[Debian] Re: Bug#494890: extra information
Ola Lundqvist
ola at inguza.com
Thu Aug 14 07:32:52 EDT 2008
Hi Alexander
On Thu, Aug 14, 2008 at 01:04:10PM +0200, Alexander Prinsier wrote:
> Ola Lundqvist schreef:
> >Hi Alexander
> >
> >I think it would be good to know the following:
> >* A copy of your vzmigrate script as it was modified. It is hard to tell
> > exactly what line that caused the problem otherwise.
>
> I attached the modified vzmigrate. Only one line was modified.
>
> >* All your "unusual setup", to know such things as /backup2 etc. Are
> > everything in /backup2 or is some parts in other places?
>
> Well the only unusual thing is that when I wanted to try out OpenVZ, I
> had no separate partition to put it on, and /backup2 was the only one
> with enouph space.
Ok.
> From /etc/vz/vz.conf:
>
> LOCKDIR=/backup2/OpenVZ/lock
> DUMPDIR=/backup2/OpenVZ/dump
> TEMPLATE=/backup2/OpenVZ/template
> VE_ROOT=/backup2/OpenVZ/root/$VEID
> VE_PRIVATE=/backup2/OpenVZ/private/$VEID
Looks ok to me.
> Just to rule this out: /backup2 doesn't have much free space left. It
> shouldn't crash when it runs out of space right?
Well it is not supposed to crash ever, but that could be the case.
> I'm running kernel 2.6.18-028stab035.1-ovz-smp from the debian.systs.org
> repository.
Ok, thanks. I'll add Thorsten Schifferdecker that has built that version
of the kernel to this discussion. There is a crash in the kernel and he
may know about this. I have also added the openvz project people to see
if they know any such issues.
Hope they can help to see if there are any such known faults.
Best regards,
// Ola
> Alexander
> #!/bin/sh
> # Copyright (C) 2000-2007 SWsoft. All rights reserved.
> #
> # 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
> #
> #
> # vzmigrate is used for VE migration to another node
> #
> # Usage:
> # vzmigrate [-r yes|no] [--ssh=<options>] [--keep-dst] [--online] [-v]
> # destination_address VEID
> # Options:
> # -r, --remove-area yes|no
> # Whether to remove VE on source HN for successfully migrated VE.
> # --ssh=<ssh options>
> # Additional options that will be passed to ssh while establishing
> # connection to destination HN. Please be careful with options
> # passed, DO NOT pass destination hostname.
> # --keep-dst
> # Do not clean synced destination VE private area in case of some
> # error. It makes sense to use this option on big VE migration to
> # avoid syncing VE private area again in case some error
> # (on VE stop for example) occurs during first migration attempt.
> # --online
> # Perform online (zero-downtime) migration: during the migration the
> # VE hangs for a while and after the migration it continues working
> # as though nothing has happened.
> # -v
> # Verbose mode. Causes vzmigrate to print debugging messages about
> # its progress (including some time statistics).
> #
> # Examples:
> # Online migration of VE #101 to foo.com:
> # vzmigrate --online foo.com 101
> # Migration of VE #102 to foo.com with downtime:
> # vzmigrate foo.com 102
> # NOTE:
> # This program uses ssh as a transport layer. You need to put ssh
> # public key to destination node and be able to connect without
> # entering a password.
>
>
> ACT_SCRIPTS_SFX="start stop mount umount"
> SSH_OPTIONS=""
> SSH="ssh $SSH_OPTIONS"
> SCP_OPTIONS=""
> SCP="scp $SCP_OPTIONS"
> RSYNC_OPTIONS="-aH --delete --numeric-ids"
> RSYNC="rsync $RSYNC_OPTIONS"
>
> online=0
> verbose=0
> remove_area=1
> keep_dst=0
> debug=0
> confdir="/etc/vz/conf"
> vzconf="/etc/vz/vz.conf"
> tmpdir="/var/tmp"
> act_scripts=
>
> # Errors:
> MIG_ERR_USAGE=1
> MIG_ERR_VPS_IS_STOPPED=2
> MIG_ERR_CANT_CONNECT=4
> MIG_ERR_COPY=6
> MIG_ERR_START_VPS=7
> MIG_ERR_STOP_SOURCE=8
> MIG_ERR_EXISTS=9
> MIG_ERR_NOEXIST=10
> MIG_ERR_IP_IN_USE=12
> MIG_ERR_QUOTA=13
> MIG_ERR_CHECKPOINT=$MIG_ERR_STOP_SOURCE
> MIG_ERR_MOUNT_VPS=$MIG_ERR_START_VPS
> MIG_ERR_RESTORE_VPS=$MIG_ERR_START_VPS
> MIG_ERR_OVZ_NOT_RUNNING=14
> MIG_ERR_APPLY_CONFIG=15
>
> usage() {
> cat >&2 <<EOF
> This program is used for VE migration to another node
> Usage:
> vzmigrate [-r yes|no] [--ssh=<options>] [--keep-dst] [--online] [-v]
> destination_address <VEID>
> Options:
> -r, --remove-area yes|no
> Whether to remove VE on source HN for successfully migrated VE.
> --ssh=<ssh options>
> Additional options that will be passed to ssh while establishing
> connection to destination HN. Please be careful with options
> passed, DO NOT pass destination hostname.
> --keep-dst
> Do not clean synced destination VE private area in case of some
> error. It makes sense to use this option on big VE migration to
> avoid syncing VE private area again in case some error
> (on VE stop for example) occurs during first migration attempt.
> --online
> Perform online (zero-downtime) migration: during the migration the
> VE hangs for a while and after the migration it continues working
> as though nothing has happened.
> -v
> Verbose mode. Causes vzmigrate to print debugging messages about
> its progress (including some time statistics).
> EOF
> exit $MIG_ERR_USAGE
> }
>
> # Logs message
> # There are 3 types of messages:
> # 0 - error messages (print to stderr)
> # 1 - normal messages (print to stdout)
> # 2 - debug messages (print to stdout if in verbose mode)
> log () {
> if [ $1 -eq 0 ]; then
> shift
> echo -e "Error: " $@ >&2
> elif [ $1 -eq 1 ]; then
> shift
> echo -e $@
> elif [ $verbose -eq 1 ]; then
> shift
> echo -e " " $@
> fi
> }
>
> # Executes command and returns result of execution
> # There are 2 types of execution:
> # 1 - normal execution (all output will be printed)
> # 2 - debug execution (output will be printed if verbose mode is set,
> # in other case stdout and stderr redirected to /dev/null)
> logexec () {
> if [ $1 -eq 1 -o $verbose -eq 1 ]; then
> shift
> $@
> else
> shift
> $@ >/dev/null 2>&1
> fi
> }
>
> undo_conf () {
> $SSH "root@$host" "rm -f $vpsconf"
> }
>
> undo_act_scripts () {
> if [ -n "$act_scripts" ] ; then
> $SSH "root@$host" "rm -f $act_scripts"
> fi
> undo_conf
> }
>
> undo_private () {
> if [ $keep_dst -eq 0 ]; then
> $SSH "root@$host" "rm -rf $VE_PRIVATE"
> fi
> undo_act_scripts
> }
>
> undo_root () {
> $SSH "root@$host" "rm -rf $VE_ROOT"
> undo_private
> }
>
> undo_quota_init () {
> [ "${DISK_QUOTA}" = 'no' ] || $SSH "root@$host" "vzquota drop $VEID"
> undo_root
> }
>
> undo_quota_on () {
> [ "${DISK_QUOTA}" = 'no' ] || $SSH "root@$host" "vzquota off $VEID"
> undo_quota_init
> }
>
> undo_sync () {
> # Root will be destroed in undo_root
> undo_quota_on
> }
>
> undo_suspend () {
> logexec 2 vzctl chkpnt $VEID --resume
> undo_sync
> }
>
> undo_dump () {
> if [ $debug -eq 0 ]; then
> rm -f "$VE_DUMPFILE"
> fi
> undo_suspend
> }
>
> undo_copy_dump () {
> $SSH "root@$host" "rm -f $VE_DUMPFILE"
> undo_suspend
> }
>
> undo_stop () {
> if [ "$state" = "running" ]; then
> vzctl start $VEID
> elif [ "$mounted" = "mounted" ]; then
> vzctl mount $VEID
> fi
> undo_sync
> }
>
> undo_source_stage() {
> if [ $online -eq 1 ]; then
> undo_copy_dump
> else
> undo_stop
> fi
> }
>
> undo_quota_dump () {
> rm -f "$VE_QUOTADUMP"
> undo_source_stage
> }
>
> undo_copy_quota () {
> $SSH "root@$host" "rm -f $VE_QUOTADUMP"
> undo_quota_dump
> }
>
> undo_undump () {
> logexec 2 $SSH root@$host vzctl restore $VEID --kill
> undo_copy_quota
> }
>
> get_status() {
> exist=$3
> mounted=$4
> state=$5
> }
>
> get_time () {
> awk -v t2=$2 -v t1=$1 'BEGIN{print t2-t1}'
> }
>
> if [ $# -lt 2 ]; then
> usage
> fi
>
> while [ ! -z "$1" ]; do
> log 1 "OPT:$1"
> case "$1" in
> --online)
> online=1
> ;;
> -v)
> verbose=1
> ;;
> --remove-area|-r)
> shift
> if [ "$1" = "yes" ]; then
> remove_area=1
> elif [ "$1" = "no" ]; then
> remove_area=0
> else
> usage
> fi
> ;;
> --keep-dst)
> keep_dst=1
> ;;
> --ssh=*)
> SSH_OPTIONS="$SSH_OPTIONS $(echo $1 | cut -c7-)"
> SSH="ssh $SSH_OPTIONS"
> SCP_OPTIONS="`echo $SSH_OPTIONS | sed 's/-p/-P/1'`"
> SCP="scp $SCP_OPTIONS"
> ;;
> *)
> break
> ;;
> esac
> shift
> done
>
> host=$1
> shift
> VEID=$1
> shift
>
> if [ -z "$host" -o -z "$VEID" -o $# -ne 0 ]; then
> usage
> fi
>
> vpsconf="$confdir/$VEID.conf"
>
> if [ ! -r "$vzconf" -o ! -r "$vpsconf" ]; then
> log 0 "Can't read global config or VE #$VEID config file"
> exit $MIG_ERR_NOEXIST
> fi
>
> get_status $(vzctl status $VEID)
> if [ "$exist" = "deleted" ]; then
> log 0 "VE #$VEID doesn't exist"
> exit $MIG_ERR_NOEXIST
> fi
>
> if [ $online -eq 1 ]; then
> log 1 "Starting online migration of VE $VEID on $host"
> else
> log 1 "Starting migration of VE $VEID on $host"
> fi
>
> # Try to connect to destination
> if ! logexec 2 $SSH -o BatchMode=yes root@$host /bin/true; then
> log 0 "Can't connect to destination address using public key"
> log 0 "Please put your public key to destination node"
> exit $MIG_ERR_CANT_CONNECT
> fi
>
> # Check if OpenVZ is running
> if ! logexec 2 $SSH -o BatchMode=yes root@$host /etc/init.d/vz status ; then
> log 0 "OpenVZ is not running on the target machine"
> log 0 "Can't continue migration"
> exit $MIG_ERR_OVZ_NOT_RUNNING
> fi
>
> # Check if CPT modules are loaded for online migration
> if [ $online -eq 1 ]; then
> if [ ! -f /proc/cpt ]; then
> log 0 "vzcpt module is not loaded on the source node"
> log 0 "Can't continue online migration"
> exit $MIG_ERR_OVZ_NOT_RUNNING
> fi
> if ! logexec 2 $SSH -o BatchMode=yes root@$host "test -f /proc/rst";
> then
> log 0 "vzrst module is not loaded on the destination node"
> log 0 "Can't continue online migration"
> exit $MIG_ERR_OVZ_NOT_RUNNING
> fi
> fi
>
> dst_exist=$($SSH "root@$host" "vzctl status $VEID" | awk '{print $3}')
> if [ "$dst_exist" = "exist" ]; then
> log 0 "VE #$VEID already exists on destination node"
> exit $MIG_ERR_EXISTS
> fi
>
> if [ $online -eq 1 -a "$state" != "running" ]; then
> log 0 "Can't perform online migration of stopped VE"
> exit $MIG_ERR_VPS_IS_STOPPED
> fi
>
> log 2 "Loading $vzconf and $vpsconf files"
>
> . "$vzconf"
> . "$vpsconf"
> VE_DUMPFILE="$tmpdir/dump.$VEID"
> VE_QUOTADUMP="$tmpdir/quotadump.$VEID"
>
> log 2 "Check IPs on destination node: $IP_ADDRESS"
> for IP in $IP_ADDRESS; do
> if [ $($SSH "root@$host" "grep -c \" $IP \" /proc/vz/veip") -gt 0 ];
> then
> log 0 "IP address $IP already in use on destination node"
> exit $MIG_ERR_IP_IN_USE
> fi
> done
>
> log 1 "Preparing remote node"
>
> log 2 "Copying config file"
> if ! logexec 2 $SCP $vpsconf root@$host:$vpsconf ; then
> log 0 "Failed to copy config file"
> exit $MIG_ERR_COPY
> fi
>
> logexec 2 $SSH root@$host vzctl set $VEID --applyconfig_map name --save
> # vzctl return code 20 or 21 in case of unrecognized option
> #ALEX: zie https://bugzilla.altlinux.org/show_bug.cgi?id=15085
> #if [ $? != 20 && $? != 21 && $? != 0 ]; then
> if [ $? != 20 ] && [ $? != 21 ] && [ $? != 0 ]; then
> log 0 "Failed to apply config on destination node"
> undo_conf
> exit $MIG_ERR_APPLY_CONFIG
> fi
>
> for sfx in $ACT_SCRIPTS_SFX; do
> file="$confdir/$VEID.$sfx"
> if [ -f "$file" ]; then
> act_scripts="$act_scripts $file"
> fi
> done
> if [ -n "$act_scripts" ]; then
> log 2 "Copying action scripts"
> if ! logexec 2 $SCP $act_scripts root@$host:$confdir ; then
> log 0 "Failed to copy action scripts"
> undo_conf
> exit $MIG_ERR_COPY
> fi
> fi
>
> log 2 "Creating remote VE root dir"
> if ! $SSH "root@$host" "mkdir -p $VE_ROOT"; then
> log 0 "Failed to make VE root"
> undo_act_scripts
> exit $MIG_ERR_COPY
> fi
>
> log 2 "Creating remote VE private dir"
> if ! $SSH "root@$host" "mkdir -p $VE_PRIVATE"; then
> log 0 "Failed to make VE private area"
> undo_private
> exit $MIG_ERR_COPY
> fi
>
> if [ "${DISK_QUOTA}" != "no" ]; then
> log 1 "Initializing remote quota"
>
> log 2 "Quota init"
> if ! $SSH "root@$host" "vzctl quotainit $VEID"; then
> log 0 "Failed to initialize quota"
> undo_root
> exit $MIG_ERR_QUOTA
> fi
>
> log 2 "Turning remote quota on"
> if ! $SSH "root@$host" "vzctl quotaon $VEID"; then
> log 0 "Failed to turn quota on"
> undo_quota_init
> exit $MIG_ERR_QUOTA
> fi
> else
> log 2 "VZ disk quota disabled -- skipping quota migration"
> fi
>
> log 1 "Syncing private"
> if ! $RSYNC --progress \
> "$VE_PRIVATE" "root@$host:${VE_PRIVATE%/*}" |
> grep "% of" | awk -v ORS="\r" '{print $10}'; then
> log 0 "Failed to sync VE private areas"
> undo_quota_on
> exit $MIG_ERR_COPY
> fi
>
> if [ $online -eq 1 ]; then
> log 1 "Live migrating VE"
>
> log 2 "Suspending VE"
> time_suspend=$(date +%s.%N)
> if ! logexec 2 vzctl chkpnt $VEID --suspend ; then
> log 0 "Failed to suspend VE"
> undo_sync
> exit $MIG_ERR_CHECKPOINT
> fi
>
> log 2 "Dumping VE"
> if ! logexec 2 vzctl chkpnt $VEID --dump --dumpfile $VE_DUMPFILE ; then
> log 0 "Failed to dump VE"
> undo_suspend
> exit $MIG_ERR_CHECKPOINT
> fi
>
> log 2 "Copying dumpfile"
> time_copy_dump=$(date +%s.%N)
> if ! logexec 2 $SCP $VE_DUMPFILE root@$host:$VE_DUMPFILE ; then
> log 0 "Failed to copy dump"
> undo_dump
> exit $MIG_ERR_COPY
> fi
> else
> if [ "$state" = "running" ]; then
> log 1 "Stopping VE"
> if ! logexec 2 vzctl stop $VEID ; then
> log 0 "Failed to stop VE"
> undo_sync
> exit $MIG_ERR_STOP_SOURCE
> fi
> elif [ "$mounted" = "mounted" ]; then
> log 1 "Unmounting VE"
> if ! logexec 2 vzctl umount $VEID ; then
> log 0 "Failed to umount VE"
> undo_sync
> exit $MIG_ERR_STOP_SOURCE
> fi
> fi
> fi
>
> if [ "$state" = "running" ]; then
> log 2 "Syncing private (2nd pass)"
> time_rsync2=$(date +%s.%N)
> if ! $RSYNC \
> "$VE_PRIVATE" "root@$host:${VE_PRIVATE%/*}"; then
> log 0 "Failed to sync VE private areas"
> undo_source_stage
> exit $MIG_ERR_COPY
> fi
> fi
>
> if [ "${DISK_QUOTA}" != "no" ]; then
> log 1 "Syncing 2nd level quota"
>
> log 2 "Dumping 2nd level quota"
> time_quota=$(date +%s.%N)
> if ! vzdqdump $VEID -U -G -T > "$VE_QUOTADUMP"; then
> log 0 "Failed to dump 2nd level quota"
> undo_quota_dump
> exit $MIG_ERR_QUOTA
> fi
>
> log 2 "Copying 2nd level quota"
> if ! logexec 2 $SCP $VE_QUOTADUMP root@$host:$VE_QUOTADUMP ; then
> log 0 "Failed to copy 2nd level quota dump"
> undo_quota_dump
> exit $MIG_ERR_COPY
> fi
>
> log 2 "Load 2nd level quota"
> if ! $SSH "root@$host" "(vzdqload $VEID -U -G -T < $VE_QUOTADUMP &&
> vzquota reload2 $VEID)"; then
> log 0 "Failed to load 2nd level quota"
> undo_copy_quota
> exit $MIG_ERR_QUOTA
> fi
> else
> log 2 "VZ disk quota disabled -- skipping quota migration"
> fi
>
> if [ $online -eq 1 ]; then
> log 2 "Undumping VE"
> time_undump=$(date +%s.%N)
> if ! logexec 2 $SSH root@$host vzctl restore $VEID --undump \
> --dumpfile $VE_DUMPFILE --skip_arpdetect ; then
> log 0 "Failed to undump VE"
> undo_copy_quota
> exit $MIG_ERR_RESTORE_VPS
> fi
>
> log 2 "Resuming VE"
> if ! logexec 2 $SSH root@$host vzctl restore $VEID --resume ; then
> log 0 "Failed to resume VE"
> undo_undump
> exit $MIG_ERR_RESTORE_VPS
> fi
> time_finish=$(date +%s.%N)
> log 2 "Times:"
> log 2 "\tSuspend + Dump:\t" $(get_time $time_suspend $time_copy_dump)
> log 2 "\tCopy dump file:\t" $(get_time $time_copy_dump $time_rsync2)
> log 2 "\tSecond rsync:\t" $(get_time $time_rsync2 $time_quota)
> log 2 "\t2nd level quota:\t" $(get_time $time_quota $time_undump)
> log 2 "\tUndump + Resume:\t" $(get_time $time_undump $time_finish)
> log 2 "Total time: " $(get_time $time_suspend $time_finish)
>
> log 1 "Cleanup"
>
> log 2 "Killing VE"
> logexec 2 vzctl chkpnt $VEID --kill
> logexec 2 vzctl umount $VEID
>
> log 2 "Removing dumpfiles"
> rm -f "$VE_DUMPFILE"
> $SSH "root@$host" "rm -f $VE_DUMPFILE"
> else
> if [ "$state" = "running" ]; then
> log 1 "Starting VE"
> if ! logexec 2 $SSH root@$host vzctl start $VEID ; then
> log 0 "Failed to start VE"
> undo_copy_quota
> exit $MIG_ERR_START_VPS
> fi
> elif [ "$mounted" = "mounted" ]; then
> log 1 "Mounting VE"
> if ! logexec 2 $SSH root@$host vzctl mount $VEID ; then
> log 0 "Failed to mount VE"
> undo_copy_quota
> exit $MIG_ERR_MOUNT_VPS
> fi
> else
> log 1 "Turning quota off"
> if ! logexec 2 $SSH root@$host vzquota off $VEID ; then
> log 0 "failed to turn quota off"
> undo_copy_quota
> exit $MIG_ERR_QUOTA
> fi
> fi
>
> log 1 "Cleanup"
> fi
>
> if [ $remove_area -eq 1 ]; then
> log 2 "Destroying VE"
> logexec 2 vzctl destroy $VEID
> else
> # Move config as veid.migrated to allow backward migration
> mv -f $vpsconf $vpsconf.migrated
> fi
--
--- Inguza Technology AB --- MSc in Information Technology ----
/ ola at inguza.com Annebergsslingan 37 \
| opal at debian.org 654 65 KARLSTAD |
| http://inguza.com/ Mobile: +46 (0)70-332 1551 |
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