@BrutalBirdie hello here 
Just getting started with Docker / Docker Compose, my Linux skills are not much better and I have a ‘few’ questions 
Setup:
- Mac Mini (2013?) mit Ubuntu 18.04.3 LTS
- Docker & Docker-Compose are running
- openHAB folders and user are created as mentioned here https://www.openhab.org/docs/installation/docker.html
Questions:
- docker-compose.yml
- the openHAB docker guide sets user & group ID for the openHAB container - why is that no necessary in your setup? It seems like you are setting UID & GID only for the grafana container?
According to the guide the IDs should part of the container parameters to avoid file permission issues - wouldn’t that mean, that they should be included into the settings for every container (aka open hab, InfluxDB, etc.)? - you are explicitly pointing to the individual application env-files (for example env.influxdb) is nothing like that necessary for the .env file?
- does the .env file contain the UID &GID for the user openhab or some other user?
- the openHAB docker guide sets user & group ID for the openHAB container - why is that no necessary in your setup? It seems like you are setting UID & GID only for the grafana container?
- env.influxdb
- Is the user ‘openhab_ro’ an read-only account for grafana (as used in Toms InfluxDB & Grafana Guide? Where do you tell Grafana to use that account?
- start.sh
- What does ‘_DIR_="$(cd “$(dirname “${0}”)”; pwd)"’ do?? Something like getting the current path?
- Getting started:
- How do I get started? Do I just copy your scripts into an empty folder, generate the subfolders mentioned in docker-compose.yml, change the standard passwords in env.influxdb and execute start.sh?
Sorry for all these noob questions, tried to answer as much as possible on my own with google, openHAB guides & docker guides 