UCore stable kernel & prebuilt ZFS packages + Sanoid

- Kernel RPMs from ghcr.io/ublue-os/coreos-stable-kernel image
- Matching ZFS RPMs from ghcr.io/ublue-os/akmods-zfs image
- Sanoid installed from gregw-extras-fedora-40 COPR
- Remove RPM firefox

.github/workflows/build.yml

@@ -21,7 +21,7 @@ env:
 jobs:
   build_push_aurora:
     name: Build and publish SB image with ZFS
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-24.04
 
     permissions:
       contents: read

Containerfile

@@ -40,46 +40,29 @@ ARG SOURCE_TAG="40"
 
 ARG FEDORA_VERSION=40
 
-### 2. Build ZFS module
+## Cache images for CoreOS kernel & ZFS kmod RPMs
-## Adated from https://github.com/coreos/layering-examples/blob/main/build-zfs-module/Containerfile
+FROM ghcr.io/ublue-os/coreos-stable-kernel:${SOURCE_TAG} AS kernel-cache
-FROM ghcr.io/ublue-os/${SOURCE_IMAGE}${SOURCE_SUFFIX}:${SOURCE_TAG} as kernel-query
+FROM ghcr.io/ublue-os/akmods-zfs:coreos-stable-${SOURCE_TAG} AS zfs-cache
-RUN rpm -qa kernel --queryformat '%{VERSION}-%{RELEASE}.%{ARCH}' > /kernel-version.txt
-
-# Using https://openzfs.github.io/openzfs-docs/Developer%20Resources/Custom%20Packages.html
-FROM registry.fedoraproject.org/fedora:${FEDORA_VERSION} as builder
-COPY --from=kernel-query /kernel-version.txt /kernel-version.txt
-WORKDIR /etc/yum.repos.d
-RUN curl -L -O https://src.fedoraproject.org/rpms/fedora-repos/raw/f${FEDORA_VERSION}/f/fedora-updates-archive.repo && \
-    sed -i 's/enabled=AUTO_VALUE/enabled=true/' fedora-updates-archive.repo
-RUN dnf install -y jq dkms gcc make autoconf automake libtool rpm-build libtirpc-devel libblkid-devel \
-    libuuid-devel libudev-devel openssl-devel zlib-devel libaio-devel libattr-devel elfutils-libelf-devel \
-    kernel-$(cat /kernel-version.txt) kernel-modules-$(cat /kernel-version.txt) kernel-devel-$(cat /kernel-version.txt) \
-    python3 python3-devel python3-setuptools python3-cffi libffi-devel git ncompress libcurl-devel
-WORKDIR /
-# Uses project_id from: https://release-monitoring.org/project/11706/
-RUN curl "https://release-monitoring.org/api/v2/versions/?project_id=11706" | jq --raw-output '.stable_versions[0]' >> /zfs_version.txt
-RUN curl -L -O https://github.com/openzfs/zfs/releases/download/zfs-$(cat /zfs_version.txt)/zfs-$(cat /zfs_version.txt).tar.gz && \
-    tar xzf zfs-$(cat /zfs_version.txt).tar.gz && mv zfs-$(cat /zfs_version.txt) zfs
-WORKDIR /zfs
-RUN ./configure -with-linux=/usr/src/kernels/$(cat /kernel-version.txt)/ -with-linux-obj=/usr/src/kernels/$(cat /kernel-version.txt)/ \
-    && make -j1 rpm-utils rpm-kmod
 
 
-### 3. SOURCE IMAGE
+### 2. SOURCE IMAGE
 ## this is a standard Containerfile FROM using the build ARGs above to select the right upstream image
 FROM ghcr.io/ublue-os/${SOURCE_IMAGE}${SOURCE_SUFFIX}:${SOURCE_TAG}
 
-### 4 Add ZFS RPMS and matching kernel RPMs
+### 3. Add ZFS RPMS and matching kernel RPMs
-#COPY --from=ghcr.io/0ranki/sb-zfs-kernel /rpms/ /tmp/rpms
+# COPY --from=kernel-cache /tmp/rpms/* /tmp/rpms/
-COPY --from=builder /zfs/*.rpm /zfs/
+# COPY --from=zfs-cache /rpms/kmods/zfs/*.rpm /tmp/rpms/
 
-### 5. MODIFICATIONS
+### 4. MODIFICATIONS
 ## make modifications desired in your image and install packages by modifying the build.sh script
 ## the following RUN directive does all the things required to run "build.sh" as recommended.
 
 COPY build.sh /tmp/build.sh
 
-RUN mkdir -p /var/lib/alternatives && \
+RUN --mount=type=cache,dst=/var/cache/rpm-ostree \
+    --mount=type=bind,from=kernel-cache,src=/tmp/rpms,dst=/tmp/rpms/kernel \
+    --mount=type=bind,from=zfs-cache,src=/rpms/kmods/zfs,dst=/tmp/rpms/zfs \
+    mkdir -p /var/lib/alternatives && \
     /tmp/build.sh && \
     ostree container commit
 ## NOTES:

README.md

@@ -7,15 +7,9 @@ This is a customized Universal Blue image with the OpenZFS kernel module install
 See [upstream Universal Blue](https://github.com/ublue-os/main/) repo for more detailed instructions how
 to rebase to this image.
 
-The ZFS modules are built against the latest latest ublue-os:main image, Fedora 40 at the time of writing.
+Image uses CoreOS' `stable` kernel from [Universal Blue kernel-cache image](https://ghcr.io/ublue-os/coreos-stable-kernel) and
-Building the modules is basically taken straight from [Fedora CoreOS](https://github.com/coreos/layering-examples/tree/main/build-zfs-module)
+matching ZFS kmod RPMs from [Universal Blue `akmods-zfs` image](https://ghcr.io/ublue-os/akmods-zfs) are installed.
-example, except the base image used to detect the correct kernel version to build against is `ublue-os:main`.
 
-## Known issues
+Other additions, subject to change:
-The build fails consistently once a week. Most likely Fedora repos are already serving a newer kernel version,
+- RPM firefox removed
-while the pulled ublue image is still on the older kernel version. Next day's build succeeds, so this only means
+- Sanoid installed from [gregw/extras COPR](https://copr.fedorainfracloud.org/coprs/gregw/extras)
-a day without an updated image every week.
-
-Dependencies for Jim Salter's excellent [Sanoid/Syncoid](https://github.com/jimsalterjrs/sanoid) might become
-preinstalled at some stage, but for now I've decided to keep everything close to `ublue-os:main`. Suggestions,
-issues and pull requests are welcome.

build.sh

@@ -4,6 +4,16 @@ set -ouex pipefail
 
 RELEASE="$(rpm -E %fedora)"
 
+## Package overrides
+RMPKGS=(
+    firefox
+    firefox-langpacks
+)
+
+ADDPKGS=(
+    sanoid
+)
+
 ### Install packages
 
 # Packages can be installed from any enabled yum repo on the image.
@@ -11,8 +21,22 @@ RELEASE="$(rpm -E %fedora)"
 # List of rpmfusion packages can be found here:
 # https://mirrors.rpmfusion.org/mirrorlist?path=free/fedora/updates/39/x86_64/repoview/index.html&protocol=https&redirect=1
 
-rpm-ostree install \
+## Add gregw/extras COPR
-     /zfs/*.$(rpm -qa kernel --queryformat '%{ARCH}').rpm && \
+curl -so /etc/yum.repos.d/gregw-extras-fedora-40.repo https://copr.fedorainfracloud.org/coprs/gregw/extras/repo/fedora-40/gregw-extras-fedora-40.repo
+
+RMSTRING=""
+ADDSTRING=""
+
+for pkg in ${ADDPKGS[@]}; do
+    ADDSTRING="${ADDSTRING} --install=${pkg}"
+done
+
+for pkg in ${RMPKGS[@]}; do
+    RMSTRING="${RMSTRING} --remove=${pkg}"
+done
+
+rpm-ostree override replace ${ADDSTRING} ${RMSTRING} /tmp/rpms/kernel/*.rpm /tmp/rpms/zfs/*.rpm
+
 # Auto-load ZFS module
 depmod -a "$(rpm -qa kernel --queryformat '%{VERSION}-%{RELEASE}.%{ARCH}')" && \
 echo "zfs" > /etc/modules-load.d/zfs.conf && \