computer-playbook/roles/cleanup-backups-service/files/cleanup-backups.py

57 lines
2.7 KiB
Python

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.")