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Add custom backup option to nuke current backup before full backup.

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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.
This commit is contained in:
downtownallday 2022-09-17 18:11:09 -04:00
parent 2461e9a36c
commit 688d1f668b
1 changed files with 16 additions and 0 deletions
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16
management/backup.py
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@ -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.