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#!/usr/bin/env bash
#
# Create a base CentOS Docker image.
#
# This script is useful on systems with yum installed (e.g., building
# a CentOS image on CentOS). See contrib/mkimage-rinse.sh for a way
# to build CentOS images on other systems.
usage() {
cat <<EOOPTS
$(basename $0) [OPTIONS] <name>
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))
name=$1
if [[ -z $name ]]; then
usage
fi
target=$(mktemp -d --tmpdir $(basename $0).XXXXXX)
set -x
mkdir -m 755 "$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
# amazon linux yum will fail without vars set
if [ -d /etc/yum/vars ]; then
mkdir -p -m 755 "$target"/etc/yum
cp -a /etc/yum/vars "$target"/etc/yum/
fi
yum -c "$yum_config" --installroot="$target" --releasever=/ --setopt=tsflags=nodocs \
--setopt=group_package_types=mandatory -y groupinstall Core
yum -c "$yum_config" --installroot="$target" -y clean all
cat > "$target"/etc/sysconfig/network <<EOF
NETWORKING=yes
HOSTNAME=localhost.localdomain
EOF
# effectively: febootstrap-minimize --keep-zoneinfo --keep-rpmdb --keep-services "$target".
# locales
rm -rf "$target"/usr/{{lib,share}/locale,{lib,lib64}/gconv,bin/localedef,sbin/build-locale-archive}
# docs and man pages
rm -rf "$target"/usr/share/{man,doc,info,gnome/help}
# cracklib
rm -rf "$target"/usr/share/cracklib
# i18n
rm -rf "$target"/usr/share/i18n
# yum cache
rm -rf "$target"/var/cache/yum
mkdir -p --mode=0755 "$target"/var/cache/yum
# sln
rm -rf "$target"/sbin/sln
# ldconfig
rm -rf "$target"/etc/ld.so.cache "$target"/var/cache/ldconfig
mkdir -p --mode=0755 "$target"/var/cache/ldconfig
version=
for file in "$target"/etc/{redhat,system}-release
do
if [ -r "$file" ]; then
version="$(sed 's/^[^0-9\]*\([0-9.]\+\).*$/\1/' "$file")"
break
fi
done
if [ -z "$version" ]; then
echo >&2 "warning: cannot autodetect OS version, using '$name' as tag"
version=$name
fi
echo "$version" > "$target"/etc/yum/vars/releasever
if [ -e "$target"/etc/yum.repos.d/fedora.repo ]; then
sed -i "s|^#baseurl=.*|baseurl=http://dl.fedoraproject.org/pub/fedora-secondary/releases/23/Everything/aarch64/os/|" "$target"/etc/yum.repos.d/fedora.repo
sed -i '/^metalink=/s/^/#/g' "$target"/etc/yum.repos.d/fedora.repo
fi
if [ -e "$target"/etc/yum.repos.d/fedora-updates.repo ]; then
sed -i "s|^#baseurl=.*|baseurl=http://dl.fedoraproject.org/pub/fedora-secondary/updates/23/aarch64/|" "$target"/etc/yum.repos.d/fedora-updates.repo
sed -i '/^metalink=/s/^/#/g' "$target"/etc/yum.repos.d/fedora-updates.repo
fi
tar --numeric-owner -c -C "$target" . | docker import - $name:$version
docker run -i -t $name:$version echo success
rm -rf "$target"
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