Import alpine building script from Timothee

This commit is contained in:
Nico Schottelius 2019-11-30 23:43:21 +01:00
parent 7656306224
commit 00fc553026

59
alpine-rebuild-initramfs.sh Executable file
View file

@ -0,0 +1,59 @@
#!/bin/sh
set -e
set -x
MAJOR_VERSION=3.10
MINOR_VERSION=3
IMAGE=alpine-minirootfs-$MAJOR_VERSION.$MINOR_VERSION-x86_64.tar.gz
SSH_KEYS=$(cat ~/.ssh/id_rsa.pub)
RESOLVCONF=/etc/resolv.conf
working_directory=$(dirname $0)
rootfs_tmpdir=$(mktemp -d)
rootfs_url="http://dl-cdn.alpinelinux.org/alpine/v$MAJOR_VERSION/releases/x86_64/$IMAGE"
run_root () {
chroot $rootfs_tmpdir /usr/bin/env \
PATH=/bin:/sbin \
/bin/sh -c "$*"
}
if [ "$(whoami)" != 'root' ]; then
echo "This script must be run as root." >&2
exit 1
fi
# Download, extract inital rootfs.
curl "$rootfs_url" -o "$working_directory/$IMAGE"
tar xf $IMAGE -C $rootfs_tmpdir
# Add SSH keys
run_root mkdir root/.ssh
echo $SSH_KEYS > $rootfs_tmpdir/root/.ssh/authorized_keys
run_root chmod 0600 root/.ssh/authorized_keys
run_root chmod 0700 root/.ssh
# Import local resolv.conf.
cat $RESOLVCONF > $rootfs_tmpdir/etc/resolv.conf
# Make sure init is found by the kernel.
run_root ln -s /sbin/init /init
# Layer atop base rootfs.
run_root apk update
run_root apk upgrade
run_root apk add openssh linux-vanilla openrc udev
run_root rc-update add udev
run_root rc-update add sshd
# Generate iniramfs image
(cd $rootfs_tmpdir; find . | cpio -H newc -o | gzip -9 > "$working_directory/alpine-initramfs.gz")
cp $rootfs_tmpdir/boot/vmlinuz-vanilla "$working_directory/alpine-kernel"
# Upload to netboot server.
scp alpine-initramfs.gz alpine-kernel root@netboot.hack4glarus.ungleich.cloud:/var/www/html/
# Cleanup.
rm -r $rootfs_tmpdir
(cd "$working_directory/"; rm vmlinuz-vanilla alpine-kernel $IMAGE)