ERROR (Kamal::ConfigurationError): unknown key: traefik

[ghillahill]

As the title says we are getting this error without making any changes to the code except for the gem update to 1.9.2

Thing is that in the Gemfile

kamal version command return: 2.3.0 is it normal?

We are unable to deploy and we don't want to switch to Kamal 2 for now.

Also kamal downgrade is not usable even if we are using Kamal 1.9.2, returning ERROR (Kamal::ConfigurationError): unknown key: traefik too

Do we need to apply kamal 2 changes to the Kamal 1.9.x too?

Gemfile

group :development do
  gem 'kamal', '~> 1.9.0'
end

Deploy.yml snippet

traefik:
  options:
    publish:
      - 443:443
      - 8080:8080
    volume:
      - "./acme_certs:/acme_certs"
  args:
    api.dashboard: true
    api.insecure: true
    providers.http.endpoint: http://xxxxxxxx/traefik/config
    providers.http.pollInterval: "5s"
    entryPoints.web.address: ":80"
    entryPoints.websecure.address: ":443"
    certificatesResolvers.letsencrypt.acme.email: "xxxxxxx"
    certificatesResolvers.letsencrypt.acme.storage: "/acme_certs/acme.json"
    certificatesResolvers.letsencrypt.acme.caServer: "https://acme-v02.api.letsencrypt.org/directory"
    certificatesResolvers.letsencrypt.acme.httpchallenge: true
    certificatesResolvers.letsencrypt.acme.httpchallenge.entrypoint: web

[igor-alexandrov]

@ghillahill you should either use a binstub ./bin/kamal or bundle exec bundle exec kamal.

kamal version returns 2.3.0 because you didn't specify what exact installation of the Kamal you are launching.

[garlou]

I'm having the same problem with kamal 2.3.0

[igor-alexandrov]

Kamal 2.x replaced Traefik with kamal-proxy and so the traefik key in the config file is not valid anymore.