Træfik

This project serves as a template to run Træfik v2.8 in a docker container using docker compose.

The goal is to set up a TLS termination proxy for all Docker containers providing web services on a single host.

Features

• Automatic creation/renewal of Let's Encrypt certificates (HTTP challenge).
• Provision of the following basic Middlewares:
  • RedirectScheme: Redirect from HTTP to HTTPS
  • RateLimit: Limit to a fair amount of requests
    • average: 100 requests per second
    • burst: 50 requests (per second)
  • Headers: HTTP Strict Transport Security with long duration
• Provision of three configurations (modern, intermediate [default], old) for TLS.
  → See Mozilla SSL Configuration Generator for more information.
• Use of an .env file for variable substitution in the Compose file.

About træfik

• Homepage: https://traefik.io/traefik/
• Documentation: https://doc.traefik.io/traefik/

Prerequisites

For the HTTP challenge you will need:

• A publicly accessible host allowing connections on port 80 & 443.
• A DNS record for the domain you want to expose pointing to this host.

Docker

To install docker and docker compose, follow the instructions for your platform:

• Install Docker Engine | Docker Documentation > Supported platforms
  • Includes Docker Compose V2
• Post-installation steps for Linux

Setup

1. Create an external docker network named "webproxy":

   docker network create webproxy

2. Make a copy of all sample. files:

   for file in sample.*; do cp "$file" "${file#sample.}"; done;

3. Update environment variables TF_ACME_EMAIL and TF_CERTRESOLVER_NAME1 in '.env':
   • Replace postmaster@mydomain.com with a valid email address of yours.
   • Replace mydomain-com with a suitable name to identify this certificate resolvers configuration.
     → Dots (.) in the name are not allowed!
4. Start the container in detached mode:

   docker compose up -d

docker compose commands must be run in the root directory of the project, i.e. where 'docker-compose.yml' is located!

Test

1. Uncomment lines 43 to 55 in 'docker-compose.yml' to enable service "whoami" and configure as follows:
   • Replace whoami.mydomain.com with the intended domain from Prerequisites.
   • Replace mydomain-com with the value set for TF_CERTRESOLVER_NAME1 in '.env'.
2. Start the container in detached mode:

   docker compose up -d

3. Wait a bit and visit http://whoami.mydomain.com to confirm everything went fine.

Debugging

Use docker logs to see the output of the container:

docker logs webproxy-traefik-1