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|
#!/usr/bin/env bash
set -e
variant='minbase'
include='iproute,iputils-ping'
arch='amd64' # intentionally undocumented for now
skipDetection=
strictDebootstrap=
justTar=
usage() {
echo >&2
echo >&2 "usage: $0 [options] repo suite [mirror]"
echo >&2
echo >&2 'options: (not recommended)'
echo >&2 " -p set an http_proxy for debootstrap"
echo >&2 " -v $variant # change default debootstrap variant"
echo >&2 " -i $include # change default package includes"
echo >&2 " -d # strict debootstrap (do not apply any docker-specific tweaks)"
echo >&2 " -s # skip version detection and tagging (ie, precise also tagged as 12.04)"
echo >&2 " # note that this will also skip adding universe and/or security/updates to sources.list"
echo >&2 " -t # just create a tarball, especially for dockerbrew (uses repo as tarball name)"
echo >&2
echo >&2 " ie: $0 username/debian squeeze"
echo >&2 " $0 username/debian squeeze http://ftp.uk.debian.org/debian/"
echo >&2
echo >&2 " ie: $0 username/ubuntu precise"
echo >&2 " $0 username/ubuntu precise http://mirrors.melbourne.co.uk/ubuntu/"
echo >&2
echo >&2 " ie: $0 -t precise.tar.bz2 precise"
echo >&2 " $0 -t wheezy.tgz wheezy"
echo >&2 " $0 -t wheezy-uk.tar.xz wheezy http://ftp.uk.debian.org/debian/"
echo >&2
}
# these should match the names found at http://www.debian.org/releases/
debianStable=wheezy
debianUnstable=sid
# this should match the name found at http://releases.ubuntu.com/
ubuntuLatestLTS=precise
# this should match the name found at http://releases.tanglu.org/
tangluLatest=aequorea
while getopts v:i:a:p:dst name; do
case "$name" in
p)
http_proxy="$OPTARG"
;;
v)
variant="$OPTARG"
;;
i)
include="$OPTARG"
;;
a)
arch="$OPTARG"
;;
d)
strictDebootstrap=1
;;
s)
skipDetection=1
;;
t)
justTar=1
;;
?)
usage
exit 0
;;
esac
done
shift $(($OPTIND - 1))
repo="$1"
suite="$2"
mirror="${3:-}" # stick to the default debootstrap mirror if one is not provided
if [ ! "$repo" ] || [ ! "$suite" ]; then
usage
exit 1
fi
# some rudimentary detection for whether we need to "sudo" our docker calls
docker=''
if docker version > /dev/null 2>&1; then
docker='docker'
elif sudo docker version > /dev/null 2>&1; then
docker='sudo docker'
elif command -v docker > /dev/null 2>&1; then
docker='docker'
else
echo >&2 "warning: either docker isn't installed, or your current user cannot run it;"
echo >&2 " this script is not likely to work as expected"
sleep 3
docker='docker' # give us a command-not-found later
fi
# make sure we have an absolute path to our final tarball so we can still reference it properly after we change directory
if [ "$justTar" ]; then
if [ ! -d "$(dirname "$repo")" ]; then
echo >&2 "error: $(dirname "$repo") does not exist"
exit 1
fi
repo="$(cd "$(dirname "$repo")" && pwd -P)/$(basename "$repo")"
fi
# will be filled in later, if [ -z "$skipDetection" ]
lsbDist=''
target="/tmp/docker-rootfs-debootstrap-$suite-$$-$RANDOM"
cd "$(dirname "$(readlink -f "$BASH_SOURCE")")"
returnTo="$(pwd -P)"
if [ "$suite" = 'lucid' ]; then
# lucid fails and doesn't include gpgv in minbase; "apt-get update" fails
include+=',gpgv'
fi
set -x
# bootstrap
mkdir -p "$target"
sudo http_proxy=$http_proxy debootstrap --verbose --variant="$variant" --include="$include" --arch="$arch" "$suite" "$target" "$mirror"
cd "$target"
if [ -z "$strictDebootstrap" ]; then
# prevent init scripts from running during install/update
# policy-rc.d (for most scripts)
echo $'#!/bin/sh\nexit 101' | sudo tee usr/sbin/policy-rc.d > /dev/null
sudo chmod +x usr/sbin/policy-rc.d
# initctl (for some pesky upstart scripts)
sudo chroot . dpkg-divert --local --rename --add /sbin/initctl
sudo ln -sf /bin/true sbin/initctl
# see https://github.com/dotcloud/docker/issues/446#issuecomment-16953173
# shrink the image, since apt makes us fat (wheezy: ~157.5MB vs ~120MB)
sudo chroot . apt-get clean
if strings usr/bin/dpkg | grep -q unsafe-io; then
# while we're at it, apt is unnecessarily slow inside containers
# this forces dpkg not to call sync() after package extraction and speeds up install
# the benefit is huge on spinning disks, and the penalty is nonexistent on SSD or decent server virtualization
echo 'force-unsafe-io' | sudo tee etc/dpkg/dpkg.cfg.d/02apt-speedup > /dev/null
# we have this wrapped up in an "if" because the "force-unsafe-io"
# option was added in dpkg 1.15.8.6
# (see http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=584254#82),
# and ubuntu lucid/10.04 only has 1.15.5.6
fi
# we want to effectively run "apt-get clean" after every install to keep images small (see output of "apt-get clean -s" for context)
{
aptGetClean='"rm -f /var/cache/apt/archives/*.deb /var/cache/apt/archives/partial/*.deb /var/cache/apt/*.bin || true";'
echo "DPkg::Post-Invoke { ${aptGetClean} };"
echo "APT::Update::Post-Invoke { ${aptGetClean} };"
echo 'Dir::Cache::pkgcache ""; Dir::Cache::srcpkgcache "";'
} | sudo tee etc/apt/apt.conf.d/no-cache > /dev/null
# and remove the translations, too
echo 'Acquire::Languages "none";' | sudo tee etc/apt/apt.conf.d/no-languages > /dev/null
# helpful undo lines for each the above tweaks (for lack of a better home to keep track of them):
# rm /usr/sbin/policy-rc.d
# rm /sbin/initctl; dpkg-divert --rename --remove /sbin/initctl
# rm /etc/dpkg/dpkg.cfg.d/02apt-speedup
# rm /etc/apt/apt.conf.d/no-cache
# rm /etc/apt/apt.conf.d/no-languages
if [ -z "$skipDetection" ]; then
# see also rudimentary platform detection in hack/install.sh
lsbDist=''
if [ -r etc/lsb-release ]; then
lsbDist="$(. etc/lsb-release && echo "$DISTRIB_ID")"
fi
if [ -z "$lsbDist" ] && [ -r etc/debian_version ]; then
lsbDist='Debian'
fi
case "$lsbDist" in
Debian)
# add the updates and security repositories
if [ "$suite" != "$debianUnstable" -a "$suite" != 'unstable' ]; then
# ${suite}-updates only applies to non-unstable
sudo sed -i "p; s/ $suite main$/ ${suite}-updates main/" etc/apt/sources.list
# same for security updates
echo "deb http://security.debian.org/ $suite/updates main" | sudo tee -a etc/apt/sources.list > /dev/null
fi
;;
Ubuntu)
# add the universe, updates, and security repositories
sudo sed -i "
s/ $suite main$/ $suite main universe/; p;
s/ $suite main/ ${suite}-updates main/; p;
s/ $suite-updates main/ ${suite}-security main/
" etc/apt/sources.list
;;
Tanglu)
# add the updates repository
if [ "$suite" = "$tangluLatest" ]; then
# ${suite}-updates only applies to stable Tanglu versions
sudo sed -i "p; s/ $suite main$/ ${suite}-updates main/" etc/apt/sources.list
fi
;;
SteamOS)
# add contrib and non-free
sudo sed -i "s/ $suite main$/ $suite main contrib non-free/" etc/apt/sources.list
;;
esac
fi
# make sure our packages lists are as up to date as we can get them
sudo chroot . apt-get update
sudo chroot . apt-get dist-upgrade -y
fi
if [ "$justTar" ]; then
# create the tarball file so it has the right permissions (ie, not root)
touch "$repo"
# fill the tarball
sudo tar --numeric-owner -caf "$repo" .
else
# create the image (and tag $repo:$suite)
sudo tar --numeric-owner -c . | $docker import - $repo:$suite
# test the image
$docker run -i -t $repo:$suite echo success
if [ -z "$skipDetection" ]; then
case "$lsbDist" in
Debian)
if [ "$suite" = "$debianStable" -o "$suite" = 'stable' ] && [ -r etc/debian_version ]; then
# tag latest
$docker tag $repo:$suite $repo:latest
if [ -r etc/debian_version ]; then
# tag the specific debian release version (which is only reasonable to tag on debian stable)
ver=$(cat etc/debian_version)
$docker tag $repo:$suite $repo:$ver
fi
fi
;;
Ubuntu)
if [ "$suite" = "$ubuntuLatestLTS" ]; then
# tag latest
$docker tag $repo:$suite $repo:latest
fi
if [ -r etc/lsb-release ]; then
lsbRelease="$(. etc/lsb-release && echo "$DISTRIB_RELEASE")"
if [ "$lsbRelease" ]; then
# tag specific Ubuntu version number, if available (12.04, etc.)
$docker tag $repo:$suite $repo:$lsbRelease
fi
fi
;;
Tanglu)
if [ "$suite" = "$tangluLatest" ]; then
# tag latest
$docker tag $repo:$suite $repo:latest
fi
if [ -r etc/lsb-release ]; then
lsbRelease="$(. etc/lsb-release && echo "$DISTRIB_RELEASE")"
if [ "$lsbRelease" ]; then
# tag specific Tanglu version number, if available (1.0, 2.0, etc.)
$docker tag $repo:$suite $repo:$lsbRelease
fi
fi
;;
SteamOS)
if [ -r etc/lsb-release ]; then
lsbRelease="$(. etc/lsb-release && echo "$DISTRIB_RELEASE")"
if [ "$lsbRelease" ]; then
# tag specific SteamOS version number, if available (1.0, 2.0, etc.)
$docker tag $repo:$suite $repo:$lsbRelease
fi
fi
;;
esac
fi
fi
# cleanup
cd "$returnTo"
sudo rm -rf "$target"
|
