azure-functions-host

With Azure Functions, the runtime[1] is open source, and the development tooling for VSCode makes it easy to run them locally [2], starting up in a few seconds. You pass in your database keys etc as environmental variables, and it integrates nicely with the IoT Hub tooling so you can debug the whole device sends message -> function gets hit flow in one window. However, I have had this break in places before, and not really been able to figure out why from what is going on under the hood, needing to restart various parts to get it working. Checking the contents of the database is annoyingly manual, requiring a seperate GUI only tool[3] and hitting the refresh button a lot, a "watch" window would be much nicer. Profiling once deployed is also difficult, I ended up having to inject timestamps at various different places to try and measure en

It's MIT, and the host is built on .NET Core, so you can run it on Linux if you want: https://github.com/Azure/azure-functions-host Under Satya Nadella the change in Microsoft has been little short of astonishing. A few years ago, I could understand the continued cynicism - but if anything the pace of change has only intensified.

You should of gone a little further, the core tools are for local testing if I remember correctly, but the back-end is here: https://github.com/Azure/azure-functions-host