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Add a kernel-dev tarball with kernel headers

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These headers are needed for defining kernel probes etc, tested with
eBPF. Could also be used for perf, building kernel modules etc. Saved
to the media tarball at present, may add to base image or container.

Also rationalise the paths in the headers tarball a little to match.

Will add an eBPF container using these later.

Signed-off-by: Justin Cormack <justin.cormack@docker.com>
This commit is contained in:
Justin Cormack
2017-01-04 12:10:30 +00:00
parent 0c31b4e64f
commit 3930ad787b
5 changed files with 51 additions and 15 deletions
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21
alpine/kernel/Dockerfile
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@@ -32,8 +32,23 @@ RUN make defconfig && \
make oldconfig && \
make -j "$(getconf _NPROCESSORS_ONLN)" KCFLAGS="-fno-pie"
RUN make INSTALL_MOD_PATH=/tmp/kernel-modules modules_install && \
make INSTALL_HDR_PATH=/tmp headers_install && \
( cd /tmp && tar cf /kernel-headers.tar include ) && \
( cd /tmp/kernel-modules && tar cf /kernel-modules.tar . )
( DVER=$(basename $(find /tmp/kernel-modules/lib/modules/ -mindepth 1 -maxdepth 1)) && \
cd /tmp/kernel-modules/lib/modules/$DVER && \
rm build source && \
ln -s /usr/src/linux-headers-$DVER build ) && \
mkdir -p /tmp/kernel-headers/usr && \
make INSTALL_HDR_PATH=/tmp/kernel-headers/usr headers_install && \
( cd /tmp/kernel-headers && tar cf /kernel-headers.tar usr ) && \
( cd /tmp/kernel-modules && tar cf /kernel-modules.tar lib ) && \
cp vmlinux arch/x86_64/boot/bzImage /
RUN DVER=$(basename $(find /tmp/kernel-modules/lib/modules/ -mindepth 1 -maxdepth 1)) && \
dir=/tmp/usr/src/linux-headers-$DVER && \
mkdir -p $dir && \
cp /linux/.config $dir && \
cd /linux && \
cp -a include "$dir" && \
mkdir -p "$dir"/arch/x86 && cp -a arch/x86/include "$dir"/arch/x86/ && \
( cd /tmp && tar cf /kernel-dev.tar usr/src )
RUN printf "KERNEL_SOURCE=${KERNEL_SOURCE}\n" > /kernel-source-info