Why do you need all that on CoreELEC?
You have 2 choices, use another device with Armbian on it, or try Docker on CE.
CE has SMB server.
I’m sure that most of the other things you mentioned have a docker container you could use.
What you say is not entirely true. Entware aarch64-k3.10 for CoreELEC includes the services you named (samba, syncthing, mariadb, mosquitto, and minidlna), it is an excellent repository that is very easy to install and configure, and it has updates several times a year.
I would also like to move my openhab system into the always running odroid N2 that has coreelec preinstalled. I want to keep my kodi alive on the odroid (because that’s why I bought it).
I’ve been looking into docker and was able to install it as an addon in kodi. I can ssh into the odroid and can run commands like docker ps.
I’m a bit stuck on bringing in the openhab environment. I’ve tried these two pages: https://www.openhab.org/docs/installation/docker.html https://hub.docker.com/r/openhab/openhab/
but it starts with making a new user which is not possible on the coreelec. I’m not getting much further. Did anyone succeed in this?