docker/contrib/mkimage-rinse.sh

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#!/usr/bin/env bash
#
# Create a base CentOS Docker image.
# This script is useful on systems with rinse available (e.g.,
# building a CentOS image on Debian). See contrib/mkimage-yum.sh for
# a way to build CentOS images on systems with yum installed.
set -e
repo="$1"
distro="$2"
mirror="$3"
if [ ! "$repo" ] || [ ! "$distro" ]; then
self="$(basename $0)"
echo >&2 "usage: $self repo distro [mirror]"
echo >&2
echo >&2 " ie: $self username/centos centos-5"
echo >&2 " $self username/centos centos-6"
echo >&2
echo >&2 " ie: $self username/slc slc-5"
echo >&2 " $self username/slc slc-6"
echo >&2
echo >&2 " ie: $self username/centos centos-5 http://vault.centos.org/5.8/os/x86_64/CentOS/"
echo >&2 " $self username/centos centos-6 http://vault.centos.org/6.3/os/x86_64/Packages/"
echo >&2
echo >&2 'See /etc/rinse for supported values of "distro" and for examples of'
echo >&2 ' expected values of "mirror".'
echo >&2
echo >&2 'This script is tested to work with the original upstream version of rinse,'
echo >&2 ' found at http://www.steve.org.uk/Software/rinse/ and also in Debian at'
echo >&2 ' http://packages.debian.org/wheezy/rinse -- as always, YMMV.'
echo >&2
exit 1
fi
target="/tmp/docker-rootfs-rinse-$distro-$$-$RANDOM"
cd "$(dirname "$(readlink -f "$BASH_SOURCE")")"
returnTo="$(pwd -P)"
rinseArgs=( --arch amd64 --distribution "$distro" --directory "$target" )
if [ "$mirror" ]; then
rinseArgs+=( --mirror "$mirror" )
fi
set -x
mkdir -p "$target"
sudo rinse "${rinseArgs[@]}"
cd "$target"
# rinse fails a little at setting up /dev, so we'll just wipe it out and create our own
sudo rm -rf dev
sudo mkdir -m 755 dev
(
cd dev
sudo ln -sf /proc/self/fd ./
sudo mkdir -m 755 pts
sudo mkdir -m 1777 shm
sudo mknod -m 600 console c 5 1
sudo mknod -m 600 initctl p
sudo mknod -m 666 full c 1 7
sudo mknod -m 666 null c 1 3
sudo mknod -m 666 ptmx c 5 2
sudo mknod -m 666 random c 1 8
sudo mknod -m 666 tty c 5 0
sudo mknod -m 666 tty0 c 4 0
sudo mknod -m 666 urandom c 1 9
sudo mknod -m 666 zero c 1 5
)
# effectively: febootstrap-minimize --keep-zoneinfo --keep-rpmdb --keep-services "$target"
# locales
sudo rm -rf usr/{{lib,share}/locale,{lib,lib64}/gconv,bin/localedef,sbin/build-locale-archive}
# docs
sudo rm -rf usr/share/{man,doc,info,gnome/help}
# cracklib
sudo rm -rf usr/share/cracklib
# i18n
sudo rm -rf usr/share/i18n
# yum cache
sudo rm -rf var/cache/yum
sudo mkdir -p --mode=0755 var/cache/yum
# sln
sudo rm -rf sbin/sln
# ldconfig
#sudo rm -rf sbin/ldconfig
sudo rm -rf etc/ld.so.cache var/cache/ldconfig
sudo mkdir -p --mode=0755 var/cache/ldconfig
# allow networking init scripts inside the container to work without extra steps
echo 'NETWORKING=yes' | sudo tee etc/sysconfig/network > /dev/null
# to restore locales later:
# yum reinstall glibc-common
version=
if [ -r etc/redhat-release ]; then
version="$(sed -E 's/^[^0-9.]*([0-9.]+).*$/\1/' etc/redhat-release)"
elif [ -r etc/SuSE-release ]; then
version="$(awk '/^VERSION/ { print $3 }' etc/SuSE-release)"
fi
if [ -z "$version" ]; then
echo >&2 "warning: cannot autodetect OS version, using $distro as tag"
sleep 20
version="$distro"
fi
sudo tar --numeric-owner -c . | docker import - $repo:$version
docker run -i -t $repo:$version echo success
cd "$returnTo"
sudo rm -rf "$target"