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Step by Step Setup Guide for Authelia

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This article provides detailed instructions on integrating Authelia as a middleware with Traefik. Using Docker labels for configuration, this setup allows Traefik to query Authelia for authorization on every web request. Authelia validates session cookies and access permissions for secure resource control. The information is partially sourced from Brynn Crowley, referencing his setup guide.

Prerequisites

Important Notes

Configuration uses Docker labels directly in docker-compose.yaml to configure the Traefik Middleware.
Examples use a whoami application for demonstration.
Advanced configurations (e.g., SMTP) are available in Authelia documentation.

Step-by-Step Guide

Step 1: Create Folders in the GlusterFS

mkdir -p /mnt/glustermount/data/authelia_data/
mkdir -p /mnt/glustermount/data/authelia_data/logs
mkdir -p /mnt/glustermount/data/authelia_data/config
mkdir -p /mnt/glustermount/data/authelia_data/secrets

Step 2: Create External Network for Traefik Proxy (if not already done)

Create the management_net network:

docker network create -d overlay management_net

Step 3: Configure User Database

Create a basic user database:

nano mkdir -p /mnt/glustermount/data/authelia_data/config/users.yml

Paste this Content:

users:
  authelia: ## Username
    displayname: 'Authelia User'
    ## WARNING: This is a default password for testing only!
    ## IMPORTANT: Change this password before deploying to production!
    ## Generate a new hash using the instructions at:
    ## https://www.authelia.com/reference/guides/passwords/#passwords
    ## Password is 'authelia'
    password: '$6$rounds=50000$BpLnfgDsc2WD8F2q$Zis.ixdg9s/UOJYrs56b5QEZFiZECu0qZVNsIYxBaNJ7ucIL.nlxVCT5tqh8KHG8X4tlwCFm5r6NTOZZ5qRFN/'
    email: '[email protected]'
    groups:
      - 'admin'
      - 'dev'

The current password listed is authelia. It is important you Generate a new password hash.

Step 3.1: Generate Password Hash (Optional)

docker run --rm -it authelia/authelia:latest authelia crypto hash generate argon2

Step 4: Create Secrets

docker run --rm -u 8000:8000 -v /mnt/glustermount/data/authelia_data/secrets:/secrets docker.io/authelia/authelia \
  sh -c "cd /secrets && authelia crypto rand --length 64 session_secret.txt storage_encryption_key.txt jwt_secret.txt"

Step 5: Create Docker Compose

It is important to know that Traefik needs to wait for Authelia to startup. Thats what the depends Function is for.
Otherwise Traefik will not notice the Authelia Middleware and maybe provide an Error.

version: '3.3'

services:
  traefik:
    user: 0:0 #Container being started with Root rights
    image: 'traefik:latest'
    security_opt:
      - 'no-new-privileges=true'
    restart: 'unless-stopped'
    depends_on:
      - authelia
    ports:
      # The Web UI (enabled by --api.insecure=true in traefik.toml)
      - '8080:8080'
      # The Available Ports (forward your router's incoming ports to the ports on the host)
      - '80:80'
      - '443:443'
    networks:
      management_net:
        aliases:
          - 'auth.domain.com'
      authelia: {}
    volumes:
      # So that Traefik can listen to the Docker events (read-only)
      - '/var/run/docker.sock:/var/run/docker.sock:ro'
      # LetsEncrypt ACME Configuration
      - '/mnt/glustermount/data/traefik_data/acme.json:/le/acme.json'
      # Mount for Traefik AccessLog
      - '/mnt/glustermount/data/traefik_data/access.log:/access.log'
      # (STATIC CONFIG)
      - './traefik/config/traefik.yml:/traefik.yml:ro'
      # (DYNAMIC CONFIG)
      - './traefik/config/dynamic.yml:/dynamic.yml:ro'

    environment:
      - TZ=Europe/Zurich
    deploy:
      mode: replicated
      replicas: 1
      labels:
        - 'traefik.enable=true'
        - 'traefik.http.routers.traefik.rule=Host(`traefik.domain.com`)'
        - 'traefik.http.routers.traefik.service=api@internal'
        - 'traefik.http.services.traefik.loadbalancer.server.port=8080'
        - 'traefik.http.routers.traefik.tls.certresolver=leresolver'
        - 'traefik.http.routers.traefik.entrypoints=websecure'
        - 'traefik.http.routers.http-catchall.rule=hostregexp(`{host:.+}`)'
        - 'traefik.http.routers.http-catchall.entrypoints=web'
        - 'traefik.http.routers.http-catchall.middlewares=redirect-to-https'
        - 'traefik.http.middlewares.redirect-to-https.redirectscheme.scheme=https'
        #Authelia Integration
        - 'traefik.http.routers.dashboard.middlewares=authelia@docker'

  authelia:
    image: 'authelia/authelia:4.38'
    container_name: 'authelia'
    volumes:
      - '/mnt/glustermount/data/authelia_data/secrets:/secrets:ro'
      - '/mnt/glustermount/data/authelia_data/config:/config'
      - '/mnt/glustermount/data/authelia_data/logs:/var/log/authelia/'
    networks:
      authelia: {}
      management_net: {}
    labels:
      ## Expose Authelia through Traefik
      traefik.enable: 'true'
      traefik.docker.network: 'authelia'
      traefik.http.routers.authelia.rule: 'Host(`auth.domain.com`)'
      traefik.http.routers.authelia.entrypoints: 'websecure'
      traefik.http.routers.authelia.tls.certresolver: 'leresolver'
      traefik.http.services.authelia.loadbalancer.server.port: '9091'
      ## Setup Authelia ForwardAuth Middlewares
      traefik.http.middlewares.authelia.forwardAuth.address: 'http://traefik_authelia:9091/api/authz/forward-auth'
      traefik.http.middlewares.authelia.forwardAuth.trustForwardHeader: 'true'
      traefik.http.middlewares.authelia.forwardAuth.authResponseHeaders: 'Remote-User,Remote-Groups,Remote-Name,Remote-Email'
    environment:
      TZ: 'Europe/Zurich'
      X_AUTHELIA_CONFIG_FILTERS: 'template'

  whoami-secure:
    image: 'traefik/whoami'
    restart: 'unless-stopped'
    container_name: 'whoami-secure'
    depends_on:
      - authelia
    labels:
      traefik.enable: 'true'
      traefik.http.routers.whoami-secure.rule: 'Host(`whoami-secure.domain.com`)'
      traefik.http.routers.whoami-secure.entrypoints: 'websecure'
      traefik.http.routers.whoami-secure.middlewares: 'authelia@docker'
      traefik.http.services.whoami-secure.loadbalancer.server.port: '80'
      traefik.http.routers.whoami-secure.tls.certresolver: 'leresolver'
    networks:
      management_net: {}
networks:
  management_net:
    external: true  # Primary network for management
  authelia:

Step 6: Start the Stack

You can either do that with the provided Command or start the Stack with Portainer.

docker compose up -d

Step 7: Verify Setup

Now you are ready to Setup with further Configuration.

It is possible to add Authelia Middleware to your Custom Applications by adding:
traefik.http.routers.YOUR-APPLICATION.middlewares: 'authelia@docker'

Troubleshooting

  • Check logs: docker logs authelia
  • Ensure secret files exist and have correct permissions.
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