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

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

['Quirin Gylstorff' via isar-users]

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

-- 
2.51.0

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[RFC PATCH v3 01/10] add dracut to custom kernel builds

['Quirin Gylstorff' via isar-users]

From: Quirin Gylstorff <quirin.gylstorff@siemens.com>

Signed-off-by: Quirin Gylstorff <quirin.gylstorff@siemens.com>
---
 meta/recipes-kernel/linux/linux-custom.inc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/meta/recipes-kernel/linux/linux-custom.inc b/meta/recipes-kernel/linux/linux-custom.inc
index ca90c4e9..3ab35d8d 100644
--- a/meta/recipes-kernel/linux/linux-custom.inc
+++ b/meta/recipes-kernel/linux/linux-custom.inc
@@ -31,7 +31,7 @@ KBUILD_DEPENDS ?= "build-essential:native, \
                    linux-image-${KERNEL_NAME_PROVIDED}:${DISTRO_ARCH} <kbuild !kernel>, \
                    rsync,"
 
-KERNEL_DEBIAN_DEPENDS ?= "initramfs-tools | linux-initramfs-tool, \
+KERNEL_DEBIAN_DEPENDS ?= "initramfs-tools | linux-initramfs-tool | dracut, \
                           kmod, \
                           linux-base (>= 4.3~),"
 
-- 
2.51.0

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[RFC PATCH v3 02/10] rootfs: Allow to overwrite the initramfs generation cmds

['Quirin Gylstorff' via isar-users]

From: Quirin Gylstorff <quirin.gylstorff@siemens.com>

This is in preparation to support additional initramfs generators
like dracut.

Signed-off-by: Quirin Gylstorff <quirin.gylstorff@siemens.com>
---
 meta/classes/rootfs.bbclass | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/meta/classes/rootfs.bbclass b/meta/classes/rootfs.bbclass
index ebe3bf4a..ef2b7376 100644
--- a/meta/classes/rootfs.bbclass
+++ b/meta/classes/rootfs.bbclass
@@ -5,7 +5,13 @@ inherit deb-dl-dir
 
 ROOTFS_ARCH ?= "${DISTRO_ARCH}"
 ROOTFS_DISTRO ?= "${DISTRO}"
+
+def initramfs_generator_cmdline(d):
+    return "update-initramfs -u -v -k \"$kernel_version\""
+
 ROOTFS_PACKAGES ?= ""
+ROOTFS_INITRAMFS_GENERATOR_CMD = "${@ d.getVar('ROOTFS_INITRAMFS_GENERATOR_CMDLINE').split()[0]}"
+ROOTFS_INITRAMFS_GENERATOR_CMDLINE = "${@ initramfs_generator_cmdline(d)}"
 ROOTFS_BASE_DISTRO ?= "${BASE_DISTRO}"
 
 # Features of the rootfs creation:
@@ -183,7 +189,7 @@ rootfs_disable_initrd_generation[weight] = "1"
 rootfs_disable_initrd_generation() {
     # fully disable initrd generation
     sudo mkdir -p "${ROOTFSDIR}${ROOTFS_STUBS_DIR}"
-    sudo cp -a ${ROOTFSDIR}/usr/bin/true ${ROOTFSDIR}${ROOTFS_STUBS_DIR}/update-initramfs
+    sudo cp -a ${ROOTFSDIR}/usr/bin/true ${ROOTFSDIR}${ROOTFS_STUBS_DIR}/${ROOTFS_INITRAMFS_GENERATOR_CMD}
 }
 
 ROOTFS_INSTALL_COMMAND += "rootfs_install_pkgs_update"
@@ -486,12 +492,13 @@ rootfs_generate_initramfs() {
                 mods_total="$(find /usr/lib/modules/$kernel_version -type f -name '*.ko*' | wc -l)"; \
                 echo "Total number of modules: $mods_total"; \
                 echo "Generating initrd for kernel version: $kernel_version"; \
-                update-initramfs -u -v -k "$kernel_version"; \
+                ${ROOTFS_INITRAMFS_GENERATOR_CMDLINE}; \
             done;'
         if [ -n "${INITRD_DEPLOY_FILE}" ]; then
             if [ -f "${ROOTFSDIR}/initrd.img" ]; then
                 # debian (mkinitramfs)
-                cp ${ROOTFSDIR}/initrd.img ${DEPLOYDIR}/${INITRD_DEPLOY_FILE}
+                sudo cp ${ROOTFSDIR}/initrd.img ${DEPLOYDIR}/${INITRD_DEPLOY_FILE}
+                sudo chown $(id -u):$(id -g) ${DEPLOYDIR}/${INITRD_DEPLOY_FILE}
             else
                 # ubuntu (dracut)
                 cp ${ROOTFSDIR}/boot/initrd.img ${DEPLOYDIR}/${INITRD_DEPLOY_FILE}
-- 
2.51.0

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[RFC PATCH v3 03/10] rootfs Add dracut to initramfs generator

['Quirin Gylstorff' via isar-users]

From: Quirin Gylstorff <quirin.gylstorff@siemens.com>

Signed-off-by: Quirin Gylstorff <quirin.gylstorff@siemens.com>
---
 meta/classes/rootfs.bbclass | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/meta/classes/rootfs.bbclass b/meta/classes/rootfs.bbclass
index ef2b7376..a9f174d9 100644
--- a/meta/classes/rootfs.bbclass
+++ b/meta/classes/rootfs.bbclass
@@ -7,6 +7,9 @@ ROOTFS_ARCH ?= "${DISTRO_ARCH}"
 ROOTFS_DISTRO ?= "${DISTRO}"
 
 def initramfs_generator_cmdline(d):
+    rootfs_packages =  d.getVar('ROOTFS_PACKAGES') or ''
+    if 'dracut' in rootfs_packages:
+        return "dracut --force /initrd.img \"$kernel_version\""
     return "update-initramfs -u -v -k \"$kernel_version\""
 
 ROOTFS_PACKAGES ?= ""
-- 
2.51.0

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[RFC PATCH v3 04/10] initramfs: allow to set the generator command

['Quirin Gylstorff' via isar-users]

From: Quirin Gylstorff <quirin.gylstorff@siemens.com>

This allows to exchange the initramfs generator.

Signed-off-by: Quirin Gylstorff <quirin.gylstorff@siemens.com>
---
 meta/classes/initramfs.bbclass | 19 +++++++++++++++++--
 1 file changed, 17 insertions(+), 2 deletions(-)

diff --git a/meta/classes/initramfs.bbclass b/meta/classes/initramfs.bbclass
index 658ef0ac..862bd873 100644
--- a/meta/classes/initramfs.bbclass
+++ b/meta/classes/initramfs.bbclass
@@ -10,6 +10,7 @@ INITRAMFS_INSTALL ?= ""
 INITRAMFS_PREINSTALL ?= ""
 INITRAMFS_ROOTFS ?= "${WORKDIR}/rootfs"
 INITRAMFS_IMAGE_NAME = "${INITRAMFS_FULLNAME}.initrd.img"
+INITRAMFS_GENERATOR_PKG ??= "initramfs-tools"
 INITRD_DEPLOY_FILE = "${INITRAMFS_IMAGE_NAME}"
 
 # Install proper kernel
@@ -26,6 +27,20 @@ DEPENDS += "${INITRAMFS_INSTALL}"
 
 ROOTFSDIR = "${INITRAMFS_ROOTFS}"
 ROOTFS_FEATURES = "generate-manifest"
-ROOTFS_PACKAGES = "initramfs-tools ${INITRAMFS_PREINSTALL} ${INITRAMFS_INSTALL}"
-
+ROOTFS_PACKAGES = "${INITRAMFS_GENERATOR_PKG} ${INITRAMFS_PREINSTALL} ${INITRAMFS_INSTALL}"
+
+# validate if have incompatible packages in the installation list
+python do_validate_rootfs_packages () {
+    # in Debian initramfs-tools specific packages should end or star
+    # with initramfs
+    # dracut specific packages end with dracut
+    incompatible_initrd_packages = { 'initramfs-tools':['dracut'],
+                                     'dracut':['initramfs']}
+    initrd_generator = d.getVar("INITRAMFS_GENERATOR_PKG")
+    for invalid_generator_idenitifier in incompatible_initrd_packages.get(initrd_generator):
+        for pkg in d.getVar('ROOTFS_PACKAGES').split():
+            if invalid_generator_idenitifier  in pkg:
+                bb.error(f"{pkg} is incompatible with the selected generator '{initrd_generator}'")
+}
+addtask do_validate_rootfs_packages before do_rootfs_install
 inherit rootfs
-- 
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[RFC PATCH v3 05/10] Add class to generate custom dracut initramfs

['Quirin Gylstorff' via isar-users]

From: Quirin Gylstorff <quirin.gylstorff@siemens.com>

This class allows to customize a dracut initramfs by using
configuration files add addition modules and drivers.

It is recommended to use the addition of modules and drivers
sparely and prefer dracut configuration files.

This class has the option to add custom modules automatically to
the initramfs if:
 - The modules are provided by the ISAR build system
 - The module name is part of the package name, valid names are
   - dracut-<module-name>
   - <module-name>-dracut
   - <something>-dracut-<module-name>

Signed-off-by: Quirin Gylstorff <quirin.gylstorff@siemens.com>
---
 meta/classes/initrd-dracut.bbclass | 49 ++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)
 create mode 100644 meta/classes/initrd-dracut.bbclass

diff --git a/meta/classes/initrd-dracut.bbclass b/meta/classes/initrd-dracut.bbclass
new file mode 100644
index 00000000..a06296cc
--- /dev/null
+++ b/meta/classes/initrd-dracut.bbclass
@@ -0,0 +1,49 @@
+# This software is a part of ISAR.
+# This class provides the necessary options to
+# customize a dracut based initramfs.
+#
+# This class should not provide every dracut cmdline
+# option possible. Use the dracut configuration files.
+
+INITRAMFS_GENERATOR_PKG = "dracut"
+
+# The preferred way to configure dracut is to
+# provide dracut-config-<your-config> package which
+# contains all necessary config options
+DRACUT_CONFIG_PATH ??= ""
+DRACUT_EXTRA_DRIVERS ??= ""
+DRACUT_EXTRA_MODULES ??= ""
+DRACUT_EXTRACT_MODULES_FROM_PACKAGE_NAMES ??= "False"
+def extend_dracut_cmdline(d):
+    config_path = d.getVar('DRACUT_CONFIG_PATH') or ''
+    extra_drivers = d.getVar('DRACUT_CONFIG_PATH') or ''
+    extra_modules = d.getVar('DRACUT_CONFIG_PATH') or ''
+    enable_module_extraction = bb.utils.to_boolean(d.getVar('DRACUT_EXTRACT_MODULES_FROM_PACKAGE_LIST'))
+    pkg_list = d.getVar('INITRAMFS_INSTALL') or ''
+
+    cmdline = []
+    modules_from_pkg_names = []
+    if enable_module_extraction:
+        for pkg in pkg_list.split():
+            # Skip dracut-config-* packages
+            if pkg.startswith('dracut-config-'):
+                continue
+            elif pkg.startswith('dracut-'):
+                modules_from_pkg_names.append(pkg[7:])
+            elif pkg.endswith('-dracut'):
+                modules_from_pkg_names.append(pkg[:-7])
+            elif '-dracut-' in pkg:
+                _, module_name = pkg.split('-dracut-', 1)
+                modules_from_pkg_names.append(module_name)
+        extra_modules = extra_modules + ' ' +' '.join(modules_from_pkg_names)
+
+    if config_path:
+        cmdline.append(f"--conf {config_path}")
+    if extra_drivers:
+        cmdline.append(f"--add-drivers {extra_drivers}")
+    if extra_modules:
+        cmdline.append(f"--add {extra_modules}")
+    return ' '.join(cmdline)
+
+ROOTFS_INITRAMFS_GENERATOR_CMDLINE += "${@ extend_dracut_cmdline()}"
+inherit initramfs
-- 
2.51.0

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[RFC PATCH v3 06/10] rootfs: add flag to use dracut if it is not part of the package list

['Quirin Gylstorff' via isar-users]

From: Quirin Gylstorff <quirin.gylstorff@siemens.com>

This is intend for version where dracut is the default initramfs where
dracut is part of the dependency tree and not explicit requested.

Signed-off-by: Quirin Gylstorff <quirin.gylstorff@siemens.com>
---
 meta/classes/rootfs.bbclass | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/meta/classes/rootfs.bbclass b/meta/classes/rootfs.bbclass
index a9f174d9..a27c2a99 100644
--- a/meta/classes/rootfs.bbclass
+++ b/meta/classes/rootfs.bbclass
@@ -6,9 +6,10 @@ inherit deb-dl-dir
 ROOTFS_ARCH ?= "${DISTRO_ARCH}"
 ROOTFS_DISTRO ?= "${DISTRO}"
 
+ROOTFS_USE_DRACUT ??= ""
 def initramfs_generator_cmdline(d):
     rootfs_packages =  d.getVar('ROOTFS_PACKAGES') or ''
-    if 'dracut' in rootfs_packages:
+    if 'dracut' in rootfs_packages or bb.utils.to_boolean(d.getVar('ROOTFS_USE_DRACUT')):
         return "dracut --force /initrd.img \"$kernel_version\""
     return "update-initramfs -u -v -k \"$kernel_version\""
 
-- 
2.51.0

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[RFC PATCH v3 07/10] Add example dracut initramfs

['Quirin Gylstorff' via isar-users]

From: Quirin Gylstorff <quirin.gylstorff@siemens.com>

Signed-off-by: Quirin Gylstorff <quirin.gylstorff@siemens.com>
---
 .../recipes-initramfs/images/isar-dracut.bb     | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)
 create mode 100644 meta-isar/recipes-initramfs/images/isar-dracut.bb

diff --git a/meta-isar/recipes-initramfs/images/isar-dracut.bb b/meta-isar/recipes-initramfs/images/isar-dracut.bb
new file mode 100644
index 00000000..226fdeaa
--- /dev/null
+++ b/meta-isar/recipes-initramfs/images/isar-dracut.bb
@@ -0,0 +1,17 @@
+# Example of a custom initramfs image recipe.  The image will be deployed to
+#
+#   build/tmp/deploy/images/${MACHINE}/isar-initramfs-${DISTRO}-${MACHINE}.initrd.img
+#
+# This software is a part of ISAR.
+
+inherit initrd-dracut
+
+# Debian packages that should be installed into the system for building the
+# initramfs.  E.g. the cryptsetup package which contains initramfs scripts for
+# decrypting a root filesystem.
+INITRAMFS_PREINSTALL += " \
+    "
+
+# Recipes that should be installed into the initramfs build rootfs.
+INITRAMFS_INSTALL += " \
+    "
-- 
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[RFC PATCH v3 08/10] Add dracut module helper

['Quirin Gylstorff' via isar-users]

From: Quirin Gylstorff <quirin.gylstorff@siemens.com>

This adds a helper similar to initramfs-hook to generate a dracut
module.

Signed-off-by: Quirin Gylstorff <quirin.gylstorff@siemens.com>
---
 .../dracut-module/dracut-module.inc           | 41 +++++++++++++++++++
 .../dracut-module/files/module-setup.sh.tmpl  | 20 +++++++++
 2 files changed, 61 insertions(+)
 create mode 100644 meta/recipes-initramfs/dracut-module/dracut-module.inc
 create mode 100644 meta/recipes-initramfs/dracut-module/files/module-setup.sh.tmpl

diff --git a/meta/recipes-initramfs/dracut-module/dracut-module.inc b/meta/recipes-initramfs/dracut-module/dracut-module.inc
new file mode 100644
index 00000000..54071105
--- /dev/null
+++ b/meta/recipes-initramfs/dracut-module/dracut-module.inc
@@ -0,0 +1,41 @@
+#
+# Copyright (c) Siemens AG, 2025
+#
+# Authors:
+#  Quirin Gylstorff <quirin.gylstorff@siemens.com>
+#
+# SPDX-License-Identifier: MIT
+#
+
+inherit dpkg-raw
+
+FILESPATH:append := ":${FILE_DIRNAME}/files"
+
+DPKG_ARCH = "all"
+
+DRACUT_MODULE_SETUP = "module-setup.sh"
+SRC_URI += "file://${DRACUT_MODULE_SETUP}.tmpl"
+
+DRACUT_REQUIRED_BINARIES = ""
+DRACUT_MODULE_DEPENDENCIES = ""
+DRACUT_MODULE_NO ??= "50"
+DRACUT_MODULE_NAME ?= "${@ d.getVar('PN')[7:] if d.getVar('PN').startswith('dracut-') else d.getVAR('PN')}"
+
+TEMPLATE_FILES:append = " \
+    ${DRACUT_MODULE_SETUP}.tmpl \
+    "
+
+TEMPLATE_VARS:append = " \
+    DRACUT_REQUIRED_BINARIES \
+    DRACUT_MODULE_DEPENDENCIES \
+    "
+DEBIAN_DEPENDS = "dracut-core"
+DRACUT_MODULE_PATH = "${D}/usr/lib/dracut/modules.d/${DRACUT_MODULE_NO}${DRACUT_MODULE_NAME}/"
+do_install[cleandirs] += "${DRACUT_MODULE_PATH}"
+do_install:append() {
+    install -m 770 ${WORKDIR}/${DRACUT_MODULE_SETUP} ${DRACUT_MODULE_PATH}
+    if [ -f ${WORKDIR}/install.sh ]; then
+        cat ${WORKDIR}/install.sh >> ${DRACUT_MODULE_PATH}/${DRACUT_MODULE_SETUP}
+    fi
+}
+
diff --git a/meta/recipes-initramfs/dracut-module/files/module-setup.sh.tmpl b/meta/recipes-initramfs/dracut-module/files/module-setup.sh.tmpl
new file mode 100644
index 00000000..46477cf4
--- /dev/null
+++ b/meta/recipes-initramfs/dracut-module/files/module-setup.sh.tmpl
@@ -0,0 +1,20 @@
+#!/bin/bash
+
+# called by dracut
+check() {
+
+    # If the binary(s) requirements are not fulfilled the module can't be installed.
+    require_binaries \
+        ${DRACUT_REQUIRED_BINARIES} \
+        || return 1
+
+    return 0
+
+}
+# Module dependency requirements.
+depends() {
+    echo "${DRACUT_MODULE_DEPENDENCIES}"
+    return 0
+
+}
+
-- 
2.51.0

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[RFC PATCH v3 09/10] Use lighttpd as a example how to add a dracut module

['Quirin Gylstorff' via isar-users]

From: Quirin Gylstorff <quirin.gylstorff@siemens.com>

Signed-off-by: Quirin Gylstorff <quirin.gylstorff@siemens.com>
---
 .../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   |  3 ++
 6 files changed, 118 insertions(+)
 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

diff --git a/meta-isar/recipes-initramfs/dracut-example-lighttpd/dracut-example-lighttpd_0.1.bb b/meta-isar/recipes-initramfs/dracut-example-lighttpd/dracut-example-lighttpd_0.1.bb
new file mode 100644
index 00000000..7895e689
--- /dev/null
+++ b/meta-isar/recipes-initramfs/dracut-example-lighttpd/dracut-example-lighttpd_0.1.bb
@@ -0,0 +1,26 @@
+#
+# Copyright (c) Siemens AG, 2025
+#
+# Authors:
+#  Quirin Gylstorff <quirin.gylstorff@siemens.com>
+#
+# SPDX-License-Identifier: MIT
+#
+require recipes-initramfs/dracut-module/dracut-module.inc
+
+DEBIAN_DEPENDS:append = ",lighttpd"
+SRC_URI += "file://install.sh \
+            file://lighttpd.conf \
+            file://lighttpd.service \
+            file://sysuser-lighttpd.conf \
+            "
+DRACUT_REQUIRED_BINARIES = "lighttpd"
+DRACUT_MODULE_DEPENDENCIES = "systemd-network-management"
+
+do_install[cleandirs] += "${D}/usr/lib/sysusers.d/"
+do_install:append() {
+        install -m 666 ${WORKDIR}/lighttpd.conf ${DRACUT_MODULE_PATH}
+        install -m 666 ${WORKDIR}/lighttpd.service ${DRACUT_MODULE_PATH}
+        install -m 666 ${WORKDIR}/sysuser-lighttpd.conf ${D}/usr/lib/sysusers.d/lighttpd.conf
+}
+
diff --git a/meta-isar/recipes-initramfs/dracut-example-lighttpd/files/install.sh b/meta-isar/recipes-initramfs/dracut-example-lighttpd/files/install.sh
new file mode 100644
index 00000000..e7e50ad4
--- /dev/null
+++ b/meta-isar/recipes-initramfs/dracut-example-lighttpd/files/install.sh
@@ -0,0 +1,21 @@
+install() {
+        inst_binary /usr/sbin/lighttpd
+        inst_binary /usr/sbin/lighttpd-angel
+        inst_binary /usr/sbin/lighttpd-disable-mod
+        inst_binary /usr/sbin/lighttpd-enable-mod
+        inst_multiple -o /usr/lib/lighttpd/*.so
+        inst_multiple -o /usr/share/lighttpd/*
+        inst_simple "${moddir}/lighttpd.service" "$systemdsystemunitdir/lighttpd.service"
+        mkdir -p -m 0700 "$initdir/etc/lighttpd/"
+        mkdir -p -m 0700 "$initdir/var/cache/lighttpd/compress"
+        mkdir -p -m 0700 "$initdir/var/cache/lighttpd/uploads"
+        mkdir -p -m 0700 "$initdir/var/log/lighttpd/"
+        mkdir -p -m 0755 "$initdir/var/www/html"
+        /usr/bin/install -m 0644 /usr/share/lighttpd/index.html "$initdir/var/www/html/index.html"
+        touch "$moddir"/error.log
+        /usr/bin/install -m 0644 "$moddir"/error.log "$initdir/var/log/lighttpd/error.log"
+        chown -R www-data:www-data "$initdir/var/log/lighttpd/"
+        inst_simple "${moddir}/lighttpd.conf" /etc/lighttpd/lighttpd.conf
+        inst_sysusers lighttpd.conf
+        systemctl -q --root "$initdir" enable lighttpd
+}
diff --git a/meta-isar/recipes-initramfs/dracut-example-lighttpd/files/lighttpd.conf b/meta-isar/recipes-initramfs/dracut-example-lighttpd/files/lighttpd.conf
new file mode 100644
index 00000000..3a1bb351
--- /dev/null
+++ b/meta-isar/recipes-initramfs/dracut-example-lighttpd/files/lighttpd.conf
@@ -0,0 +1,52 @@
+server.modules = (
+	"mod_indexfile",
+	"mod_access",
+	"mod_alias",
+ 	"mod_redirect",
+)
+
+server.document-root        = "/var/www/html"
+server.upload-dirs          = ( "/var/cache/lighttpd/uploads" )
+server.errorlog             = "/var/log/lighttpd/error.log"
+server.pid-file             = "/run/lighttpd.pid"
+server.username             = "www-data"
+server.groupname            = "www-data"
+server.port                 = 80
+
+# features
+#https://redmine.lighttpd.net/projects/lighttpd/wiki/Server_feature-flagsDetails
+server.feature-flags       += ("server.h2proto" => "enable")
+server.feature-flags       += ("server.h2c"     => "enable")
+server.feature-flags       += ("server.graceful-shutdown-timeout" => 5)
+#server.feature-flags       += ("server.graceful-restart-bg" => "enable")
+
+# strict parsing and normalization of URL for consistency and security
+# https://redmine.lighttpd.net/projects/lighttpd/wiki/Server_http-parseoptsDetails
+# (might need to explicitly set "url-path-2f-decode" = "disable"
+#  if a specific application is encoding URLs inside url-path)
+server.http-parseopts = (
+  "header-strict"           => "enable",# default
+  "host-strict"             => "enable",# default
+  "host-normalize"          => "enable",# default
+  "url-normalize-unreserved"=> "enable",# recommended highly
+  "url-normalize-required"  => "enable",# recommended
+  "url-ctrls-reject"        => "enable",# recommended
+  "url-path-2f-decode"      => "enable",# recommended highly (unless breaks app)
+ #"url-path-2f-reject"      => "enable",
+  "url-path-dotseg-remove"  => "enable",# recommended highly (unless breaks app)
+ #"url-path-dotseg-reject"  => "enable",
+ #"url-query-20-plus"       => "enable",# consistency in query string
+)
+
+index-file.names            = ( "index.php", "index.html" )
+url.access-deny             = ( "~", ".inc" )
+static-file.exclude-extensions = ( ".php", ".pl", ".fcgi" )
+
+# default listening port for IPv6 falls back to the IPv4 port
+include "/etc/lighttpd/conf-enabled/*.conf"
+
+#server.compat-module-load   = "disable"
+server.modules += (
+	"mod_dirlisting",
+	"mod_staticfile",
+)
diff --git a/meta-isar/recipes-initramfs/dracut-example-lighttpd/files/lighttpd.service b/meta-isar/recipes-initramfs/dracut-example-lighttpd/files/lighttpd.service
new file mode 100644
index 00000000..da8c9033
--- /dev/null
+++ b/meta-isar/recipes-initramfs/dracut-example-lighttpd/files/lighttpd.service
@@ -0,0 +1,13 @@
+[Unit]
+Description=Lighttpd Daemon
+DefaultDependencies=no
+
+[Service]
+Type=simple
+PIDFile=/run/lighttpd.pid
+ExecStartPre=/usr/sbin/lighttpd -tt -f /etc/lighttpd/lighttpd.conf
+ExecStart=/usr/sbin/lighttpd -D -f /etc/lighttpd/lighttpd.conf
+ExecReload=/bin/kill -USR1 $MAINPID
+Restart=on-failure
+[Install]
+WantedBy=sysinit.target
diff --git a/meta-isar/recipes-initramfs/dracut-example-lighttpd/files/sysuser-lighttpd.conf b/meta-isar/recipes-initramfs/dracut-example-lighttpd/files/sysuser-lighttpd.conf
new file mode 100644
index 00000000..6507ccf3
--- /dev/null
+++ b/meta-isar/recipes-initramfs/dracut-example-lighttpd/files/sysuser-lighttpd.conf
@@ -0,0 +1,3 @@
+g www-data - -
+u www-data - - /var/www /usr/sbin/nologin
+
diff --git a/meta-isar/recipes-initramfs/images/isar-dracut.bb b/meta-isar/recipes-initramfs/images/isar-dracut.bb
index 226fdeaa..95739b12 100644
--- a/meta-isar/recipes-initramfs/images/isar-dracut.bb
+++ b/meta-isar/recipes-initramfs/images/isar-dracut.bb
@@ -14,4 +14,7 @@ INITRAMFS_PREINSTALL += " \
 
 # Recipes that should be installed into the initramfs build rootfs.
 INITRAMFS_INSTALL += " \
+    dracut-example-lighttpd \
     "
+
+DRACUT_EXTRA_MODULES += "example-lighttpd"
-- 
2.51.0

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[RFC PATCH v3 10/10] user_manual: Add dracut for initramfs generation

['Quirin Gylstorff' via isar-users]

From: Quirin Gylstorff <quirin.gylstorff@siemens.com>

Signed-off-by: Quirin Gylstorff <quirin.gylstorff@siemens.com>
---
 doc/user_manual.md | 51 ++++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 47 insertions(+), 4 deletions(-)

diff --git a/doc/user_manual.md b/doc/user_manual.md
index 67f91973..a4707f0a 100644
--- a/doc/user_manual.md
+++ b/doc/user_manual.md
@@ -1680,10 +1680,11 @@ SRC_URI += "docker://debian;digest=sha256:f528891ab1aa484bf7233dbcc84f3c806c3e42
 ## Customize the initramfs
 
 Isar supports the customization of initramfs images by providing an
-infrastructure for quickly creating hooks and by allowing to replace the
-Debian-generated image with a separately built one.
+infrastructure for quickly creating hooks in case of `initramfs-tools`
+or modules for `dracut` by allowing to replace the Debian-generated
+image with a separately built one.
 
-### Creating initramfs hooks
+### Creating initramfs-tools hooks
 
 To create an initramfs hook that adds tools or modules to the image and may
 also run custom scripts during boot, use the include file
@@ -1720,6 +1721,33 @@ initramfs.
 
 See `initramfs-example` for an exemplary hook recipe.
 
+### Creating dracut modules
+
+To create a custom dracut module that adds tools, kernel-modules or services
+to the initrd, use the include file `recipes-initramfs/dracut-module/dracut-module.inc`.
+It is controlled by following variables:
+
+- `DRACUT_REQUIRED_BINARIES` defines the binaries required by the module.
+- `DRACUT_MODULE_DEPENDENCIES` defines dependencies to other dracut modules.
+- `DRACUT_MODULE_NO` defines the module number which prefixes the module name
+to define the execution order.The default is `50`.
+- `DRACUT_MODULE_NAME` the name of the module which is used to install the
+module in the initrd or as a dependency to other modules. It defaults to
+`${PN}` without the prefix `dracut-`.
+- `DRACUT_MODULE_PATH` contains the path to the installed module. It is set
+to `${D}/usr/lib/dracut/modules.d/${DRACUT_MODULE_NO}${DRACUT_MODULE_NAME}/`
+
+The `install()` function is added by storing the file `install.sh` in the
+files directory of the dracut module.
+
+Other files can by added to the module by coping them to the Module folder
+with:
+```bash
+install -m 666 ${WORKDIR}/lighttpd.service ${DRACUT_MODULE_PATH}
+```
+
+See `dracut-example-lighttpd` for an exemplary hook recipe.
+
 ### Creating an initramfs image aside the rootfs
 
 To avoid shipping all tools and binaries needed to generate an initramfs, isar
@@ -1733,4 +1761,19 @@ self-built packages and `INITRAMFS_PREINSTALL` for prebuilt ones, analogously
 to the respective `IMAGE_*` variables. Note that the kernel is automatically
 added to `INITRAMFS_INSTALL` if `KERNEL_NAME` is set.
 
-See `isar-initramfs` for an example recipe.
+See `isar-initramfs` or `isar-dracut` for an example recipes.
+
+#### dracut config
+
+A dracut initramfs can be configured by the command line or a configuration file.
+The use configuration files is preferred:
+ - Debian provides dracut-config-* packages
+ - It is easier to upstream and to maintain.
+
+The configuration file can be chosen with the variable `DRACUT_CONFIG_PATH`. This variable
+contains the absolut path to the used configuration in the root file system.
+
+Still there are some use cases like debugging to add modules via the command line.
+For this the recipe meta/classes/initrd-dracut.bbclass provides the following options:
+ - `DRACUT_EXTRA_DRIVERS` add extra drivers to the dracut initrd
+ - `DRACUT_EXTRA_MODULES` add extra modules to the dracut initrd
-- 
2.51.0

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Re: [RFC PATCH v3 05/10] Add class to generate custom dracut initramfs

['cedric.hombourger@siemens.com' via isar-users]

On Mon, 2025-10-06 at 20:31 +0200, Quirin Gylstorff wrote:
> From: Quirin Gylstorff <quirin.gylstorff@siemens.com>
> 
> This class allows to customize a dracut initramfs by using
> configuration files add addition modules and drivers.

why restricting support for dracut to initramfs image recipes and not
supporting a switch to dracut for "normal" rootfs? I believe your patch
series provides all the required infrastructure to support both use-
cases

> 
> It is recommended to use the addition of modules and drivers
> sparely and prefer dracut configuration files.
> 
> This class has the option to add custom modules automatically to
> the initramfs if:
>  - The modules are provided by the ISAR build system
>  - The module name is part of the package name, valid names are
>    - dracut-<module-name>
>    - <module-name>-dracut
>    - <something>-dracut-<module-name>
> 
> Signed-off-by: Quirin Gylstorff <quirin.gylstorff@siemens.com>
> ---
>  meta/classes/initrd-dracut.bbclass | 49
> ++++++++++++++++++++++++++++++
>  1 file changed, 49 insertions(+)
>  create mode 100644 meta/classes/initrd-dracut.bbclass
> 
> diff --git a/meta/classes/initrd-dracut.bbclass
> b/meta/classes/initrd-dracut.bbclass
> new file mode 100644
> index 00000000..a06296cc
> --- /dev/null
> +++ b/meta/classes/initrd-dracut.bbclass
> @@ -0,0 +1,49 @@
> +# This software is a part of ISAR.
> +# This class provides the necessary options to
> +# customize a dracut based initramfs.
> +#
> +# This class should not provide every dracut cmdline
> +# option possible. Use the dracut configuration files.
> +
> +INITRAMFS_GENERATOR_PKG = "dracut"
> +
> +# The preferred way to configure dracut is to
> +# provide dracut-config-<your-config> package which
> +# contains all necessary config options
> +DRACUT_CONFIG_PATH ??= ""
> +DRACUT_EXTRA_DRIVERS ??= ""
> +DRACUT_EXTRA_MODULES ??= ""
> +DRACUT_EXTRACT_MODULES_FROM_PACKAGE_NAMES ??= "False"
> +def extend_dracut_cmdline(d):
> +    config_path = d.getVar('DRACUT_CONFIG_PATH') or ''
> +    extra_drivers = d.getVar('DRACUT_CONFIG_PATH') or ''
> +    extra_modules = d.getVar('DRACUT_CONFIG_PATH') or ''
> +    enable_module_extraction =
> bb.utils.to_boolean(d.getVar('DRACUT_EXTRACT_MODULES_FROM_PACKAGE_LIS
> T'))
> +    pkg_list = d.getVar('INITRAMFS_INSTALL') or ''
> +
> +    cmdline = []
> +    modules_from_pkg_names = []
> +    if enable_module_extraction:
> +        for pkg in pkg_list.split():
> +            # Skip dracut-config-* packages
> +            if pkg.startswith('dracut-config-'):
> +                continue
> +            elif pkg.startswith('dracut-'):
> +                modules_from_pkg_names.append(pkg[7:])
> +            elif pkg.endswith('-dracut'):
> +                modules_from_pkg_names.append(pkg[:-7])
> +            elif '-dracut-' in pkg:
> +                _, module_name = pkg.split('-dracut-', 1)
> +                modules_from_pkg_names.append(module_name)
> +        extra_modules = extra_modules + ' ' +'
> '.join(modules_from_pkg_names)
> +
> +    if config_path:
> +        cmdline.append(f"--conf {config_path}")
> +    if extra_drivers:
> +        cmdline.append(f"--add-drivers {extra_drivers}")
> +    if extra_modules:
> +        cmdline.append(f"--add {extra_modules}")
> +    return ' '.join(cmdline)
> +
> +ROOTFS_INITRAMFS_GENERATOR_CMDLINE += "${@ extend_dracut_cmdline()}"
> +inherit initramfs



-- 
Cedric Hombourger
Siemens AG
www.siemens.com

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Re: [RFC PATCH v3 05/10] Add class to generate custom dracut initramfs

['cedric.hombourger@siemens.com' via isar-users]

On Mon, 2025-10-06 at 20:31 +0200, Quirin Gylstorff wrote:
> From: Quirin Gylstorff <quirin.gylstorff@siemens.com>
> 
> This class allows to customize a dracut initramfs by using
> configuration files add addition modules and drivers.
> 
> It is recommended to use the addition of modules and drivers
> sparely and prefer dracut configuration files.
> 
> This class has the option to add custom modules automatically to
> the initramfs if:
>  - The modules are provided by the ISAR build system
>  - The module name is part of the package name, valid names are
>    - dracut-<module-name>
>    - <module-name>-dracut
>    - <something>-dracut-<module-name>
> 
> Signed-off-by: Quirin Gylstorff <quirin.gylstorff@siemens.com>
> ---
>  meta/classes/initrd-dracut.bbclass | 49
> ++++++++++++++++++++++++++++++
>  1 file changed, 49 insertions(+)
>  create mode 100644 meta/classes/initrd-dracut.bbclass
> 
> diff --git a/meta/classes/initrd-dracut.bbclass
> b/meta/classes/initrd-dracut.bbclass
> new file mode 100644
> index 00000000..a06296cc
> --- /dev/null
> +++ b/meta/classes/initrd-dracut.bbclass
> @@ -0,0 +1,49 @@
> +# This software is a part of ISAR.
> +# This class provides the necessary options to
> +# customize a dracut based initramfs.
> +#
> +# This class should not provide every dracut cmdline
> +# option possible. Use the dracut configuration files.
> +
> +INITRAMFS_GENERATOR_PKG = "dracut"
> +
> +# The preferred way to configure dracut is to
> +# provide dracut-config-<your-config> package which
> +# contains all necessary config options
> +DRACUT_CONFIG_PATH ??= ""
> +DRACUT_EXTRA_DRIVERS ??= ""
> +DRACUT_EXTRA_MODULES ??= ""
> +DRACUT_EXTRACT_MODULES_FROM_PACKAGE_NAMES ??= "False"
> +def extend_dracut_cmdline(d):
> +    config_path = d.getVar('DRACUT_CONFIG_PATH') or ''
> +    extra_drivers = d.getVar('DRACUT_CONFIG_PATH') or ''
> +    extra_modules = d.getVar('DRACUT_CONFIG_PATH') or ''
> +    enable_module_extraction =
> bb.utils.to_boolean(d.getVar('DRACUT_EXTRACT_MODULES_FROM_PACKAGE_LIS
> T'))
> +    pkg_list = d.getVar('INITRAMFS_INSTALL') or ''
> +
> +    cmdline = []
> +    modules_from_pkg_names = []
> +    if enable_module_extraction:
> +        for pkg in pkg_list.split():
> +            # Skip dracut-config-* packages
> +            if pkg.startswith('dracut-config-'):
> +                continue
> +            elif pkg.startswith('dracut-'):
> +                modules_from_pkg_names.append(pkg[7:])
> +            elif pkg.endswith('-dracut'):
> +                modules_from_pkg_names.append(pkg[:-7])
> +            elif '-dracut-' in pkg:
> +                _, module_name = pkg.split('-dracut-', 1)
> +                modules_from_pkg_names.append(module_name)
> +        extra_modules = extra_modules + ' ' +'
> '.join(modules_from_pkg_names)
> +
> +    if config_path:
> +        cmdline.append(f"--conf {config_path}")
> +    if extra_drivers:
> +        cmdline.append(f"--add-drivers {extra_drivers}")
> +    if extra_modules:
> +        cmdline.append(f"--add {extra_modules}")
> +    return ' '.join(cmdline)
> +
> +ROOTFS_INITRAMFS_GENERATOR_CMDLINE += "${@ extend_dracut_cmdline()}"

don't we need to pass (d) ?

> +inherit initramfs


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Re: [RFC PATCH v3 05/10] Add class to generate custom dracut initramfs

['Quirin Gylstorff' via isar-users]

On 10/9/25 07:22, Hombourger, Cedric (FT FDS CES LX) wrote:
> On Mon, 2025-10-06 at 20:31 +0200, Quirin Gylstorff wrote:
>> From: Quirin Gylstorff <quirin.gylstorff@siemens.com>
>>
>> This class allows to customize a dracut initramfs by using
>> configuration files add addition modules and drivers.
> 
> why restricting support for dracut to initramfs image recipes and not
> supporting a switch to dracut for "normal" rootfs? I believe your patch
> series provides all the required infrastructure to support both use-
> cases
> 

I didn't test it - but it should be possible to install dracut and it 
should switch normal rootfs to dracut.

This needs to be done by the user.

Quirin>>
>> It is recommended to use the addition of modules and drivers
>> sparely and prefer dracut configuration files.
>>
>> This class has the option to add custom modules automatically to
>> the initramfs if:
>>   - The modules are provided by the ISAR build system
>>   - The module name is part of the package name, valid names are
>>     - dracut-<module-name>
>>     - <module-name>-dracut
>>     - <something>-dracut-<module-name>
>>
>> Signed-off-by: Quirin Gylstorff <quirin.gylstorff@siemens.com>
>> ---
>>   meta/classes/initrd-dracut.bbclass | 49
>> ++++++++++++++++++++++++++++++
>>   1 file changed, 49 insertions(+)
>>   create mode 100644 meta/classes/initrd-dracut.bbclass
>>
>> diff --git a/meta/classes/initrd-dracut.bbclass
>> b/meta/classes/initrd-dracut.bbclass
>> new file mode 100644
>> index 00000000..a06296cc
>> --- /dev/null
>> +++ b/meta/classes/initrd-dracut.bbclass
>> @@ -0,0 +1,49 @@
>> +# This software is a part of ISAR.
>> +# This class provides the necessary options to
>> +# customize a dracut based initramfs.
>> +#
>> +# This class should not provide every dracut cmdline
>> +# option possible. Use the dracut configuration files.
>> +
>> +INITRAMFS_GENERATOR_PKG = "dracut"
>> +
>> +# The preferred way to configure dracut is to
>> +# provide dracut-config-<your-config> package which
>> +# contains all necessary config options
>> +DRACUT_CONFIG_PATH ??= ""
>> +DRACUT_EXTRA_DRIVERS ??= ""
>> +DRACUT_EXTRA_MODULES ??= ""
>> +DRACUT_EXTRACT_MODULES_FROM_PACKAGE_NAMES ??= "False"
>> +def extend_dracut_cmdline(d):
>> +    config_path = d.getVar('DRACUT_CONFIG_PATH') or ''
>> +    extra_drivers = d.getVar('DRACUT_CONFIG_PATH') or ''
>> +    extra_modules = d.getVar('DRACUT_CONFIG_PATH') or ''
>> +    enable_module_extraction =
>> bb.utils.to_boolean(d.getVar('DRACUT_EXTRACT_MODULES_FROM_PACKAGE_LIS
>> T'))
>> +    pkg_list = d.getVar('INITRAMFS_INSTALL') or ''
>> +
>> +    cmdline = []
>> +    modules_from_pkg_names = []
>> +    if enable_module_extraction:
>> +        for pkg in pkg_list.split():
>> +            # Skip dracut-config-* packages
>> +            if pkg.startswith('dracut-config-'):
>> +                continue
>> +            elif pkg.startswith('dracut-'):
>> +                modules_from_pkg_names.append(pkg[7:])
>> +            elif pkg.endswith('-dracut'):
>> +                modules_from_pkg_names.append(pkg[:-7])
>> +            elif '-dracut-' in pkg:
>> +                _, module_name = pkg.split('-dracut-', 1)
>> +                modules_from_pkg_names.append(module_name)
>> +        extra_modules = extra_modules + ' ' +'
>> '.join(modules_from_pkg_names)
>> +
>> +    if config_path:
>> +        cmdline.append(f"--conf {config_path}")
>> +    if extra_drivers:
>> +        cmdline.append(f"--add-drivers {extra_drivers}")
>> +    if extra_modules:
>> +        cmdline.append(f"--add {extra_modules}")
>> +    return ' '.join(cmdline)
>> +
>> +ROOTFS_INITRAMFS_GENERATOR_CMDLINE += "${@ extend_dracut_cmdline()}"
>> +inherit initramfs
> 
> 
> 


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Re: [RFC PATCH v3 05/10] Add class to generate custom dracut initramfs

['Quirin Gylstorff' via isar-users]

On 10/9/25 08:21, Hombourger, Cedric (FT FDS CES LX) wrote:
> On Mon, 2025-10-06 at 20:31 +0200, Quirin Gylstorff wrote:
>> From: Quirin Gylstorff <quirin.gylstorff@siemens.com>
>>
>> This class allows to customize a dracut initramfs by using
>> configuration files add addition modules and drivers.
>>
>> It is recommended to use the addition of modules and drivers
>> sparely and prefer dracut configuration files.
>>
>> This class has the option to add custom modules automatically to
>> the initramfs if:
>>   - The modules are provided by the ISAR build system
>>   - The module name is part of the package name, valid names are
>>     - dracut-<module-name>
>>     - <module-name>-dracut
>>     - <something>-dracut-<module-name>
>>
>> Signed-off-by: Quirin Gylstorff <quirin.gylstorff@siemens.com>
>> ---
>>   meta/classes/initrd-dracut.bbclass | 49
>> ++++++++++++++++++++++++++++++
>>   1 file changed, 49 insertions(+)
>>   create mode 100644 meta/classes/initrd-dracut.bbclass
>>
>> diff --git a/meta/classes/initrd-dracut.bbclass
>> b/meta/classes/initrd-dracut.bbclass
>> new file mode 100644
>> index 00000000..a06296cc
>> --- /dev/null
>> +++ b/meta/classes/initrd-dracut.bbclass
>> @@ -0,0 +1,49 @@
>> +# This software is a part of ISAR.
>> +# This class provides the necessary options to
>> +# customize a dracut based initramfs.
>> +#
>> +# This class should not provide every dracut cmdline
>> +# option possible. Use the dracut configuration files.
>> +
>> +INITRAMFS_GENERATOR_PKG = "dracut"
>> +
>> +# The preferred way to configure dracut is to
>> +# provide dracut-config-<your-config> package which
>> +# contains all necessary config options
>> +DRACUT_CONFIG_PATH ??= ""
>> +DRACUT_EXTRA_DRIVERS ??= ""
>> +DRACUT_EXTRA_MODULES ??= ""
>> +DRACUT_EXTRACT_MODULES_FROM_PACKAGE_NAMES ??= "False"
>> +def extend_dracut_cmdline(d):
>> +    config_path = d.getVar('DRACUT_CONFIG_PATH') or ''
>> +    extra_drivers = d.getVar('DRACUT_CONFIG_PATH') or ''
>> +    extra_modules = d.getVar('DRACUT_CONFIG_PATH') or ''
>> +    enable_module_extraction =
>> bb.utils.to_boolean(d.getVar('DRACUT_EXTRACT_MODULES_FROM_PACKAGE_LIS
>> T'))
>> +    pkg_list = d.getVar('INITRAMFS_INSTALL') or ''
>> +
>> +    cmdline = []
>> +    modules_from_pkg_names = []
>> +    if enable_module_extraction:
>> +        for pkg in pkg_list.split():
>> +            # Skip dracut-config-* packages
>> +            if pkg.startswith('dracut-config-'):
>> +                continue
>> +            elif pkg.startswith('dracut-'):
>> +                modules_from_pkg_names.append(pkg[7:])
>> +            elif pkg.endswith('-dracut'):
>> +                modules_from_pkg_names.append(pkg[:-7])
>> +            elif '-dracut-' in pkg:
>> +                _, module_name = pkg.split('-dracut-', 1)
>> +                modules_from_pkg_names.append(module_name)
>> +        extra_modules = extra_modules + ' ' +'
>> '.join(modules_from_pkg_names)
>> +
>> +    if config_path:
>> +        cmdline.append(f"--conf {config_path}")
>> +    if extra_drivers:
>> +        cmdline.append(f"--add-drivers {extra_drivers}")
>> +    if extra_modules:
>> +        cmdline.append(f"--add {extra_modules}")
>> +    return ' '.join(cmdline)
>> +
>> +ROOTFS_INITRAMFS_GENERATOR_CMDLINE += "${@ extend_dracut_cmdline()}"
> 
> don't we need to pass (d) ?
> 
Yes, there is d missing i need to check why in didn't fail my tests.
Quirin

>> +inherit initramfs
> 
> 

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