file backup script

filebackup.sh

#!/usr/bin/env bash

# Simple file backup script
# This can be easily put into a cron job to automatically maintain a rolling 7 day backup of specified
# paths tarred and gzipped accessible to the user running the script.
# 
# Usage:
# filebackup.sh <backup_name> <directory_to_backup> <backup_storage_directory>
#
# Reference: https://github.com/classyllama/ansible-role-filebackup/blob/master/templates/filebackup.sh.j2

set -e

# Set variables
BACKUP_NAME=""
DIRECTORY_TO_BACKUP=""
BACKUP_STORAGE_DIRECTORY=""
FILE_TO_BACKUP=""
[ -n "$1" ] && BACKUP_NAME=$1
[ -n "$2" ] && DIRECTORY_TO_BACKUP=$2
[ -n "$3" ] && BACKUP_STORAGE_DIRECTORY=$3
[ -n "$4" ] && FILE_TO_BACKUP=$4

TIMESTAMP=$(date --utc +%Y%m%dT%H%M%SZ) # Get ISO 8601 UTC Timestamp

# Set default file permissions 600
umask 177

# Make sure backup storage directory exists
mkdir -p ${BACKUP_STORAGE_DIRECTORY}

# Create archive file of directory (storing relative paths inside archive)
tar -czf ${BACKUP_STORAGE_DIRECTORY}/${BACKUP_NAME}_${TIMESTAMP}.tar.gz -C ${DIRECTORY_TO_BACKUP} ./${FILE_TO_BACKUP}

# Delete files older than 7 days
find ${BACKUP_STORAGE_DIRECTORY}/${BACKUP_NAME}_* -mtime +7 -exec rm {} \;