Spot Instances Eviction Event Handling

Question

want to read eviction events from outside the instances at a central place and take action like draining the instance or marking it unhealthy based on event type. What is the right way to do so ? Tried looking into scheduled events but will have to poll it every second and it has non-routable ip which can be used from within the instance.
Azure functions or Logic apps ?

Answer 1

Hello Rohit !

Thank you for posting on Microsoft Learn.

You can collect eviction notifications centrally using a custom agent running inside each Spot VM that pushes the event to a centralized Azure Function / Logic App / Event Grid / Event Hub. Here's how:

You must still check /metadata/scheduledevents locally, there’s no way around that because that metadata endpoint is only available within the VM and is non-routable from outside.

You can use a lightweight script or agent to:

• Poll the endpoint (every 1–2 seconds is fine)
• Detect eviction notice (EventType: Preempt)
• Push an event to a central location (Azure Function, Event Hub, etc.)

curl -H Metadata:true "http://169.254.169.254/metadata/scheduledevents?api-version=2020-07-01"

Once the eviction event is detected, forward the payload to a centralized event handler:

• Azure Function (ideal for light logic, retry, webhook-like behavior)
• Azure Logic App (if you prefer no-code flows and integrations)
• Azure Event Hub (for high-throughput event stream)
• Azure Monitor/Log Analytics (optional for diagnostics)