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configfiles.go
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/
configfiles.go
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/*
* Tencent is pleased to support the open source community by making TKEStack
* available.
*
* Copyright (C) 2012-2019 Tencent. All Rights Reserved.
*
* 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
*
* https://opensource.org/licenses/Apache-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 OF ANY KIND, either express or implied. See the License for the
* specific language governing permissions and limitations under the License.
*/
package configfiles
import (
"fmt"
"k8s.io/apimachinery/pkg/runtime/serializer"
auditconfig "tkestack.io/tke/pkg/audit/apis/config"
auditscheme "tkestack.io/tke/pkg/audit/apis/config/scheme"
"tkestack.io/tke/pkg/audit/config/codec"
utilfs "tkestack.io/tke/pkg/util/filesystem"
)
// Loader loads configuration from a storage layer
type Loader interface {
// Load loads and returns the AuditConfiguration from the storage layer, or an error if a configuration could not be loaded
Load() (*auditconfig.AuditConfiguration, error)
}
// fsLoader loads configuration from `configDir`
type fsLoader struct {
// fs is the filesystem where the config files exist; can be mocked for testing
fs utilfs.Filesystem
// auditCodecs is the scheme used to decode config files
auditCodecs *serializer.CodecFactory
// auditFile is an absolute path to the file containing a serialized AuditConfiguration
auditFile string
}
// NewFsLoader returns a Loader that loads a AuditConfiguration from the `auditFile`
func NewFsLoader(fs utilfs.Filesystem, auditFile string) (Loader, error) {
_, auditCodecs, err := auditscheme.NewSchemeAndCodecs()
if err != nil {
return nil, err
}
return &fsLoader{
fs: fs,
auditCodecs: auditCodecs,
auditFile: auditFile,
}, nil
}
func (loader *fsLoader) Load() (*auditconfig.AuditConfiguration, error) {
data, err := loader.fs.ReadFile(loader.auditFile)
if err != nil {
return nil, fmt.Errorf("failed to read kubelet config file %q, error: %v", loader.auditFile, err)
}
// no configuration is an error, some parameters are required
if len(data) == 0 {
return nil, fmt.Errorf("kubelet config file %q was empty", loader.auditFile)
}
kc, err := codec.DecodeAuditConfiguration(loader.auditCodecs, data)
if err != nil {
return nil, err
}
// make all paths absolute
return kc, nil
}