ScriptFanix/remote-backup
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implement multi-backup

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This commit is contained in:
Vincent Riquer 2010-08-31 14:40:39 +02:00
parent 67cc3b7b96
commit b9698550f0
1 changed files with 53 additions and 48 deletions
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53
remote-backup
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@ -60,60 +60,63 @@ then
fi fi
###END: generic tool checker ###END: generic tool checker
source /etc/remote-backup.conf for config in /etc/remote-backup/*/config
do
source /etc/remote-backup/defaults.conf
source "$config"
echo "Debut de backup de ${REMOTE_LOCATION} vers ${SNAPSHOT_RW}/${DEST}/ a $(date)" echo "Debut de backup de ${REMOTE_LOCATION} vers ${SNAPSHOT_RW}/${DEST}/ a $(date)"
# ------------- the script itself -------------------------------------- # ------------- the script itself --------------------------------------
# make sure we're running as root # make sure we're running as root
if [ ! $UID -eq 0 ] if [ ! $UID -eq 0 ]
then then
$ECHO "Sorry, must be root. Exiting..." $ECHO "Sorry, must be root. Exiting..."
exit exit
fi fi
if [[ "$REMOUNT" == "true" ]] if [[ "$REMOUNT" == "true" ]]
then then
# attempt to remount the RW mount point as RW; else abort # attempt to remount the RW mount point as RW; else abort
$MOUNT -o remount,rw $MOUNT_DEVICE $SNAPSHOT_RW ; $MOUNT -o remount,rw $MOUNT_DEVICE $SNAPSHOT_RW ;
if (( $? )) if (( $? ))
then then
$ECHO "snapshot: could not remount $SNAPSHOT_RW readwrite" $ECHO "snapshot: could not remount $SNAPSHOT_RW readwrite"
exit exit
fi fi
fi fi
# rotating snapshots of /home (fixme: this should be more general) # rotating snapshots of /home (fixme: this should be more general)
# step 1: delete the oldest snapshot, if it exists: # step 1: delete the oldest snapshot, if it exists:
if [ -d $SNAPSHOT_RW/$DEST/daily.${MAX_ROTATE} ] if [ -d $SNAPSHOT_RW/$DEST/daily.${MAX_ROTATE} ]
then then
$RM -rf $SNAPSHOT_RW/$DEST/daily.${MAX_ROTATE} $RM -rf $SNAPSHOT_RW/$DEST/daily.${MAX_ROTATE}
fi fi
# step 2: shift the middle snapshots(s) back by one, if they exist # step 2: shift the middle snapshots(s) back by one, if they exist
for backup_number in $(seq $((${MAX_ROTATE}-1)) -1 1) for backup_number in $(seq $((${MAX_ROTATE}-1)) -1 1)
do do
if [ -d $SNAPSHOT_RW/$DEST/daily.${backup_number} ] if [ -d $SNAPSHOT_RW/$DEST/daily.${backup_number} ]
then then
$MV $SNAPSHOT_RW/$DEST/daily.${backup_number} \ $MV $SNAPSHOT_RW/$DEST/daily.${backup_number} \
$SNAPSHOT_RW/$DEST/daily.$((${backup_number}+1)) $SNAPSHOT_RW/$DEST/daily.$((${backup_number}+1))
fi fi
done done
# step 3: make a hard-link-only (except for dirs) copy of the latest snapshot, # step 3: make a hard-link-only (except for dirs) copy of the latest snapshot,
# if that exists # if that exists
if [ -d $SNAPSHOT_RW/$DEST/daily.0 ] if [ -d $SNAPSHOT_RW/$DEST/daily.0 ]
then then
$CP -al $SNAPSHOT_RW/$DEST/daily.0 $SNAPSHOT_RW/$DEST/daily.1 $CP -al $SNAPSHOT_RW/$DEST/daily.0 $SNAPSHOT_RW/$DEST/daily.1
fi fi
# step 4: rsync from the system into the latest snapshot (notice that # step 4: rsync from the system into the latest snapshot (notice that
# rsync behaves like cp --remove-destination by default, so the destination # rsync behaves like cp --remove-destination by default, so the destination
# is unlinked first. If it were not so, this would copy over the other # is unlinked first. If it were not so, this would copy over the other
# snapshot(s) too! # snapshot(s) too!
$RSYNC \ $RSYNC \
-a \ -a \
--delete \ --delete \
--delete-excluded \ --delete-excluded \
@ -123,19 +126,21 @@ $RSYNC \
$SNAPSHOT_RW/$DEST/daily.0 $SNAPSHOT_RW/$DEST/daily.0
# step 5: update the mtime of daily.0 to reflect the snapshot time # step 5: update the mtime of daily.0 to reflect the snapshot time
$TOUCH $SNAPSHOT_RW/$DEST/daily.0 $TOUCH $SNAPSHOT_RW/$DEST/daily.0
# and thats it for home. # and thats it for home.
# now remount the RW snapshot mountpoint as readonly # now remount the RW snapshot mountpoint as readonly
if [[ "$REMOUNT" == "true" ]] if [[ "$REMOUNT" == "true" ]]
then then
$MOUNT -o remount,ro $MOUNT_DEVICE $SNAPSHOT_RW $MOUNT -o remount,ro $MOUNT_DEVICE $SNAPSHOT_RW
if (( $? )) if (( $? ))
then then
$ECHO "snapshot: could not remount $SNAPSHOT_RW readonly" $ECHO "snapshot: could not remount $SNAPSHOT_RW readonly"
exit exit
fi fi
fi fi
echo "Fin de backup de ${REMOTE_LOCATION} vers ${SNAPSHOT_RW}/${DEST}/ a $(date)" echo "Fin de backup de ${REMOTE_LOCATION} vers ${SNAPSHOT_RW}/${DEST}/ a $(date)"
echo '-----------------------------------------------------------------------'
done