import psutil import shutil import os import argparse import subprocess # Validating arguments parser = argparse.ArgumentParser() parser.add_argument('--maximum-backup-size-percent', type=int, dest='maximum_backup_size_percent',required=True, choices=range(0,100), help="The directory from which the data should be encrypted.") parser.add_argument('--backups-folder-path',type=str,dest='backups_folder_path',required=True, help="The folder in which the backups are stored") args = parser.parse_args() def print_used_disc_space(): print("%d %% of disk %s are used" % (psutil.disk_usage(args.backups_folder_path).percent,args.backups_folder_path)) def is_directory_used_by_another_process(directory_path): command= "lsof " + directory_path process = subprocess.Popen([command], stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=True) output, error = process.communicate() # @See https://stackoverflow.com/questions/29841984/non-zero-exit-code-for-lsof if process.wait() > bool(0): return False return True for host_backup_directory_name in os.listdir(args.backups_folder_path): host_backup_directory_path = os.path.join(args.backups_folder_path, host_backup_directory_name) for application_directory in os.listdir(host_backup_directory_path): # The directory which contains all backup versions of the application versions_directory = os.path.join(host_backup_directory_path, application_directory) + "/" versions = os.listdir(versions_directory) versions.sort(reverse=False) print_used_disc_space() for version in versions: version_path=os.path.join(versions_directory, version) print("Checking directory %s ..." % (version_path)) if version == versions[-1]: print("Directory %s contains the last version of the backup. Skipped." % (version_path)) continue if is_directory_used_by_another_process(version_path): print("Directory %s is used by another process. Skipped." % (version_path)) continue old_disc_usage_percent=psutil.disk_usage(args.backups_folder_path).percent if old_disc_usage_percent > args.maximum_backup_size_percent: print("Deleting %s to free space." % (version_path)) shutil.rmtree(version_path) new_disc_usage_percent=psutil.disk_usage(args.backups_folder_path).percent difference_percent=old_disc_usage_percent-new_disc_usage_percent print("{:6.2f} %% of drive freed".format(difference_percent)) continue print_used_disc_space() print("Cleaning up finished.")