From 688d1f668beb96e930f59dbe30e001ce6f3f6704 Mon Sep 17 00:00:00 2001 From: downtownallday Date: Sat, 17 Sep 2022 18:11:09 -0400 Subject: [PATCH] Add custom backup option to nuke current backup before full backup. When short on disk space and storing backup locally, delete all local backups before a new one is created. Otherwise, enough disk space for a minimum of 2 full backups is needed, which may not be available. --- management/backup.py | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/management/backup.py b/management/backup.py index 62c74268..5a868b60 100755 --- a/management/backup.py +++ b/management/backup.py @@ -242,6 +242,13 @@ def get_target_type(config): protocol = config["target"].split(":")[0] return protocol +def nuke_local_files(backup_dir, backup_cache_dir, config, env): + # the files must be removed manually, duplicity won't do + # it. eg. `duplicity remove-older-than "1s"` will fail with + # "manually purge the repository" + for fn, size in list_target_files(config): + os.unlink(os.path.join(backup_dir,fn)) + def perform_backup(full_backup): env = load_environment() @@ -270,6 +277,15 @@ def perform_backup(full_backup): print(e) sys.exit(1) + # Nuke local files: when short on disk space and storing backups + # locally, delete all local backups before a new one is created. + # Otherwise, enough disk space for a minimum of 2 full backups is + # needed, which may not be available. + if full_backup and "nuke_before_full_backup" in config and config["nuke_before_full_backup"] is True: + if config["target"] != "local" and not config["target"].startswith("file://"): + raise ValueError("custom.yaml option 'nuke_before_full_backup' is only supported for local backups") + nuke_local_files(backup_dir, backup_cache_dir, config, env) + # Stop services. def service_command(service, command, quit=None): # Execute silently, but if there is an error then display the output & exit.