Daniel Watkins
10 years ago
parent
d4598f8326
commit
941d2b3ae1
@ -0,0 +1,283 @@
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#!/bin/bash
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rootd="${1:-/}"
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set -ex
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CLOUD_IMG_STR="# CLOUD_IMG: This file was created/modified by the Cloud Image build process"
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LANG=C
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_xchroot() {
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# Prevent multiple chroots
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if [ "$1" = "/" ]; then
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shift;
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"$@"
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else
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chroot "$@"
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fi
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}
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#### COMMON architecture independent functions
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arch=$(_xchroot "${rootd}" dpkg --print-architecture)
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add_serial_console() {
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condev=$1
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idir="$rootd/etc/init"
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cat << EOF > "${idir}/${condev}.conf"
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# CONDEV - getty
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#
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# This service maintains a getty on CONDEV from the point the system is
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# started until it is shut down again.
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start on stopped rc RUNLEVEL=[2345] and (
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not-container or
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container CONTAINER=lxc or
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container CONTAINER=lxc-libvirt)
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stop on runlevel [!2345]
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pre-start script
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# getty will not be started if the serial console is not present
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stty -F /dev/CONDEV -a 2> /dev/null > /dev/null || { stop ; exit 0; }
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end script
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respawn
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script
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exec /sbin/getty -L CONDEV 115200 vt102
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end script
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${CLOUD_IMG_STR}
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EOF
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sed -i "s/CONDEV/${condev}/g" "$idir/${condev}.conf"
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}
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## --------------
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# remove 127.0.1.1 entry (LP: #440757)
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_xchroot "${rootd}" sh -c 'sed -i "/^127.0.1.1/d" /etc/hosts'
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## --------------
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# remove ssh pregenerated keys (LP: #512377)
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_xchroot "${rootd}" sh -c 'rm -f /etc/ssh/ssh_host_[rd]sa_key*'
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## --------------
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_xchroot "${rootd}" locale-gen en_US.utf8
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## --------------
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# set cloud-init to be on
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values="NoCloud, ConfigDrive, AltCloud, OVF, MAAS, Ec2, None"
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printf "%s\t%s\t%s\t%s\n" \
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cloud-init cloud-init/datasources multiselect "$values" |
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_xchroot "${rootd}" debconf-set-selections
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_xchroot "${rootd}" dpkg-reconfigure --frontend=noninteractive cloud-init
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## --------------
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# write some build information to the guest
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# the idea is that given runtime info and this info, the instance
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# can at least determine if there is a newer build available
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# these variables are passed in in environment from cloudimg-build-launcher
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if [ -n "${build_name}" -o -n "${serial}" ]; then
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d="${rootd}/etc/cloud"
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[ -d "$d" ] || mkdir -p "${d}"
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{
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[ -n "${build_name}" ] && echo "build_name: ${build_name}"
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[ -n "${serial}" ] && echo "serial: ${serial}"
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} > "$d/build.info"
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fi
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## --------------
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# for maverick and newer, use LABEL= for the '/' entry in fstab
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if [ -n "${root_fs_label}" ]; then
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bl="[:blank:]"
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lstr="LABEL=${root_fs_label}"
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sed -i "s,^[^#${bl}]*\([${bl}]*/[${bl}].*\),${lstr}\1," "${rootd}/etc/fstab"
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fi
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## Make sure that the update-motd.d directory exists
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[ ! -e "${rootd}/etc/update-motd.d" ] &&
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mkdir -p "${rootd}/etc/update-motd.d"
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## write a MOTD file advertising support for images
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cat > "${rootd}/etc/update-motd.d/51-cloudguest" << EOF
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#!/bin/sh
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#
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${CLOUD_IMG_STR}
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# This file is not managed by a package. If you no longer want to
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# see this message you can safely remove the file.
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echo ""
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echo " Get cloud support with Ubuntu Advantage Cloud Guest:"
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echo " http://www.ubuntu.com/business/services/cloud"
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EOF
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chmod +x "${rootd}/etc/update-motd.d/51-cloudguest"
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# for quantal and newer, add /etc/overlayroot.local.conf
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# but do not overwrite anything that somehow got there
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if [ -f "${rootd}/etc/overlayroot.conf" ] &&
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[ ! -f "${rootd}/etc/overlayroot.local.conf" ]; then
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{
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echo "${CLOUD_IMG_STR}"
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echo "overlayroot_cfgdisk=LABEL=OROOTCFG"
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} > "${rootd}/etc/overlayroot.local.conf"
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fi
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#### END COMMON ARCH FUNCTIONS
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if [ "$arch" = "ppc64el" ]; then
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add_serial_console hvc0
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exit 0
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fi
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# ARM images are special
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if [[ "$arch" =~ (arm|arm64|aarch64) ]]; then
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echo "Configuring ARM Serial Port"
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add_serial_console ttyAMA0
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echo "Image architecture is ARM. Existing vmbuilder-fixups"
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exit 0
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fi
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## Add ttyS0 for i386/amd64 for Trusty and newer
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if [ "$arch" = "i386" -o "$arch" = "amd64" ]; then
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add_serial_console ttyS0
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fi
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psuedo_grub_probe() {
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cat <<"PSUEDO_GRUB_PROBE"
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#!/bin/sh
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Usage() {
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cat <<EOF
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Usage: euca-psuedo-grub-probe
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this is a wrapper around grub-probe to provide the answers for an ec2 guest
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EOF
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}
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bad_Usage() { Usage 1>&2; fail "$@"; }
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short_opts=""
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long_opts="device-map:,target:,device"
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getopt_out=$(getopt --name "${0##*/}" \
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--options "${short_opts}" --long "${long_opts}" -- "$@") &&
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eval set -- "${getopt_out}" ||
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bad_Usage
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device_map=""
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target=""
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device=0
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arg=""
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while [ $# -ne 0 ]; do
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cur=${1}; next=${2};
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case "$cur" in
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--device-map) device_map=${next}; shift;;
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--device) device=1;;
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--target) target=${next}; shift;;
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--) shift; break;;
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esac
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shift;
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done
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arg=${1}
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case "${target}:${device}:${arg}" in
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device:*:/*) echo "/dev/sda1"; exit 0;;
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fs:*:*) echo "ext2"; exit 0;;
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partmap:*:*)
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# older versions of grub (lucid) want 'part_msdos' written
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# rather than 'msdos'
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legacy_pre=""
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grubver=$(dpkg-query --show --showformat '${Version}\n' grub-pc 2>/dev/null) &&
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dpkg --compare-versions "${grubver}" lt 1.98+20100804-5ubuntu3 &&
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legacy_pre="part_"
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echo "${legacy_pre}msdos";
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exit 0;;
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abstraction:*:*) echo ""; exit 0;;
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drive:*:/dev/sda) echo "(hd0)";;
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drive:*:/dev/sda*) echo "(hd0,1)";;
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fs_uuid:*:*) exit 1;;
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esac
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PSUEDO_GRUB_PROBE
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}
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## --------------
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# add 'acpiphp' to modules so it is loaded on boot (LP: #450463)
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_xchroot "${rootd}" sh -c 'f=/etc/modules;
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grep "^acpiphp$" "${f}" ||
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printf "# %s\n%s\n" "LP: #450463" "acpiphp" >> "${f}"'
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## install / setup grub2
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gprobe="${rootd}/usr/sbin/grub-probe"
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moved=0
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if [ -f "${gprobe}" ]; then
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mv "${gprobe}" "${gprobe}.dist"
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moved=1
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fi
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psuedo_grub_probe > "${gprobe}"
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chmod 755 "${gprobe}"
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# for Quantal and later, use /etc/default/grub.d functionality
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# rather than modifying the grub configuration itself.
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# This avoids the mess of having to do dpkg stuff
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# LP: 1179940
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mkdir -p "${rootd}/etc/default/grub.d"
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cat << EOF > "${rootd}/etc/default/grub.d/50-cloudimg-settings.cfg"
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# Cloud Image specific Grub settings for Generic Cloud Images
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${CLOUD_IMG_STR}
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# Set the recordfail timeout
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GRUB_RECORDFAIL_TIMEOUT=0
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# Do not wait on grub prompt
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GRUB_TIMEOUT=0
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# Set the default commandline
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GRUB_CMDLINE_LINUX_DEFAULT="console=tty1 console=ttyS0"
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# Set the grub console type
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GRUB_TERMINAL=console
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EOF
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_xchroot "${rootd}" update-grub2
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# since this is a disk image, we technically don't need to install all the
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# grub modules, as the image itself is not bootable. This makes for a small
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# disk image
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_xchroot "${rootd}" update-grub
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# reconfigure grub so that upgrades to grub-pc do not force a debconf config
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# changed prompt (LP: #1009294). This re-runs update-grub
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_xchroot "${rootd}" env DEBIAN_FRONTEND=noninteractive \
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dpkg-reconfigure grub-pc
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grub2cfg="${rootd}/boot/grub/grub.cfg"
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[ ! -f "${grub2cfg}" ] ||
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sed -i -e "s,root=/dev/sda1,root=LABEL=${root_fs_label}," "${grub2cfg}"
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[ ${moved} -eq 0 ] || mv "${gprobe}.dist" "${gprobe}"
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## modify /boot/grub/menu.lst if it exists
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## this is generated at install time by grub-legacy-ec2, but will have
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## devices as found from the _xchroot. Here we write what it will be on ec2
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if [ -f "${rootd}/boot/grub/menu.lst" ]; then
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grub_root="(hd0)"
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linux_root=/dev/sda1
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[ -n "${root_fs_label}" ] && linux_root="LABEL=${root_fs_label}"
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# the sed code below basically fixes/sets the following lines in a
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# /boot/grub/menu.lst file:
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# # kopt=root=xxxxxxx ro
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# kernel /boot/vmlinuz-... root=xxxxxx ....
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# # groot=xxxxx
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# root xxxxx
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# uuuid xxxxx
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sed -i "${rootd}/boot/grub/menu.lst" \
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-e "s|^\(# kopt=root=\)[^ ]*|\1${linux_root}|" \
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-e "s|^\(kernel.*root=\)[^ ]*|\1${linux_root}|" \
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-e "s|^\(# groot=\)[^ ]*|\1${grub_root}|" \
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-e "s|^\(root\|uuid\)\([[:space:]]*\).*|root\2${grub_root}|"
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# grub-legacy-ec2 writes this ucf entry. since we've modified
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# /boot/grub/menu.lst, we have to remove it, or the user will
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# get prompted for a 3 way merge of the changes the first time this runs
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_xchroot "${rootd}" /usr/bin/ucfr --purge grub /var/run/grub/menu.lst
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fi
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# vi: ts=3 expandtab
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