root / snf-image-host / snf-image-update-helper.in @ 2187080b
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#!/bin/bash |
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# Copyright (C) 2011 GRNET S.A. |
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# |
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# This program is free software; you can redistribute it and/or modify |
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# it under the terms of the GNU General Public License as published by |
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# the Free Software Foundation; either version 2 of the License, or |
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# (at your option) any later version. |
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# |
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# This program is distributed in the hope that it will be useful, but |
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# WITHOUT ANY WARRANTY; without even the implied warranty of |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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# General Public License for more details. |
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# |
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# You should have received a copy of the GNU General Public License |
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# along with this program; if not, write to the Free Software |
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
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# 02110-1301, USA. |
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|
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set -e |
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set -o pipefail |
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set -o errtrace |
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|
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. @osdir@/common.sh |
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|
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usage() { |
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local rc="$1" |
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|
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cat <<EOF |
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|
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Usage: $0 [options] |
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|
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This script runs a debootstrap and creates a small Debian image populated with |
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the snf-image-helper package. This needs to be done before the first use of |
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ganeti's \`snf-image' guest OS type. |
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|
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OPTIONS: |
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-d DIRECTORY |
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Use this directory to host the created files, instead of the default |
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[default: $HELPER_DIR] |
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|
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-h Print this message |
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|
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-p PACKAGE |
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Install this deb package in the helper image, instead of the default |
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[default: $HELPER_PKG] |
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|
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-r Don't use any existing cache |
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|
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-y Assume Yes to all queries and do not prompt |
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|
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EOF |
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|
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exit "$rc" |
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} |
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|
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while getopts "d:hp:ry" opt; do |
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case $opt in |
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d) HELPER_DIR="$OPTARG" |
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;; |
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h) usage 0 |
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;; |
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p) HELPER_PKG="$OPTARG" |
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;; |
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r) NO_CACHE="yes" |
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;; |
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y) NO_PROMPT="yes" |
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;; |
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?) log_error "Use \`-h' for help"; exit 1 |
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;; |
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esac |
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done |
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|
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echo |
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echo "This is the update helper image script for snf-image." |
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echo "If you don't know what to do, use \`-h'." |
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echo |
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|
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if [ ! -d "$HELPER_DIR" -o ! -w "$HELPER_DIR" ]; then |
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log_error "Helper directory \`$HELPER_DIR' does not exist or the script" \ |
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"has no write permission on it." |
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exit 1 |
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fi |
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|
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if [ ! -e "$MULTISTRAP_CONFIG" ]; then |
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log_error "Multistrap configuration file: \`$MULTISTRAP_CONFIG' does not" \ |
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"exist or is not readable by the script." |
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exit 1 |
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fi |
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|
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cat >&1 <<EOF |
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This program will overwrite the following files if present: |
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\`$HELPER_DIR/initrd' |
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\`$HELPER_DIR/kernel' |
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\`$HELPER_DIR/image' |
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EOF |
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|
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while [[ 1 ]]; do |
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echo -n "Do you want to continue [y/N]? " |
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if [ "x$NO_PROMPT" = "xyes" ]; then |
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echo "y"; |
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break; |
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fi |
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|
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read answer |
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[ "$(echo -n "$answer" | tr [A-Z] [a-z])" = "y" ] && break |
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if [ -z "$answer" -o "$(echo -n "$answer" | tr [A-Z] [a-z])" = "n" ]; then |
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log_error "Abort." |
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exit 1 |
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fi |
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done |
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|
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rm -f "$HELPER_DIR/initrd" "$HELPER_DIR/kernel" "$HELPER_DIR/image" |
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|
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echo -n "Allocating space for helper disk image..." |
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helper_img=$(mktemp "$HELPER_DIR/image.XXXXXX") |
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add_cleanup rm -f "$helper_img" |
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dd if=/dev/zero of="$helper_img" bs=1k count=400000 &> /dev/null |
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echo "done" |
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|
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echo "Creating partitions..." |
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blockdev=$("$LOSETUP" -sf $helper_img) |
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add_cleanup "$LOSETUP" -d "$blockdev" |
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|
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sleep 1 # sometimes losetup returns and the device is still busy.. |
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|
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format_disk0 "$blockdev" "extdump" 2>&1 | sed -e 's/^/CFDISK: /g' |
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|
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root_dev=$(map_disk0 "$blockdev")-1 |
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add_cleanup unmap_disk0 "$blockdev" |
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|
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echo Creating and configuring filesystem... |
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mkfs.ext3 "$root_dev" 2>&1 | sed -e 's/^/MKFS.EXT3: /g' |
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# The helper vm should never do filesystem checks... |
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tune2fs -i 0 -c 0 "$root_dev" 2>&1 | sed -e 's/^/TUNE2FS: /g' |
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|
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target=$(mktemp -d) |
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add_cleanup rmdir "$target" |
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|
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mount "$root_dev" "$target" |
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add_cleanup umount "$root_dev" |
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|
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do_multistrap "$target" |
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|
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# Save the package list |
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chroot "$target" dpkg-query -W > "$HELPER_DIR/packages" |
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|
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echo -n "Configuring the helper image..." |
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echo snf-image-helper > "$target/etc/hostname" |
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|
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cat > "$target/etc/fstab" <<EOF |
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# /etc/fstab: static file system information. |
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# |
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# <file system> <mount point> <type> <options> <dump> <pass> |
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/dev/sda1 / ext3 defaults 0 1 |
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proc /proc proc defaults 0 0 |
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EOF |
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echo "done" |
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|
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echo -n "Extracting kernel..." |
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if [ ! -L "$target/vmlinuz" -o ! -L "$target/vmlinuz" ]; then |
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echo -e "\033[1;31mfailed\033[0m" |
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log_error "vmlinuz or initrd.img link in root is missing." |
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log_error "I don't know how to find a usable kernel/initrd pair." |
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exit 1 |
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fi |
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echo "done" |
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|
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kernel="$target/$(chroot "$target" readlink -en /vmlinuz)" |
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initrd="$target/$(chroot "$target" readlink -en /initrd.img)" |
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|
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echo "Moving $(basename "$kernel") and $(basename "$initrd") to \`$HELPER_DIR'" |
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cp "$kernel" "$initrd" "$HELPER_DIR" |
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|
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kernel=$(basename "$kernel") |
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initrd=$(basename "$initrd") |
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|
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(cd "$HELPER_DIR"; ln -fs "$kernel" kernel; ln -fs "$initrd" initrd) |
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|
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rm "$target/vmlinuz" "$target/initrd.img" |
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|
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pkg_installed=$(grep snf-image-helper "$HELPER_DIR/packages" > /dev/null && echo yes) |
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|
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if [ ! -r "$HELPER_PKG" -a -z "$pkg_installed" ]; then |
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log_error "ERROR:" |
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log_error "Helper package \`$HELPER_PKG' does not exist or is not" \ |
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"readable by the script." |
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exit 1 |
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fi |
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|
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if [ -r "$HELPER_PKG" ]; then |
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echo "Installing snf-image-helper pkg in the new image..." |
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cp "$HELPER_PKG" "$target/tmp/" |
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pkg_name=$(basename "$HELPER_PKG") |
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add_cleanup rm "$target/tmp/$pkg_name" |
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chroot "$target" dpkg -i "/tmp/$pkg_name" 2>&1 | sed -e 's/^/DPKG: /g' |
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|
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# Recreate package list |
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chroot "$target" dpkg-query -W > "$HELPER_DIR/packages" |
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else |
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echo "snf-image-helper pkg was installed from the apt repository." |
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fi |
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|
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mv "$helper_img" "$HELPER_DIR/image" |
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|
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echo "Files in \`$HELPER_DIR' were updated successfully" |
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exit 0 |
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|
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# vim: set sta sts=4 shiftwidth=4 sw=4 et ai : |