version: '3.1'

# Define the services/containers to be run
services:
  ambassador:
    image: quay.io/datawire/ambassador:0.40.2
    ports:
      - 80:80
    volumes:
      # mount a volume where we can inject configuration files
      - ./config:/ambassador/config
  postgres:
    image: my-postgresql
    ports:
    - '5432:5432'

---
apiVersion: ambassador/v0
kind: Mapping
name: postgres_mapping
rewrite: ""
service: postgres:5432
volumes:
  - ../my-postgres:/docker-entrypoint-initdb.d
environment:
  - POSTGRES_MULTIPLE_DATABASES=db1, db2, db3
  - POSTGRES_USER=<>
  - POSTGRES_PASSWORD=<>