Backs up the files/folders according to the configuration in config.json. Will send an reporting the success or failure of the rsyncs.

backup.py

#!/usr/bin/python
#
# Backs up the files/folders according to the configuration in config.json. Will
# send an reporting the success or failure of the rsyncs.

import json, os, smtplib, ast, datetime
from email.mime.text import MIMEText

def email_backup_failures(config, failed_backups, failed = True):
  # build message body
  if not failed:
    if config['report_success']:
      email_body = 'Backup completed SUCCESSFULLY'
    else:
      return
  else:
    email_body = 'The following backups FAILED:'
    for failure in failed_backups:
      email_body += '\n  %s' % failure

  # build message object
  msg = MIMEText(email_body)
  msg['Subject'] = 'Backup script REPORT - %s - [%s]' % (
                       datetime.datetime.now(),
                       os.path.realpath(__file__))
  msg['From'] = config['email_from']
  msg['To'] = ", ".join(config['email_to'])

  # send message
  smtp_server = smtplib.SMTP(
                    config['email_smtp_server'],
                    config['email_smtp_port'])
  smtp_server.login(
      str(config['email_smtp_username']),
      str(config['email_smtp_password']))
  smtp_server.sendmail(
      config['email_from'],
      config['email_to'],
      msg.as_string())
  smtp_server.quit()

def get_log_filename(config):
  if config['log_file_path_relative']:
    script_dir = os.path.dirname(os.path.realpath(__file__))
    return os.path.join(script_dir, config['log_file'])
  else:
    return config['log_file']

def print_log_header(config):
  log_file = open(get_log_filename(config), 'a')
  log_file.write('%s [INFO] #### Begin Backup ####\n' % (
      datetime.datetime.now().strftime('%Y/%m/%d %H:%M:%S')))
  log_file.close();

def backup():
  config = json.loads(open('config.json', 'r').read())
  failed_backups = []

  print_log_header(config)

  for source in config['backup_sources']:
    rsync_command = 'rsync -vur --delete --exclude=%s --log-file=%s %s %s' % (
          config['rsync_excludes'],
          get_log_filename(config),
          source,
          config['backup_server_location'])

    # keep track of the failed rsync commands
    if (os.system(rsync_command)):
      failed_backups.append(rsync_command)

  # report by email
  email_backup_failures(
      config,
      failed_backups,
      failed = len(failed_backups) > 0)

if __name__ == '__main__':
  backup()