source: npl/syn3/backup/restore @ b26e5aa

#!/bin/bash
#Restore script for Syn-3 (C)DatuX 
source /etc/backup.conf || exit 1
source $SCRIPTDIR/backuplib || exit 1

FILE=$1
if ! [ "$FILE" ]; then
        echo "Usage: $0 <filetorestore>"
        echo "The file should exist on the configured backup medium in /etc/backup.conf"
        echo "WARNING: This WILL format your $BACKUPDEV!"
        exit 1
fi

cd /

#exit if already running
CheckRunning


#stdout will go to logs from this point
exec &> $LOG

ulimit -n 100000
trap terminated 2 15 1

terminated()
{
        echo "STAT:Restore session aborted!"
        if [ "$1" ]; then
                echo "$1";
        fi
        syn3-state backup ALERT "Restore aborted! Your system is unusable right now, try restoring again."
        exit 1
}

#devfs en udev are different, solve it this way
vgscan --mknodes &> /dev/null

echo "INFO:Restore started at `date`"
echo "INFO:Restoring $FILE"
syn3-state backup ALERT "Disaster restore started. Your system is unusable until the restore has completed."

############################# 
echo "STAT:Preparing $BACKUPDEV"

echo "INFO:Killing all services that use $BACKUPMNT"
#shut them all down except ssh
svc -d /service/* /service/*/log
svc -u /service/sshd
#force kill them all
kill -9 `lsof -F p $BACKUPMNT|cut -c2-` &>/dev/null
sleep 5


#TODO: maybe we skip the whole formatting and just use a rm -rf for other modes?
#rsync is cabable of deleting stuff itself and can continue restoring in case of an interruption
if [ $mode != "rsync" ]; then
        echo "INFO:Unmounting $BACKUPMNT"
        umount $BACKUPMNT >/dev/null
        if cat /proc/mounts |cut -f2 -d' '|grep -x $BACKUPMNT >/dev/null; then
                echo "Cannot unmount $BACKUPMNT"
                terminated
        fi
        echo "INFO:Formatting..."
        mkfs.xfs -f $BACKUPDEV >/dev/null || terminated

        echo "INFO:Mounting..."
        mount $BACKUPMNT || terminated
fi

##################################
echo "STAT:Restoring data"
rm -r /var/lib/xfsdump/ &>/dev/null

echo "INFO:Transferring data..."

#this block should output the errors of the operation so that
#the while loop can read them
(
        if [ $mode == "smb" ]; then
                smbclient --timeout 3600 -s /dev/null --stderr -c "get $FILE -" -U "$smbuser" -W "$smbdomain" "//$smbserver/$smbshare" "$smbpasswd" | gunzip | xfsrestore -o -p 10 -F - $BACKUPMNT || terminated 
                [ "${PIPESTATUS[0]}" != "0" ] && terminated "Error while reading from fileserver."
                exit 0
        elif [ $mode == "tape" ]; then
                xfsrestore -L "$FILE" -o -p 10 -F -f $TAPEDEV $BACKUPMNT || terminated
        elif [ $mode == "usbtape" ]; then
                xfsrestore -L "$FILE" -o -b 65536 -p 10 -F -f $TAPEDEV $BACKUPMNT || terminated
        elif [ $mode == "rsync" ]; then
                export PASSWD="$rsyncpasswd"
                RSYNCSRC=`echo "$FILE" | sed 's@syn3backupmeta/syn3_.*@@'`
                /usr/backup/sshpass rsync $RSYNC_SETTINGS --rsh "$SSHCMD" -ax --numeric-ids --progress --delete --inplace --rsync-path="rsync --fake-super" "$rsyncserver:$RSYNCSRC" $BACKUPMNT/ || terminated
        else
                echo "Backupmode $mode is unknown!";
                terminated 
        fi
) 2>&1 | 
#analyse the output of the above block
while read LINE; do 
        ProcXfsOutput "$LINE" || terminated
done 

#something went wrong?
if [ "${PIPESTATUS[0]}${PIPESTATUS[1]}" != "00" ]; then
        exit 1
fi

##################################
###### create special files to let the restore-magic happend during reboot:
#Look at: http://open.syn3.nl/syn3/trac/default/wiki/SynBackup for technical details.

#we have a systembackup to restore? 
if [ -e $BACKUPMNT/.syn3systembackup ]; then
        #touch this file so the initrd will format / and /boot and copy the data there.
        touch /boot/.syn3restoresystem
        #for reduncany: make sure the system knows the data is consistent and the node is primary
        touch $BACKUPMNT/.syn3systembackup/boot/drbd.primary
        #make sure the post restore runs after restoring the system files
        chmod +x $BACKUPMNT/.syn3systembackup/etc/postinst.d/post.restore
else
        #make sure the restore postinstaller runs
        chmod +x /etc/postinst.d/post.restore
fi

#inicate we want the post.restore to run the restore-scripts
mkdir -p "$SPOOLDIR" 2>/dev/null
touch "$SPOOLDIR/.syn3restorespool" 2>/dev/null

sync #in case they wanna use reset ;)

echo "INFO:Data reading finshed at `date`"
echo "STAT:Data reading complete, please reboot to finish restore."

syn3-state backup ALERT "Please reboot the system and wait for the disaster recovery to finish."