Using own certificate

Traefik Traefik v2
1

I want to use my own certificate with traefik, unfortunately tls is not getting verified. The following error from traefik logs:
dir structure as below

  • docker-compose.yaml
  • certs/tls.yml
  • certs/dev.mydomain.com.crt
  • certs/dev.mydomain.com.key
time="2022-04-29T13:34:35Z" level=debug msg="http: TLS handshake error from 185.188.35.10:7815: remote error: tls: unknown certificate"
time="2022-04-29T13:34:37Z" level=debug msg="Serving default certificate for request: \"self.dev.mydomain.com\""

Here is my docker-compose.yaml

version: "3.3"

services:

  traefik:
    image: "traefik:v2.6"
    container_name: "traefik"
    command:
      - "--log.level=DEBUG"
      - "--api.insecure=true"
      - "--providers.docker=true"
      - "--entrypoints.web.address=:80"
      - "--entrypoints.websecure.address=:443"
      - "--entrypoints.web.http.redirections.entrypoint.to=websecure"
      - "--entrypoints.web.http.redirections.entrypoint.scheme=https"
      - "--providers.file.directory=/etc/certs/"
      - "--providers.file.watch=true"
    ports:
      - "443:443"
      - "8080:8080"
      - "80:80"
    volumes:
      - "/var/run/docker.sock:/var/run/docker.sock:ro"
      - "./certs:/etc/certs"

  fcc:
    image: "nginx"
    container_name: "fcc"
    labels:
      - "traefik.enable=true"
      - "traefik.http.routers.fcc.rule=Host(`self.dev.mydomain.com`)"
      - "traefik.http.routers.fcc.entrypoints=websecure"
      - "traefik.http.routers.fcc.tls=true"

and the
tls.yaml

tls:
  certificates:
    - certFile: ./dev.mydomain.com.crt
      keyFile: ./dev.mydomain.com.key

Where do I do wrong?

2

Does your certificate dev.mydomain.com.crt contain a SAN (Subject Alternate Name) field self.mydomain.com.crt or even *.dev.mydomain.com.crt ?

Steve

3

Hi Steve,

Here is how SAN looks:
X509v3 Subject Alternative Name:
DNS:dev.mydomain.com, DNS:*.dev.mydomain.com

4

Not sure you have the certs location correct - the reference is from the inside of the container - therefore /etc/certs...

tls:
  certificates:
    - certFile: /etc/certs/dev.mydomain.com.crt
      keyFile: /etc/certs/dev.mydomain.com.key
5

I have tried different ways but still getting same issue.

6

Take a look at this:

specifically “Specifying a default certificate“

7

This was my first and main guide, but I must say It is not written clearly, and I did 1:1 as described in the article by altering corresponding part, still no success. :frowning:

8

From your traefik config, the nginx container is listening on https ( traefik.http.routers.fcc.entrypoints=websecure ). Did you install the same certificate on the nginx server?

What do you get if you connect directly to your nginx service with https?

My next step would be to test https to traefik (terminating the https) and then using http to nginx...

Steve

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