103 lines
2.7 KiB
Bash
Executable file
103 lines
2.7 KiB
Bash
Executable file
#!/bin/bash
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# This is the code extracted from /usr/share/lxc/templates/lxc-ubuntu
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# that comes with Ubuntu 12.10 which is responsible for downloading the
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# rootfs files / packages
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set -e
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suggest_flush()
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{
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echo "Container upgrade failed. The container cache may be out of date,"
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echo "in which case flushing the case (see -F in the hep output) may help."
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}
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cleanup()
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{
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rm -rf $cache/partial
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rm -rf $cache/rootfs
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}
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write_sourceslist()
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{
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# $1 => path to the rootfs
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MIRROR=${MIRROR:-http://archive.ubuntu.com/ubuntu}
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SECURITY_MIRROR=${SECURITY_MIRROR:-http://security.ubuntu.com/ubuntu}
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cat >> "$1/etc/apt/sources.list" << EOF
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deb $MIRROR ${release} main restricted universe multiverse
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deb $MIRROR ${release}-updates main restricted universe multiverse
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deb $SECURITY_MIRROR ${release}-security main restricted universe multiverse
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EOF
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}
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download_ubuntu()
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{
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packages=vim,ssh,curl,wget,bash-completion,manpages,man-db,psmisc
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echo "installing packages: $packages"
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trap cleanup EXIT SIGHUP SIGINT SIGTERM
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# check the mini ubuntu was not already downloaded
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mkdir -p "$cache/partial"
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if [ $? -ne 0 ]; then
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echo "Failed to create '$cache/partial' directory"
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return 1
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fi
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# download a mini ubuntu into a cache
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echo "Downloading ubuntu $release minimal ..."
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if [ -n "$(which qemu-debootstrap)" ]; then
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qemu-debootstrap --verbose --components=main,universe --arch=$arch --include=$packages $release $cache/partial $MIRROR
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else
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debootstrap --verbose --components=main,universe --arch=$arch --include=$packages $release $cache/partial $MIRROR
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fi
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if [ $? -ne 0 ]; then
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echo "Failed to download the rootfs, aborting."
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return 1
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fi
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# Serge isn't sure whether we should avoid doing this when
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# $release == `distro-info -d`
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echo "Installing updates"
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> $cache/partial/etc/apt/sources.list
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write_sourceslist $cache/partial/ $arch
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chroot "$1/partial" apt-get update
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if [ $? -ne 0 ]; then
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echo "Failed to update the apt cache"
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return 1
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fi
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cat > "$1/partial"/usr/sbin/policy-rc.d << EOF
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#!/bin/sh
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exit 101
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EOF
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chmod +x "$1/partial"/usr/sbin/policy-rc.d
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lxc-unshare -s MOUNT -- chroot "$1/partial" apt-get dist-upgrade -y || { suggest_flush; false; }
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rm -f "$1/partial"/usr/sbin/policy-rc.d
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chroot "$1/partial" apt-get clean
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mv "$1/partial" "$1/rootfs"
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trap EXIT
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trap SIGINT
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trap SIGTERM
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trap SIGHUP
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echo "Download complete"
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return 0
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}
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declare cache=`readlink -f .` \
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arch=$1 \
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release=$2
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if [ -d "${cache}/rootfs" ]; then
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echo 'The rootfs cache has been built already, please remove it if you want to update'
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exit 1
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fi
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download_ubuntu $cache $arch $release
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