Docker - Traefik

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Intro

Following a Working Example how to get Traefik and a few Dummy Containers running on Docker. If you wanna have a bit advanced Example and put some Variables in a “.env” File, you may wanna check this Post.

Requirements

Linux Host with Docker see here, Public IP Adress and rechable Port 80 & 443

two FQDN pointing to your IP:

  • traefik.yourdomain.de
  • whoami.yourdomain.de

Docker Traefik Example

cat << EOF > docker-compose.yml
version: "3.3"

services:
  traefik:
    image: "traefik:v2.9"
    container_name: "traefik"
    command:
      # Traefik Log
      - "--log.level=DEBUG"
      - "--log.filePath=/logs/traefik.log"
      - "--api.insecure=true"
      - "--api.dashboard=true"
      - "--providers.docker=true"
      - "--providers.docker.exposedbydefault=false"
      - "--entrypoints.web.address=:80"
      # Access Log
      - "--accesslog=true"
      - "--accesslog.filePath=/logs/access.log"
      # Prometheus metrics
      ## Enable prometheus metrics
      - "--metrics.prometheus=true"
      ## Create a manual router instead of the default one.
      - "--metrics.prometheus.manualrouting=true"
      - "--metrics.prometheus.addrouterslabels=true"
    ports:
      - "80:80"
    volumes:
      - "/var/run/docker.sock:/var/run/docker.sock:ro"
      - "./logs/:/logs/"
    labels:
      - "traefik.enable=true"
      - "traefik.http.routers.dashboard.rule=Host(`traefik.yourdomain.de`)"
      - "traefik.http.routers.dashboard.entrypoints=web"
      - "traefik.http.routers.dashboard.service=api@internal"
      # Auth: dasboard/XXXXXXXX
      - "traefik.http.routers.dashboard.middlewares=dashboard_auth"
      - "traefik.http.middlewares.dashboard_auth.basicauth.users=dashboard:$$XXXXXXXXXXXXXXXXXXXX"

  whoami:
    image: "traefik/whoami"
    container_name: "simple-service"
    labels:
      - "traefik.enable=true"
      - "traefik.http.routers.whoami.rule=Host(`whoami.yourdomain.de`)"
      - "traefik.http.routers.whoami.entrypoints=web"
EOF

Up

docker compose up -d

Redirect HTTP to HTTPS

replace MAIL@YOURDOMAIN.DE, traefik.yourdomain.de and whoami.yourdomain.de with the appropriate Values …

cat << EOF > docker-compose.yml
version: "3.3"

services:
  traefik:
    image: "traefik:v2.9"
    container_name: "traefik"
    restart: always
    command:
      # Traefik Log
      - "--log.level=DEBUG"
      - "--log.filePath=/logs/traefik.log"
      # Misc
      - "--api.insecure=true"
      - "--providers.docker=true"
      - "--providers.docker.exposedbydefault=false"
      - "--entrypoints.web.address=:80"
      - "--entrypoints.web.http.redirections.entrypoint.to=websecure"
      - "--entrypoints.web.http.redirections.entrypoint.scheme=https"
      - "--entrypoints.websecure.address=:443"
      - "--certificatesresolvers.myresolver.acme.tlschallenge=true"
      - "--certificatesresolvers.myresolver.acme.email=MAIL@YOURDOMAIN.DE"
      - "--certificatesresolvers.myresolver.acme.storage=/letsencrypt/acme.json"
      # Access Log
      - "--accesslog=true"
      - "--accesslog.filePath=/logs/access.log"
    ports:
      - "80:80"
      - "443:443"
    volumes:
      - "/var/run/docker.sock:/var/run/docker.sock:ro"
      - "./letsencrypt:/letsencrypt"
      - "./logs/:/logs/"
    labels:
      - "traefik.enable=true"
      - "traefik.http.routers.traefik_https.rule=Host(`traefik.yourdomain.de`)"
      - "traefik.http.routers.traefik_https.entrypoints=websecure"
      - "traefik.http.routers.traefik_https.tls=true"
      - "traefik.http.routers.traefik_https.tls.certResolver=myresolver"
      - "traefik.http.routers.traefik_https.service=api@internal"
      # Add Basic Auth: dashboard/XXXXXXXXX
      - "traefik.http.routers.traefik_https.middlewares=dashboard_auth"
      - "traefik.http.middlewares.dashboard_auth.basicauth.users=dashboard:$$XXXXXXXXXXXXXXXXXXXX"

  whoami:
    image: "traefik/whoami"
    restart: always
    deploy:
      mode: replicated
      replicas: 5
    labels:
      - "traefik.enable=true"
      - "traefik.http.routers.whoami.rule=Host(`whoami.yourdomain.de`)"
      - "traefik.http.routers.whoami.entrypoints=websecure"
      - "traefik.http.routers.whoami.tls.certresolver=myresolver"
      - "traefik.http.routers.whoami.middlewares=whoami-https"
      - "traefik.http.middlewares.whoami-https.redirectscheme.scheme=https"
EOF

Scale Up

docker compose up -d --scale whoami=10

Scale Up Large

if you have enough RAM … you can go up to 256, or even 512 Instances (~6 GB RAM) …

docker compose up -d --scale whoami=512
Any Comments ?

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