examples/cron_dump_to_disk/backup

   1 #!/bin/bash
   2 #
   3 # This script will make a simple backup of the most critical partitions,
   4 # using the "dump" facility, into the backup partition.
   5 #
   6 # Run the following to make a complete backup:
   7 #
   8 # $ su -c "backup full"
   9 #
  10 # Run the following to make an incremental backup:
  11 #
  12 # $ su -c "backup inc"
  13 #
  14 # Add "nodumpdate" to run a backup but not effect the backup state
  15 # recorded in the file /var/lib/dumpdates and reported by dump -W:
  16 #
  17 # $ su -c "backup full nodumpdate"
  18 #
  19
  20 if [ "$2" = "nodumpdate" ]; then
  21    UPDATEDDATE=""
  22 else
  23    UPDATEDDATE="-u"
  24 fi
  25
  26 if [ "$1" = "full" ]; then
  27    DLEVEL="0"
  28    BTYPE="full"
  29    BACKUP="Full"
  30 elif [ "$1" = "inc" ]; then
  31    DLEVEL="1"
  32    BTYPE="inc"
  33    BACKUP="Incremental"
  34 else
  35    echo "Usage: $0 full|inc [nodumpdate]"
  36    exit 1
  37 fi
  38
  39
  40 #
  41 # Configuration Parameters
  42 #
  43
  44 BACKUPPART=${BACKUPPART:-"/backup"}
  45 BACKUPDIR=${BACKUPDIR:-"current"}
  46 DUMPLOGARCH="$BACKUPPART/backup.dump.log.gz"
  47 FSTODUMP=${FSTODUMP:-/ /var /home /mnt/hdb1 /usr}
  48 DUMPFILESMODE="0644"
  49 DUMPFILESOWN="root.root"
  50
  51 #
  52 # Start
  53 #
  54
  55 echo
  56 echo "#####################################################################"
  57 echo "Starting ${BACKUP} backup."
  58 echo "#####################################################################"
  59 echo
  60
  61
  62 #
  63 #  Make system backup
  64 #
  65
  66 echo "### ${BACKUP} System Dump Backup ###"
  67 echo "Using backup partition: $BACKUPPART"
  68 echo "Filesystems to dump: $FSTODUMP"
  69
  70 echo -n "Remounting backup partition read-write ... "
  71 if ( mount $BACKUPPART -o remount,rw &> /dev/null ) then
  72    echo "done."
  73 elif ( mount $BACKUPPART -o rw &> /dev/null ) then
  74    echo "done."
  75 else
  76    echo "failure!"
  77    echo " There were problems remounting $BACKUPPART in read-write mode!"
  78    echo "Aborting ${BACKUP} System Dump Backup."
  79    echo "Aborted."
  80    echo "-------------------------------------------------------------------------------"
  81    exit 1
  82 fi
  83
  84 echo -n "Checking backup partition for correct dir structure ... "
  85 if [ -d $BACKUPPART/$BACKUPDIR -a -w $BACKUPPART/$BACKUPDIR ]; then
  86    echo "done."
  87
  88    echo -n "Checking backup partition for available space ... "
  89    SREQ=`for i in $FSTODUMP; do dump -$DLEVEL -S $i 2> /dev/null; done | awk '{x=x+$1/1048576} END {printf "%6.0f\n", x}'`
  90    SAVAILFREE=`df --block-size=1048576 | grep -Fe $BACKUPPART | awk '{printf "%6.0f\n", $4}'`
  91    SAVAILDEL=`du -s --block-size=1048576 $BACKUPPART/$BACKUPDIR/. | awk '{printf "%6.0f\n", $1}'`
  92    SAVAIL=`expr $SAVAILFREE + $SAVAILDEL`
  93
  94    if [ `expr $SAVAIL - $SREQ` -gt "0" ]; then
  95       echo "done."
  96       echo "Available: $SAVAIL MB Required: $SREQ MB."
  97    else
  98       echo "not enough space!"
  99       echo "There is not enough space left in $BACKUPPART for the backup!"
 100       echo "Available: $SAVAIL MB Required: $SREQ MB."
 101       echo -n "Remounting backup partition read-only ... "
 102       if ( mount $BACKUPPART -o remount,ro &> /dev/null ) then
 103          echo "done."
 104       elif ( mount $BACKUPPART -o ro &> /dev/null ) then
 105          echo "done."
 106       else
 107          echo "failure!"
 108          echo "There were problems remounting $BACKUPPART in read-only mode!"
 109          echo "Aborting ${BACKUP} System Dump Backup."
 110          echo "Aborted."
 111          echo "-------------------------------------------------------------------------------"
 112          exit 1
 113       fi
 114       echo "Aborting ${BACKUP} System Dump Backup."
 115       echo "Aborted."
 116       echo "-------------------------------------------------------------------------------"
 117       exit 1
 118    fi
 119
 120    echo -n "Deleting old files ... "
 121    if [ `ls -la $BACKUPPART/$BACKUPDIR/ | wc -l` -gt "3" ]; then
 122       rm -f $BACKUPPART/$BACKUPDIR/* &> /dev/null
 123       echo "done."
 124    else
 125       echo "no old files to delete."
 126    fi
 127
 128    echo "Dumping filesystems ... "
 129    for FS in $FSTODUMP
 130    do
 131       if [ "$FS" = "/" ]; then
 132          FSNAME="root"
 133       else
 134          FSNAME=`echo $FS | tr / _ | cut -b 2-`
 135       fi
 136       sync
 137       TODAY="`date +%a%Y%m%d`"
 138       echo -n "Starting dump of $FSNAME ( $FS ) ... "
 139       if ( dump -$DLEVEL $UPDATEDDATE -z -M -s 27306 -f $BACKUPPART/$BACKUPDIR/$FSNAME.$BTYPE. -Q $BACKUPPART/$BACKUPDIR/$FSNAME.$BTYPE.qfa -L ${TODAY}file $FS &> $BACKUPPART/$BACKUPDIR/$FSNAME.log ) then
 140          echo "done."
 141       else
 142          echo "problems!"
 143          echo "There were problems with the dump of $FSNAME ( $FS )."
 144          echo "Check log file at $BACKUPPART/$BACKUPDIR/$FSNAME.log.gz"
 145          echo "Also check log archive file $DUMPLOGARCH."
 146       fi
 147
 148       echo -n "Verifying dump of $FSNAME ( $FS ) ... "
 149       echo "-------------------------------------------------------------------------------" >> $BACKUPPART/$BACKUPDIR/$FSNAME.log
 150       echo "Result of dump for $FSNAME ( $FS ):" >> $BACKUPPART/$BACKUPDIR/$FSNAME.log
 151       if ( restore -C -M -f $BACKUPPART/$BACKUPDIR/$FSNAME.$BTYPE. >> $BACKUPPART/$BACKUPDIR/$FSNAME.log 2>&1 ) then
 152          echo "done."
 153       else
 154          echo "problems!"
 155          echo "There were problems verifying the dump of $FSNAME ( $FS )."
 156          echo "Check log file $BACKUPPART/$BACKUPDIR/$FSNAME.log.gz for more info"
 157       fi
 158       cat $BACKUPPART/$BACKUPDIR/$FSNAME.log |gzip >> $DUMPLOGARCH
 159       echo "-------------------------------------------------------------------------------" |gzip >> $DUMPLOGARCH
 160    done
 161
 162    echo -n "Setting ownership and permissions of dump files ... "
 163    chmod $DUMPFILESMODE $BACKUPPART/$BACKUPDIR/* $DUMPLOGARCH &> /dev/null
 164    chown $DUMPFILESOWN $BACKUPPART/$BACKUPDIR/* $DUMPLOGARCH &> /dev/null
 165    echo "done."
 166
 167    echo -n "Compressing dump log files ... "
 168    gzip $BACKUPPART/$BACKUPDIR/*.log &> /dev/null
 169    echo "done."
 170    sync
 171
 172 else
 173    echo "problems!"
 174    echo "There are problems with the directory structure."
 175    echo "Check directory: $BACKUPPART/$BACKUPDIR"
 176    echo -n "Remounting backup partition read-only ... "
 177    if ( mount $BACKUPPART -o remount,ro &> /dev/null ) then
 178       echo "done."
 179    else
 180       echo "failure!"
 181       echo "There were problems remounting $BACKUPPART in read-only mode!"
 182       echo "Aborting ${BACKUP} System Dump Backup."
 183       echo "Aborted."
 184       echo "-------------------------------------------------------------------------------"
 185       exit 1
 186    fi
 187    echo "Aborting ${BACKUP} System Dump Backup."
 188    echo "Aborted."
 189    echo "-------------------------------------------------------------------------------"
 190    exit 1
 191 fi
 192
 193 echo -n "Remounting backup partition read-only ... "
 194 if ( mount $BACKUPPART -o remount,ro &> /dev/null ) then
 195    echo "done."
 196 else
 197    echo "failure!"
 198    echo "There were problems remounting $BACKUPPART in read-only mode!"
 199    echo "Aborting ${BACKUP} System Dump Backup."
 200    echo "Aborted."
 201    echo "-------------------------------------------------------------------------------"
 202    exit 1
 203 fi
 204
 205 echo "### End of ${BACKUP} System Dump Backup ###"
 206 echo "Done."
 207 echo "-------------------------------------------------------------------------------"
 208
 209 ## end of script