[WIP] mackerel-lambda-agent

A monitoring agent of Mackerel for AWS Lambda.

This is AWS Lambda Extensions provided as AWS Lambda Layers.

NOTE: This is experimental and not suitable for production use.

$ sam build
$ sam deploy --guided

Set up the layer for Lambda functions which you want to monitor on Mackerel.
Configure Mackerel API key as MACKEREL_API_KEY in the Lambda functions environment variables.

Note

AWS Lambda Extensions runs on the same execution environment as Lambda functions. So it can impact function performance.
Following are overhead estimations;
- CPU overhead : ? (Should not so heavy)
- Memory overhead : ~70MB (Working on decreasing)
- Duration time overhead: ~1msec