The implementation of the HowTo Question about HowTo https://help.nextcloud.com/t/howto-ubuntu-docker-nextcloud-talk-collabora/76430/11 brings error message Internal server error

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1

Many thanks @KarlF12 for the HowTo, which is in my opinion extensive and well described. Nevertheless I can’t get the Nextcloud to work.
My configuration:
Operating system: Ubuntu 20.04.1 LTS

I installed and updated the operating system on my server and worked through the HowTo step by step. The information for my server I have adapted accordingly.
If I now call the page, I get the error message:

Internal server error
The server could not complete the request.
If this happens again, please send the following technical details to your server administrator.
More details can be found in the server log.
Technical Details

Remote address: 172.18.0.1
Request identifier: KtXKUOfY1yc02hrxPX54

When I call the Collabora subdomain I get the Apache default index (that’s right, as I read in the discussion of the HowTo).

I don’t think that the error comes from the reverse proxy. The requests are forwarded correctly. Also the correct certificates are displayed. I just can’t see where the error could be.

Thanks for the help!

2

The internal server error is often (but not always) the result of an issue connecting to the database. Can you show your docker-compose.yml?

3

Oh, thank you very much for the quick response.
My docker-compose.yml now looks like this:

version: '3.7'

networks:
 nextcloud:

services:
  nextcloud:
    image: nextcloud
    container_name: nextcloud
    networks:
      - nextcloud
    ports:
      - "127.0.0.1:8080:80"
    volumes:
      - ${NEXTCLOUD_ROOT}/html:/var/www/html
      - ${NEXTCLOUD_ROOT}/data:/srv/nextcloud/data
    extra_hosts:
      - "${NEXTCLOUD_FQDN}:${NEXTCLOUD_IPADDRESS}"
      - "${COLLABORA_FQDN}:${NEXTCLOUD_IPADDRESS}"
    depends_on:
      - mariadb
      - redis
    environment:
      - NEXTCLOUD_TRUSTED_DOMAINS='${NEXTCLOUD_FQDN}'
      - NEXTCLOUD_DATA_DIR=/srv/nextcloud/data
      - MYSQL_DATABASE=nextcloud
      - MYSQL_USER=nextcloud
      - MYSQL_PASSWORD=${MYSQL_PASSWORD}
      - MYSQL_HOST=nextcloud-mariadb
      - REDIS_HOST=nextcloud-redis
    restart: unless-stopped

  mariadb:
    image: mariadb
    container_name: nextcloud-mariadb
    restart: unless-stopped
    volumes:
      - ${NEXTCLOUD_ROOT}/mariadb:/var/lib/mysql
    environment:
      - MYSQL_ROOT_PASSWORD=${MYSQL_ROOT_PASSWORD}
      - MYSQL_PASSWORD=${MYSQL_PASSWORD}
      - MYSQL_DATABASE=nextcloud
      - MYSQL_USER=nextcloud
    networks:
      - nextcloud

  redis:
    image: redis
    container_name: nextcloud-redis
    networks:
      - nextcloud
    restart: unless-stopped

  coturn:
    image: instrumentisto/coturn
    container_name: nextcloud-coturn
    restart: unless-stopped
    ports:
      - "3478:3478/tcp"
      - "3478:3478/udp"
    networks:
      - nextcloud
    command:
      - -n
      - --log-file=stdout
      - --min-port=49160
      - --max-port=49200
      - --realm=${NEXTCLOUD_FQDN}
      - --use-auth-secret
      - --static-auth-secret=${COTURN_SECRET}

  collabora:
    image: collabora/code
    container_name: nextcloud-collabora
    restart: unless-stopped
    networks:
      - nextcloud
    ports:
      - "127.0.0.1:9980:9980"
    extra_hosts:
      - "${NEXTCLOUD_FQDN}:${NEXTCLOUD_IPADDRESS}"
      - "${COLLABORA_FQDN}:${NEXTCLOUD_IPADDRESS}"
    environment:
      - 'domain=${NEXTCLOUD_FQDN}'
      - 'dictionaries=en'
    cap_add:
      - MKNOD
    tty: true