Cannot get v2 working as reverse proxy with docker & LE "no args for matcher Host"

Traefik Traefik v2
1

I am trying to migrate from v1.7 to v2.4 using docker containers and Lets Encrypt certs.

Here are my config files:
traefik.toml

[entryPoints]
  [entryPoints.web]
    address = ":80"
    [entryPoints.web.http.redirections.entryPoint]
      to = "websecure"
      scheme = "https"

  [entryPoints.websecure]
    address = ":443"

[api]
  dashboard = true

[certificatesResolvers.lets-encrypt.acme]
  email = "a@a.com"
  storage = "acme.json"
  [certificatesResolvers.lets-encrypt.acme.tlsChallenge]

[providers.docker]
  watch = true
  network = "web"

[providers.file]
  filename = "traefik_dynamic.toml"

traefik_dynamic.toml

[http.middlewares.simpleAuth.basicAuth]
  users = [
    "admin:pwhash"
  ]

[http.routers.api]
  rule = "Host(`sub.domain.com`)"
  entrypoints = ["websecure"]
  middlewares = ["simpleAuth"]
  service = "api@internal"
  [http.routers.api.tls]
    certResolver = "lets-encrypt"

Docker run:

docker run -d \
        --name test \
        --restart unless-stopped \
        --network traefik_entrypoint \
        -l traefik.http.routers.internal.rule=Host\(`sub.domain.com`\) \
        -l traefik.http.routers.internal.tls=true \
        -l traefik.http.routers.internal.tls.certresolver=lets-encrypt \
        -l traefik.port=80 \
        nginx

I get this error in the docker logs and on the dashboard:

level=error msg="no args for matcher Host" entryPointName=websecure routerName=internal@docker

What am I doing wrong?

2

Your backticks are not escaped with your docker run ... command so command substitution is occurring and resulting in an empty string.

Inspect your container and you will see:

            "Labels": {
                "traefik.http.routers.internal.rule": "Host()"
                 ...
                 ...
                 ...
            }
1 Like
3

Thank you!!!
Silly mistake, I assumed it was an issue with how I was setting up Traefik, not a bash issue facepalm

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