Synnefo » snf-image

#!/bin/bash

# Copyright 2011 GRNET S.A. All rights reserved.

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set -e

set -o pipefail

. common.sh

ganeti_os_main

case "$IMAGE_TYPE" in

    extdump)

	image_file="$IMAGE_DIR/$IMAGE_NAME-$ARCH.extdump";;

    ntfsdump)

        image_file="$IMAGE_DIR/$IMAGE_NAME-$ARCH.ntfsdump";;

    *)

        log_error "Unknown image type: \`$IMAGE_TYPE'.";

        exit 1

esac

if [ ! -e "$image_file" ]; then

    log_error "Image file \`$image_file' does not exit."

    exit 1

fi

monitor="" #Empty if progress monitor support is disabled

if [ "$progress_monitor_support" = "yes" ]; then

    image_size="$(stat -L -c %s "$image_file")"

    monitor="$(printf "%q" "$PROGRESS_MONITOR") \

        -i $(printf "%q" "$INSTANCE_NAME") -r $image_size"

fi

# If the target device is not a real block device we'll first losetup it.

# This is needed for file disks.

if [ ! -b "$blockdev" ]; then

    original_blockdev="$blockdev"

    blockdev=$("$LOSETUP" -sf "$blockdev")

    add_cleanup "$LOSETUP" -d "$blockdev"

fi

format_disk0 "$blockdev" "$IMAGE_TYPE"

filesystem_dev=$(map_disk0 "$blockdev")

add_cleanup unmap_disk0 "$blockdev"

root_dev="${filesystem_dev}-1"

# dd the dump to its new home :-)

# Deploying an image file on a target block device is a streaming

# copy operation. Enable the direct I/O flag on the output fd to 

# avoid polluting the host cache with useless data.

$monitor dd bs=4M if="$image_file" of="$root_dev" oflag=direct

# Create a floppy image

floppy=$(mktemp --tmpdir floppy.XXXXXX)

add_cleanup rm "$floppy"

snf_export_DEV=/dev/vda

snf_export_TYPE="$IMG_FORMAT"

snf_export_PASSWORD="$IMG_PASSWD"

snf_export_HOSTNAME="$instance"

if [ -n "$IMG_PERSONALITY" ]; then

    snf_export_PERSONALITY="$IMG_PERSONALITY"

fi

create_floppy "$floppy"

# Invoke the helper vm to do the dirty job...

result_file=$(mktemp --tmpdir result.XXXXXX)

add_cleanup rm "$result_file"

snapshot=$(mktemp --tmpdir helperXXXXXX.img)

add_cleanup rm "$snapshot"

"$QEMU_IMG" create -f qcow2 -b "$HELPER_IMG" "$snapshot"

"$TIMELIMIT" -t "$HELPER_SOFT_TIMEOUT" -T "$HELPER_HARD_TIMEOUT" \

    kvm -runas "$HELPER_USER" -drive file="$snapshot" \

    -drive file="$root_dev",format=raw,if=virtio,cache=none \

    -boot c -serial stdio -serial file:"$result_file" \

    -fda "$floppy" -vga none -nographic -parallel none -monitor null \

    -kernel "$HELPER_KERNEL" -initrd "$HELPER_INITRD" \

    -append "quiet ro root=/dev/sda1 console=ttyS0,9600n8 snf_image_activate_helper" \

    2>&1 | sed 's|^|HELPER: |g'

if [ $? -ne 0 ]; then

    if [ $? -gt 128 ];  then

        log_error "Helper was terminated. Did not finish on time."

    fi

    exit 1

fi

# Read the first line. This will remove \r and \n chars

result=$(sed 's|\r||g' "$result_file" | xargs echo)

if [ "x$result" != "xSUCCESS" ]; then

    log_error "Helper VM returned error"

    exit 1

fi

# Install a new MBR

"$INSTALL_MBR" -p 1 -i n "$blockdev"

# Execute cleanups

cleanup

trap - EXIT

exit 0

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