# Copyright (C) 2007 Red Hat Inc.
# Written by Richard W.M. Jones <rjones@redhat.com>
#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+#
# $Id$
export PATH=/usr/sbin:/sbin:/usr/local/bin:/usr/kerberos/bin:/usr/bin:/bin
# (only if override_remote_transport is 'ssh')
override_remote_directory=
-# list of local physical devices to examine, separated by spaces,
+# list of local physical devices to send, separated by spaces,
# if empty ask user.
# this is usually a list of whole disk devices (eg. "sda")
-override_physical_devices=""
+override_devices_to_send=""
-# list of filesystems to send (eg. "sda1 sda2 VolGroup00/LogVol00")
-override_filesystems_to_send=""
-
-# list of root filesystems to examine (eg. "sda3" or
+# the root filesystem containing /etc/fstab (eg. "sda3" or
# "VolGroup00/LogVol00")
-override_root_filesystems=""
+override_root_filesystem=""
# network configuration
# - if empty, ask user
-# - if contains a filesystem name (eg. "VolGroup00/LogVol00") try to
-# auto-configure network from that
+# - "auto" means try to autoconfigure from root filesystem
# (XXX needs to contain more ways to override in future)
override_network=""
#----------------------------------------------------------------------
# Device mapper snapshotting.
+next_ramdisk=1
+
# Create a device-mapper snapshot of a device with ramdisk overlay.
# Example:
# snapshot sda1 snap
function snapshot {
local dev=$1 name=$2
+ # Next free ramdisk (/dev/ram$i)
+ local i=$next_ramdisk
+ next_ramdisk=$(($next_ramdisk+1))
+
# Get size of the device in sectors.
local sectors=`blockdev --getsize /dev/$dev`
--table="0 $sectors snapshot-origin /dev/$dev"
if [ $? -ne 0 ]; then exit 1; fi
dmsetup create $name \
- --table="0 $sectors snapshot /dev/mapper/${name}_org /dev/ram1 n 64"
+ --table="0 $sectors snapshot /dev/mapper/${name}_org /dev/ram$i n 64"
if [ $? -ne 0 ]; then exit 1; fi
}
# drop_snapshot snap
# drops a snapshot called /dev/mapper/snap
function drop_snapshot {
+ local name=$1
+
dmsetup remove /dev/mapper/$name
dmsetup remove /dev/mapper/${name}_org
}
#----------------------------------------------------------------------
# Network configuration functions.
-# `auto_network $fs' mounts /dev/$fs read-only on /mnt/root and then
-# tries to configure the network from it. Returns true or false.
+# `auto_network' tries to configure the network from the
+# root filesystem. Returns true or false.
function auto_network {
- if ! mount -o ro /dev/$1 /mnt; then return 1; fi
-
# Make sure this file exists, otherwise Fedora gives a warning.
touch /etc/resolv.conf
mv network-scripts network-scripts.saved
# Originally I symlinked these, but that causes dhclient to
- # keep open /mnt (as its cwd is in network-scripts subdir).
+ # keep open /mnt/root (as its cwd is in network-scripts subdir).
# So now we will copy them recursively instead.
- cp -r /mnt/etc/sysconfig/network .
- cp -r /mnt/etc/sysconfig/networking .
- cp -r /mnt/etc/sysconfig/network-scripts .
- # This also means we can umount /mnt early.
- umount /mnt
+ cp -r /mnt/root/etc/sysconfig/network .
+ cp -r /mnt/root/etc/sysconfig/networking .
+ cp -r /mnt/root/etc/sysconfig/network-scripts .
/etc/init.d/network start
local status=$?
# Block devices configuration.
devices)
- if [ -n "$override_physical_devices" ]; then
- physical_devices="$override_physical_devices"
- state=filesystems
+ if [ -n "$override_devices_to_send" ]; then
+ devices_to_send="$override_devices_to_send"
+ state=root
else
# Returns the list of physical devices in $devices
search_devices
deviceslist=""
for d in $devices; do
- if word_in_list $d $physical_devices; then
+ if word_in_list $d $devices_to_send; then
stat=on
else
stat=off
dialog \
--extra-button --extra-label "Back" --nocancel \
--single-quoted \
- --checklist "Pick local disks to examine" 15 50 8 \
+ --checklist "Pick disks to send" 15 50 8 \
$deviceslist \
2> line
if [ $? -eq 3 ]; then state=directory
else
- physical_devices=`cat line`
- state=filesystems
+ devices_to_send=`cat line`
+ state=root
fi
fi
;;
- filesystems)
- if [ -n "$override_filesystems_to_send" ]; then
- filesystems_to_send="$override_filesystems_to_send"
- state=roots
+
+ # Root filesystem.
+ root)
+ if [ -n "$override_root_filesystem" ]; then
+ root_filesystem="$override_root_filesystem"
+ state=network
else
# Returns the list of possible partitions / LVs in $parts
- search_parts $physical_devices
+ search_parts $devices_to_send
log partitions returned by search_parts: $parts
partslist=""
- for p in $parts; do
- if word_in_list $p $filesystems_to_send; then
- stat=on
- else
- stat=off
- fi
- gigs=$(($(blockdev --getsize /dev/$p)/2/1024/1024))
- partslist="$partslist $p /dev/$p(${gigs}GB) $stat"
- done
-
- dialog \
- --extra-button --extra-label "Back" --nocancel \
- --single-quoted \
- --checklist "Pick filesystems to send" 15 70 8 \
- $partslist \
- 2> line
- if [ $? -eq 3 ]; then state=devices
- else
- filesystems_to_send=`cat line`
- state=roots
- fi
- fi
- ;;
- roots)
- if [ -n "$override_root_filesystems" ]; then
- root_filesystems="$override_root_filesystems"
- state=network
- else
- partslist=""
- for r in $filesystems_to_send; do
- if word_in_list $r $root_filesystems; then
+ for r in $parts; do
+ if word_in_list $r $root_filesystem; then
stat=on
else
stat=off
dialog \
--extra-button --extra-label "Back" --nocancel \
--single-quoted \
- --checklist "Pick partition(s) containing a root (/) filesystem" 10 70 5 \
+ --radiolist "Pick partition containing the root (/) filesystem" 10 70 5 \
$partslist \
2> line
- if [ $? -eq 3 ]; then state=filesystems
+ if [ $? -eq 3 ]; then state=devices
else
- root_filesystems=`cat line`
+ root_filesystem=`cat line`
state=network
fi
fi
network="$override_network"
state=verify
else
- partslist=""
- for r in $root_filesystems; do
- if [ "$r" = "$network" ]; then
- stat=on
- else
- stat=off
- fi
- partslist="$partslist $r Auto-configure $stat"
- done
-
dialog \
--extra-button --extra-label "Back" --nocancel \
--radiolist "Network configuration" 10 70 5 \
- $partslist \
+ "auto" "Auto-configure from root filesystem" on \
"ask" "Manual configuration" off \
"sh" "Configure from the shell" off \
2> line
- if [ $? -eq 3 ]; then state=roots
+ if [ $? -eq 3 ]; then state=root
else
network=`cat line`
state=verify
else
dialog \
--title "Summary" \
- --yesno "Transport: $remote_transport\nRemote host: $remote_host\nRemote port: $remote_port\nRemote directory (ssh only): $remote_directory\nFilesystems to send: $filesystems_to_send\nRoot filesystem(s): $root_filesystems\nNetwork configuration: $network\n\nProceed with these settings?" \
- 23 70
+ --yesno "Transport: $remote_transport\nRemote host: $remote_host\nRemote port: $remote_port\nRemote directory (ssh only): $remote_directory\nDisks to send: $devices_to_send\nRoot filesystem: $root_filesystem\nNetwork configuration: $network\n\nProceed with these settings?" \
+ 18 70
if [ $? -eq 1 ]; then
state=transport
else
clear
+#----------------------------------------------------------------------
+# De-activate all volume groups and switch to new dm-only LVM config.
+log deactivating volume groups
+
+vgchange -a n
+mv /etc/lvm/lvm.conf /etc/lvm/lvm.conf.old
+mv /etc/lvm/lvm.conf.new /etc/lvm/lvm.conf
+rm -f /etc/lvm/cache/.cache
+
+# Snapshot the block devices.
+for d in $devices_to_send; do
+ log snapshotting block device /dev/$d ...
+
+ snapshot $d snap_$d
+
+ # The block devices are whole disks. Use kpartx to repartition them.
+ log running kpartx -a /dev/mapper/snap_$d ...
+ kpartx -a /dev/mapper/snap_$d
+done
+
+# Rescan for LVs.
+log running vgscan
+vgscan
+vgchange -a y
+
+# Mount the root filesystem on /mnt/root. If it's a physical
+# device then we want to mount (eg) /dev/mapper/snap_sda2.
+# If it's a LVM device then we can just mount the LVM partition.
+
+log mount $root_filesystem as /mnt/root
+
+if [ -f /dev/mapper/snap_$root_filesystem ]; then
+ mount /dev/mapper/snap_$root_filesystem /mnt/root
+else
+ mount /dev/$root_filesystem /mnt/root
+fi
+
+#----------------------------------------------------------------------
# Now see if we can get a network configuration.
log network configuration $network
echo
echo "Please configure the network from this shell."
echo
- echo "You can modify any file under /etc (especially /etc/sysconfig)."
- echo "No changes are made to the system disks unless you mount them"
- echo "and explicitly modify them."
- echo
echo "When finished, exit with ^D or exit"
echo
shell
shell
;;
- *)
- echo "Trying to auto-configure network from /dev/$network ..."
+ auto)
+ echo "Trying to auto-configure network from root filesystem ..."
echo
- if ! auto_network "$network"; then
+ if ! auto_network; then
echo "Auto-configuration failed. Starting a shell."
echo
shell
fi
esac
-# Mount the root filesystem(s) using device-mapper snapshots.
-# The snapshots are called snap0, snap1, etc. with the number
-# corresponding to its index in $root_filesystems array.
+#----------------------------------------------------------------------
+# Rewrite /mnt/root/etc/fstab
+log rewriting /etc/fstab
+cp /mnt/root/etc/fstab /mnt/root/etc/fstab.p2vsaved
+while read dev mountpoint fstype options freq passno; do
+ # If device is /dev/sd* then on the target fullvirt machine
+ # it will be /dev/sd*
+ if matches_regexp "^/dev/sd[[:alpha:]]+[[:digit:]]+$" "$dev"; then
+ dev=`echo $dev | sed 's|^/dev/sd|/dev/hd|'`
+ fi
+ # Print out again with all the fields nicely lined up.
+ printf "%-23s %-23s %-7s %-15s %d %d\n" \
+ "$dev" "$mountpoint" "$fstype" "$options" "$freq" "$passno"
+done < /mnt/root/etc/fstab.p2vsaved > /mnt/root/etc/fstab
+
+#----------------------------------------------------------------------
+# XXX Look for other files which might need to be changed here ...
+# We've now finished with /mnt/root (the real root filesystem),
+# so unmount it and synch everything.
+umount /mnt/root
+sync
+
+#----------------------------------------------------------------------
+# Send the device snapshots (underlying device + changes in ramdisk)
+# to the remote server.
+
+log sending disks
+
+# XXX Effectively this is using the hostname derived from network
+# configuration, but we might want to ask the user instead.
+# XXX How do we ensure that we won't overwrite target files? Currently
+# tries to use the current date as a uniquifier.
+# Names will be something like
+# p2v-oirase-200709011249-hda.img
+basename=p2v-`hostname -s|tr -cd '[0-9a-zA-Z]'`-`date +'%Y%m%d%H%M'`
+for dev in $devices_to_send; do
+ rdev=`echo $dev | sed 's|^sd|hd|'`
+ name="$basename-$rdev.img"
+ log sending $dev to $name
+ sectors=`blockdev --getsize /dev/mapper/snap_$dev`
+ gigs=$(($sectors/2/1024/1024))
+ echo "Sending /dev/$dev (${gigs} GB) to remote machine"
+
+ dd if=/dev/mapper/snap_$dev |
+ case "$remote_transport" in
+ ssh)
+ ssh -p "$remote_port" "$remote_host" \
+ "cat > $remote_directory/$name"
+ ;;
+ tcp)
+ echo "p2v $name $sectors" > header
+ cat header - | nc "$remote_host" "$remote_port"
+ ;;
+ esac
+done
+
+
+#----------------------------------------------------------------------
+# Clean up.
+#for d in $devices_to_send; do
+# kpartx -d /dev/mapper/snap_$d
+# drop_snapshot snap_$d
+#done
# This file must end with a newline
git.annexia.org / virt-p2v.git / blobdiff