62801d8a93
Due to backups running in append-only mode, we do not have a way to safely automatically prune backups. To reduce the likelyhood we forget about backups and end up with failing jobs, add a cron job to send a email to infra-root if the backup partition goes over 90% usage. At this point a manual prune should be run (I9559bb8aeeef06b95fb9e172a2c5bfb5be5b480e). Change-Id: I250d84c4a9f707e63fef6f70cfdcc1fb7807d3a7