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What is dev.chr-numerique.tech?

This service provide a default resolving to 127.0.0.1, pretty handy in a local configuration:
               backoffice.dev.chr-numerique.tech   resolves to   127.0.0.1
                  manager.dev.chr-numerique.tech   resolves to   127.0.0.1
                   mysite.dev.chr-numerique.tech   resolves to   127.0.0.1
                  foo.bar.dev.chr-numerique.tech   resolves to   127.0.0.1


Ok but why?

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.dev.chr-numerique.tech`)"
  app2:
    image: containous/whoami
    labels:
      - "traefik.http.routers.app2.rule=Host(`app2.dev.chr-numerique.tech`)"

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


Copyright
Pyrou to traefik.me for the inspiration of the present website.