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config.go
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config.go
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// Copyright 2020 SAP SE or an SAP affiliate company. All rights reserved. This file is licensed under the Apache Software License, v. 2 except as noted otherwise in the LICENSE file
//
// 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 dnsrewriting
import (
"fmt"
"io"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/runtime/serializer"
"github.com/gardener/gardener/plugin/pkg/shoot/dnsrewriting/apis/shootdnsrewriting"
"github.com/gardener/gardener/plugin/pkg/shoot/dnsrewriting/apis/shootdnsrewriting/install"
"github.com/gardener/gardener/plugin/pkg/shoot/dnsrewriting/apis/shootdnsrewriting/v1alpha1"
)
var (
scheme = runtime.NewScheme()
codecs = serializer.NewCodecFactory(scheme)
)
func init() {
install.Install(scheme)
}
// LoadConfiguration loads the provided configuration.
func LoadConfiguration(config io.Reader) (*shootdnsrewriting.Configuration, error) {
// if no config is provided, return a default Configuration
if config == nil {
externalConfig := &v1alpha1.Configuration{}
scheme.Default(externalConfig)
internalConfig := &shootdnsrewriting.Configuration{}
if err := scheme.Convert(externalConfig, internalConfig, nil); err != nil {
return nil, err
}
return internalConfig, nil
}
data, err := io.ReadAll(config)
if err != nil {
return nil, err
}
decodedObj, err := runtime.Decode(codecs.UniversalDecoder(), data)
if err != nil {
return nil, err
}
cfg, ok := decodedObj.(*shootdnsrewriting.Configuration)
if !ok {
return nil, fmt.Errorf("unexpected type: %T", decodedObj)
}
return cfg, nil
}