docker-compose.yml

version: "3.9"
services:
  database:
    image: postgres:12.16
    volumes:
      - ./persistent/data:/var/lib/postgresql/data
    environment:
      - POSTGRES_PASSWORD=SumPassw0rdHere
      - POSTGRES_DB=db
    restart: unless-stopped

  backup:
    image: martlark/pg_dump:12.16
    container_name: postgres-backup
    environment:
      - PGPASSWORD=SumPassw0rdHere
      - PGDB=db # The name of the database to dump
      - PGHOST=database # The hostname of the PostgreSQL database to dump
      - CRON_SCHEDULE=0 3 * * * # Every day at 3am
      - RETAIN_COUNT=1 # Keep this number of backups
    volumes:
      - ./persistent/data:/dump

  database-15-2:
    image: postgres:15.2
    volumes:
      - ./persistent/data-15-2:/var/lib/postgresql/data
    environment:
      - POSTGRES_PASSWORD=SumPassw0rdHere
      - POSTGRES_DB=db
    restart: unless-stopped

  backup-15-2:
    image: martlark/pg_dump:15.2
    depends_on:
      - database-15-2
    environment:
      - PGPASSWORD=SumPassw0rdHere
      - PGDB=db # The name of the database to dump
      - PGHOST=database-15-2 # The hostname of the PostgreSQL database to dump
      - CRON_SCHEDULE=0 3 * * * # Every day at 3am
      - RETAIN_COUNT=1 # Keep this number of backups
    volumes:
      - ./persistent/data-15-2:/dump