Let's Encrypt with Traefik

Question

I try to use Let's Encrypt with Traefik, but here are Traefik's log:

Looking for provided certificate to validate [rancher.foo.bar]...
No provided certificate found for domains [rancher.foo.bar], get ACME certificate.
Looking for an existing ACME challenge for rancher.foo.bar...
No certificate found or generated for rancher.foo.bar
http2: server: error reading preface from client 1.2.3.4:60876: remote error: tls: unknown certificate authority

Here is my config:

traefikLogsFile = "/tmp/traefik.log"
logLevel = "DEBUG" # DEBUG, INFO, WARN, ERROR, FATAL, PANIC
[accessLog]
filePath = "/tmp/access.log"


[entryPoints]
  [entryPoints.http]
  address = ":80"
    [entryPoints.https]
    address = ":443"
      [entryPoints.https.tls]

# Enable ACME (Let's Encrypt): automatic SSL.
[acme]
email = "[email protected]"
storage = "/tmp/acme.json"
entryPoint = "https"
onHostRule = true
[acme.httpChallenge]
entryPoint = "http"


[api]
entryPoint = "traefik"
dashboard = true


[docker]
endpoint = "unix:///var/run/docker.sock"
domain = "foo.bar"
watch = true
exposedbydefault = true
usebindportip = true
swarmmode = false

Traefik providers:

{
  "docker": {
    "backends": {
      "backend-rancher": {
        "servers": {
          "server-rancher": {
            "url": "http://172.17.0.3:8080",
            "weight": 0
          }
        },
        "loadBalancer": {
          "method": "wrr"
        }
      }
    },
    "frontends": {
      "frontend-Host-rancher-foo-bar-0": {
        "entryPoints": [
          "http"
        ],
        "backend": "backend-rancher",
        "routes": {
          "route-frontend-Host-rancher-foo-bar-0": {
            "rule": "Host:rancher.foo.bar"
          }
        },
        "passHostHeader": true,
        "priority": 0,
        "basicAuth": []
      }
    }
  }
}

What's wrong?
Thanks

In fact, we need more logs to understand your problem. What the logs say here, is that your certificate had never been generated. You enabled onHostRule, do you have a backend with an Host rule for foo.bar.baz ? — Julien SALLEYRON

Julien SALLEYRON Julien SALLEYRON · Accepted Answer · 2018-02-11T07:36:02

You use onHostRule, this will request a certificate from Let's Encrypt for each frontend with a Host rule. But you need your frontent to be assigned to the TLS entrypoint of ACME. (here https).

So in your docker labels, you need to add https on the frontend.entrypoint.

Let's Encrypt with Traefik

2 Answers