Middleware \"user-auth@file\" does not exist" after traefik update from 2.8.1 to higher releases

Traefik Traefik v2
,
1

After the update from 2.8.1 to higher releases (up to the latest stable 2.8.5) error message "user-auth@file does not exist" persists. Rolling back to 2.8.1 helps to solve the issue. Obviously during the update and rolling back the corresponding file is untouched.

My configuration:

version: "3.7"

services:
  traefik:
    image: traefik:2.8.5
    container_name: traefik
    restart: unless-stopped
    security_opt:
      - no-new-privileges:true
    networks:
      - proxy
    ports:
      - 80:80
      - 443:443
    environment:
      - CF_API_EMAIL=email@gmail.com
      - CF_DNS_API_TOKEN=$TOKEN
    volumes:
      - /etc/localtime:/etc/localtime:ro
      - /var/run/docker.sock:/var/run/docker.sock:ro
      - /home/docker/traefik/data/traefik.yml:/traefik.yml:ro
      - /home/docker/traefik/data/acme.json:/acme.json
      - /home/docker/traefik/data/dynamic.yml:/dynamic.yml:ro
    labels:
      - "traefik.enable=true"
      - "traefik.http.routers.traefik.entrypoints=https"
      - "traefik.http.routers.traefik.rule=Host(`traefik.domainname.com`)"
      - "traefik.http.routers.traefik.middlewares=https-redirect@file"
      - "traefik.http.routers.traefik.middlewares=user-auth@file"
      - "traefik.http.routers.traefik.tls=true"
      - "traefik.http.routers.traefik.tls.certresolver=cloudflare"
      - "traefik.http.routers.traefik.tls.domains[0].main=*.domainname.com"
      - "traefik.http.routers.traefik.tls.domains[0].sans=domainname.com"
      - "traefik.http.routers.traefik.service=api@internal"

networks:
  proxy:
    external:
      name: proxy
  default:
    driver: bridge

Part of dynamic.yml has the below structure:

# Declaring the user list
http:
  middlewares:
    user-auth:
      basicAuth:
        users:
          - "test:$apr1$H6uskkkW$IgXLP6ewTrSuBkTrqE8wj/"

Static config has following instruction where to look for a dynamic config:

providers:
  docker:
    endpoint: "unix:///var/run/docker.sock"
    exposedByDefault: false
  file:
    filename: /dynamic.yml
    watch: true
2

Hello,

can you provide the full debug logs?

Have you checked all the content of dynamic.yml with the JSON schema of the dynamic configuration?

3

Note, you cannot use several time the same labels (traefik.http.routers.traefik.middlewares)

If you want to set several middlewares on one router you have to do that:

    - "traefik.http.routers.traefik.middlewares=https-redirect@file,user-auth@file"
4

Hello @Idez,

Many thanks for your comments! They helped me to detect the source of my issue and solve it finally!
Only today I noticed another error message that actually occurred first after I run the service:

level=error msg="Cannot start the provider *file.Provider: yaml: unmarshal errors:\n  line 40: mapping key \"contentTypeNosniff\" already defined at line 33\n  line 41: mapping key \"stsPreload\" already defined at line 36"

As a result, the service was not able to read any line after. I really don't know why I haven't noticed it before :slight_smile: I was sure that the only error messages related to the service were the ones I specified above.
Nonetheless after I analyzed my dynamic config I found several identical lines which conflicted with a more strict parsing of the dynamic configuration for "array" types (as was explained by @rtribotte here)

Thank you all for your assistance!

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5

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