Provision of Prometheus metrics

[storckmi]

Have you considered adding Prometheus (https://prometheus.io/) metrics to the DSF?

The question about monitoring in general and metrics in particular came up at the MII Community Dialog (https://confluence.imi.med.fau.de/pages/viewpage.action?pageId=235843877). Since we are currently looking at how we do monitoring at our MeDIC, we had looked at Prometheus and found it to be good or at least worth trying out. It would be nice if the processes of the DSF could provide Prometheus metrics directly, like throughput, number of requests, runtime of the requests (min, max, average)....

Blaze provides Prometheus metrics as well, so it would be easy to integrate the different systems of a MeDIC in one monitoring platform.