Migration to Traefik with Nextcloud/LinuxServer image: need help!

I tried. It did not work: “too many redirects” is now the error in the browser. Other containers do work with this configuration.

Here we go:

docker-compose.yml

# Traefik
  Traefik:
    container_name: traefik
    image: traefik:latest
    restart: always
    security_opt:
      - no-new-privileges:true
    volumes:
      - /etc/localtime:/etc/localtime:ro
      - /var/run/docker.sock:/var/run/docker.sock:ro
      - ${APPDATA}/Traefik/traefik.yml:/traefik.yml
      - ${APPDATA}/Traefik/dynamic.yml:/dynamic.yml
      - ${APPDATA}/Traefik/acme.json:/acme.json:ro
      - ${APPDATA}/Traefik/traefik.log:/traefik.log
    labels:
      - "traefik.enable=true"
      - "traefik.docker.network=proxy"
      - "traefik.http.routers.traefik-secure.entrypoints=websecure"
      - "traefik.http.routers.traefik-secure.rule=Host(`${TTDOMAIN}`)"
      - "traefik.http.routers.traefik-secure.service=api@internal"
      - "traefik.http.routers.traefik-secure.middlewares=user-auth@file"
    ports:
      - 82:80
      - 446:443
    networks:
      - proxy

# Nextcloud
  nextcloud:
    container_name: nextcloud
    image: linuxserver/nextcloud
    restart: always
    environment:
      - PUID=${PUID}
      - PGID=${PGID}
      - TZ=${TZ}
    volumes:
      - ${APPDATA}/Nextcloud:/config
      - ${NEXTCLOUD}:/data
      - ${DOWNLOADS}:/extern/downloads
      - ${MEDIA}:/extern/mediabieb
      - ${PERSOONLIJK}:/extern/persoonlijk
      - ${UPLOADMAP}:/extern/uploadmap
      - ${WATCHED}:/extern/watched
    depends_on:
      - mariadb
    labels:
      - "traefik.enable=true"
      - "traefik.docker.network=proxy"
      - "traefik.http.routers.nextcloud-secure.entrypoints=websecure"
      - "traefik.http.routers.nextcloud-secure.rule=Host(`${NCTDOMAIN}`)"
    networks:
      - proxy
      - nextcloud_net
  mariadb:
    container_name: nextclouddb
    image: linuxserver/mariadb
    restart: always
    environment:
      - PUID=${PUID}
      - PGID=${PGID}
      - TZ=${TZ}
      - MYSQL_ROOT_PASSWORD=${NCDBROOTPASS}
      - MYSQL_DATABASE=${NCDBNAME}
      - MYSQL_USER=${NCDBUSER}
      - MYSQL_PASSWORD=${NCDBPASS}
    volumes:
      - ${APPDATA}/Nextclouddb:/config
    networks:
      - nextcloud_net

networks:
  proxy:
    driver: bridge
    external: true
  nextcloud_net:
    external: false

traefik.yml

api:
  dashboard: true

log:
  level: ERROR
  filepath: traefik.log

entryPoints:
  web:
    address: :80
    http:
      redirections:
        entryPoint:
          to: websecure

  websecure:
    address: :443
    http:
      middlewares:
        - secureHeaders@file
      tls:
        certResolver: letsencrypt

providers:
  docker:
    endpoint: "unix:///var/run/docker.sock"
    exposedByDefault: false
  file:
    filename: dynamic.yml

certificatesResolvers:
  letsencrypt:
    acme:
      email: [REDACTED]
      storage: acme.json
      keyType: EC384
      httpChallenge:
        entryPoint: web

dynamic.yml

http:
  middlewares:
    secureHeaders:
      headers:
        sslRedirect: true
        forceSTSHeader: true
        stsIncludeSubdomains: true
        stsPreload: true
        stsSeconds: 31536000

    user-auth:
      basicAuth:
        users:
          - "[REDACTED]"

tls:
  options:
    default:
      cipherSuites:
        - TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
        - TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
        - TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
        - TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
        - TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305
        - TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305
      minVersion: VersionTLS12

I changed this back because I got a 404 error.

Nextcloud/nginx/site-confs/default

upstream php-handler {
    server 127.0.0.1:9000;
}
server {
    listen 80;
    listen [::]:80;
    server_name _;
    return 301 https://$host$request_uri;
}
server {
    listen 443 ssl http2;
    listen [::]:443 ssl http2;
    server_name _;
    ssl_certificate /config/keys/cert.crt;
    ssl_certificate_key /config/keys/cert.key;

    # Add headers to serve security related headers
    # Before enabling Strict-Transport-Security headers please read into this
    # topic first.
    #add_header Strict-Transport-Security "max-age=15768000; includeSubDomains; preload;" always;
    #
    # WARNING: Only add the preload option once you read about
    # the consequences in https://hstspreload.org/. This option
    # will add the domain to a hardcoded list that is shipped
    # in all major browsers and getting removed from this list
    # could take several months.

    add_header X-Content-Type-Options nosniff;
    add_header X-XSS-Protection "1; mode=block";
    add_header X-Robots-Tag none;
    add_header X-Download-Options noopen;
    add_header X-Frame-Options "SAMEORIGIN";
    add_header X-Permitted-Cross-Domain-Policies none;
    add_header Referrer-Policy no-referrer;
    fastcgi_hide_header X-Powered-By;
    root /config/www/nextcloud/;
    # display real ip in nginx logs when connected through reverse proxy via docker network
    set_real_ip_from 172.0.0.0/8;
    real_ip_header X-Forwarded-For;
    location = /robots.txt {
        allow all;
        log_not_found off;
        access_log off;
    }
    location = /.well-known/carddav {
      return 301 $scheme://$host:$server_port/remote.php/dav;
    }
    location = /.well-known/caldav {
      return 301 $scheme://$host:$server_port/remote.php/dav;
    }
    location = /.well-known/webfinger {
      return 301 $scheme://$host:$server_port/public.php?service=webfinger;
    }
    location = /.well-known/host-meta {
      return 301 $scheme://$host:$server_port/public.php?service=host-meta;
    }
    location = /.well-known/host-meta.json {
      return 301 $scheme://$host:$server_port/public.php?service=host-meta-json;
    }
    client_max_body_size 10G;
    fastcgi_buffers 64 4K;
    gzip on;
    gzip_vary on;
    gzip_comp_level 4;
    gzip_min_length 256;
    gzip_proxied expired no-cache no-store private no_last_modified no_etag auth;
    gzip_types application/atom+xml application/javascript application/json application/ld+json application/manifest+json application/rss+xml application/vnd.geo+json application/vnd.ms-fontobject application/x-font-ttf application/x-web-app-manifest+json application/xhtml+xml application/xml font/opentype image/bmp image/svg+xml image/x-icon text/cache-manifest text/css text/plain text/vcard text/vnd.rim.location.xloc text/vtt text/x-component text/x-cross-domain-policy;
    location / {
        rewrite ^ /index.php;
    }
    location ~ ^\/(?:build|tests|config|lib|3rdparty|templates|data)\/ {
        deny all;
    }
    location ~ ^\/(?:\.|autotest|occ|issue|indie|db_|console) {
        deny all;
    }
    location ~ ^\/(?:index|remote|public|cron|core\/ajax\/update|status|ocs\/v[12]|updater\/.+|oc[ms]-provider\/.+|.+\/richdocumentscode\/proxy)\.php(?:$|\/) {
        fastcgi_split_path_info ^(.+?\.php)(\/.*|)$;
        set $path_info $fastcgi_path_info;
        try_files $fastcgi_script_name =404;
        include /etc/nginx/fastcgi_params;
        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
        fastcgi_param PATH_INFO $path_info;
        fastcgi_param HTTPS on;
        fastcgi_param modHeadersAvailable true;
        fastcgi_param front_controller_active true;
        fastcgi_pass php-handler;
        fastcgi_intercept_errors on;
        fastcgi_request_buffering off;
    }
    location ~ ^\/(?:updater|oc[ms]-provider)(?:$|\/) {
        try_files $uri/ =404;
        index index.php;
    }
    location ~ \.(?:css|js|woff2?|svg|gif|map)$ {
        try_files $uri /index.php$request_uri;
        add_header Cache-Control "public, max-age=15778463";
        # Add headers to serve security related headers
        # Before enabling Strict-Transport-Security headers please read into this
        # topic first.
        #add_header Strict-Transport-Security "max-age=15768000; includeSubDomains; preload;" always;
        #
        # WARNING: Only add the preload option once you read about
        # the consequences in https://hstspreload.org/. This option
        # will add the domain to a hardcoded list that is shipped
        # in all major browsers and getting removed from this list
        # could take several months.
        add_header X-Content-Type-Options nosniff;
        add_header X-XSS-Protection "1; mode=block";
        add_header X-Robots-Tag none;
        add_header X-Download-Options noopen;
        add_header X-Frame-Options "SAMEORIGIN";
        add_header X-Permitted-Cross-Domain-Policies none;
        add_header Referrer-Policy no-referrer;
        access_log off;
    }
    location ~ \.(?:png|html|ttf|ico|jpg|jpeg|bcmap|mp4|webm)$ {
        try_files $uri /index.php$request_uri;
        access_log off;
    }
}

The other files are not changed. Hope you can make something of it.