Traefik web host on Docker Swarm

A simple Traefik web hosting architecture orchestrated by Docker Swarm. Designed for quick and easy hosting and routing of multiple self-contained Docker images. This architecture offers a straightforward approach to link URLs to containerized applications. All incoming HTTP traffic is rerouted to a secure and encrypted HTTPS connection certified by Let's encrypt.

Requirements

• Linux web server - DigitalOcean droplet or similar.
• IPv4 - IP address to the web server.
• Docker - Up to date version of Docker running on server.
• Docker image - Dockerised web application hosted on Docker Hub.
• Domain name - URL routed to the web server.

Setup

1. Create the required directories for storing TSL certificates and logs (can be relocated in traefik/docker-compose.yml).

mkdir logs && mkdir letsencrypt

2. Set the email and IP environment variables to your information.

export WEBHOST_EMAIL=email@example.com      # Your email address
export WEBHOST_IP=192.168.0.1               # IP to server

3. Initiate the Docker Swarm cluster.

docker swarm init --advertise-addr ${WEBHOST_IP}

4. Deploy the Traefik container.

docker stack deploy -c traefik/docker-compose.yml webhost

5. Set the website environmental variables and deploy website container.

export WEBSITE_SERVICE=website1           # Any unique tag 
export WEBSITE_IMAGE=nginx                # Image name on Docker Hub
export WEBSITE_URL=myurl.com              # Without www

docker stack deploy -c website/docker-compose.yml ${WEBSITE_SERVICE}

6. Repeat step 5 for every website to be deployed.
7. When ready to deploy, change the Let's Encrypt URL in traefik/docker-compose.yml to deployment mode, and redeploy webhost container.

FROM:   https://acme-staging-v02.api.letsencrypt.org/directory
TO:     https://acme-v02.api.letsencrypt.org/directory

docker stack deploy -c traefik/docker-compose.yml webhost