traefik: Traefik Timeout while creating Let's Encrypt client

Hello there,

While creating a Traefik LB in a Kubernetes cluster, I got this error :

time="2016-10-19T14:49:50Z" level=info msg="Preparing server http &{Network: Address::80 TLS:<nil> Redirect:<nil> Auth:<nil> Compress:false}"
time="2016-10-19T14:49:50Z" level=info msg="Preparing server https &{Network: Address::443 TLS:0xc4201b57a0 Redirect:<nil> Auth:<nil> Compress:false}"
time="2016-10-19T14:49:50Z" level=info msg="Starting server on :80"
time="2016-10-19T14:49:52Z" level=info msg="Generating ACME Account..."
time="2016-10-19T14:50:03Z" level=info msg=buildACMEClient...
time="2016-10-19T14:50:03Z" level=debug msg="Building ACME client..."
time="2016-10-19T14:50:13Z" level=error msg="Error creating TLS config get directory at 'https://acme-staging.api.letsencrypt.org/directory': failed to get \"https://acme-staging.api.letsencrypt.org/directory\": Get https://acme-staging.api.letsencrypt.org/directory: net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)"
time="2016-10-19T14:50:13Z" level=fatal msg="Error preparing server: get directory at 'https://acme-staging.api.letsencrypt.org/directory': failed to get \"https://acme-staging.api.letsencrypt.org/directory\": Get https://acme-staging.api.letsencrypt.org/directory: net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)"

and my conf file (more or less the default one) :

    # traefik.toml
    graceTimeOut = 60
    defaultEntryPoints = ["http","https"]
    [entryPoints]
      [entryPoints.http]
      address = ":80"
      [entryPoints.https]
      address = ":443"
    [acme]
    email = "tom@blaaast.co"
    storage = "/acme/acme.json"
    entryPoint = "https"
    onDemand = true
    onHostRule = true
    caServer = "https://acme-staging.api.letsencrypt.org/directory"
    [[acme.domains]]
    main = "domain.com"
    sans = ["sub.domain.com"]

Has anybody hit this problem ? Is it Kubernetes related ? Or do I have to setup a timeout duration somewhere ?

Thanks 😃