Traefik automatically add sub-domains?

Wappler General How To
#1

I’m using Traefik as a reverse proxy. I now want to add sub-domains automatically without having to manually edit my .yml files and docker-compose it up.

Can I change this file automatically:
static yml config file for traefik to make sub-domains:

http:
  routers:
    example:
      service: example
      rule: "Host(`sub1.example.com`)"
      tls:
        certResolver: leresolver
  services:
    example:
      loadBalancer:
        servers:
          - url: "http://example.com:34102/"

To something like this?

    http:
      routers:
    example:
      service: example
      rule: "Host(`sub1.example.com`)"
      tls:
        certResolver: leresolver
    newCustomer:
      service: newCustomer
      rule: "Host(`newcustomer.example.com`)"
      tls:
        certResolver: leresolver
      services:
    example:
      loadBalancer:
        servers:
          - url: "http://example.com:34102/"
    newCustomer:
      loadBalancer:
        servers:
          - url: "http://example.com:34102/"

Is there a way to do this? Perhaps I can make a API or Webhook request for this where it will send a subdomain name for my client to my server (with ssh or tls?) and edit my yml file and restart my traefik docker container?

#2

You can use regex to match subdomains.

Search for:

HostRegexp

#3

Traefik supports wildcard domains, so I don’t think you’ll need to be rewriting your yml file for each domain, as long as your DNS host is one of the supported platforms. A wildcard domain validation is only supported using the dns method.

A list of the supported providers is here:
https://doc.traefik.io/traefik/https/acme/#dnschallenge

Just remember that after you manually edit the yml, Wappler will overwrite it if you save new target settings.

#4

I’ve been investigating for the last hour about traefik, ssl, cnames and all the stuff you need to create a white label custom domain solution.

This article seems like a good start.

Once you assign a subdomain to a client you can instruct them to add a CNAME to your subdomain.