apiVersion: release-notes/v2
kind: feature
area: telemetry
issue:
  - 50808
releaseNotes:
  - |

apiVersion: install.istio.io/v1alpha1
kind: IstioOperator
spec:
  profile: empty
  values:
    global:
      proxy:
        tracer: none
  components:
    pilot:

apiVersion: release-notes/v2
kind: feature
area: telemetry

issue:
- 42080
releaseNotes:
- |

apiVersion: release-notes/v2
kind: bug-fix
area: telemetry
issue:
  - 27911
releaseNotes:
  - |

					c.Tracing = &meshconfig.Tracing{
						Tracer: &meshconfig.Tracing_Zipkin_{
							Zipkin: &meshconfig.Tracing_Zipkin{
								Address: "$(HOST_IP):9411",
							},
						},
					}
				},
			),
			isValid: true,
		},
		{
			name: "zipkin config invalid",
			in: modify(valid,
				func(c *meshconfig.ProxyConfig) {
					c.Tracing = &meshconfig.Tracing{
						Tracer: &meshconfig.Tracing_Zipkin_{

	"istio.io/istio/pkg/log"
	"istio.io/istio/pkg/wellknown"
)

const (
	envoyDatadog       = "envoy.tracers.datadog"
	envoyOpenTelemetry = "envoy.tracers.opentelemetry"
	envoySkywalking    = "envoy.tracers.skywalking"
	envoyZipkin        = "envoy.tracers.zipkin"
)

// this is used for testing. it should not be changed in regular code.
var clusterLookupFn = model.LookupCluster

	}

	if tracer := config.GetTracing().GetLightstep(); tracer != nil {
		if err := ValidateLightstepCollector(tracer); err != nil {
			errs = multierror.Append(errs, multierror.Prefix(err, "invalid lightstep config:"))
		}
	}

	if tracer := config.GetTracing().GetZipkin(); tracer != nil {
		if err := ValidateZipkinCollector(tracer); err != nil {

      #        clientCertificate: # example: /etc/istio/tracer/cert-chain.pem
      #        privateKey:        # example: /etc/istio/tracer/key.pem
      #        caCertificates:    # example: /etc/istio/tracer/root-cert.pem
      #        sni:               # example: tracer.somedomain
      #        subjectAltNames: []

	}
	tracer := tracerProvider.Tracer(instrumentationScope)
	im := &realImageGCManager{
		runtime:       runtime,
		policy:        policy,
		imageRecords:  make(map[string]*imageRecord),
		statsProvider: statsProvider,
		recorder:      recorder,
		nodeRef:       nodeRef,
		tracer:        tracer,
	}

	return im, nil
}

          "cpu": "100m",
          "memory": "128Mi"
        }
      },
      "startupProbe": {
        "enabled": true,
        "failureThreshold": 600
      },
      "statusPort": 15020,
      "tracer": "none"
    },
    "proxy_init": {
      "image": "proxyv2"
    },
    "remotePilotAddress": "",
    "sds": {
      "token": {
        "aud": "istio-ca"
      }
    },
    "sts": {