Best practices for deploying in a test bench and real world

Question

Best practices for deploying in a test bench and real world

rfuentess 45

Hi!

I'm still a rookie to Microsoft's Azure IoT Edge, and I'm trying to understand the best approach for what I think is a typical scenario:

We want to deploy 3 machines: IoT-A, IoT-B, and IoT-C. Since these machines aren't easily accessible, I want to first deploy to a controlled test bench where I have 3 replicas: Shadow-A, Shadow-B, and Shadow-C.

My question is about handling manifest deployment across these machines. Should I:

Create 6 IoT Edge devices and use regular expressions to select the deviceId? (e.g., IoT-* for final release, Shadow-* for local testing)
Or should I use tags instead?

Also, is it possible to have 2 machines with the same deviceID running simultaneously?

Manas Mohanty 8,150 Reputation points Microsoft External Staff Moderator

2025-07-30T07:50:51.6333333+00:00

Hi rfuentess

Sorry for the late response. Here are answer to your queries

Tags are useful for grouping and targeting device for update. Device ID should be unique with respect to each device which would identity the devices in real time operation

Regarding Test bench and Real-world application

You can start with individual enrollment and test provision devices at scale

A deployment manifest that describes which modules to deploy, how data flows between the modules, and desired properties of the module twins.

so, it dictates the data flow between cloud and IOT edge through module and should be version controlled for group of devices.

Reference - https://learn.microsoft.com/en-us/azure/iot-edge/module-composition?source=recommendations#create-a-deployment-manifest

Thank you

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Manas Mohanty 8,150 Reputation points Microsoft External Staff Moderator

2025-07-30T07:50:51.6333333+00:00

Hi rfuentess

Sorry for the late response. Here are answer to your queries

Tags are useful for grouping and targeting device for update. Device ID should be unique with respect to each device which would identity the devices in real time operation

Regarding Test bench and Real-world application

You can start with individual enrollment and test provision devices at scale

A deployment manifest that describes which modules to deploy, how data flows between the modules, and desired properties of the module twins.

so, it dictates the data flow between cloud and IOT edge through module and should be version controlled for group of devices.

Reference - https://learn.microsoft.com/en-us/azure/iot-edge/module-composition?source=recommendations#create-a-deployment-manifest

Thank you

Answer 1

Jose Benjamin Solis Nolasco 4,986

Well, some advice about how you could archive

Device Identity: NEVER Reuse deviceIds Simultaneously

You cannot have two devices (test and prod) with the same deviceId registered and connected at the same time.
Azure IoT Hub enforces unique deviceIds, and if two devices connect with the same ID, the second will disconnect the first.
Use separate deviceIds for test (e.g. Shadow-A) and prod (IoT-A).

Create Separate IoT Edge Devices for Test and Prod

Yes — create 6 separate IoT Edge devices:
Test bench: Shadow-A, Shadow-B, Shadow-C
Real world: IoT-A, IoT-B, IoT-C

Use Deployment Manifests per Environment

Create separate IoT Edge deployment manifests:

test-bench-deployment.json

production-deployment.json

These can be mostly the same, but you can customize:

Module versions (e.g. latest vs stable)

Environment variables

Logging or debug modules

😊 If my answer helped you resolve your issue, please consider marking it as the correct answer. This helps others in the community find solutions more easily. Thanks!

Jose Benjamin Solis Nolasco 4,986 Reputation points

2025-07-29T13:28:24.4933333+00:00

@rfuentess Just following up, Do you need more guidance or assistance ?
rfuentess 45 Reputation points

2025-07-30T06:11:19.9733333+00:00

Just one question, why the deployment can be configured in such a way that multiple devices receive the same manifest file?
Sander van de Velde | MVP 36,941 Reputation points MVP Volunteer Moderator

2025-07-30T18:29:24.9533333+00:00

Hello @rfuentess ,

do you mean 'why' or 'how'?

If 'Why', I'm not sure if it's possible to send the same deployment manifest to two devices if credentials are reused. As seen above, credentials must not be reused. This will give unwanted behavior.

So, if you want to distribute the some deployment manifest to multiple machines, check out layered deployment and see how devices having the same 'features' get the same logic.
rfuentess 45 Reputation points

2025-07-31T07:09:50.9433333+00:00

True, I was not taking into consideration the creds being different. The --target-condition may use only the deviceID parameter, but the creds should be taken into consideration.

Thanks!

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Best practices for deploying in a test bench and real world

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