144 lines
4.0 KiB
Bash
Executable File
144 lines
4.0 KiB
Bash
Executable File
#!/bin/sh
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# - builds a generic image from a stage3 tarball and portage snapshot
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# - creates and uploads AMI
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#
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# based on work from JD Harrington https://github.com/psi/gentoo-aws
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# and Matsuu Takuto https://gist.github.com/870789
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#===============================================================================
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GENTOO_MIRROR="http://gentoo.arcticnetwork.ca"
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LOCAL_CACHE=/var/tmp
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set -x
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die() {
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echo $@
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exit 1
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}
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fetch_file() {
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local URL=$1
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local DIGEST=$2
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FILE_NAME=$(basename ${URL})
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MD5=$(curl -s -S ${DIGEST} | grep -o -E -e "^[0-9a-f]{32}\s*${FILE_NAME}$" | awk '{print $1}')
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if [ -z ${MD5} ]; then
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die "Unable to get checksum for ${FILE_NAME}, abort"
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fi
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# Do we have local copy
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if [ -f ${LOCAL_CACHE}/${FILE_NAME} ]; then
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# if we have local, correct copy use it
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if [ $(md5sum ${LOCAL_CACHE}/${FILE_NAME} | awk '{print $1}') = ${MD5} ]; then
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cp ${LOCAL_CACHE}/${FILE_NAME} .
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return
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else
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echo "Invalid checksum for ${LOCAL_CACHE}/${FILE_NAME}, downloading new copy..."
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fi
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fi
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wget -nc ${URL} || die "Cannot download ${URL}!"
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if [ $(md5sum ${FILE_NAME} | awk '{print $1}') != ${MD5} ]; then
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die "Invalid checksum for ${FILE_NAME}!"
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fi
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# Check if local cache is usable
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if [ -d ${LOCAL_CACHE} ] && [ -w ${LOCAL_CACHE} ]; then
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cp ${FILE_NAME} ${LOCAL_CACHE}
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echo "Stored ${FILE_NAME} in local cache."
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fi
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}
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# bootstrap ROOT_FS PROFILE ARCH
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bootstrap() {
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local ROOT_FS=$1
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local PROFILE=$2
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local ARCH=$3
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local STAGE_PATH
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local STAGE_ARCH
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local LATEST_STAGE_FILE
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local ESELECT_PROFILE
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if [ "${ARCH}" = "i686" ] ; then
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STAGE_ARCH=${ARCH}
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# Why do they use x86 here ? :(
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STAGE_PATH="${GENTOO_MIRROR}/releases/x86/autobuilds"
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elif [ "${ARCH}" = "x86_64" ] ; then
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STAGE_ARCH="amd64"
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STAGE_PATH="${GENTOO_MIRROR}/releases/${STAGE_ARCH}/autobuilds"
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else
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die "Unknown architecture!"
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fi
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if [ "${PROFILE}" = "hardened" ] ; then
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LATEST_STAGE_FILE="${STAGE_PATH}/latest-stage3-${STAGE_ARCH}-hardened.txt"
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ESELECT_PROFILE="hardened/linux/${ARCH}"
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elif [ "${PROFILE}" = "hardened-no-multilib" ] ; then
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LATEST_STAGE_FILE="${STAGE_PATH}/latest-stage3-${STAGE_ARCH}-hardened+nomultilib.txt"
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ESELECT_PROFILE="hardened/linux/${ARCH}/no-multilib"
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elif [ "${PROFILE}" = "server" ] ; then
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LATEST_STAGE_FILE="${STAGE_PATH}/latest-stage3-${STAGE_ARCH}.txt"
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ESELECT_PROFILE="default/linux/${ARCH}/10.0/no-multilib"
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else
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die "Unknown profile!"
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fi
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STAGE_TARBALL=${GENTOO_MIRROR}/releases/${STAGE_ARCH}/autobuilds/$(curl -s ${LATEST_STAGE_FILE} | grep -v "^#" | head -n 1)
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PORTAGE_SNAPSHOT="${GENTOO_MIRROR}/snapshots/portage-latest.tar.bz2"
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[ -d ${ROOT_FS} ] || die "${ROOT_FS} does not exists"
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[ -w ${ROOT_FS} ] || die "${ROOT_FS} isn't writable"
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cd ${ROOT_FS}
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if [ ! -d "usr" ] ; then
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fetch_file "${STAGE_TARBALL}" "${STAGE_TARBALL}.DIGESTS"
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tar jxpf stage3*.bz2 || die "Extracting stage file failed"
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rm -f stage3*.bz2
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fi
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if [ ! -d "usr/portage" ] ; then
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fetch_file "${PORTAGE_SNAPSHOT}" "${PORTAGE_SNAPSHOT}.md5sum"
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tar jxf portage-latest.tar.bz2 -C "${ROOT_FS}/usr" || die "Extracting portage snapshot failed"
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rm -f portage-latest.tar.bz2
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fi
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}
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usage() {
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cat << EOF
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Usage: $0 [options]
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This script builds a generic gentoo stage3 image
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OPTIONS:
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-h Show this message
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-a arch, either i686 or x86_64, defaults to uname -m
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-p profile, either hardened or hardened-no-multilib or server(default)
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-t The timezone to use, default to GMT
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-v Verbose
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EOF
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}
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while getopts ":a:p:t:vh" OPTIONS; do
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case $OPTIONS in
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a ) ARCH=$OPTARG;;
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p ) PROFILE=$OPTARG;;
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t ) TIMEZONE=$OPTARG;;
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v ) VERBOSE=1;;
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? )
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usage
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exit
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;;
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esac
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done
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ARCH=${ARCH-"$(uname -m)"}
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PROFILE=${PROFILE="server"}
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TIMEZONE=${TIMEZONE-"GMT"}
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bootstrap /opt/gentoo ${PROFILE} ${ARCH}
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