Telemetry

• Requirements for telemetry
• Envoy sidecars (proxy)
• Control plane running
• No Istio configuration is needed (VS, DR, GW)

Kiali

• App graph: Squares represent a component with label app
• Versioned app graph: App graph but subdivided into more labels, for example label version
• Service graph: Connection between services
• Workload graph: Workloads are analog to a deployment

Jaeger

• Distributed tracing framework (implements OpenTracing)
• Track a single request

• It runs at the proxy level. Istio has native support for Jaeger and Zipckin

• Trace: Gather of all hoops performed by a request. It's broken down into spans

• Span: Each individual route

x-request-id

• Must be implemented into the code for the distributed tracing to work properly

• x is HTML standards was used to point out a experimental header. Extra headers

• Store the x-request-id from request received in a variable

• Send back the x-request-id in the header to outgoing requests