selfprivacy-rest-api/selfprivacy_api/backup/tasks.py

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"""
The tasks module contains the worker tasks that are used to back up and restore
"""
from datetime import datetime, timezone
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from selfprivacy_api.graphql.common_types.backup import (
RestoreStrategy,
BackupReason,
)
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from selfprivacy_api.models.backup.snapshot import Snapshot
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from selfprivacy_api.utils.huey import huey
from huey import crontab
from selfprivacy_api.services import get_service_by_id
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from selfprivacy_api.backup import Backups
from selfprivacy_api.backup.jobs import add_autobackup_job
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from selfprivacy_api.jobs import Jobs, JobStatus, Job
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SNAPSHOT_CACHE_TTL_HOURS = 6
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def validate_datetime(dt: datetime) -> bool:
"""
Validates that it is time to back up.
Also ensures that the timezone-aware time is used.
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"""
if dt.tzinfo is None:
return Backups.is_time_to_backup(dt.replace(tzinfo=timezone.utc))
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return Backups.is_time_to_backup(dt)
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# huey tasks need to return something
@huey.task()
def start_backup(service_id: str, reason: BackupReason = BackupReason.EXPLICIT) -> bool:
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"""
The worker task that starts the backup process.
"""
service = get_service_by_id(service_id)
if service is None:
raise ValueError(f"No such service: {service_id}")
Backups.back_up(service, reason)
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return True
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@huey.task()
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def prune_autobackup_snapshots(job: Job) -> bool:
"""
Remove all autobackup snapshots that do not fit into quotas set
"""
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Jobs.update(job, JobStatus.RUNNING)
try:
Backups.prune_all_autosnaps()
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except Exception as e:
Jobs.update(job, JobStatus.ERROR, error=type(e).__name__ + ":" + str(e))
return False
Jobs.update(job, JobStatus.FINISHED)
return True
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@huey.task()
def restore_snapshot(
snapshot: Snapshot,
strategy: RestoreStrategy = RestoreStrategy.DOWNLOAD_VERIFY_OVERWRITE,
) -> bool:
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"""
The worker task that starts the restore process.
"""
Backups.restore_snapshot(snapshot, strategy)
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return True
def do_autobackup() -> None:
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"""
Body of autobackup task, broken out to test it
For some reason, we cannot launch periodic huey tasks
inside tests
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"""
time = datetime.utcnow().replace(tzinfo=timezone.utc)
services_to_back_up = Backups.services_to_back_up(time)
job = add_autobackup_job(services_to_back_up)
progress_per_service = 100 // len(services_to_back_up)
progress = 0
Jobs.update(job, JobStatus.RUNNING, progress=progress)
for service in services_to_back_up:
try:
Backups.back_up(service, BackupReason.AUTO)
except Exception as error:
Jobs.update(
job,
status=JobStatus.ERROR,
error=type(error).__name__ + ": " + str(error),
)
return
progress = progress + progress_per_service
Jobs.update(job, JobStatus.RUNNING, progress=progress)
Jobs.update(job, JobStatus.FINISHED)
@huey.periodic_task(validate_datetime=validate_datetime)
def automatic_backup() -> None:
"""
The worker periodic task that starts the automatic backup process.
"""
do_autobackup()
@huey.periodic_task(crontab(hour="*/" + str(SNAPSHOT_CACHE_TTL_HOURS)))
def reload_snapshot_cache():
Backups.force_snapshot_cache_reload()