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I want to get some X-Ray traces of my Lambda function. From reading the documentation it seems I can just enable active tracing in the configuration and it should record it automatically without any new code deploys correct?

Only if I want custom sub segments would I explicitly make some X-Ray calls in the lambda function?

MikanPotatos
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1 Answers1

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Yes, you are correct, with the following caveats:

  1. You need to check the Enable Active Tracing checkbox in the Lambda console. From your function in the console > Configuration tab > Advanced dropdown/section > check Enable Active Tracing checkbox > Save.

  2. When you follow the step above, the console will advise that the IAM policy that the function executes under will be modified. If you're using a role created by the console when creating a function, you may need to modify the role manually. Either create a new policy and attach it to the role, create an inline policy attachment, or edit the existing policy for the role with a SID like this (this is an example - use globs in IAM policies with great care):

    {
    "Sid": "AllowXRay",
    "Resource": "*",
    "Action": [
        "xray:PutTraceSegments",
        "xray:PutTelemetryRecords"
    ],
    "Effect": "Allow"
}

After following these steps, I was able to see full traces of my function in the XRay console.

geekmuse
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  • Adding these worked. Unfo, the incoming JSON is not logged...add to the one Statement object already there. "xray:PutTraceSegments", "xray:PutTelemetryRecords" – codeslapper Jun 21 '17 at 20:22