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loader.go
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loader.go
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// Copyright (c) 2019 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 loader
import (
"fmt"
"os"
"github.com/gardener/gardener/pkg/scheduler/apis/config"
"github.com/gardener/gardener/pkg/scheduler/apis/config/install"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/runtime/serializer"
)
var scheme *runtime.Scheme
func init() {
scheme = runtime.NewScheme()
install.Install(scheme)
}
// LoadFromFile takes a filename and de-serializes the contents into SchedulerConfiguration object.
func LoadFromFile(filename string) (*config.SchedulerConfiguration, error) {
bytes, err := os.ReadFile(filename)
if err != nil {
return nil, err
}
return Load(bytes)
}
// Load takes a byte slice and de-serializes the contents into SchedulerConfiguration object.
// Encapsulates de-serialization without assuming the source is a file.
func Load(data []byte) (*config.SchedulerConfiguration, error) {
cfg := &config.SchedulerConfiguration{}
if len(data) == 0 {
return cfg, nil
}
configObj, gvk, err := serializer.NewCodecFactory(scheme).UniversalDecoder().Decode(data, nil, cfg)
if err != nil {
return nil, err
}
config, ok := configObj.(*config.SchedulerConfiguration)
if !ok {
return nil, fmt.Errorf("got unexpected config type: %v", gvk)
}
return config, nil
}