X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=backup.sh;h=307a14f23aae338f15b76d4c795aa0823ccdd180;hb=040ea36adf3804e541e9973d88c2168da11e8eae;hp=366978dd0bfebe73a9021eeecb607af8631fc7a1;hpb=6c6378103700ad30a3fcb6cb6279c4d533642b83;p=backup.sh

diff --git a/backup.sh b/backup.sh
index 366978d..307a14f 100755
--- a/backup.sh
+++ b/backup.sh
@@ -68,52 +68,69 @@ echo `date`": Backup run starting" >&2
 umask 027
 
 
-#selve backupen
-# krever at noen variabler er satt
-# krever at vi er i rett katalog
 backup()
 {
 
  echo -n `date` >&2
  printf " $computer: $computer:$filesystem $backuplevel backup\n" >&2
 
- if [ "$backuplevel" = "daglig" ] || [ "$backuplevel" = "incremental" ]
+ SNARFILE="${storagedir}/${computer}/${sfilesystem}/.incremental.snar"
+ incrementalsnar="/root/.backup/${sfilesystem}.snar"
+ if [ "$backuplevel" = "daglig" ]
  then
-  lastd=`cat ../.date`
-  lastcmd="--newer='$lastd'"
+   # If incremental backup, we need to copy the incremental status to $computer.
+   # If it does not exist, whine a bit and then run date-based instead.
+   if [ -s "$SNARFILE" ]; then
+     if ! scp $SNARFILE root@$computer:$incrementalsnar; then
+       echo `date`" $computer: Could not copy .incremental.snar to $computer"
+       die
+     fi
+     lastcmd="--listed-incremental=$incrementalsnar --no-check-device"
+   else
+     echo `date`" $computer: Missing incremental.snar for $filesystem, doing date-based backup instead until next full backup" >&2
+     incrementalsnar=""
+     lastd=`cat ../.date`
+     lastcmd="--newer='$lastd'"
+   fi
  else
-  lastcmd=""
+    lastcmd="--listed-incremental=$incrementalsnar"
  fi
 
  # expand the exclude-path for use with tar
  exf=`ssh root@$computer "ls ~/.backup/exclude"`
 
  # We try to run tar on the remote computer
- #    z gzip it
  #    c create archive
  #    C change to directory first
  #    . where to start taring (see C)
  #    $lastcmd only files newer than this
  #    --one-file-system don't traverse file systems
+ #    --use-compress-program compress it using gzip or pigz
  #    --exclude-from file to get exclusion pattern from
  #    Pipe the stuff over ssh to ourselves, run pee to cat the contents to a
  #    file and build a file list, respectivly.  
  TARFILE=$DATE.tmp
- TARCMD="ssh root@$computer \"nice -n 19 ionice -c3 tar --one-file-system -zcf - -C $filesystem . $lastcmd \
+ TARCMD="ssh root@$computer \"nice -n 19 ionice -c3 tar --one-file-system --use-compress-program $compressor -cf - -C $filesystem . $lastcmd \
 	--exclude-from=$exf\" | pee \"cat > $TARFILE\" \"tar tzvf -\""
  echo `date`" $computer: Running $TARCMD" >&2
  eval $TARCMD > $DATE.idx
 
- if [ -s $TARFILE ]; then
-  # File is >0 in size, we assume it worked.
+ if [ $? -eq 0 ] && [ -s $TARFILE ]; then
+  # File is >0 in size and neither cat or tar tzvf failed; we assume it worked.
+
+  if ! scp root@$computer:$incrementalsnar $SNARFILE.tmp; then
+    echo `date`" $computer: Could not copy .incremental.snar from $computer"
+    die
+  fi
 
   # Move tar file in place
   mv $TARFILE $DATE.tgz
+  mv $SNARFILE.tmp $SNARFILE
 
   # Update timestamp
   echo $DATEs > ../.date && touch -t $DATE ../.date
 
-  # Make a sorted filelist as well
+  # Make a sorted file list as well
   sort -k6 < $DATE.idx > $DATE.sdx
 
   # Fix permissions
@@ -127,8 +144,6 @@ backup()
   # Something wrong happened.
   rm $TARFILE
   echo `date`" $computer: $TARFILE empty. $backuplevel backup of $computer:$filesystem failed and deleted"
-
-  # We don't want to return 0
   die
  fi
 
@@ -152,13 +167,17 @@ backup()
  # Try to SSH to the computer without entering a password.
  if ! `ssh -n -o NumberOfPasswordPrompts=0 root@$computer /bin/true`; then
   echo `date`" $computer: Could not use passwordless SSH."
-
-  # We don't want to return 0
   die
  fi
- 
- filesystems=""
 
+ # Check if pigz is available
+ if ssh -n root@$computer "pigz -V 2>/dev/null"; then
+   compressor=pigz
+ else
+   echo `date`" $computer: pigz missing; falling back to gzip."
+   compressor=gzip
+ fi
+ 
  # Check dump bit in fstab
  filesystems=`ssh -n root@$computer "cat /etc/fstab" \
   | grep -v nfs \
@@ -168,33 +187,33 @@ backup()
 
  # Clean up our dir at this client
  if ! ssh root@$computer "rm -r ~/.backup ; mkdir -m 700 ~/.backup"; then
-  echo `date`" $computer: Could not create backup staging area at $computer:~/.backup - skipping backup of $computer"
+  echo `date`" $computer: Could not create backup staging area at $computer:~/.backup"
   die
  fi
 
  # Try to copy $exclude to $computer
  if ! scp $exclude root@$computer:~/.backup/exclude > /dev/null; then
-  echo `date`" $computer: Could not copy exclude.txt to $computer - skipping backup of $computer"
+  echo `date`" $computer: Could not copy exclude.txt to $computer"
   die
  fi
 
  # Try to copy preeexec and postexec if they exist
  if [ -f $confdir/preexec.$computer ]; then
    if ! scp $confdir/preexec.$computer  root@$computer:~/.backup/preexec >&2; then
-     echo `date`" $computer: Could not copy preexec.$computer to $computer:~/.backup/preexec - skipping backup of $computer"
+     echo `date`" $computer: Could not copy preexec.$computer to $computer:~/.backup/preexec"
      die
    fi
  fi
  if [ -f $confdir/postexec.$computer ]; then
    if ! scp $confdir/postexec.$computer root@$computer:~/.backup/postexec >&2; then
-     echo `date`" $computer: Could not copy postexec.$computer to $computer:~/.backup/postexec - skipping backup of $computer"
+     echo `date`" $computer: Could not copy postexec.$computer to $computer:~/.backup/postexec"
      die
    fi
  fi
 
- # Try to run preexec if it exist
+ # Try to run preexec if it exists
  if ! ssh root@$computer "[ ! -f ~/.backup/preexec ] || /bin/bash -x ~/.backup/preexec" >&2; then
- 	echo `date`" $computer: Could not run $computer:~/.backup/preexec - skipping backup of $computer"
+ 	echo `date`" $computer: Could not run $computer:~/.backup/preexec"
 	die
  fi
 
@@ -207,8 +226,6 @@ backup()
   # Prepare storage area
   mkdir -m 755 -p $storagedir/$computer/$sfilesystem/full 2>/dev/null
   mkdir -m 755 -p $storagedir/$computer/$sfilesystem/daglig 2>/dev/null
-  echo $filesystem > ${storagedir}/${computer}/.${sfilesystem}.name 
-  chmod 644 ${storagedir}/${computer}/.${sfilesystem}.name
 
   # Default backuplevel
   backuplevel=daglig
@@ -220,8 +237,7 @@ backup()
    echo $DATEs > $storagedir/$computer/$sfilesystem/.date
   fi
 
-  # Check if we want a full backup - Debug statement that causes noise in cron mail:
-  # printf " $computer $filesystem: $confdir/fastfullbackupdag.$computer.$sfilesystem\n"
+  # Check if we want a full backup
   if [ -f $confdir/fastfullbackupdag.$computer.$sfilesystem ]; then
     fullbackup_min_for_this_machine=$dagermellomfulleforfast
     if [ "$DAY_OF_MONTH" = "`cat $confdir/fastfullbackupdag.$computer.$sfilesystem`" ]; then