===== Créer le fichier /etc/udev/rules.d/10-custom-usb-disk-detect.rules =====

  vi /etc/udev/rules.d/10-custom-usb-disk-detect.rules

Contenu :

<code>

ACTION=="add", KERNEL=="sd?1", SUBSYSTEM=="block", RUN+="/usr/bin/systemctl --no-block start usb_backup@%k.service"

</code>



===== Créer le fichier /opt/usb_backup.sh =====

  vi /opt/usb_backup.sh

Contenu :

<code bash>

#!/bin/bash
# apt install beep udisks2
 
 
LOG_FILE=$0.log
# CHANGEME ::::
PARTITION_LABEL="backuplgc"
MOUNT_POINT="/mnt/usb_backup_backuplgc"
RSYNC_PATHS[0]="/mnt/pve/hdd_8to/dump/"
RSYNC_PATHS[1]="/etc/"
RSYNC_PATHS[2]="/opt/"
RSYNC_PATHS[3]="/root/"
 
 
horoDate()
{
  echo $(date "+%Y%m%d-%H%M%S")
}
 
 
function uptime_int()
{
  if [ -e /proc/uptime ] ; then
    echo `cat /proc/uptime | awk '{printf "%0.f", $1}'`
  else
    set +e
    sysctl kern.boottime &> /dev/null
    if [ $? -eq 0 ] ; then
      local kern_boottime=`sysctl kern.boottime 2> /dev/null | sed "s/.* sec\ =\ //" | sed "s/,.*//"`
      local time_now=`date +%s`
      local uptime=$(($time_now - $kern_boottime))
      echo $uptime
    else
      echo "-1"
    fi
    set -e
  fi
}
 
  
errorBeep()
{
  beep  -f 220  -l 800 -d 200 -r 4
}
 
 
tooSoonBeep()
{
  beep  -f 1600  -l 100 -d 20 -r 4
}
 
 
victoryBeep()
{
  beep  -f 130  -l 100 \
     -n -f 262  -l 100 \
     -n -f 330  -l 100 \
     -n -f 392  -l 100 \
     -n -f 523  -l 100 \
     -n -f 660  -l 100 \
     -n -f 784  -l 300 \
     -n -f 660  -l 300 \
     -n -f 146  -l 100 \
     -n -f 262  -l 100 \
     -n -f 311  -l 100 \
     -n -f 415  -l 100 \
     -n -f 523  -l 100 \
     -n -f 622  -l 100 \
     -n -f 831  -l 300 \
     -n -f 622  -l 300 \
     -n -f 155  -l 100 \
     -n -f 294  -l 100 \
     -n -f 349  -l 100 \
     -n -f 466  -l 100 \
     -n -f 588  -l 100 \
     -n -f 699  -l 100 \
     -n -f 933  -l 300 \
     -n -f 933  -l 100 \
     -n -f 933  -l 100 \
     -n -f 933  -l 100 \
     -n -f 1047 -l 1000
 }
 

 echo "===============================================================================" >> $LOG_FILE
echo "$(horoDate) New usb device detected: $1." >> $LOG_FILE
 
if [ $(uptime_int) -lt 120 ]; then
  echo "$(horoDate) Uptime too low, not running script." >> $LOG_FILE
  tooSoonBeep
  exit 1 
fi
 
 
if [ -e /dev/disk/by-label/$PARTITION_LABEL ]; then
  echo "$(horoDate) Partition label \"$PARTITION_LABEL\" found." >> $LOG_FILE
  mount /dev/disk/by-label/$PARTITION_LABEL $MOUNT_POINT >> $LOG_FILE 2>&1
  if [ $? -eq 0 ]; then
    echo "$(horoDate) Partition /dev/disk/by-label/$PARTITION_LABEL mounted on $MOUNT_POINT." >> $LOG_FILE
    for RSYNC_PATH in ${RSYNC_PATHS[*]}; do
      echo "$(horoDate) Rsync "$RSYNC_PATH" to $MOUNT_POINT/$(basename $RSYNC_PATH)">> $LOG_FILE
      rsync -aAX --delete --delete-before "$RSYNC_PATH" $MOUNT_POINT/$(basename $RSYNC_PATH) >> $LOG_FILE 2>&1 
    done
    echo "$(horoDate) Backup ended, unmounting partition, shutting off disk and signal end of script." >> $LOG_FILE
    sync
    sync
    umount $MOUNT_POINT >> $LOG_FILE 2>&1
    sync
    sync
    echo "$(horoDate) unmounting done" >> $LOG_FILE
    echo -e "Script de backup termine correctement :\n\n\n$(tail -n 10 $(echo $LOG_FILE))" | mail -s "[$(hostname -f)] USB backup script : OK" root
    victoryBeep
    udisksctl power-off --block-device $(readlink -f "/dev/disk/by-label/backuplgc" | sed -e 's/[- 0-9]*$//') >> $LOG_FILE 2>&1
    exit 0
  else
    echo "$(horoDate) Cannot mount /dev/disk/by-label/$PARTITION_LABEL on $MOUNT_POINT, end of script." >> $LOG_FILE
    echo -e "Script de backup termine AVEC PROBLEMES :\n\n\n$(tail -n 10 $(echo $LOG_FILE))" | mail -s "[$(hostname -f)] /!\\ USB backup script : KO /!\\" root
    errorBeep
    exit 2
  fi 
else
  echo "$(horoDate) Partition label \"$PARTITION_LABEL\" no found, end of script." >> $LOG_FILE
  echo -e "Script de backup termine AVEC PROBLEMES :\n\n\n$(tail -n 10 $(echo $LOG_FILE))" | mail -s "[$(hostname -f)] /!\\ USB backup script : KO /!\\" root
  errorBeep
  exit 3


</code>

  chmod 750 /opt/usb_backup.sh


===== Ajouter le service systemd =====

    systemctl edit --full --force usb_backup\@.service

Mettre :

<code>

[Unit]
Description=Backup to USB Flash Disk
BindsTo=dev-%i.device

[Service]
Type=simple
ExecStart=/opt/usb_backup.sh %I

</code>

Puis lancer :

<code>
systemctl daemon-reload
udevadm control --reload-rules && udevadm trigger
systemctl restart systemd-udevd
</code>


Pour créer un disque de backup :
  * faire une table de partition GPT
  * créer 1 partition de type Linux, avec le label correspondant à $PARTITION_LABEL
  * formater la partition
  * tester