alert with event hub

Hanna 220

How could I create an alert in Slack every time a failure log enters my event hub?

1 answer

Sander van de Velde | MVP 32,556 Reputation points MVP

2023-10-30T17:08:56.9666667+00:00

Hello @YohannadeOliveira-7180,

welcome to this moderated Azure community forum.

if you want to react to certain messages coming from an Event Hub, try the Azure Logic Apps solution.

Logic Apps provides a no-code flow diagram and supports Slack:

Note: you can also use Power Apps if you are knowledgeable about that platform.

You can post messages:

To send these messages, you need to listen for Event Hub messages, using the event hub connector:

I recommend starting with this free MS Learn training about Logic apps.

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Hanna 220 Reputation points

2023-10-30T17:28:14.2866667+00:00

But how would I get just the error messages? I'm used to doing it with log workspace but they told me that with event Hub the final value would be better

Sander van de Velde | MVP 32,556 Reputation points MVP

2023-10-30T17:41:12.17+00:00

Hello YohannadeOliveira-7180,

if you only need a subset of the incoming messages, the alerts, you need to filter.

The Event Hub itself cannot filter. It only sends incoming, produced, messages to consumer services.

I'm not sure how the messages are created, perhaps the producer (like an IoT Hub) can filter and send alerts to a second Event Hub?

If you can only filter AFTER the messages arrive, eg. with services like Azure Functions or Azure Stream Analytics

General Event Hub -> Stream Analytics or Azure Function -> Alert Event Hub -> Logic App.

An alternative scenario is to consume all messages in the Logic app and filter out alerts there, by adding a condition action in the flow.

Hanna 220 Reputation points

2023-10-30T17:45:59.7333333+00:00

Do you think it's better to use Log Workspace + Logic App with a Logic App consultation every 10 minutes or use EventHub?

Sander van de Velde | MVP 32,556 Reputation points MVP

2023-10-30T17:55:37.88+00:00

Hello @YohannadeOliveira-7180,

Azure Log Analytics workspace, part of Azure Monitor, is a separate service. It can be used to monitor services but it also supports custom messages.

This could be used too but I believe it comes already with an alert rules option.

From there Logic App can be accessed too:

Can you describe where your messages are coming from and how these are put in the Event Hub?
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