md                            | 51 ++++++++++++++++--
 .../dracut-example-lighttpd_0.1.bb            | 26 ++++++++++
 .../dracut-example-lighttpd/files/install.sh  | 21 ++++++++
 .../files/lighttpd.conf                       | 52 +++++++++++++++++++
 .../files/lighttpd.service                    | 13 +++++
 .../files/sysuser-lighttpd.conf               |  3 ++
 .../recipes-initramfs/images/isar-dracut.bb   | 20 +++++++
 meta/classes/initramfs.bbclass                | 19 ++++++-
 meta/classes/initrd-dracut.bbclass            | 49 +++++++++++++++++
 meta/classes/rootfs.bbclass                   | 17 ++++--
 .../dracut-module/dracut-module.inc           | 41 +++++++++++++++
 .../dracut-module/files/module-setup.sh.tmpl  | 20 +++++++
 meta/recipes-kernel/linux/linux-custom.inc    |  2 +-
 13 files changed, 324 insertions(+), 10 deletions(-)
 create mode 100644 meta-isar/recipes-initramfs/dracut-example-lighttpd/dracut-example-lighttpd_0.1.bb
 create mode 100644 meta-isar/recipes-initramfs/dracut-example-lighttpd/files/install.sh
 create mode 100644 meta-isar/recipes-initramfs/dracut-example-lighttpd/files/lighttpd.conf
 create mode 100644 meta-isar/recipes-initramfs/dracut-example-lighttpd/files/lighttpd.service
 create mode 100644 meta-isar/recipes-initramfs/dracut-example-lighttpd/files/sysuser-lighttpd.conf
 create mode 100644 meta-isar/recipes-initramfs/images/isar-dracut.bb
 create mode 100644 meta/classes/initrd-dracut.bbclass
 create mode 100644 meta/recipes-initramfs/dracut-module/dracut-module.inc
 create mode 100644 meta/recipes-initramfs/dracut-module/files/module-setup.sh.tmpl