AWS X-Ray

1. What is X-Ray

   Distributed tracing for applications.

2. Concepts

   Traces, segments, subsegments, annotations and metadata.

3. Instrumenting your application

   Adding tracing with SDKs and OpenTelemetry.

4. X-Ray daemon

   Relaying trace data to the X-Ray service.

5. Integrating with AWS services

   Tracing Lambda, API Gateway, ECS and other services.

6. Sampling

   Controlling the volume of traces recorded.

7. Trace map and traces

   Viewing service maps and analyzing traces.

8. Transaction Search

   Indexing and searching spans.

9. Security

   IAM permissions, encryption with KMS and data protection for traces.

Each section links to the official page. Titles and summaries by Extra Credit; the docs belong to their authors.