Traefik has no built-in log rotation and no SIGUSR1/reopen handling. --accesslog.filePath and --log.filePath (traefik.yaml) write directly to /volume1/docker/traefik/logs, which had grown to 15.5GB unrotated, contributing to disk pressure (docker-2 CephFS at 82%) and adding write latency to every request through Traefik.