Local development support for Traefik v1 and v2 in the same project

docker-compose.override.yml

version: '3.7'

services:

  app:
    labels:
      # Traefik 2 labels, note that I point to container_name of app service with ${COMPOSE_PROJECT_NAME}-app.
      - "traefik.http.routers.${COMPOSE_PROJECT_NAME}-app.entrypoints=https"
      - "traefik.http.routers.${COMPOSE_PROJECT_NAME}-app.rule=Host(`${APP_HOSTNAME}`)"
      - "traefik.http.routers.${COMPOSE_PROJECT_NAME}-app.tls=true"
      - "traefik.http.services.${COMPOSE_PROJECT_NAME}-app.loadbalancer.server.port=8080"
      - "traefik.docker.network=my-network"

docker-compose.yml

version: '3.7'

services:

  app:
    hostname: "${APP_HOSTNAME}"
    container_name: "${COMPOSE_PROJECT_NAME}-app"
    image: "${APP_IMAGE}"
    volumes:
      - .:/app:delegated
    environment:
      APP_ENV: "${APP_ENV}"
    networks:
      - internal
      - my-network
    labels:
      # Shared label for both Traefik 1 and 2
      traefik.enable: true
      # Traefik 1 labels
      traefik.port: 8080
      traefik.frontend.rule: "Host:${APP_HOSTNAME}"
      traefik.frontend.redirect.entryPoint: https

  db:
    container_name: "${COMPOSE_PROJECT_NAME}-db"
    image: mysql:5.7
    volumes:
      - db_data:/var/lib/mysql
    ports:
      - 3306
    networks:
      - internal

networks:
  internal:
    external: false
  my-network:
    external: true

volumes:
  db_data:

Traefik v1.7 or v2.2 is running on the same network (my-network).

Labels can be also in the same file but then they need to be written in following format:

labels:
  - "laber_name=label_value"

instead of

labels:
  laber_name: "label_value"