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To address this issue, you need to ensure that the X-Ray trace context is propagated correctly between the Step Function and the ECS Fargate task. Here are a few steps you can take:
-
Step Function Configuration:
- Make sure that your Step Function is configured to pass the X-Ray trace header (
X-Amzn-Trace-Id
) to the ECS Fargate task. You can do this by enablingTracing
in the Step Function state machine and settingPassResourceIdsInResponse
totrue
.
- Make sure that your Step Function is configured to pass the X-Ray trace header (
-
ECS Task Definition:
- In your ECS Task Definition, ensure that the container definition includes the X-Ray daemon sidecar container.
- Configure your application container to pass the X-Ray trace header to the X-Ray daemon sidecar container. This can typically be done by setting the
AWS_XRAY_DAEMON_ADDRESS
environment variable to the IP address and port of the X-Ray daemon sidecar container.
-
Application Code:
- In your application code (Python in this case), you need to correctly retrieve the X-Ray trace header from the incoming request and use it to create a new subsegment or segment.
- Instead of using the trace ID from
SdkHttpMetadata.AllHttpHeaders.X-Amzn-Trace-Id[0]
, you should use the trace header from the incoming request headers. This header should be automatically passed by ECS to your application container. - Use the AWS X-Ray SDK to create a new segment or subsegment using the trace header, and capture the necessary information within your application code.
By following these steps, you should be able to see the complete end-to-end trace in the X-Ray trace map, including the Step Function, ECS Fargate task, and any other services your application interacts with.
Let me know if this is helpful.
answered 15 days ago
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Thanks for the fast answer!
and from the ECS X-Ray Daemon docs, when in awsvpc network mode you don't need to specify the AWS_XRAY_DAEMON_ADDRESS variable : https://docs.aws.amazon.com/xray/latest/devguide/xray-daemon-ecs.html#:~:text=If%20you%20run%20your%20cluster%20in%20the%20private%20subnet%20of%20a%20VPC%2C%20you%20can%20use%20the%20awsvpc%20network%20mode%20to%20attach%20an%20elastic%20network%20interface%20(ENI)%20to%20your%20containers.%20This%20enables%20you%20to%20avoid%20using%20links.%20Omit%20the%20host%20port%20in%20the%20port%20mappings%2C%20the%20link%2C%20and%20the%20AWS_XRAY_DAEMON_ADDRESS%20environment%20variable.