Script for building CentOS 3 i386 docker image

mkimage-yum.sh

#!/usr/bin/env bash
#
# Create a base CentOS 3 Docker image.
#
# This script is useful on systems with yum installed (e.g., building
# a CentOS 3 image on CentOS 3). It is taken from
# https://github.com/docker/docker/blob/master/contrib/mkimage-yum.sh
# and modified for CentOS 3

usage() {
    cat <<EOOPTS
$(basename $0) [OPTIONS]
OPTIONS:
  -y <yumconf>  The path to the yum config to install packages from. The
                default is /etc/yum.conf.
EOOPTS
    exit 1
}

# option defaults
yum_config=/etc/yum.conf
while getopts ":y:h" opt; do
    case $opt in
        y)
            yum_config=$OPTARG
            ;;
        h)
            usage
            ;;
        \?)
            echo "Invalid option: -$OPTARG"
            usage
            ;;
    esac
done
shift $((OPTIND - 1))

#--------------------

target=$(mktemp -d /tmp/$(basename $0).XXXXXX)
#target="/tmp/$(basename $0)"

mkdir -p "$target/var/lib/rpm"
#rpm --initdb --dbpath "$target/var/lib/rpm"
rpm --import --dbpath "$target/var/lib/rpm" http://vault.centos.org/3.9/os/i386/RPM-GPG-KEY
rpm --import --dbpath "$target/var/lib/rpm" http://vault.centos.org/3.9/os/i386/RPM-GPG-KEY-CentOS-3

set -x

mkdir -m 755 "$target"/dev
mknod -m 600 "$target"/dev/console c 5 1
mknod -m 600 "$target"/dev/initctl p
mknod -m 666 "$target"/dev/full c 1 7
mknod -m 666 "$target"/dev/null c 1 3
mknod -m 666 "$target"/dev/ptmx c 5 2
mknod -m 666 "$target"/dev/random c 1 8
mknod -m 666 "$target"/dev/tty c 5 0
mknod -m 666 "$target"/dev/tty0 c 4 0
mknod -m 666 "$target"/dev/urandom c 1 9
mknod -m 666 "$target"/dev/zero c 1 5

yum -c "$yum_config" --installroot="$target" -y groupinstall Core
yum -c "$yum_config" --installroot="$target" -y clean all

cp -f "$yum_config" "$target/etc/"
rpm --rebuilddb --dbpath "$target/var/lib/rpm"

cat > "$target"/etc/sysconfig/network <<EOF
NETWORKING=yes
HOSTNAME=localhost.localdomain
EOF

# effectively: febootstrap-minimize --keep-zoneinfo --keep-rpmdb
# --keep-services "$target".  Stolen from mkimage-rinse.sh
#  locales
rm -rf "$target"/usr/{{lib,share}/locale,{lib,lib64}/gconv,bin/localedef,sbin/build-locale-archive}
#  docs
rm -rf "$target"/usr/share/{man,doc,info,gnome/help}
#  cracklib
rm -rf "$target"/usr/share/cracklib
#  i18n
rm -rf "$target"/usr/share/i18n
#  sln
rm -rf "$target"/sbin/sln
##  ldconfig
#rm -rf "$target"/etc/ld.so.cache
#rm -rf "$target"/var/cache/ldconfig/*

version=

tar --numeric-owner -czf os_image.tar.gz -C "$target" .
rm -rf "$target"

It generates os_image.tar.gz file for docker import command

Does this work for building CentOS 3.3? When I try to install the Base group, yum complains that it can't find any groups.