mirror of https://github.com/k3s-io/k3s
79 lines
2.1 KiB
Go
79 lines
2.1 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 load
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import (
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"fmt"
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"io"
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"os"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/pod-security-admission/admission/api"
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"k8s.io/pod-security-admission/admission/api/scheme"
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apiv1alpha1 "k8s.io/pod-security-admission/admission/api/v1alpha1"
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)
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func LoadFromFile(file string) (*api.PodSecurityConfiguration, error) {
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if len(file) == 0 {
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// no file specified, use default config
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return LoadFromData(nil)
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}
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// read from file
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data, err := os.ReadFile(file)
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if err != nil {
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return nil, err
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}
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return LoadFromData(data)
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}
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func LoadFromReader(reader io.Reader) (*api.PodSecurityConfiguration, error) {
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if reader == nil {
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// no reader specified, use default config
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return LoadFromData(nil)
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}
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data, err := io.ReadAll(reader)
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if err != nil {
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return nil, err
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}
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return LoadFromData(data)
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}
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func LoadFromData(data []byte) (*api.PodSecurityConfiguration, error) {
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if len(data) == 0 {
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// no config provided, return default
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externalConfig := &apiv1alpha1.PodSecurityConfiguration{}
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scheme.Scheme.Default(externalConfig)
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internalConfig := &api.PodSecurityConfiguration{}
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if err := scheme.Scheme.Convert(externalConfig, internalConfig, nil); err != nil {
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return nil, err
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}
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return internalConfig, nil
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}
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decodedObj, err := runtime.Decode(scheme.Codecs.UniversalDecoder(), data)
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if err != nil {
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return nil, err
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}
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configuration, ok := decodedObj.(*api.PodSecurityConfiguration)
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if !ok {
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return nil, fmt.Errorf("expected PodSecurityConfiguration, got %T", decodedObj)
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}
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return configuration, nil
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}
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