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Makefile: T2640: add helper to convert ISO to OCI image to start a container

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Use either "make oci" or call the script manually:

$ scripts/iso-to-oci build/live-image-amd64.hybrid.iso

I: mount ISO build/live-image-amd64.hybrid.iso
I: extracting squashfs content
I: generate OCI container image vyos-1.5-strongswan-202311241125.tar
I: to import the previously generated OCI image to your local images run:

   docker import vyos-1.5-strongswan-202311241125.tar vyos:1.5-strongswan-202311241125 --change 'CMD [/sbin/init]'
This commit is contained in:
Christian Breunig 2023-11-26 20:12:29 +01:00
parent 0411ec870e
commit 499e8e1cbb
3 changed files with 69 additions and 0 deletions
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1
.gitignore vendored
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@ -7,3 +7,4 @@ packages/*
!packages/*/
testinstall*.img
*.qcow2
*.tar

5
Makefile
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@ -59,6 +59,11 @@ testraid: checkiso
qemu-live: checkiso
scripts/check-qemu-install --qemu-cmd build/live-image-amd64.hybrid.iso
.PHONE: oci
.ONESHELL:
oci: checkiso
scripts/iso-to-oci build/live-image-amd64.hybrid.iso
.PHONY: clean
.ONESHELL:
clean:

63
scripts/iso-to-oci Executable file
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@ -0,0 +1,63 @@
#!/bin/bash
function cleanup() {
if [[ -d $ROOTFS ]]; then
rm -rf $ROOTFS
fi
if [[ -d $UNSQUASHFS ]]; then
rm -rf $UNSQUASHFS
fi
}
if [[ $(/usr/bin/id -u) -ne 0 ]]; then
echo "Not running as root"
exit
fi
if [ "$#" -ne 1 ]; then
echo "Illegal number of parameters"
fi
ISO=$1
ROOTFS=rootfs
UNSQUASHFS=unsquashfs
# ensure clean working directory
cleanup
mkdir $ROOTFS $UNSQUASHFS
echo "I: mount ISO $ISO"
mount -t iso9660 -o loop $ISO $ROOTFS/ >/dev/null 2>&1
# create directory, unpack squashfs filesystem, get ISO version
# and unmount ISO
echo "I: extracting squashfs content"
unsquashfs -follow -dest $UNSQUASHFS/ $ROOTFS/live/filesystem.squashfs >/dev/null 2>&1
VERSION=$(jq --raw-output .version $ROOTFS/version.json)
umount $ROOTFS/
# fix locales for correct system configuration loading
sed -i 's/^LANG=.*$/LANG=C.UTF-8/' $UNSQUASHFS/etc/default/locale
# optional step: Decrease docker image size by deleting not necessary files for container
rm -rf $UNSQUASHFS/boot/*.img
rm -rf $UNSQUASHFS/boot/*vyos*
rm -rf $UNSQUASHFS/boot/vmlinuz
rm -rf $UNSQUASHFS/lib/firmware/
rm -rf $UNSQUASHFS/usr/lib/x86_64-linux-gnu/libwireshark.so*
rm -rf $UNSQUASHFS/lib/modules/*amd64-vyos
rm -rf $UNSQUASHFS/root/.gnupg
# create a symbolic link to the configuration
ln -s /opt/vyatta/etc/config $UNSQUASHFS/config
# create docker image
echo "I: generate OCI container image vyos-$VERSION.tar"
tar -C unsquashfs -c . -f vyos-$VERSION.tar
echo "I: to import the previously generated OCI image to your local images run:"
echo ""
echo " docker import vyos-$VERSION.tar vyos:$VERSION --change 'CMD ["/sbin/init"]'"
echo ""
cleanup