rebase: update kubernetes to v1.25.0

update kubernetes to latest v1.25.0
release.

Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>

vendor/k8s.io/component-base/tracing/utils.go

@@ -0,0 +1,108 @@
+/*
+Copyright 2021 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package tracing
+
+import (
+	"context"
+	"net/http"
+
+	"go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp"
+	"go.opentelemetry.io/otel/exporters/otlp"
+	"go.opentelemetry.io/otel/exporters/otlp/otlpgrpc"
+	"go.opentelemetry.io/otel/propagation"
+	"go.opentelemetry.io/otel/sdk/resource"
+	sdktrace "go.opentelemetry.io/otel/sdk/trace"
+	oteltrace "go.opentelemetry.io/otel/trace"
+
+	"k8s.io/client-go/transport"
+	"k8s.io/component-base/tracing/api/v1"
+)
+
+// NewProvider creates a TracerProvider in a component, and enforces recommended tracing behavior
+func NewProvider(ctx context.Context,
+	tracingConfig *v1.TracingConfiguration,
+	addedOpts []otlpgrpc.Option,
+	resourceOpts []resource.Option,
+) (oteltrace.TracerProvider, error) {
+	if tracingConfig == nil {
+		return oteltrace.NewNoopTracerProvider(), nil
+	}
+	opts := append([]otlpgrpc.Option{}, addedOpts...)
+	if tracingConfig.Endpoint != nil {
+		opts = append(opts, otlpgrpc.WithEndpoint(*tracingConfig.Endpoint))
+	}
+	opts = append(opts, otlpgrpc.WithInsecure())
+	driver := otlpgrpc.NewDriver(opts...)
+	exporter, err := otlp.NewExporter(ctx, driver)
+	if err != nil {
+		return nil, err
+	}
+	res, err := resource.New(ctx, resourceOpts...)
+	if err != nil {
+		return nil, err
+	}
+
+	// sampler respects parent span's sampling rate or
+	// otherwise never samples.
+	sampler := sdktrace.NeverSample()
+	// Or, emit spans for a fraction of transactions
+	if tracingConfig.SamplingRatePerMillion != nil && *tracingConfig.SamplingRatePerMillion > 0 {
+		sampler = sdktrace.TraceIDRatioBased(float64(*tracingConfig.SamplingRatePerMillion) / float64(1000000))
+	}
+	// batch span processor to aggregate spans before export.
+	bsp := sdktrace.NewBatchSpanProcessor(exporter)
+	tp := sdktrace.NewTracerProvider(
+		sdktrace.WithSampler(sdktrace.ParentBased(sampler)),
+		sdktrace.WithSpanProcessor(bsp),
+		sdktrace.WithResource(res),
+	)
+	return tp, nil
+}
+
+// WithTracing adds tracing to requests if the incoming request is sampled
+func WithTracing(handler http.Handler, tp oteltrace.TracerProvider, serviceName string) http.Handler {
+	opts := []otelhttp.Option{
+		otelhttp.WithPropagators(Propagators()),
+		otelhttp.WithTracerProvider(tp),
+	}
+	// With Noop TracerProvider, the otelhttp still handles context propagation.
+	// See https://github.com/open-telemetry/opentelemetry-go/tree/main/example/passthrough
+	return otelhttp.NewHandler(handler, serviceName, opts...)
+}
+
+// WrapperFor can be used to add tracing to a *rest.Config.
+// Example usage:
+// tp := NewProvider(...)
+// config, _ := rest.InClusterConfig()
+// config.Wrap(WrapperFor(&tp))
+// kubeclient, _ := clientset.NewForConfig(config)
+func WrapperFor(tp oteltrace.TracerProvider) transport.WrapperFunc {
+	return func(rt http.RoundTripper) http.RoundTripper {
+		opts := []otelhttp.Option{
+			otelhttp.WithPropagators(Propagators()),
+			otelhttp.WithTracerProvider(tp),
+		}
+		// With Noop TracerProvider, the otelhttp still handles context propagation.
+		// See https://github.com/open-telemetry/opentelemetry-go/tree/main/example/passthrough
+		return otelhttp.NewTransport(rt, opts...)
+	}
+}
+
+// Propagators returns the recommended set of propagators.
+func Propagators() propagation.TextMapPropagator {
+	return propagation.NewCompositeTextMapPropagator(propagation.TraceContext{}, propagation.Baggage{})
+}