X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=backup.sh;h=6352fcebdff1b3a5eef94053292b9f58aea60ddc;hb=2ff8529b9960dc83317f3e64f15ca9fc79878e39;hp=9f92f5c1fee9e18606a28ea60663e8e518227b68;hpb=1fe2cff5aef7de71e7c987f1b92890c57242cf1c;p=backup.sh diff --git a/backup.sh b/backup.sh index 9f92f5c..6352fce 100755 --- a/backup.sh +++ b/backup.sh @@ -44,56 +44,61 @@ fi # Die more or less gracefully (at least notify user) die() { - echo `date`": Something nasty happened." + warnmsg "Aborting." rm $LOCKFILE exit 1 } diemsg() { - echo `date`": $computer: $@" + warnmsg "$@" die } +warnmsg() { + echo `date`": $computer: $@" + echo `date`": $computer: $@" >&2 +} +infomsg() { + echo `date`": $computer: $@" >&2 +} # Trap C-c and kill trap die SIGINT SIGTERM # Don't start if we're already running if [ -e $LOCKFILE ]; then - echo `date`": $LOCKFILE exists for pid `cat $LOCKFILE`, exiting." - echo `date`": $LOCKFILE exists for pid `cat $LOCKFILE`, exiting." >&2 - exit 1 + diemsg "$LOCKFILE exists for pid `cat $LOCKFILE`." fi; touch $LOCKFILE echo $$ > $LOCKFILE -echo `date`": Backup run starting" >&2 +infomsg "Backup run starting" umask 027 - backup() { - echo -n `date` >&2 - printf " $computer: $computer:$filesystem $backuplevel backup\n" >&2 + infomsg "$computer:$filesystem $backuplevel backup" - SNARFILE="${storagedir}/${computer}/${sfilesystem}/.incremental.snar" - incrementalsnar="/root/.backup/${sfilesystem}.snar" - if [ "$backuplevel" = "daglig" ] - then + localsnar="${storagedir}/${computer}/${sfilesystem}/.incremental.snar" + remotesnar="/root/.backup/${sfilesystem}.snar" + if [ "$backuplevel" = "daglig" ]; then # 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:$incrementalsnar; then + if [ -s "$localsnar" ]; then + if ! scp $localsnar root@$computer:$remotesnar; then diemsg "Could not copy .incremental.snar to $computer" fi - lastcmd="--listed-incremental=$incrementalsnar --no-check-device" + lastcmd="--listed-incremental=$remotesnar --no-check-device" else - echo `date`" $computer: Missing incremental.snar for $filesystem, doing date-based backup instead until next full backup" >&2 - incrementalsnar="" + infomsg "Missing incremental.snar for $filesystem, doing date-based backup instead until next full backup" + remotesnar="" lastd=`cat ../.date` lastcmd="--newer='$lastd'" fi else - lastcmd="--listed-incremental=$incrementalsnar" + # Note: Since we rm-ed .backup previously, and we don't scp over + # anything in this branch, this file will not exist, and we + # will be doing a full backup (but we want the output of it). + lastcmd="--listed-incremental=$remotesnar" fi # We try to run tar on the remote computer @@ -109,21 +114,23 @@ backup() TARFILE=$DATE.tmp TARCMD="ssh root@$computer \"nice -n 19 ionice -c3 tar --one-file-system --use-compress-program $compressor -cf - -C $filesystem . $lastcmd \ --exclude-from=/root/.backup/exclude\" | pee \"cat > $TARFILE\" \"tar tzvf -\"" - echo `date`" $computer: Running $TARCMD" >&2 + infomsg "Running $TARCMD" eval $TARCMD > $DATE.idx if [ $? -eq 0 ] && [ -s $TARFILE ]; then # File is >0 in size and neither cat or tar tzvf failed; we assume it worked. - if [ "$incrementalsnar" ]; then - if ! scp root@$computer:$incrementalsnar $SNARFILE.tmp; then + if [ "$remotesnar" ]; then + if ! scp root@$computer:$remotesnar $localsnar.tmp; then diemsg "Could not copy .incremental.snar from $computer" fi fi # Move tar file in place mv $TARFILE $DATE.tgz - mv $SNARFILE.tmp $SNARFILE + if [ "$remotesnar" ]; then + mv $localsnar.tmp $localsnar + fi # Update timestamp echo $DATEs > ../.date && touch -t $DATE ../.date @@ -147,18 +154,18 @@ backup() # Check that the target filesystem is mounted (actually check that it's not # the root filesystem) if [ ! -d "$storagedir/$computer" ]; then - diemsg "Target filesystem ($storagedir/$computer) does not exist. Aborting" + diemsg "Target filesystem ($storagedir/$computer) does not exist." fi rootfilesystem=`df -P /` targetfilesystem=`df -P "$storagedir/$computer"` if [ "$rootfilesystem" == "$targetfilesystem" ]; then - diemsg "Target filesystem ($storagedir/$computer) was mounted on /. Aborting" + diemsg "Target filesystem ($storagedir/$computer) was mounted on /." fi -echo `date`" $computer: Backing up $computer" >&2 +infomsg "Backing up $computer" # Try to SSH to the computer without entering a password. -if ! `ssh -n -o NumberOfPasswordPrompts=0 root@$computer /bin/true`; then +if ! ssh -n -o NumberOfPasswordPrompts=0 root@$computer /bin/true; then diemsg "Could not use passwordless SSH." fi @@ -166,7 +173,7 @@ fi if ssh -n root@$computer "pigz -V 2>/dev/null"; then compressor=pigz else - echo `date`" $computer: pigz missing; falling back to gzip." + infomsg "pigz missing; falling back to gzip." compressor=gzip fi @@ -215,11 +222,9 @@ for filesystem in $filesystems; do # Default backuplevel backuplevel=daglig - if [ ! -s $storagedir/$computer/$sfilesystem/.date ] - then + if [ ! -s $storagedir/$computer/$sfilesystem/.date ]; then # Take the first full backup of this filesystem on this computer backuplevel=full - echo $DATEs > $storagedir/$computer/$sfilesystem/.date fi # Check if we want a full backup @@ -259,7 +264,7 @@ for filesystem in $filesystems; do # Delete old full backups for full in `ls -1t $storagedir/$computer/$sfilesystem/full/*tgz | tail -n +$mf`; do prefix=`echo $full | sed "s/\.[^.]*$//"` - echo `date`": $computer:$filesystem Deleting full backup $prefix" >&2 + infomsg "$computer:$filesystem Deleting full backup $prefix" rm $prefix* done @@ -278,5 +283,8 @@ if ! ssh root@$computer "[ ! -f /root/.backup/postexec ] || /bin/bash -x /root/. diemsg "Could not run $computer:/root/.backup/postexec" fi +# Use warn so that we will get an email even on success. +warnmsg "$computer: Backup completed successfully." + # Remove lockfile rm $LOCKFILE