Duplicity backup script

backup_script.sh

#!/bin/bash

EXCLUDED_PATHS=(
/tmp
/proc
/sys
/run
/var/log/journal/
)
####################################################################################
DEVICE_PARTITION="sdb1"
MAPPER_NAME="vgcrypt--backup-root"
LUKS_NAME="luks-backup"
MOUNT_DIR="/mnt/backup/"
BACKUP_PATH=$MOUNT_DIR`hostname | tr '[:upper:]' '[:lower:]'`

EXCLUDED_ARGS=`printf "%s%s" "${EXCLUDED_PATHS[@]/#/' --exclude '}"`

####################################################################################### 
### Creation commands: DO NOT RUN AS A SCRIPT

# fdisk /dev/sdb
# cryptsetup -c aes-xts-plain64 -y --use-random luksFormat /dev/$DEVICE_PARTITION
# pvcreate /dev/mapper/$LUKS_NAME
# vgcreate vgcrypt-backup /dev/mapper/$LUKS_NAME
# lvcreate -l +100%FREE vgcrypt-backup --name root
# cryptsetup luksOpen /dev/$DEVICE_PARTITION $LUKS_NAME
# mkfs.ext4 /dev/mapper/vgcrypt--backup-root 
# mkdir $BACKUP_PATH
# mount /dev/mapper/vgcrypt--backup-root /mnt/backup/

####################################################################################

if [ $(mount | grep $MAPPER_NAME | wc -c) -eq 0 ] ; then
  if [ -e /dev/$DEVICE_PARTITION ] ; then
    cryptsetup luksOpen /dev/$DEVICE_PARTITION $LUKS_NAME
    sleep 2
    mount /dev/mapper/$MAPPER_NAME $MOUNT_DIR	
  else
    echo "can't find /dev/$DEVICE_PARTITION"
    exit 1;	
  fi
fi


if [ $(mount | grep $MAPPER_NAME | wc -c) -ne 0 ]; then	
  ### RUN FIRST TIME TO CREATE A FULL BACKUP
  # duplicity full --progress --no-encryption --exclude-device-files $EXCLUDED_ARGS / file://$BACKUP_PATH	
  
  ### Incremental
  duplicity incremental --progress --no-encryption --exclude-device-files $EXCLUDED_ARGS / file://$BACKUP_PATH	
  
  umount $MOUNT_DIR	
  
  if [ $(mount | grep $MAPPER_NAME | wc -c) -eq 0 ] ; then		
    echo "$MAPPER_NAME has been unmounted"	
  else		
    echo "$MAPPER_NAME IS STILL MOUNTED"			
  fi
fi