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Just like nip.io or xip.io, traefik.me is a magic domain name that provides wildcard DNS for any IP address. It also provides free wildcard SSL certificate

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What is traefik.me?

Just like nip.io or xip.io, traefik.me is a magic domain name that provides wildcard DNS for any IP address. Say your LAN IP address is 10.0.0.1. Using traefik.me,

                 10.0.0.1.traefik.me   resolves to   10.0.0.1
             www.10.0.0.1.traefik.me   resolves to   10.0.0.1
          mysite.10.0.0.1.traefik.me   resolves to   10.0.0.1
   foo.bar.208.132.27.194.traefik.me   resolves to   208.132.27.194

...and so on. You can use these domains to access virtual hosts on your development web server from devices on your local network, like iPads, iPhones, and other computers. No configuration required!

Alternatively, traefik works with dashes, and provides a default resolving to 127.0.0.1, pretty handy in a local configuration:

                 10-0-0-1.traefik.me   resolves to   10.0.0.1
             www-10-0-0-1.traefik.me   resolves to   10.0.0.1
                   mysite.traefik.me   resolves to   127.0.0.1
                  foo.bar.traefik.me   resolves to   127.0.0.1

How does it work?

traefik.me runs a custom DNS server on the public Internet. When your computer looks up a traefik.me domain, the traefik.me DNS server extracts the IP address from the domain and sends it back in the response.

HTTPS support!

Thanks to Let's encrypt, a wildcard certificate is available for *.traefik.me. Just grab the files on traefik.me. As wildcard certificates are only valid for one level depth subdomains, use the dashed-form subdomain instead of dots. Certificates are regenerated every 60 days.

Ok but why "traefik"?

The name comes from traefik.io, that is an open-source reverse proxy and load balancer. Used in conjonction with docker, it becomes very handy for local web development. Here is a typical docker-compose.yml file you might produce:

version: '3'
services:
  traefik:
    restart: unless-stopped
    image: traefik:v2.0.2
    command: --providers.docker=true
    ports:
      - "80:80"
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
  app1:
    image: containous/whoami
    labels:
      - "traefik.http.routers.app1.rule=Host(`app1.traefik.me`)"
  app2:
    image: containous/whoami
    labels:
      - "traefik.http.routers.app2.rule=Host(`app2.traefik.me`)"

Launch it with docker-compose up. Open your browser, and visit app1.traefik.me or app2.traefik.me. It just works as expected out of the box, without additional configuration or /etc/hosts tuning.

To reach the container from another device on your local network, use the following docker label :

- "traefik.http.routers.app1.rule=HostRegexp(`app1.{ip:.*}.traefik.me`)"

Say your LAN IP address is 10.0.0.1, visiting http://app1.10.0.0.1.traefik.me from any device on your local network will reach your app1 docker container.

Copyright

Kudos to xip.io for the inspiration of the website, nip.io for the dns server.

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Just like nip.io or xip.io, traefik.me is a magic domain name that provides wildcard DNS for any IP address. It also provides free wildcard SSL certificate

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