#!/bin/bash -x
#
# To launch it every day at 4AM, add the following line to /etc/crontab :
# 00 4 * * * root /usr/local/scripts/backupRsync.sh

### PARAMETRES A ADAPTER
LOGIN_USER="nom_utilisateur"
BACKUPSERVER="adresse_serveur"
SSH_PORT="port_ssh"
BACKUP_TO_DIR="repertoire_destination_backup"

DIRECTORIES2BACKUP="liste_des_reperoires_a_sauvegarder_separes_par_des_espaces"
EXCLUDES="liste_des_repertoires_ou_fichiers_a_exclure_separes_par_des_espaces"
NUMBER_OF_ARCHIVES=10
NICE_LEVEL=3
### FIN DES PARAMETRES A ADAPTER

#!/bin/bash
# ----------------------------------------------------------------------
# mikes handy rotating-filesystem-snapshot utility: daily snapshots
# See http://www.mikerubel.org/computers/rsync_snapshots/
# ----------------------------------------------------------------------

# make sure we're running as root
if (( `id -u` != 0 ));
then
  { echo "Sorry, must be root.  Exiting..."; exit; }
fi

# step 1: delete the oldest snapshot:
ssh -p $SSH_PORT -l $LOGIN_USER $BACKUPSERVER rm -rf \
    $BACKUP_TO_DIR/daily.$NUMBER_OF_ARCHIVES

# step 2: shift the middle snapshots(s) back by one, if they exist
for i in `seq $NUMBER_OF_ARCHIVES -1 2`; do
  PREVIOUS=`expr $i - 1`
  ssh -p $SSH_PORT -l $LOGIN_USER $BACKUPSERVER \
    mv $BACKUP_TO_DIR/daily.$PREVIOUS $BACKUP_TO_DIR/daily.$i
done

# step 3: make a hard-link-only (except for dirs) copy of the latest snapshot,
# if that exists

ssh -p $SSH_PORT -l $LOGIN_USER $BACKUPSERVER [ -d $BACKUP_TO_DIR/daily.0 ]
if [ $? -eq 0 ]
then
  echo "Moving DIRECTORY"
  ssh -p $SSH_PORT -l $LOGIN_USER $BACKUPSERVER \
    cp -al $BACKUP_TO_DIR/daily.0 $BACKUP_TO_DIR/daily.1
else
  echo "Creating DIRECTORY"
  ssh -p $SSH_PORT -l $LOGIN_USER $BACKUPSERVER mkdir $BACKUP_TO_DIR/daily.0
fi

# step 4: rsync from the system into the latest snapshot (notice that
# 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
# snapshot(s) too!
for d in $DIRECTORIES2BACKUP
do
  nice --adjust $NICE_LEVEL rsync -va -e "ssh -p $SSH_PORT" --progress \
    --relative --delete --delete-excluded $EXCLUDES $d \
    $LOGIN_USER@$BACKUPSERVER:$BACKUP_TO_DIR/daily.0
done

# step 5: update the mtime of daily.0 to reflect the snapshot time
ssh -p $SSH_PORT -l $LOGIN_USER $BACKUPSERVER touch $BACKUP_TO_DIR/daily.0