# 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
+#
# $Id$
+# Because we're running from a start-up script, we don't have much
+# of a login environment, so set one up.
export PATH=/usr/sbin:/sbin:/usr/local/bin:/usr/kerberos/bin:/usr/bin:/bin
+export HOME=/root
+export LOGNAME=root
# The defaults here make a generic virt-p2v.sh script, but if you want
# to build a partially-/fully-automatic P2V solution, then you can set
override_network=""
#----------------------------------------------------------------------
-# Logging.
+# General script setup and logging.
+
+exec 2>> /tmp/virt-p2v.log
function log {
- echo "$@" >> /tmp/virt-p2v.log
+ echo "$@" 1>&2
}
+log
+log virt-p2v starting up at `date`
+
+# The first and only parameter must be the tty. Connect
+# stdin/stdout to this device.
+if [ -n "$1" ]; then
+ log connecting to /dev/$1
+ exec </dev/$1 >/dev/$1
+fi
+
+# We can safely write files into /tmp without modifying anything.
+cd /tmp
+
#----------------------------------------------------------------------
# Helper functions.
# Use the function read_line instead of the shell built-in read.
# It reads from the console.
function read_line {
- read "$*" </dev/console
+ read "$*"
}
# Launch a bash subshell connected to the console.
function shell {
- PS1='\u@\h:\w\$ ' bash </dev/console >/dev/console 2>&1
+ PS1='\u@\h:\w\$ ' bash
}
#----------------------------------------------------------------------
# Get list of physical block devices. Sets variable $devices
# to something like "sda sdb".
function search_devices {
- devices=$(cd /sys/block && /bin/ls -d [hs]d*)
+ devices1=$(cd /sys/block && /bin/ls -d [hs]d*)
+ log search_devices: devices1: $devices1
+ # Ignore devices which fail 'blockdev --getsize' - probably
+ # removable devices or other strange ones.
+ devices=""
+ for d in $devices1; do
+ if blockdev --getsize /dev/$d > /dev/null; then
+ devices="$devices${devices:+ }$d"
+ fi
+ done
+ log search_devices: devices: $devices
}
# Get list of partitions from a physical block device. Sets
# $parts is returned.
}
+# This generates a snapshot device name from a device name.
+# eg. sda -> snap_sda
+# Sets $dname.
+function snap_name {
+ dname=`echo -n snap_"$1" | tr -cs '[:alnum:]' _`
+}
+
#----------------------------------------------------------------------
# Network configuration functions.
-# `auto_network $fs' tries to configure the network from the
+# `auto_network' tries to configure the network from the
# root filesystem. Returns true or false.
function auto_network {
# Make sure this file exists, otherwise Fedora gives a warning.
echo "(Hint: if not sure, there is a shell on console [ALT] [F2])"
echo -n " (y/n) "
local line
- read_line line </dev/console
+ read_line line
if [ "$line" = "y" -o "$line" = "yes" ]; then return 0; fi
return 1
fi
return $status
}
-
-#----------------------------------------------------------------------
-# General script setup.
-
-# We can safely write files into /tmp without modifying anything.
-cd /tmp
-
#----------------------------------------------------------------------
# Dialog with the user.
-log
-log virt-p2v starting up at `date`
-
if [ "$greeting" != "no" ]; then
dialog \
--title "virt-p2v" \
else
stat=off
fi
+ log running blockdev --getsize /dev/$d
gigs=$(($(blockdev --getsize /dev/$d)/2/1024/1024))
+ log /dev/$d has size $gigs
deviceslist="$deviceslist $d /dev/$d(${gigs}GB) $stat"
done
+ log deviceslist="$deviceslist"
dialog \
--extra-button --extra-label "Back" --nocancel \
clear
+#----------------------------------------------------------------------
# De-activate all volume groups and switch to new dm-only LVM config.
log deactivating volume groups
# Snapshot the block devices.
for d in $devices_to_send; do
- log snapshotting block device /dev/$d ...
+ snap_name $d
+ log snapshotting block device /dev/$d to $dname ...
- snapshot $d snap_$d
+ snapshot $d $dname
# The block devices are whole disks. Use kpartx to repartition them.
- log running kpartx -a /dev/mapper/snap_$d ...
- kpartx -a /dev/mapper/snap_$d
+ log running kpartx -a /dev/mapper/$dname ...
+ kpartx -a /dev/mapper/$dname
done
# Rescan for LVs.
log mount $root_filesystem as /mnt/root
-if [ -f /dev/mapper/snap_$root_filesystem ]; then
- mount /dev/mapper/snap_$root_filesystem /mnt/root
+snap_name $root_filesystem
+root_filesystem_dname="$dname"
+
+if [ -b /dev/mapper/$root_filesystem_dname ]; then
+ mount /dev/mapper/$root_filesystem_dname /mnt/root
else
mount /dev/$root_filesystem /mnt/root
fi
+#----------------------------------------------------------------------
# Now see if we can get a network configuration.
log network configuration $network
;;
auto)
- echo "Trying to auto-configure network from /dev/$network ..."
+ echo "Trying to auto-configure network from root filesystem ..."
echo
- if ! auto_network "$network"; then
+ if ! auto_network; then
echo "Auto-configuration failed. Starting a shell."
echo
shell
fi
esac
+#----------------------------------------------------------------------
+# Rewrite /mnt/root/etc/fstab
+log rewriting /etc/fstab
+cp /mnt/root/etc/fstab /mnt/root/etc/fstab.p2vsaved
+while read dev mountpoint fstype options freq passno; do
+ # If device is /dev/sd* then on the target fullvirt machine
+ # it will be /dev/hd*
+ if matches_regexp "^/dev/sd[[:alpha:]]+[[:digit:]]+$" "$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
+
+ snap_name $dev
+
+ sectors=`blockdev --getsize /dev/mapper/$dname`
+
+ gigs=$(($sectors/2/1024/1024))
+ echo "Sending /dev/$dev (${gigs} GB) to remote machine"
+
+ dd if=/dev/mapper/$dname | gzip --best |
+ case "$remote_transport" in
+ ssh)
+ ssh -p "$remote_port" "$remote_host" \
+ "zcat > $remote_directory/$name"
+ ;;
+ tcp)
+ echo "p2v $name $sectors" > header
+ echo > newline
+ cat header - newline | nc "$remote_host" "$remote_port"
+ ;;
+ esac
+done
+
+
#----------------------------------------------------------------------
# Clean up.
-umount /mnt/root
-drop_snapshot snap
+#for d in $devices_to_send; do
+# snap_name $d
+# kpartx -d /dev/mapper/$dname
+# drop_snapshot $dname
+#done
# This file must end with a newline
git.annexia.org / virt-p2v.git / blobdiff