106 lines
2.4 KiB
Bash
Executable file
106 lines
2.4 KiB
Bash
Executable file
#!/bin/sh
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if [ $# -ne 1 ]; then
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echo "$0 ssh-keyfile"
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echo " ssh-keyfile: ssh keys to add into the image"
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exit 1
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fi
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set -e
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set -x
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SSH_KEYS=$1; shift
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MAJOR_VERSION=3.13
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MINOR_VERSION=5
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IMAGE=alpine-minirootfs-$MAJOR_VERSION.$MINOR_VERSION-x86_64.tar.gz
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RESOLVCONF=/etc/resolv.conf
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working_directory=$(pwd -P)
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#rootfs_tmpdir=$(mktemp -d)
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rootfs_tmpdir=alpine_${MAJOR_VERSION}-${MINOR_VERSION}-rootfs
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initramfs="$working_directory/initramfs-alpine-${MAJOR_VERSION}.${MINOR_VERSION}"
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kernel="$working_directory/kernel-alpine-${MAJOR_VERSION}.${MINOR_VERSION}"
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mkdir -p ${rootfs_tmpdir}
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rootfs_url="http://dl-cdn.alpinelinux.org/alpine/v$MAJOR_VERSION/releases/x86_64/$IMAGE"
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run_root () {
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sudo chroot $rootfs_tmpdir /usr/bin/env \
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PATH=/bin:/sbin \
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/bin/sh -c "$*"
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}
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wget -c "$rootfs_url" -O "$IMAGE"
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# keep right permissions, use sudo
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sudo tar xf $IMAGE -C $rootfs_tmpdir
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# Add SSH keys
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run_root mkdir -p root/.ssh
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sudo cp $SSH_KEYS $rootfs_tmpdir/root/.ssh/authorized_keys
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run_root chown root:root /root/.ssh/authorized_keys
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run_root chmod 0600 /root/.ssh/authorized_keys
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run_root chmod 0700 /root/.ssh
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# Import local resolv.conf.
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sudo cp "$RESOLVCONF" $rootfs_tmpdir/etc/resolv.conf
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# Make sure init is found by the kernel.
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run_root ln -sf /sbin/init /init
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run_root apk update
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run_root apk add linux-lts openrc udev openssh rdnssd
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# rdnssd
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run_root rc-update add udev
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run_root rc-update add udev-trigger
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run_root rc-update add sshd
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run_root rc-update add rdnssd
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run_root rc-update add networking
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run_root rc-update add hostname
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run_root sed -i 's/root:!::0:::::/root:*::0:::::/' /etc/shadow
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# Fix not yet updated initscript for rdnssd
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sudo tee "$rootfs_tmpdir/etc/init.d/rdnssd" <<EOF
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#!/sbin/openrc-run
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supervisor=supervise-daemon
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command=/usr/sbin/rdnssd
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command_args="-H /etc/rdnssd/resolvconf"
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command_args_foreground="-f"
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start_pre() {
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checkpath -d -m 0755 -o nobody:nobody -q /run/rdnssd
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}
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EOF
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sudo tee "$rootfs_tmpdir/etc/network/interfaces" <<EOF
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auto lo
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iface lo inet loopback
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auto eth0
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iface eth0 inet6 manual
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up /sbin/ip link set \$IFACE up
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EOF
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sudo tee "$rootfs_tmpdir/etc/hostname" <<EOF
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alpine-unconfigured
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EOF
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# Cleanup resolv.conf
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run_root rm -f /etc/resolv.conf
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# Generate iniramfs image
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(cd $rootfs_tmpdir; sudo find . | sudo cpio -H newc -o | gzip -9 > ${initramfs})
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cp "$rootfs_tmpdir/boot/vmlinuz-lts" "${kernel}"
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echo rm -rf "$rootfs_tmpdir"
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echo "Use ${initramfs} and ${kernel} from $working_directory"!
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exit 0
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