AWS Lambda now supports Availability Zone metadata
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This article announces AWS Lambda's new Availability Zone metadata capability, enabling developers to determine which AZ their Lambda function is running in.
- Lambda functions can now retrieve AZ ID via new metadata endpoint
- Enables AZ-aware routing decisions to reduce cross-AZ latency
- Supports AZ-specific fault injection testing and resilience patterns
- Works with all Lambda runtimes, container images, SnapStart, and provisioned concurrency
- Available at no additional cost in all AWS Regions where Lambda operates
- Access via Powertools for AWS Lambda or direct HTTP requests
This feature simplifies building serverless applications that optimize performance by routing requests to same-AZ endpoints.
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