Postgrest Docker example

An example docker-compose setup for configuring a PostgreSQL database and the associated PostgREST endpoint, which is exposed to the internet using cloudflared.

Initialize the containers

You can start up all the services in this project by running docker-compose up:

$ docker-compose up -d

Note: depending on how your Docker installation is set up, you may need to preface the above command (and any other docker-compose examples) with sudo.

Example data

You can generate some example data by running the create-example-data.sql script inside of your running docker container:

$ docker-compose exec postgres psql -U user -d db -f /scripts/create-example-data.sql 

This will create a users table and a single user with the name Kristian.

Making requests

A cloudflared tunnel will be generated when you run docker-compose up, such as https://honolulu-devices-update-drink.trycloudflare.com. You can find the currently active tunnel URL by looking through the docker-compose logs:

$ docker-compose logs cloudflared | grep trycloudflare
cloudflared_1 | INFO[2021-06-14T17:26:05Z] | https://honolulu-devices-update-drink.trycloudflare.com

This tunnel allows access to the PostgREST endpoint. You can make a few example requests to see data correctly returned from PostgreSQL to PostgREST, and then to your terminal:

$ curl https://honolulu-devices-update-drink.trycloudflare.com/users
[{"id":1,"name":"Kristian"}]

$ curl https://honolulu-devices-update-drink.trycloudflare.com/users?id=eq.1
[{"id":1,"name":"Kristian"}]

$ curl https://honolulu-devices-update-drink.trycloudflare.com/users?id=eq.2
[]

You can also create records using the PostgREST API, though you should go through the PostgREST tutorial on user authentication to secure your API:

$ curl https://honolulu-devices-update-drink.trycloudflare.com/users \
  -X POST \
  -H "Content-type: application/json" \
  -d '{"name": "Dog"}'

$ curl https://honolulu-devices-update-drink.trycloudflare.com/users?name=eq.Dog
[{"id":2, "name":"Dog"}]

Tunnel configuration

If you'd like to create a permanent cloudflared tunnel at a custom endpoint, you can configure your tunnel. The provided cloudflared directory will be exposed to the Docker container, so you can add config.yml and any relevant JSON/certificate files to authenticate and configure your tunnel.

Thanks

This repository and the (soon-to-come) tutorial for integrating with this on Cloudflare Workers was inspired by @eidam's great tutorial and sample codebase for running an authenticated and secure PostgreSQL, PostgREST, and cloudflared integration on Google Cloud, available here.