Allow multiple dns challenge accounts for the same provider

[razem-io]

Welcome!

• Yes, I've searched similar issues on GitHub and didn't find any.
• Yes, I've searched similar issues on the Traefik community forum and didn't find any.

Discussion

https://community.traefik.io/t/how-to-define-multiple-dns-challange-api-keys-for-the-same-provider/14756

What did you expect to see?

I can not define an API key for each DNS challenge. Instead, I can only provide a "global" API key via env vars.

dns1 and dns2 are different gandi.net accounts.

Current:

command:
  - "--certificatesresolvers.dns1.acme.email=nolooky@privacy.com"
  - "--certificatesresolvers.dns1.acme.storage=/acme/dns1/acme.json"
  - "--certificatesresolvers.dns1.acme.dnschallenge=true"
  - "--certificatesresolvers.dns1.acme.dnschallenge.provider=gandiv5"

  - "--certificatesresolvers.dns2.acme.email=nolooky@privacy.com"
  - "--certificatesresolvers.dns2.acme.storage=/acme/dns2/acme.json"
  - "--certificatesresolvers.dns2.acme.dnschallenge=true"
  - "--certificatesresolvers.dns2.acme.dnschallenge.provider=gandiv5"

environment:
  - GANDIV5_API_KEY={{ dc_traefik_dns1_token }}"

Suggestion:

command:
  - "--certificatesresolvers.dns1.acme.email=nolooky@privacy.com"
  - "--certificatesresolvers.dns1.acme.storage=/acme/dns1/acme.json"
  - "--certificatesresolvers.dns1.acme.dnschallenge=true"
  - "--certificatesresolvers.dns1.acme.dnschallenge.provider=gandiv5"
  - "--certificatesresolvers.dns2.acme.dnschallenge.config.GANDIV5_API_KEY={{ dc_traefik_dns1_token }}"

  - "--certificatesresolvers.dns2.acme.email=nolooky@privacy.com"
  - "--certificatesresolvers.dns2.acme.storage=/acme/dns2/acme.json"
  - "--certificatesresolvers.dns2.acme.dnschallenge=true"
  - "--certificatesresolvers.dns2.acme.dnschallenge.provider=gandiv5"
  - "--certificatesresolvers.dns2.acme.dnschallenge.config.GANDIV5_API_KEY={{ dc_traefik_dns2_token }}"

Would this make sense? I was surprised nobody else had this issue yet. I was not able to find anything related.

[ldez]

duplicate of #5472