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webhookbase.go
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webhookbase.go
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/*
Copyright 2022 The Katalyst 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 (
"fmt"
"k8s.io/apimachinery/pkg/util/errors"
apiserveroptions "k8s.io/apiserver/pkg/server/options"
cliflag "k8s.io/component-base/cli/flag"
webhookconfig "github.com/kubewharf/katalyst-core/pkg/config/webhook"
)
// GenericWebhookOptions holds the configurations for webhook based configurations.
type GenericWebhookOptions struct {
Webhooks []string
LabelSelector string
ServerPort string
DynamicGVResources []string
SecureServing *apiserveroptions.SecureServingOptions
}
// NewGenericWebhookOptions creates a new Options with a default config.
func NewGenericWebhookOptions() *GenericWebhookOptions {
o := &GenericWebhookOptions{
SecureServing: apiserveroptions.NewSecureServingOptions(),
}
o.SecureServing.ServerCert.PairName = "katalyst-webhook"
return o
}
// AddFlags adds flags to the specified FlagSet.
func (o *GenericWebhookOptions) AddFlags(fss *cliflag.NamedFlagSets) {
fs := fss.FlagSet("webhook")
fs.StringSliceVar(&o.Webhooks, "webhooks", o.Webhooks, fmt.Sprintf(""+
"A list of webhooks to enable. '*' enables all on-by-default webhooks, 'foo' enables the webhook "+
"named 'foo', '-foo' disables the webhook named 'foo'"))
fs.StringVar(&o.ServerPort, "server-port", o.ServerPort, fmt.Sprintf(""+
"HTTP port that webhooks will be listening on."))
fs.StringVar(&o.LabelSelector, "label-selector", o.LabelSelector, fmt.Sprintf(""+
"A selector to restrict the list of returned objects by their labels. this selector is used in informer factory."))
fs.StringSliceVar(&o.DynamicGVResources, "dynamic-resources", o.DynamicGVResources, fmt.Sprintf(""+
"A list of workloads to be list and watched. "+
"DynamicGVResources should be in the format of `resource.version.group.com` like 'deployments.v1.apps'."))
o.SecureServing.AddFlags(fs)
}
// ApplyTo fills up config with options
func (o *GenericWebhookOptions) ApplyTo(c *webhookconfig.GenericWebhookConfiguration) error {
c.Webhooks = o.Webhooks
c.ServerPort = o.ServerPort
c.LabelSelector = o.LabelSelector
c.DynamicGVResources = o.DynamicGVResources
if errList := o.SecureServing.Validate(); len(errList) > 0 {
return errors.NewAggregate(errList)
}
err := o.SecureServing.ApplyTo(&c.SecureServing)
if err != nil {
return err
}
return nil
}
func (o *GenericWebhookOptions) Config() (*webhookconfig.GenericWebhookConfiguration, error) {
c := webhookconfig.NewGenericWebhookConfiguration()
if err := o.ApplyTo(c); err != nil {
return nil, err
}
return c, nil
}