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e204d863a5
* Update Kubernetes to v1.22.1 * Update dependent modules to track with upstream Signed-off-by: Brad Davidson <brad.davidson@rancher.com>
120 lines
3.4 KiB
Go
120 lines
3.4 KiB
Go
/*
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Copyright 2021 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package tracing
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import (
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"fmt"
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"io/ioutil"
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"net/url"
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"strings"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/apimachinery/pkg/runtime/serializer"
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"k8s.io/apimachinery/pkg/util/validation/field"
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"k8s.io/apiserver/pkg/apis/apiserver"
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"k8s.io/apiserver/pkg/apis/apiserver/install"
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)
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const (
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maxSamplingRatePerMillion = 1000000
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)
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var (
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cfgScheme = runtime.NewScheme()
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codecs = serializer.NewCodecFactory(cfgScheme)
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)
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func init() {
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install.Install(cfgScheme)
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}
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// ReadTracingConfiguration reads the tracing configuration from a file
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func ReadTracingConfiguration(configFilePath string) (*apiserver.TracingConfiguration, error) {
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if configFilePath == "" {
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return nil, fmt.Errorf("tracing config file was empty")
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}
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data, err := ioutil.ReadFile(configFilePath)
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if err != nil {
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return nil, fmt.Errorf("unable to read tracing configuration from %q: %v", configFilePath, err)
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}
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internalConfig := &apiserver.TracingConfiguration{}
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// this handles json/yaml/whatever, and decodes all registered version to the internal version
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if err := runtime.DecodeInto(codecs.UniversalDecoder(), data, internalConfig); err != nil {
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return nil, fmt.Errorf("unable to decode tracing configuration data: %v", err)
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}
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return internalConfig, nil
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}
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// ValidateTracingConfiguration validates the tracing configuration
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func ValidateTracingConfiguration(config *apiserver.TracingConfiguration) field.ErrorList {
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allErrs := field.ErrorList{}
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if config == nil {
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// Tracing is disabled
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return allErrs
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}
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if config.SamplingRatePerMillion != nil {
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allErrs = append(allErrs, validateSamplingRate(*config.SamplingRatePerMillion, field.NewPath("samplingRatePerMillion"))...)
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}
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if config.Endpoint != nil {
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allErrs = append(allErrs, validateEndpoint(*config.Endpoint, field.NewPath("endpoint"))...)
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}
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return allErrs
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}
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func validateSamplingRate(rate int32, fldPath *field.Path) field.ErrorList {
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errs := field.ErrorList{}
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if rate < 0 {
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errs = append(errs, field.Invalid(
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fldPath, rate,
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"sampling rate must be positive",
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))
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}
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if rate > maxSamplingRatePerMillion {
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errs = append(errs, field.Invalid(
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fldPath, rate,
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"sampling rate per million must be less than or equal to one million",
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))
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}
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return errs
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}
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func validateEndpoint(endpoint string, fldPath *field.Path) field.ErrorList {
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errs := field.ErrorList{}
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if !strings.Contains(endpoint, "//") {
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endpoint = "dns://" + endpoint
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}
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url, err := url.Parse(endpoint)
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if err != nil {
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errs = append(errs, field.Invalid(
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fldPath, endpoint,
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err.Error(),
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))
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return errs
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}
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switch url.Scheme {
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case "dns":
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case "unix":
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case "unix-abstract":
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default:
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errs = append(errs, field.Invalid(
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fldPath, endpoint,
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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),
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))
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}
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return errs
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}
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