Using Docassemble with Traefik and HTTPS

I push my docker skills to put docassemble behind a reverse proxy, Traefik, complete with HTTPS!

Using Docassemble with Traefik and HTTPS

Things you can only do during a lockdown – install a new server. As I mentioned previously, I got round to installing the latest Ubuntu LTS on my home server. Instead of using apt get for new software, I would run my server services through Docker instead. First up, I got Pi-Hole working and blocking ads. I's been sweet.

Let’s Play with: Pi-Hole
I try to install Pi-Hole Server to block all ads and tracking websites at home.

My conviction to use containers started with docassemble. You can use docassemble to generate contracts from answering questions. It's relevant to my work and I am trying to get more of my (non-legal) colleagues to try it. Unlike other software I have tried, docassemble recommends just using docker. With one command, docker run -d jhpyle/docassemble, I would get a fully-featured server. My mind was blown.

A free, open-source expert system for guided interviews and document assembly, based on Python, YAML, and Markdown.

However, as I became more familiar with how to get docker to do what I want, the limitations of that simple command began to restrict me. Docassemble uses several ports. Many other applications share the same port, especially for a web server: 80 and 443. If docker and docassemble took these ports, no one else was going to get them. I wasn't sure if I wanted my home server to be just a docassemble server.

Furthermore, using secure ports (HTTPS) became a serious problem. I wanted to use my home server's docassemble installation as a development base, so it should be accessible to the outside world. For some reason, docassemble wouldn't accept my wildcard certs. If I planned to use it for anything serious, having an unsecured website was impossible.

It got so frustrating that I gave up.

Enter the Reverse-Proxy: Traefik

The short answer to my problems was to use a reverse proxy. A reverse proxy is a kind of server that gets information from another server for a client. Or in this case, a traefik server receives a request and figures out which docker container it should go to. A traefik server can also do other things, such as providing end to end security for your communications by obtaining free SSL certificates from Let's Encrypt.

Traefik Documentation

I was convinced to go for this because it claimed that it would make "publishing your services a fun and easy experience". When I read that, I let a tear go. Is it actually possible for this program to automatically detect the right configuration for your services? Even for something as big as docassemble?

I'll let you be the judge of that at the end of this article.

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