3 # Copyright (C) 2011 GRNET S.A.
5 # This program is free software; you can redistribute it and/or modify
6 # it under the terms of the GNU General Public License as published by
7 # the Free Software Foundation; either version 2 of the License, or
8 # (at your option) any later version.
10 # This program is distributed in the hope that it will be useful, but
11 # WITHOUT ANY WARRANTY; without even the implied warranty of
12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 # General Public License for more details.
15 # You should have received a copy of the GNU General Public License
16 # along with this program; if not, write to the Free Software
17 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
32 This script runs a debootstrap and creates a small Debian image populated with
33 the snf-image-helper package. This needs to be done before the first use of
34 ganeti's \`snf-image' guest OS type.
38 Use this cache file, instead of the default
39 [default: $HELPER_CACHE_FILE]
42 Use this directory to host the created files, instead of the default
43 [default: $HELPER_DIR]
48 Install this deb package in the helper image, instead of the default
49 [default: $HELPER_PKG]
51 -y Assume Yes to all queries and do not prompt
58 while getopts "c:d:hp:y" opt; do
60 c) HELPER_CACHE_FILE="$OPTARG"
62 d) HELPER_DIR="$OPTARG"
66 p) HELPER_PKG="$OPTARG"
70 ?) log_error "Use \`-h' for help"; exit 1
76 echo "This is the update helper image script for snf-image."
77 echo "If you don't know what to do, use \`-h'."
80 if [ ! -d "$HELPER_DIR" -o ! -w "$HELPER_DIR" ]; then
82 log_error "Helper directory \`$HELPER_DIR' does not exist or the script" \
83 "has no write permission on it."
87 if [ ! -r "$HELPER_PKG" ]; then
89 log_error "Helper package \`$HELPER_PKG' does not exist or is not " \
90 "readable by the script."
95 This program will overwrite the following files if present:
102 echo -n "Do you want to continue [y/N]? "
103 if [ "x$NO_PROMPT" = "xyes" ]; then
109 [ "$(echo -n "$answer" | tr [A-Z] [a-z])" = "y" ] && break
110 if [ -z "$answer" -o "$(echo -n "$answer" | tr [A-Z] [a-z])" = "n" ]; then
116 rm -f "$HELPER_DIR/initrd" "$HELPER_DIR/kernel" "$HELPER_DIR/image"
118 echo -n "Allocating space for helper disk image..."
119 helper_img=$(mktemp "$HELPER_DIR/image.XXXXXX")
121 dd if=/dev/zero of="$helper_img" bs=1k count=400000 &> /dev/null
124 echo "Creating partitions..."
125 blockdev=$("$LOSETUP" -sf $helper_img)
126 add_cleanup "$LOSETUP" -d "$blockdev"
128 sleep 1 # sometimes losetup returns and the device is still busy..
130 format_disk0 "$blockdev" "extdump" 2>&1 | sed -e 's/^/CFDISK: /g'
132 root_dev=$(map_disk0 "$blockdev")-1
133 add_cleanup unmap_disk0 "$blockdev"
135 echo Creating and configuring filesystem...
136 mkfs.ext3 "$root_dev" 2>&1 | sed -e 's/^/MKFS.EXT3: /g'
137 # The helper vm should never do filesystem checks...
138 tune2fs -i 0 -c 0 "$root_dev" 2>&1 | sed -e 's/^/TUNE2FS: /g'
141 add_cleanup rmdir "$target"
143 mount "$root_dev" "$target"
144 add_cleanup umount "$root_dev"
146 echo -n "Checking for cached root filesystem file \`$HELPER_CACHE_FILE'..."
147 if [ -f "$HELPER_CACHE_FILE" ]; then
149 tar xf "$HELPER_CACHE_FILE" -C "$target"
152 echo "Debootstraping to create a new root filesystem:"
154 # Create a policy-rc.d file to deny init script execution
155 mkdir -p "$target/usr/sbin"
156 cat > "$target/usr/sbin/policy-rc.d" <<EOF
160 chmod +x "$target/usr/sbin/policy-rc.d"
162 debootstrap --arch amd64 --include "$HELPER_EXTRA_PKGS" \
163 --variant=minbase stable "$target" "$HELPER_MIRROR" 2>&1 | \
164 sed -e 's/^/DEBOOTSTRAP: /g'
166 rm "$target/usr/sbin/policy-rc.d"
168 # remove the downloaded debs, as they are no longer needed
169 find "$target/var/cache/apt/archives" -type f -name '*.deb' -print0 | \
172 tmp_cache=$(mktemp "$HELPER_CACHE_FILE.XXXXXX")
173 tar cf "$tmp_cache" --one-file-system -C "$target" . || \
174 { rm "$tmp_cache"; false; }
175 mv -f "$tmp_cache" "$HELPER_CACHE_FILE"
178 echo -n "Configuring the helper image..."
179 echo snf-image-helper > "$target/etc/hostname"
181 cat > "$target/etc/fstab" <<EOF
182 # /etc/fstab: static file system information.
184 # <file system> <mount point> <type> <options> <dump> <pass>
185 /dev/sda1 / ext3 defaults 0 1
186 proc /proc proc defaults 0 0
190 echo -n "Extracting kernel..."
191 if [ ! -L "$target/vmlinuz" -o ! -L "$target/vmlinuz" ]; then
192 echo -e "\033[1;31mfailed\033[0m"
193 log_error "vmlinuz or initrd.img link in root is missing."
194 log_error "I don't know how to find a usable kernel/initrd pair."
199 kernel=$(readlink -en "$target/vmlinuz")
200 initrd=$(readlink -en "$target/initrd.img")
202 echo "Moving $(basename "$kernel") and $(basename "$initrd") to \`$HELPER_DIR'"
203 mv "$kernel" "$initrd" "$HELPER_DIR"
205 kernel=$(basename "$kernel")
206 initrd=$(basename "$initrd")
208 (cd "$HELPER_DIR"; ln -fs "$kernel" kernel; ln -fs "$initrd" initrd)
210 rm "$target/vmlinuz" "$target/initrd.img"
212 echo "Installing snf-image-helper pkg in the new image..."
213 cp "$HELPER_PKG" "$target/tmp/"
214 pkg_name=$(basename "$HELPER_PKG")
215 add_cleanup rm "$target/tmp/$pkg_name"
216 chroot "$target" dpkg -i "/tmp/$pkg_name" 2>&1 | sed -e 's/^/DPKG: /g'
218 cat > "$target/etc/rc.local" <<EOF
223 # This script is executed at the end of each multiuser runlevel.
224 # Make sure that the script will "exit 0" on success or any other
227 # In order to enable or disable this script just change the execution
230 # By default this script does nothing.
232 if ! grep -q snf_image_activate_helper /proc/cmdline; then
233 echo "WARNING: NOT calling snf-image-helper, add snf_image_activate_helper"
234 echo "to the kernel command line if you want to do so."
236 /usr/bin/snf-image-helper --force
242 chmod +x "$target/etc/rc.local"
248 mv "$helper_img" "$HELPER_DIR/image"
252 echo "Files in \`$HELPER_DIR' were updated successfully"
255 # vim: set sta sts=4 shiftwidth=4 sw=4 et ai :