Add "monitoring/alert system"

[yarikoptic]

Usecase from @jkosciessa if datalad-registry is used "locally" to register local repos, and the idea is to provide also some specification for monitoring various repos (e.g. in local directories as URL) and setting up alert system within datalad-registry to alert whenever that particular location storage demand exceeds some limit.

[candleindark]

@yarikoptic We can try this out in an ad-hoc manner for now, but for the long run, I think it would be a good idea to associate this kind of feature with an individual user after introducing a user system to Datalad-Registry.

[candleindark]

@jkosciessa I forgot to mention since all the services in Datalad-Registry run in isolated environment of containers. They don't have access to the filesystem or network of the host running Datalad-Registry by default.

If you have datasets residing in your system that you want to submit to a local Datalad-Registry, you can use bind mount to give the worker service access to the dataset. For example, after

datalad-registry/docker-compose.yml

Line 47 in 4da200b

- ${WORKER_PATH_AT_HOST}/data/cache:/data/cache

. You can add another line such as - <PATH__CONTAINING_DATASETS_IN_HOST>:<TARGETED_DIR_IN_THE_WORKER_CONTAINER>.