Alpine Linuxをsystemd-nspawnで動かす

mkalpinecontainer

#!/bin/bash

MIRROR=http://ftp.tsukuba.wide.ad.jp/Linux/alpine
VERSION=edge

if [ $UID -ne 0 ]; then
	echo "rootじゃなきゃやだ" >&2
	exit 1
fi

if [ -z "$1" ]; then
	echo "$0 フォルダ名" >&2
	exit 0
fi

dest="$1"
apkdir=$(mktemp -d)
arch="$(uname -m)"
apktools_version=$(curl -s $MIRROR/$VERSION/main/$arch/ | awk -F'=' 'match($0, /href="apk-tools-static-(.*).apk">/, a) {print a[1]}')

wget -O - $MIRROR/$VERSION/main/$arch/apk-tools-static-$apktools_version.apk \
	| tar -xz -C $apkdir || \
	{ echo "Couldn't download apk-tools, the version might have changed..."; exit 1; }

$apkdir/sbin/apk.static \
	-X $MIRROR/$VERSION/main -U --arch $arch \
	--allow-untrusted --root "$dest" \
	--initdb add alpine-base

mkdir -p "$dest"/{etc/apk,root}
cat /etc/resolv.conf >"$dest"/etc/resolv.conf
printf '%s/%s/main\n' $MIRROR $VERSION >"$dest"/etc/apk/repositories
sed '/tty[0-9]:/ s/^/#/' -i "$dest"/etc/inittab
printf 'console::respawn:/sbin/getty 38400 console\n' >>"$dest"/etc/inittab
for s in hostname bootmisc syslog; do
	ln -s /etc/init.d/$s "$dest"/etc/runlevels/boot/$s
done
for s in killprocs savecache; do
	ln -s /etc/init.d/$s "$dest"/etc/runlevels/shutdown/$s
done

rm -r $apkdir
echo ""
echo "だん！"