# 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
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 $DATE.tgz
- if [ "$incrementalsnar" ]; then
- mv $SNARFILE.tmp $SNARFILE
+ if [ "$remotesnar" ]; then
+ mv $localsnar.tmp $localsnar
fi
# Update timestamp
# Check that the target filesystem is mounted (actually check that it's not
# the root filesystem)
if [ ! -d "$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@$computer /bin/true; then
diemsg "Could not use passwordless SSH."
fi
if ssh -n root@$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
# 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
fi
# 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 $prefix*
done
if ! ssh root@$computer "[ ! -f /root/.backup/postexec ] || /bin/bash -x /root/.backup/postexec" >&2; then
diemsg "Could not run $computer:/root/.backup/postexec"
fi
-
-echo `date`": $computer: Backup completed successfully."
-echo `date`": $computer: Backup completed successfully." >&2
+
+# Use warn so that we will get an email even on success.
+warnmsg "Backup completed successfully."
# Remove lockfile
rm $LOCKFILE
projects / backup.sh / blobdiff