Host, PathPrefix, regexredirect and stripprefix

Traefik Traefik v2
,
1

Actually I'm using the following config

compose.yaml

services:
  traefik:
    image: traefik:v2.10.1
    container_name: my-traefik-container
    command:
      - "--log.level=ERROR"
      - "--api.insecure=false"
      - "--providers.docker=true"
      - "--providers.docker.exposedbydefault=false"
      - "--entrypoints.websecure.address=:443"
      - "--certificatesresolvers.myresolver.acme.tlschallenge=true"
      - "--certificatesresolvers.myresolver.acme.email=${CERT_EMAIL}"
      - "--certificatesresolvers.myresolver.acme.storage=/letsencrypt/acme.json"
    ports:
      - "443:443"
    volumes:
      - ./letsencrypt:/letsencrypt
      - /var/run/docker.sock:/var/run/docker.sock:ro

  backend:
    build:
      context: ./backend/
      dockerfile: Dockerfile
    container_name: my-backend-container
    restart: on-failure
    env_file: compose-prod.env
    depends_on:
      - alembic
    image: my-project-backend
    command: bash -c "
      sleep 3 &&\
      uvicorn main:app --workers 1 --host 0.0.0.0 --port 8000"
    labels:
      - "traefik.enable=true"

      - "traefik.http.routers.backend.rule=Host(`my-project.dev`, `www.my-project.dev`) && PathPrefix(`/api`)"

      - "traefik.http.routers.backend.entrypoints=websecure"

      - "traefik.http.middlewares.backend-redirect-non-www-to-www.redirectregex.permanent=true"
      - "traefik.http.middlewares.backend-redirect-non-www-to-www.redirectregex.regex=^https?://(?:www.)?(.+)"
      - "traefik.http.middlewares.backend-redirect-non-www-to-www.redirectregex.replacement=https://www.$${1}"
      - "traefik.http.routers.backend.middlewares=backend-redirect-non-www-to-www"

      - "traefik.http.middlewares.backend-strippefix.stripprefix.prefixes=/api"
      - "traefik.http.middlewares.backend-strippefix.stripprefix.forceslash=false"
      - "traefik.http.routers.backend.middlewares=backend-strippefix"

      - "traefik.http.services.backend-loadbalander.loadbalancer.server.port=8000"
      - "traefik.http.routers.backend.service=backend-loadbalander"

      - "traefik.http.routers.backend.tls.certresolver=myresolver"


  frontend:
    build:
      context: ./frontend/
      dockerfile: Dockerfile
    container_name: my-frontend-container
    restart: on-failure
    env_file: compose-prod.env
    depends_on:
      - backend
      - traefik
    image: my-project-frontend
    command: bash -c "
      sleep 4 &&\
      uvicorn main:app --workers 1 --host 0.0.0.0 --port 8001"
    labels:
      - "traefik.enable=true"

      - "traefik.http.routers.frontend.rule=Host(`my-project.dev`, `www.my-project.dev`)"
      
      - "traefik.http.routers.frontend.entrypoints=websecure"

      - "traefik.http.middlewares.frontend-redirect-non-www-to-www.redirectregex.permanent=true"
      - "traefik.http.middlewares.frontend-redirect-non-www-to-www.redirectregex.regex=^https?://(?:www.)?(.+)"
      - "traefik.http.middlewares.frontend-redirect-non-www-to-www.redirectregex.replacement=https://www.$${1}"
      - "traefik.http.routers.frontend.middlewares=frontend-redirect-non-www-to-www"

      - "traefik.http.services.frontend-loadbalander.loadbalancer.server.port=8001"
      - "traefik.http.routers.frontend.service=frontend-loadbalander"

      - "traefik.http.routers.frontend.tls.certresolver=myresolver"

The issue here is the redirectregex from the backend service.

When I try to do a request in frontend service the redirect works fine

➜  ~ curl https://my-project.dev/           
Moved Permanently
➜  ~ curl https://www.my-project.dev/
<!DOCTYPE html>
...

When I do the same request in backend service, this one response the same thing for these requests.

➜  ~ curl https://my-project.dev/api/foo
{"detail":"foo"}
➜  ~ curl https://www.my-project.dev/api/foo
{"detail":"foo"}

I expected that the first request response with Moved Permanently, same happened with frontend service, i.e., I want the API only serves the www domain. For what I tested, this is related with strippefix

2

You seem to overwrite your middleware assignments. Use .middlewares=m1,m2.

1 Like
3

ty for your reply, works!

4

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