mirror of https://github.com/docker/docs.git
76 lines
1.8 KiB
Bash
Executable File
76 lines
1.8 KiB
Bash
Executable File
#!/usr/bin/env bash
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# Generate a minimal filesystem for CRUX/Linux and load it into the local
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# docker as "cruxlinux"
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# requires root and the crux iso (http://crux.nu)
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set -e
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die () {
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echo >&2 "$@"
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exit 1
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}
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[ "$#" -eq 1 ] || die "1 argument(s) required, $# provided. Usage: ./mkimage-crux.sh /path/to/iso"
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ISO=${1}
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ROOTFS=$(mktemp -d /tmp/rootfs-crux-XXXXXXXXXX)
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CRUX=$(mktemp -d /tmp/crux-XXXXXXXXXX)
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TMP=$(mktemp -d /tmp/XXXXXXXXXX)
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VERSION=$(basename --suffix=.iso $ISO | sed 's/[^0-9.]*\([0-9.]*\).*/\1/')
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# Mount the ISO
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mount -o ro,loop $ISO $CRUX
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# Extract pkgutils
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tar -C $TMP -xf $CRUX/tools/pkgutils#*.pkg.tar.gz
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# Put pkgadd in the $PATH
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export PATH="$TMP/usr/bin:$PATH"
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# Install core packages
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mkdir -p $ROOTFS/var/lib/pkg
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touch $ROOTFS/var/lib/pkg/db
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for pkg in $CRUX/crux/core/*; do
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pkgadd -r $ROOTFS $pkg
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done
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# Remove agetty and inittab config
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if (grep agetty ${ROOTFS}/etc/inittab 2>&1 > /dev/null); then
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echo "Removing agetty from /etc/inittab ..."
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chroot ${ROOTFS} sed -i -e "/agetty/d" /etc/inittab
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chroot ${ROOTFS} sed -i -e "/shutdown/d" /etc/inittab
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chroot ${ROOTFS} sed -i -e "/^$/N;/^\n$/d" /etc/inittab
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fi
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# Remove kernel source
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rm -rf $ROOTFS/usr/src/*
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# udev doesn't work in containers, rebuild /dev
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DEV=$ROOTFS/dev
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rm -rf $DEV
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mkdir -p $DEV
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mknod -m 666 $DEV/null c 1 3
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mknod -m 666 $DEV/zero c 1 5
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mknod -m 666 $DEV/random c 1 8
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mknod -m 666 $DEV/urandom c 1 9
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mkdir -m 755 $DEV/pts
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mkdir -m 1777 $DEV/shm
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mknod -m 666 $DEV/tty c 5 0
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mknod -m 600 $DEV/console c 5 1
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mknod -m 666 $DEV/tty0 c 4 0
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mknod -m 666 $DEV/full c 1 7
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mknod -m 600 $DEV/initctl p
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mknod -m 666 $DEV/ptmx c 5 2
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IMAGE_ID=$(tar --numeric-owner -C $ROOTFS -c . | docker import - crux:$VERSION)
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docker tag $IMAGE_ID crux:latest
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docker run -i -t crux echo Success.
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# Cleanup
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umount $CRUX
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rm -rf $ROOTFS
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rm -rf $CRUX
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rm -rf $TMP
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