Automated database backup solution using WAL-G.

version: '3'
services:
  backup:
    build: .
    environment:
      WALG_FILE_PREFIX: /backups
      PGHOST: database
      PGPORT: 5432
      PGUSER: postgres
      PGPASSWORD: password
      PGDATABASE: mydb
      CRON_SCHEDULE: "0 * * * *"
    volumes:
      - db-data:/var/lib/postgresql/data:ro
      - backups:/backups

volumes:
  db-data:
    external: true
  backups:

• WALG_FILE_PREFIX: Backup storage location
• PGHOST, PGPORT, PGUSER, PGPASSWORD, PGDATABASE: PostgreSQL connection details
• MYSQL_HOST, MYSQL_USER, MYSQL_PASSWORD, MYSQL_DATABASE: MySQL connection details
• CRON_SCHEDULE: Backup frequency (cron format)

Hourly backups by default, retaining only the latest full backup. Empty directories are automatically cleaned up.