X-Ray

  • App Insights: Collects application data for viewing, filtering, and gaining insights about requests and responses.

  • Downstream. View calls to downstream AWS resources and other microservicers/APIs or databases

  • Traces. Receives traces from applications

  • Multiple Options. Can add tracing headers, send trace data, or run the X-Ray deamon

Key concepts:

  • Segments: Data containing resource names, request details, and other information

  • Subsegments: Segments providing more granular timing information and details

  • Service graph: Graphical representation of interacting services in requests

  • Traces: Trace ID tracks paths of requests and traces collect all segments in a request.

  • Tracing headers: Extra HTTP headers containing sampling decisions and trace ID

  • Tracing header containing added information is named X-Amzn-Trace-Id

AWS X-Ray Deamon

AWS software application that listens on UDP port 2000. It collects raw segment data and sends it to the AWS X-Ray API.

When the deamon is running, it works along with the AWS X-Ray SDKs

The Deamon can be run on:

  • EC2 instances

  • Amazon ECS

  • AWS Lambda

  • Elastic Beanstalk

  • API Gateway

  • SNS and SQS

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