# Observability

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This page was generated from content adapted from the [AWS Developer Guide](https://github.com/awsdocs/aws-app-runner-developer-guide.git)
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## Metrics (CloudWatch)

* **Note**\
  At this time, the console displays only service metrics. To view instance metrics, use the CloudWatch console.

## Event handling (EventBridge)

* **Note**\
  Some services support *pre-defined patterns* in EventBridge. This simplifies how an event pattern is created. You select field values on a form, and EventBridge generates the pattern for you. At this time, App Runner doesn't support pre-defined patterns. You have to enter the pattern as a JSON object. You can use the examples in this topic as a starting point.

## API actions (CloudTrail)

* **Note**\
  For security reasons, some property values are redacted in the logs and replaced with the text `HIDDEN_DUE_TO_SECURITY_REASONS`. This prevents unintended exposure of secret information. However, you can still see that these properties were passed in the request or returned in the response.


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# Agent Instructions: Querying This Documentation

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Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
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Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.