Regex middleware does nothing

Traefik Traefik v2 (latest)
,
1

TLDR:

wanna do https://domain.tld/well-known/carddav -> https://domain.tld/remote.php/dav/. No worky. Why?

      - "traefik.http.middlewares.redirectDavServices.redirectRegex.regex=https://(.*)/.well-known/(card|cal)dav"
      - "traefik.http.middlewares.redirectDavServices.redirectRegex.replacement=https://$${1}/remote.php/dav/"
      - "traefik.http.middlewares.redirectDavServices.redirectRegex.permanent=true"
. . . . . .
      - "traefik.http.routers.${CONTAINER_NAME}-tls.middlewares=redirectDavServices@docker"

I am setting up Nextcloud, behind a Traefik instance. The goal is to forward https://domain.tld/well-known/caldav and https://domain.tld/well-known/carddav to https://domain.tld/remote.php/dav/.

Unfortunately, despite the middleware configuration I'm using here being what everyone says to use for this, it doesn't seem to actually do anything. It is trying to do the forwarding, but only at the .htaccess/apache.conf level, and it incorrectly tries to forward to plain http. Changing the replacement to some other domain does not change behavior.

Full docker-compose.yml:

version: '2'

volumes:
  nextcloud:
  db:

services:
  db:
    user: ${DB_UID}:${DB_GID}
    networks:
      - internal
    image: mariadb
    restart: always
    command: --transaction-isolation=READ-COMMITTED --binlog-format=ROW
    volumes:
      - ${DATA_PATH}/db:/var/lib/mysql
    environment:
      - MYSQL_DATABASE=nextcloud
      - MYSQL_USER=nextcloud
      - MYSQL_ROOT_PASSWORD=${MYSQL_ROOT_PASSWORD}
      - MYSQL_PASSWORD=${MYSQL_PASSWORD}

  app:
    user: ${APP_UID}:${APP_GID}
    networks:
      - internal
      - proxy
    image: nextcloud
    restart: always
    links:
      - db
    volumes:
      - ${DATA_PATH}/data:/var/www/html
    environment:
      - MYSQL_DATABASE=nextcloud
      - MYSQL_USER=nextcloud
      - MYSQL_HOST=db
    expose:
      - ${MAIN_SERVICE_PORT}
    labels:
      ## GENERAL
      - "traefik.enable=true"
      - "traefik.docker.network=proxy"

      ## MIDDLEWARES
      # redirect fixes caldav/carddav issue without relying on .htaccess
      - "traefik.http.middlewares.redirectDavServices.redirectRegex.regex=https://(.*)/.well-known/(card|cal)dav"
      - "traefik.http.middlewares.redirectDavServices.redirectRegex.replacement=https://$${1}/remote.php/dav/"
      - "traefik.http.middlewares.redirectDavServices.redirectRegex.permanent=true"
      # whitelist local network (for testing)
      #- "traefik.http.middlewares.${CONTAINER_NAME}-whitelist.ipWhiteList.sourceRange=${SUBNET_WHITELIST}"
      # traditional user password prompt
      #- "traefik.http.middlewares.basicauth.basicauth.users=${AUTH_USERS}
      # hardening SSL
      - "traefik.http.middlewares.httpHeaders.headers.stsSeconds=15552000"
      - "traefik.http.middlewares.httpHeaders.headers.stsIncludeSubdomains=true"
      - "traefik.http.middlewares.httpHeaders.headers.stsPreload=true"
      - "traefik.http.middlewares.httpHeaders.headers.forceSTSHeader=true"

    ## SERVICES
      - "traefik.http.services.${CONTAINER_NAME}-http.loadbalancer.server.port=${MAIN_SERVICE_PORT}"

    ## ROUTERS
    # https routers
      - "traefik.http.routers.${CONTAINER_NAME}-tls.tls=true"
      - "traefik.http.routers.${CONTAINER_NAME}-tls.rule=Host(`${HOST_NAME}`)"
      - "traefik.http.routers.${CONTAINER_NAME}-tls.entrypoints=websecure"
      - "traefik.http.routers.${CONTAINER_NAME}-tls.service=${CONTAINER_NAME}-http"
      - "traefik.http.routers.${CONTAINER_NAME}-tls.middlewares=redirectDavServices@docker"
      - "traefik.http.routers.${CONTAINER_NAME}-tls.middlewares=httpHeaders@docker"
      #- "traefik.http.routers.${CONTAINER_NAME}-tls.middlewares=${CONTAINER_NAME}-whitelist@docker"

networks:
  proxy:
    external: true
  internal:
    internal: true

.env

# user/group
DB_UID=10310
DB_GID=10310
APP_UID=10311
APP_GID=10311
# container
CONTAINER_NAME=nextcloud
MAIN_SERVICE_PORT=80
SUBNET_WHITELIST=192.168.0.0/24
# domain names
HOST_NAME=domain.tld

# paths
COMPOSE_PATH=/docker/nextcloud/
DATA_PATH=/data/nextcloud
# auth
MYSQL_ROOT_PASSWORD=SomeSQLPasswordButForTheRootAccount
MYSQL_PASSWORD=SomeSQLPassword
2

NEVERMIND, I FIGURED IT OUT.

So, it seems like the router setting middleware thing is a variable assignment that can be overwritten. It accepts a comma-delimited list of middlewares if you want to apply multiple.

So, in my case, I did this:

"traefik.http.routers.${CONTAINER_NAME}-tls.middlewares=httpHeaders@docker, redirectDavServices@docker"

You're welcome, future googlers :slight_smile:

3

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