# Litestream continuous backup of the MealQuest SQLite database (Feature
# 07). The ``litestream`` compose service mounts the same named volume as
# the app and streams every committed change to the Synology NAS over
# SFTP, so the backup lives outside the Docker host.
#
# Nothing here is secret. The SFTP private key is a dedicated, git-ignored
# keypair (deploy/secrets/litestream_key) mounted read-only by compose at
# /etc/litestream/sftp_key; its public half is in
# joshua@10.60.1.50:~/.ssh/authorized_keys. ``host-key`` pins the NAS's
# ECDSA host key, the algorithm Litestream's SSH client negotiates with
# this NAS.
#
# The Synology SFTP server is chrooted to the shared folders, so the
# directory seen over SSH as /volume1/homes/Joshua/mealquest-backups is
# /homes/Joshua/mealquest-backups over SFTP.

# Take a full snapshot daily and keep a week of snapshots plus the
# incremental changes between them (point-in-time restore window).
snapshot:
  interval: 24h
  retention: 168h

dbs:
  - path: /data/mealquest.db
    replicas:
      - type: sftp
        host: 10.60.1.50
        user: joshua
        path: /homes/Joshua/mealquest-backups
        key-path: /etc/litestream/sftp_key
        host-key: ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBNujay9nYEiXuRQf4wDRDU1gp+CDvpeMdhuhC2XypIihzKGEtB654kwrUGfA2kDWAoSPGlmojeS3OIRtHPkj6GY=