"""Cleanup recordings that are expired based on retention config.""" import datetime import itertools import logging import subprocess as sp import threading from pathlib import Path from peewee import DoesNotExist from multiprocessing.synchronize import Event as MpEvent from frigate.config import RetainModeEnum, FrigateConfig from frigate.const import RECORD_DIR, SECONDS_IN_DAY from frigate.models import Event, Recordings from frigate.record.util import remove_empty_directories logger = logging.getLogger(__name__) class RecordingCleanup(threading.Thread): """Cleanup existing recordings based on retention config.""" def __init__(self, config: FrigateConfig, stop_event: MpEvent) -> None: threading.Thread.__init__(self) self.name = "recording_cleanup" self.config = config self.stop_event = stop_event def clean_tmp_clips(self) -> None: # delete any clips more than 5 minutes old for p in Path("/tmp/cache").rglob("clip_*.mp4"): logger.debug(f"Checking tmp clip {p}.") if p.stat().st_mtime < (datetime.datetime.now().timestamp() - 60 * 1): logger.debug("Deleting tmp clip.") # empty contents of file before unlinking https://github.com/blakeblackshear/frigate/issues/4769 with open(p, "w"): pass p.unlink(missing_ok=True) def expire_recordings(self) -> None: logger.debug("Start expire recordings (new).") logger.debug("Start deleted cameras.") # Handle deleted cameras expire_days = self.config.record.retain.days expire_before = ( datetime.datetime.now() - datetime.timedelta(days=expire_days) ).timestamp() no_camera_recordings: Recordings = Recordings.select().where( Recordings.camera.not_in(list(self.config.cameras.keys())), Recordings.end_time < expire_before, ) deleted_recordings = set() for recording in no_camera_recordings: Path(recording.path).unlink(missing_ok=True) deleted_recordings.add(recording.id) logger.debug(f"Expiring {len(deleted_recordings)} recordings") Recordings.delete().where(Recordings.id << deleted_recordings).execute() logger.debug("End deleted cameras.") logger.debug("Start all cameras.") for camera, config in self.config.cameras.items(): logger.debug(f"Start camera: {camera}.") # Get the timestamp for cutoff of retained days expire_days = config.record.retain.days expire_date = ( datetime.datetime.now() - datetime.timedelta(days=expire_days) ).timestamp() # Get recordings to check for expiration recordings: Recordings = ( Recordings.select() .where( Recordings.camera == camera, Recordings.end_time < expire_date, ) .order_by(Recordings.start_time) ) # Get all the events to check against events: Event = ( Event.select() .where( Event.camera == camera, # need to ensure segments for all events starting # before the expire date are included Event.start_time < expire_date, Event.has_clip, ) .order_by(Event.start_time) .objects() ) # loop over recordings and see if they overlap with any non-expired events # TODO: expire segments based on segment stats according to config event_start = 0 deleted_recordings = set() for recording in recordings.objects().iterator(): keep = False # Now look for a reason to keep this recording segment for idx in range(event_start, len(events)): event = events[idx] # if the event starts in the future, stop checking events # and let this recording segment expire if event.start_time > recording.end_time: keep = False break # if the event is in progress or ends after the recording starts, keep it # and stop looking at events if event.end_time is None or event.end_time >= recording.start_time: keep = True break # if the event ends before this recording segment starts, skip # this event and check the next event for an overlap. # since the events and recordings are sorted, we can skip events # that end before the previous recording segment started on future segments if event.end_time < recording.start_time: event_start = idx # Delete recordings outside of the retention window or based on the retention mode if ( not keep or ( config.record.events.retain.mode == RetainModeEnum.motion and recording.motion == 0 ) or ( config.record.events.retain.mode == RetainModeEnum.active_objects and recording.objects == 0 ) ): Path(recording.path).unlink(missing_ok=True) deleted_recordings.add(recording.id) logger.debug(f"Expiring {len(deleted_recordings)} recordings") # delete up to 100,000 at a time max_deletes = 100000 deleted_recordings_list = list(deleted_recordings) for i in range(0, len(deleted_recordings_list), max_deletes): Recordings.delete().where( Recordings.id << deleted_recordings_list[i : i + max_deletes] ).execute() logger.debug(f"End camera: {camera}.") logger.debug("End all cameras.") logger.debug("End expire recordings (new).") def expire_files(self) -> None: logger.debug("Start expire files (legacy).") default_expire = ( datetime.datetime.now().timestamp() - SECONDS_IN_DAY * self.config.record.retain.days ) delete_before = {} for name, camera in self.config.cameras.items(): delete_before[name] = ( datetime.datetime.now().timestamp() - SECONDS_IN_DAY * camera.record.retain.days ) # find all the recordings older than the oldest recording in the db try: oldest_recording = Recordings.select().order_by(Recordings.start_time).get() p = Path(oldest_recording.path) oldest_timestamp = p.stat().st_mtime - 1 except DoesNotExist: oldest_timestamp = datetime.datetime.now().timestamp() except FileNotFoundError: logger.warning(f"Unable to find file from recordings database: {p}") Recordings.delete().where(Recordings.id == oldest_recording.id).execute() return logger.debug(f"Oldest recording in the db: {oldest_timestamp}") process = sp.run( ["find", RECORD_DIR, "-type", "f", "!", "-newermt", f"@{oldest_timestamp}"], capture_output=True, text=True, ) files_to_check = process.stdout.splitlines() for f in files_to_check: p = Path(f) try: if p.stat().st_mtime < delete_before.get(p.parent.name, default_expire): p.unlink(missing_ok=True) except FileNotFoundError: logger.warning(f"Attempted to expire missing file: {f}") logger.debug("End expire files (legacy).") def sync_recordings(self) -> None: logger.debug("Start sync recordings.") # get all recordings in the db recordings: Recordings = Recordings.select() # get all recordings files on disk process = sp.run( ["find", RECORD_DIR, "-type", "f"], capture_output=True, text=True, ) files_on_disk = process.stdout.splitlines() recordings_to_delete = [] for recording in recordings.objects().iterator(): if not recording.path in files_on_disk: recordings_to_delete.append(recording.id) logger.debug( f"Deleting {len(recordings_to_delete)} recordings with missing files" ) # delete up to 100,000 at a time max_deletes = 100000 for i in range(0, len(recordings_to_delete), max_deletes): Recordings.delete().where( Recordings.id << recordings_to_delete[i : i + max_deletes] ).execute() logger.debug("End sync recordings.") def run(self) -> None: # on startup sync recordings with disk (disabled due to too much CPU usage) # self.sync_recordings() # Expire tmp clips every minute, recordings and clean directories every hour. for counter in itertools.cycle(range(self.config.record.expire_interval)): if self.stop_event.wait(60): logger.info(f"Exiting recording cleanup...") break self.clean_tmp_clips() if counter == 0: self.expire_recordings() self.expire_files() remove_empty_directories(RECORD_DIR)