# 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 devices to send, separated by spaces, if empty ask user
+# 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_devices_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
+# - "auto" means try to autoconfigure from root filesystem
+# (XXX needs to contain more ways to override in future)
+override_network=""
#----------------------------------------------------------------------
# Logging.
}
#----------------------------------------------------------------------
+# I/O functions
+
+# Use the function read_line instead of the shell built-in read.
+# It reads from the console.
+function read_line {
+ read "$*" </dev/console
+}
+
+# Launch a bash subshell connected to the console.
+function shell {
+ PS1='\u@\h:\w\$ ' bash </dev/console >/dev/console 2>&1
+}
+
+#----------------------------------------------------------------------
# Device mapper snapshotting.
+next_ramdisk=1
+
# Create a device-mapper snapshot of a device with ramdisk overlay.
# Example:
# snapshot sda1 snap
# creates a snapshot of /dev/sda1 called /dev/mapper/snap
-
-
-# XXX Error checking.
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`
dmsetup create ${name}_org \
--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 an existing snapshot created by snapshot function.
# 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/${name}_org
}
}
#----------------------------------------------------------------------
+# Network configuration functions.
+
+# `auto_network' tries to configure the network from the
+# root filesystem. Returns true or false.
+function auto_network {
+ # Make sure this file exists, otherwise Fedora gives a warning.
+ touch /etc/resolv.conf
+
+ pushd /etc/sysconfig
+
+ mv network network.saved
+ mv networking networking.saved
+ mv network-scripts network-scripts.saved
+
+ # Originally I symlinked these, but that causes dhclient to
+ # keep open /mnt/root (as its cwd is in network-scripts subdir).
+ # So now we will copy them recursively instead.
+ cp -r /mnt/root/etc/sysconfig/network .
+ cp -r /mnt/root/etc/sysconfig/networking .
+ cp -r /mnt/root/etc/sysconfig/network-scripts .
+
+ /etc/init.d/network start
+ local status=$?
+
+ rm -rf network networking network-scripts
+ mv network.saved network
+ mv networking.saved networking
+ mv network-scripts.saved network-scripts
+
+ popd
+
+ ping -c 3 $remote_host
+
+ if [ "$greeting" != "no" ]; then
+ echo "Did automatic network configuration work?"
+ echo "(Hint: if not sure, there is a shell on console [ALT] [F2])"
+ echo -n " (y/n) "
+ local line
+ read_line line </dev/console
+ if [ "$line" = "y" -o "$line" = "yes" ]; then return 0; fi
+ return 1
+ fi
+
+ # In non-interactive mode, return the status of /etc/init.d/network.
+ return $status
+}
+
+
+#----------------------------------------------------------------------
# General script setup.
# We can safely write files into /tmp without modifying anything.
fi
fi
;;
+
+ # Block devices configuration.
devices)
if [ -n "$override_devices_to_send" ]; then
devices_to_send="$override_devices_to_send"
- state=roots
+ state=root
else
- # Returns the list of possible devices in $devices
+ # Returns the list of physical devices in $devices
search_devices
log devices returned by search_devices: $devices
else
stat=off
fi
- deviceslist="$deviceslist $d /dev/$d $stat"
+ gigs=$(($(blockdev --getsize /dev/$d)/2/1024/1024))
+ deviceslist="$deviceslist $d /dev/$d(${gigs}GB) $stat"
done
dialog \
--extra-button --extra-label "Back" --nocancel \
--single-quoted \
- --checklist "Pick which local disk images to send" 10 50 5 \
+ --checklist "Pick disks to send" 15 50 8 \
$deviceslist \
2> line
if [ $? -eq 3 ]; then state=directory
else
devices_to_send=`cat line`
- state=roots
- log user selected devices_to_send = $devices_to_send
+ state=root
fi
fi
;;
- roots)
- if [ -n "$override_root_filesystems" ]; then
- root_filesystems="$override_root_filesystems"
- state=verify
+
+ # Root filesystem.
+ root)
+ if [ -n "$override_root_filesystem" ]; then
+ root_filesystem="$override_root_filesystem"
+ state=network
else
# Returns the list of possible partitions / LVs in $parts
search_parts $devices_to_send
- log filesystems returned by search_parts: $parts
+ log partitions returned by search_parts: $parts
- if [ -z "$parts" ]; then
- root_filesystems=""
- state=verify
- else
- partslist=""
- for r in $parts; do
- if word_in_list $r $root_filesystems; then
- stat=on
- else
- stat=off
- fi
- partslist="$partslist $r /dev/$r $stat"
- done
-
- dialog \
- --extra-button --extra-label "Back" --nocancel \
- --single-quoted \
- --checklist "Pick partition(s) containing root (/) filesystem" 10 70 5 \
- $partslist \
- 2> line
- if [ $? -eq 3 ]; then state=devices
+ partslist=""
+ for r in $parts; do
+ if word_in_list $r $root_filesystem; then
+ stat=on
else
- root_filesystems=`cat line`
- state=verify
- log user selected root_filesystems = $root_filesystems
+ stat=off
fi
+ partslist="$partslist $r /dev/$r $stat"
+ done
+
+ dialog \
+ --extra-button --extra-label "Back" --nocancel \
+ --single-quoted \
+ --radiolist "Pick partition containing the root (/) filesystem" 10 70 5 \
+ $partslist \
+ 2> line
+ if [ $? -eq 3 ]; then state=devices
+ else
+ root_filesystem=`cat line`
+ state=network
fi
fi
;;
+
+ # Network configuration.
+ network)
+ if [ -n "$override_network" ]; then
+ network="$override_network"
+ state=verify
+ else
+ dialog \
+ --extra-button --extra-label "Back" --nocancel \
+ --radiolist "Network configuration" 10 70 5 \
+ "auto" "Auto-configure from root filesystem" on \
+ "ask" "Manual configuration" off \
+ "sh" "Configure from the shell" off \
+ 2> line
+ if [ $? -eq 3 ]; then state=root
+ else
+ network=`cat line`
+ state=verify
+ fi
+ fi
+ ;;
+
+ # Verify configuration.
verify)
if [ "$greeting" = "no" ]; then
state=exit
else
dialog \
--title "Summary" \
- --yesno "Transport: $remote_transport\nRemote host: $remote_host\nRemote port: $remote_port\nRemote directory (ssh only): $remote_directory\nDisks to send: $devices\nRoot filesystem(s): $root_filesystems\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
-# Mount the root filesystem(s) using device-mapper snapshots.
-# For example, if asked to examine VolGroup00/LogVol00, then
-# we might find that it is located on physical device sda, and
-# the snapshot in that case will be called sda_snap.
+#----------------------------------------------------------------------
+# 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 $network
+
+case "$network" in
+ sh)
+ echo "Network configuration"
+ echo
+ echo "Please configure the network from this shell."
+ echo
+ echo "When finished, exit with ^D or exit"
+ echo
+ shell
+ ;;
+
+ ask)
+ # XXX Not implemented
+ echo "Sorry, we didn't implement this one yet."
+ shell
+ ;;
+
+ auto)
+ echo "Trying to auto-configure network from root filesystem ..."
+ echo
+ if ! auto_network; then
+ echo "Auto-configuration failed. Starting a shell."
+ echo
+ shell
+ fi
+esac
+
+#----------------------------------------------------------------------
+# 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