This ticket is based on SRVKS-249. We would like to have a doc how to configure Jaeger in KnativeServing CR.

The full docs is here but Step-1 and Step-2 are just Jaeger's installation/setup so we just need to write Step-3 in the docs.

— DRAFT —

Enable tracing on KnativeServing

$ oc edit ks -n knative-serving knative-serving

    tracing:
      sample-rate: "0.1"
      backend: zipkin
      zipkin-endpoint: http://jaeger-collector.<JAEGER_NAMESPACE>.svc.cluster.local:9411/api/v2/spans

• The backend must be "zipkin".
• The zipkin-endpoint must point to your `jaeger-collector` service endpoint.

— DRAFT —