kubernetes options 源码

  • 2022-09-18
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kubernetes options 代码

文件路径:/staging/src/k8s.io/pod-security-admission/cmd/webhook/server/options/options.go

/*
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 options

import (
	"github.com/spf13/pflag"

	apiserveroptions "k8s.io/apiserver/pkg/server/options"
)

const (
	DefaultPort           = 8443
	DefaultInsecurePort   = 8080
	DefaultClientQPSLimit = 20
	DefaultClientQPSBurst = 50
)

// Options has all the params needed to run a PodSecurity webhook.
type Options struct {
	// Kubeconfig is the file path to the KubeConfig file to use. Only for out-of-cluster configuration.
	Kubeconfig string

	// Config is the file path to the PodSecurity configuration file.
	Config string

	ClientQPSLimit float32
	ClientQPSBurst int

	SecureServing   apiserveroptions.SecureServingOptions
	InsecureServing apiserveroptions.DeprecatedInsecureServingOptions
}

func NewOptions() *Options {
	secureServing := apiserveroptions.NewSecureServingOptions()
	secureServing.ServerCert.PairName = "webhook"
	o := &Options{
		SecureServing:   *secureServing,
		InsecureServing: apiserveroptions.DeprecatedInsecureServingOptions{},
		ClientQPSLimit:  DefaultClientQPSLimit,
		ClientQPSBurst:  DefaultClientQPSBurst,
	}
	o.SecureServing.BindPort = DefaultPort
	o.InsecureServing.BindPort = DefaultInsecurePort
	return o
}

func (o *Options) AddFlags(fs *pflag.FlagSet) {
	fs.StringVar(&o.Kubeconfig, "kubeconfig", o.Kubeconfig, "Path to the kubeconfig file specifying how to connect to the API server. Leave empty to use an in-cluster config.")
	fs.StringVar(&o.Config, "config", o.Config, "The path to the PodSecurity configuration file.")
	fs.Float32Var(&o.ClientQPSLimit, "client-qps-limit", o.ClientQPSLimit, "Client QPS limit for throttling requests to the API server.")
	fs.IntVar(&o.ClientQPSBurst, "client-qps-burst", o.ClientQPSBurst, "Client QPS burst limit for throttling requests to the API server.")

	o.SecureServing.AddFlags(fs)
	o.InsecureServing.AddFlags(fs)
}

// Validate validates all the required options.
func (o *Options) Validate() []error {
	var errs []error

	errs = append(errs, o.SecureServing.Validate()...)
	errs = append(errs, o.InsecureServing.Validate()...)

	return errs
}

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