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examples: Add initial bootc examples (bls & uki)
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‎examples/bootc-bls/Containerfile‎

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FROM quay.io/fedora/fedora-bootc:42
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COPY extra /
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COPY cfsctl /usr/bin
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RUN passwd -d root
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# need to have composefs setup root in the initramfs so we need this
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RUN set -x; \
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kver=$(cd /usr/lib/modules && echo *); \
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dracut -vf --install "/etc/passwd /etc/group" /usr/lib/modules/$kver/initramfs.img $kver;

‎examples/bootc-bls/build‎

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#!/bin/bash
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set -eux
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cd "${0%/*}"
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cargo build --release --features=pre-6.15 --bin cfsctl --bin composefs-setup-root
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cp ../../target/release/cfsctl .
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cp ../../target/release/composefs-setup-root extra/usr/lib/dracut/modules.d/37composefs/
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mkdir -p tmp
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sudo podman build \
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-t quay.io/fedora/fedora-bootc-base-uki:42 \
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-f Containerfile.stage1 \
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--iidfile=tmp/iid \

‎examples/bootc-uki/Containerfile.stage1‎

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FROM quay.io/fedora/fedora-bootc:42
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COPY extra /
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COPY cfsctl /usr/bin
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RUN passwd -d root
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# need to have composefs setup root in the initramfs so we need this
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RUN set -x; \
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kver=$(cd /usr/lib/modules && echo *); \
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dracut -vf --install "/etc/passwd /etc/group" /usr/lib/modules/$kver/initramfs.img $kver;

‎examples/bootc-uki/Containerfile.stage2‎

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FROM quay.io/fedora/fedora-bootc-base-uki:42 AS base
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FROM base as kernel
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ARG COMPOSEFS_FSVERITY
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RUN <<EOF
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set -eux
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mkdir -p /etc/kernel /etc/dracut.conf.d
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echo "console=ttyS0,115200 composefs=${COMPOSEFS_FSVERITY} selinux=1 enforcing=0 systemd.debug_shell=1 root=UUID=6523f8ae-3eb1-4e2a-a05a-18b695ae656f rw" > /etc/kernel/cmdline
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dnf install -y systemd-ukify;
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kver=$(cd /usr/lib/modules && echo *);
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ukify build \
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--linux /usr/lib/modules/$kver/vmlinuz \
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--initrd /usr/lib/modules/$kver/initramfs.img \
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--cmdline "@/etc/kernel/cmdline" \
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--output /boot/$kver.efi
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EOF
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FROM base as final
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RUN --mount=type=bind,from=kernel,target=/_mount/kernel <<EOF
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kver=$(cd /usr/lib/modules && echo *);
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mkdir -p /boot/EFI/Linux
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# We put the UKI in /boot for now due to composefs verity not being the
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# same due to mtime of /usr/lib/modules being changed
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cp /_mount/kernel/boot/$kver.efi /boot/EFI/Linux/$kver.efi;
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EOF
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FROM base as final-final
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COPY --from=final /boot /boot

‎examples/bootc-uki/build.base‎

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#!/bin/bash
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set -eux
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cd "${0%/*}"
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cargo build --release --features=pre-6.15 --bin cfsctl --bin composefs-setup-root
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cp ../../target/release/cfsctl .
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cp ../../target/release/composefs-setup-root extra/usr/lib/dracut/modules.d/37composefs/
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mkdir -p tmp
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sudo podman build \
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-t quay.io/fedora/fedora-bootc-base-uki:42 \
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-f Containerfile.stage1 \
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--iidfile=tmp/iid \
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.

‎examples/bootc-uki/build.final‎

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#!/bin/bash
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set -eux
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cd "${0%/*}"
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cargo build --release --features=pre-6.15 --bin cfsctl --bin composefs-setup-root
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cp ../../target/release/cfsctl .
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rm -rf tmp/sysroot
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mkdir -p tmp/sysroot/composefs
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IMAGE_ID="$(sed s/sha256:// tmp/iid)"
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./cfsctl --repo tmp/sysroot/composefs oci pull containers-storage:"${IMAGE_ID}"
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COMPOSEFS_FSVERITY="$(./cfsctl --repo tmp/sysroot/composefs oci compute-id --bootable "${IMAGE_ID}")"
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sudo podman build \
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-t quay.io/fedora/fedora-bootc-uki:42 \
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--build-arg=COMPOSEFS_FSVERITY="${COMPOSEFS_FSVERITY}" \
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-f Containerfile.stage2 \
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--iidfile=tmp/iid2
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rm -rf tmp/efi
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mkdir -p tmp/efi
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./cfsctl --repo tmp/sysroot/composefs oci pull containers-storage:"${IMAGE_ID}"
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./cfsctl --repo tmp/sysroot/composefs oci compute-id --bootable "${IMAGE_ID}"
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./cfsctl --repo tmp/sysroot/composefs oci prepare-boot "${IMAGE_ID}" --bootdir tmp/efi
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# For debugging, add --no-cache to podman command
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# mkdir tmp/internal-sysroot
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# # podman build \
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# --iidfile=tmp/iid \
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# -v "${PWD}/tmp/internal-sysroot:/tmp/sysroot:z,U" \
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# --secret=id=key,src=secureboot/db.key \
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# --secret=id=cert,src=secureboot/db.crt \
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# See: https://wiki.archlinux.org/title/Unified_Extensible_Firmware_Interface/Secure_Boot
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# Alternative to generate keys for testing: `sbctl create-keys`
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# if [[ ! -d "secureboot" ]]; then
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# echo "Generating test Secure Boot keys"
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# mkdir secureboot
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# pushd secureboot > /dev/null
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# uuidgen --random > GUID.txt
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# openssl req -newkey rsa:4096 -nodes -keyout PK.key -new -x509 -sha256 -days 3650 -subj "/CN=Test Platform Key/" -out PK.crt
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# openssl x509 -outform DER -in PK.crt -out PK.cer
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# openssl req -newkey rsa:4096 -nodes -keyout KEK.key -new -x509 -sha256 -days 3650 -subj "/CN=Test Key Exchange Key/" -out KEK.crt
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# openssl x509 -outform DER -in KEK.crt -out KEK.cer
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# openssl req -newkey rsa:4096 -nodes -keyout db.key -new -x509 -sha256 -days 3650 -subj "/CN=Test Signature Database key/" -out db.crt
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# openssl x509 -outform DER -in db.crt -out db.cer
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# popd > /dev/null
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# fi

‎examples/bootc-uki/extra/etc/dracut.conf.d/no-xattr.conf‎

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export DRACUT_NO_XATTR=1

‎examples/bootc-uki/extra/usr/lib/dracut/dracut.conf.d/37composefs.conf‎

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# we want to make sure the virtio disk drivers get included
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hostonly=no
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# we need to force these in via the initramfs because we don't have modules in
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# the base image
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force_drivers+=" virtio_net vfat "

‎examples/bootc-uki/extra/usr/lib/dracut/modules.d/37composefs/composefs-pivot-sysroot‎

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‎examples/bootc-uki/extra/usr/lib/dracut/modules.d/37composefs/composefs-setup-root.service‎

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# Copyright (C) 2013 Colin Walters <[email protected]>
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#
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# This library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2 of the License, or (at your option) any later version.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with this library. If not, see <https://www.gnu.org/licenses/>.
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[Unit]
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DefaultDependencies=no
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ConditionKernelCommandLine=composefs
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ConditionPathExists=/etc/initrd-release
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After=sysroot.mount
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Requires=sysroot.mount
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Before=initrd-root-fs.target
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Before=initrd-switch-root.target
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OnFailure=emergency.target
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OnFailureJobMode=isolate
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[Service]
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Type=oneshot
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ExecStart=/usr/bin/composefs-setup-root
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StandardInput=null
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StandardOutput=journal
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StandardError=journal+console
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RemainAfterExit=yes

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