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The latest update to Prometheus (version 2.26.0), an open-source toolkit for system monitoring and alerting, has introduced support for AWS Signature Version 4 authentication. This enhancement allows the Prometheus server to directly make remote-write API requests to the Amazon Managed Service for Prometheus (AMP) without needing a proxy sidecar container, such as the AWS SigV4 container. The feature was implemented through GitHub pull request PR 8509, which incorporates the AWS Signature Version 4 authentication code from the Grafana Cloud Agent. This implementation utilizes the AWS SDK for Go to facilitate this capability.
What is AWS Signature Version 4?
So, what exactly is AWS Signature Version 4? It is a method used to add authentication details to HTTP requests made to AWS APIs. The AWS Command Line Interface (CLI) and AWS SDKs already employ this protocol for API calls. For an in-depth understanding of the Signature Version 4 signing process, you can read the AWS documentation.
How Signature Version 4 Works with AMP
In terms of how Signature Version 4 works with AMP, this feature leverages the SDK for Go, as indicated in the sigv4.go file within the repository. AWS SDKs natively use the Signature Version 4 authentication mechanism to communicate with AWS APIs. Consequently, metric ingestion requests made from the Prometheus server to the AMP workspace via the remote write API endpoints now utilize the Signature Version 4 protocol.
You can visualize this change in the accompanying diagram. For more detailed guidance on how to utilize this new setup, be sure to check out the updated getting started blog post.
Further Exploration
In conclusion, to further explore the Amazon Managed Service for Prometheus (AMP), consult the user guide. If you’re operating a standalone Prometheus server, the latest release can be downloaded from the Prometheus website. For additional insights, delve into the complete release notes for version 2.26.0. Should you encounter issues with your configuration or have suggestions for improving user experience, please feel free to reach out or report any bugs or enhancement ideas.
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