Event-Driven Automation Entry Points
Explore how AWS CloudWatch alarms initiate automation workflows through Systems Manager, learn to trace event handoffs, verify execution with evidence, and troubleshoot common issues in event-driven automation. This lesson equips you to manage and audit automated remediation effectively in AWS environments.
We'll cover the following...
An alarm crossing a threshold and a runbook fixing the problem look, from the outside, like a single event. They're not. Between the moment CloudWatch flips an alarm to ALARM and the moment a target resource actually changes state, there's a chain of handoffs, each one a place where the wiring can be right or wrong, and each one leaving its own trail of evidence.
Here's what that chain looks like when it works. A CloudWatch alarm crosses its threshold, its state flips to ALARM, and within seconds an AWS Systems Manager Automation execution appears with the expected parameters and a role that can act on the target resource. As the runbook steps move to Success, the downstream symptom changes, such as an instance becoming healthy behind a load balancer or a parameter being reset to a safe value.
When the wiring is wrong, the same alarm state transition still shows up, but nothing else does. No delivery evidence appears in the routing layer, no Automation ...