@@ -67,6 +67,8 @@ inherit essential
ROOTFSDIR = "${IMAGE_ROOTFS}"
ROOTFS_FEATURES += "clean-package-cache clean-pycache generate-manifest export-dpkg-status clean-log-files clean-debconf-cache"
+# when using a custom initrd, do not generate one as part of the image rootfs
+ROOTFS_FEATURES += "${@ '' if d.getVar('INITRD_IMAGE') == '' else 'no-generate-initrd'}"
ROOTFS_PACKAGES += "${IMAGE_PREINSTALL} ${@isar_multiarch_packages('IMAGE_INSTALL', d)}"
ROOTFS_MANIFEST_DEPLOY_DIR ?= "${DEPLOY_DIR_IMAGE}"
ROOTFS_DPKGSTATUS_DEPLOY_DIR ?= "${DEPLOY_DIR_IMAGE}"
@@ -475,6 +477,8 @@ do_rootfs_quality_check() {
args="${ROOTFS_QA_FIND_ARGS}"
# rootfs_finalize chroot-setup.sh
args="${args} ! -path ${ROOTFSDIR}/var/lib/dpkg/diversions"
+ # initramfs is generated outside of the image rootfs
+ args="${args} ! -path ${ROOTFSDIR}/boot/initrd.img*"
for cmd in ${ROOTFS_POSTPROCESS_COMMAND}; do
case "${cmd}" in
image_postprocess_mark)
@@ -14,6 +14,7 @@ ROOTFS_BASE_DISTRO ?= "${BASE_DISTRO}"
# 'generate-manifest' - generate a package manifest of the rootfs into ${ROOTFS_MANIFEST_DEPLOY_DIR}
# 'export-dpkg-status' - exports /var/lib/dpkg/status file to ${ROOTFS_DPKGSTATUS_DEPLOY_DIR}
# 'clean-log-files' - delete log files that are not owned by packages
+# 'no-generate-initrd' - do not generate debian default initrd
ROOTFS_FEATURES ?= ""
ROOTFS_APT_ARGS="install --yes -o Debug::pkgProblemResolver=yes"
@@ -117,6 +118,16 @@ rootfs_configure_apt() {
EOSUDO
}
+ROOTFS_CONFIGURE_COMMAND += "rootfs_disable_initrd_generation"
+rootfs_disable_initrd_generation[weight] = "1"
+rootfs_disable_initrd_generation() {
+ # fully disable initrd generation
+ echo "replace update-initramfs with stub"
+ sudo mv "${ROOTFSDIR}/usr/sbin/update-initramfs" \
+ "${ROOTFSDIR}/usr/sbin/update-initramfs.isar"
+ sudo chroot "${ROOTFSDIR}" ln -s "/usr/bin/true" "/usr/sbin/update-initramfs"
+}
+
ROOTFS_INSTALL_COMMAND += "rootfs_install_pkgs_update"
rootfs_install_pkgs_update[weight] = "5"
@@ -318,6 +329,27 @@ rootfs_cleanup_base_apt() {
EOSUDO
}
+ROOTFS_POSTPROCESS_COMMAND += "rootfs_restore_initrd_tooling"
+rootfs_restore_initrd_tooling[weight] = "1"
+rootfs_restore_initrd_tooling() {
+ if [ -e "${ROOTFSDIR}/usr/sbin/update-initramfs.isar" ]; then
+ sudo mv -f "${ROOTFSDIR}/usr/sbin/update-initramfs.isar" \
+ "${ROOTFSDIR}/usr/sbin/update-initramfs"
+ fi
+}
+
+ROOTFS_POSTPROCESS_COMMAND += "${@bb.utils.contains('ROOTFS_FEATURES', 'no-generate-initrd', '', 'rootfs_generate_initrd', d)}"
+rootfs_generate_initrd[weight] = "10"
+rootfs_generate_initrd() {
+ if [ -n "$(sudo find '${ROOTFSDIR}/boot' -type f -name 'vmlinu[xz]*')" ]; then
+ sudo -E chroot "${ROOTFSDIR}" sh -c '\
+ export kernel_version=$(basename /boot/vmlinu[xz]* | cut -d'-' -f2-); \
+ update-initramfs -u -v -k "$kernel_version";'
+ else
+ echo "no kernel in this rootfs, do not generate initrd"
+ fi
+}
+
do_rootfs_postprocess[vardeps] = "${ROOTFS_POSTPROCESS_COMMAND}"
do_rootfs_postprocess[network] = "${TASK_USE_SUDO}"
python do_rootfs_postprocess() {
@@ -24,6 +24,8 @@ DISTRO_BOOTSTRAP_KEYFILES = ""
THIRD_PARTY_APT_KEYFILES = ""
DEPLOY_ISAR_BOOTSTRAP ?= ""
DISTRO_BOOTSTRAP_BASE_PACKAGES = "locales"
+# install early, so we can stub the update-initramfs script before rootfs install
+DISTRO_BOOTSTRAP_BASE_PACKAGES:append = ",initramfs-tools"
DISTRO_BOOTSTRAP_BASE_PACKAGES:append:gnupg = ",gnupg"
DISTRO_BOOTSTRAP_BASE_PACKAGES:append:https-support = ",ca-certificates"
DISTRO_VARS_PREFIX ?= "${@'HOST_' if bb.utils.to_boolean(d.getVar('BOOTSTRAP_FOR_HOST')) else ''}"
This patch solves major performance issues around the initramfs creation by ensuring that the initrd is only created once. This is implemented by stubbing the update-initramfs call during the package installing. After all apt operations are completed, we manually trigger the initrd creation. In case a custom initramfs is used, the creation is completely skipped in the image rootfs, as this would anyways not be used. Before that, each package install that made a initrd relevant change triggered the update of the initrd. As we have multiple apt calls during the build, this step was sometimes executed multiple times. In addition, the apt install step is emulated, further slowing down the initrd generation. On some layers on non native architecutes, this summed up to over 10 minutes of initrd generation time. Signed-off-by: Felix Moessbauer <felix.moessbauer@siemens.com> --- meta/classes/image.bbclass | 4 +++ meta/classes/rootfs.bbclass | 32 +++++++++++++++++++ .../isar-bootstrap/isar-bootstrap.inc | 2 ++ 3 files changed, 38 insertions(+)