multiple databse yml

gistfile1.txt

version: '3.8'

x-postgres-defaults: &postgres-defaults
  image: postgres:latest
  environment:
    POSTGRES_USER: postgres_user
    POSTGRES_PASSWORD: your_password
    POSTGRES_DB: your_database
  volumes:
    - pgdata:/var/lib/postgresql/data

services:
  postgresql_instance_1:
    <<: *postgres-defaults
    ports:
      - "5432:5432"
    volumes:
      - pgdata1:/var/lib/postgresql/data

  postgresql_instance_2:
    <<: *postgres-defaults
    ports:
      - "5433:5432"
    volumes:
      - pgdata2:/var/lib/postgresql/data

volumes:
  pgdata1:
  pgdata2: