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/api/v1/config.go

@@ -0,0 +1,88 @@
+/*
+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 v1
+
+import (
+	"fmt"
+	"net/url"
+	"strings"
+
+	"k8s.io/apimachinery/pkg/util/validation/field"
+	"k8s.io/component-base/featuregate"
+)
+
+var (
+	maxSamplingRatePerMillion = int32(1000000)
+)
+
+// ValidateTracingConfiguration validates the tracing configuration
+func ValidateTracingConfiguration(traceConfig *TracingConfiguration, featureGate featuregate.FeatureGate, fldPath *field.Path) field.ErrorList {
+	allErrs := field.ErrorList{}
+	if traceConfig == nil {
+		return allErrs
+	}
+	if traceConfig.SamplingRatePerMillion != nil {
+		allErrs = append(allErrs, validateSamplingRate(*traceConfig.SamplingRatePerMillion, fldPath.Child("samplingRatePerMillion"))...)
+	}
+	if traceConfig.Endpoint != nil {
+		allErrs = append(allErrs, validateEndpoint(*traceConfig.Endpoint, fldPath.Child("endpoint"))...)
+	}
+	return allErrs
+}
+
+func validateSamplingRate(rate int32, fldPath *field.Path) field.ErrorList {
+	errs := field.ErrorList{}
+	if rate < 0 {
+		errs = append(errs, field.Invalid(
+			fldPath, rate,
+			"sampling rate must be positive",
+		))
+	}
+	if rate > maxSamplingRatePerMillion {
+		errs = append(errs, field.Invalid(
+			fldPath, rate,
+			"sampling rate per million must be less than or equal to one million",
+		))
+	}
+	return errs
+}
+
+func validateEndpoint(endpoint string, fldPath *field.Path) field.ErrorList {
+	errs := field.ErrorList{}
+	if !strings.Contains(endpoint, "//") {
+		endpoint = "dns://" + endpoint
+	}
+	url, err := url.Parse(endpoint)
+	if err != nil {
+		errs = append(errs, field.Invalid(
+			fldPath, endpoint,
+			err.Error(),
+		))
+		return errs
+	}
+	switch url.Scheme {
+	case "dns":
+	case "unix":
+	case "unix-abstract":
+	default:
+		errs = append(errs, field.Invalid(
+			fldPath, endpoint,
+			fmt.Sprintf("unsupported scheme: %v.  Options are none, dns, unix, or unix-abstract.  See https://github.com/grpc/grpc/blob/master/doc/naming.md", url.Scheme),
+		))
+	}
+	return errs
+}