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Copy pathconfig.go
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234 lines (199 loc) · 6.22 KB
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/*
* MinIO Cloud Storage, (C) 2018 MinIO, Inc.
*
* 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 cmd
import (
"bytes"
"context"
"encoding/json"
"path"
"sort"
"strings"
"unicode/utf8"
jsoniter "github.com/json-iterator/go"
"github.com/minio/minio/cmd/config"
"github.com/minio/minio/pkg/madmin"
)
const (
minioConfigPrefix = "config"
kvPrefix = ".kv"
// Captures all the previous SetKV operations and allows rollback.
minioConfigHistoryPrefix = minioConfigPrefix + "/history"
// MinIO configuration file.
minioConfigFile = "config.json"
)
func listServerConfigHistory(ctx context.Context, objAPI ObjectLayer, withData bool, count int) (
[]madmin.ConfigHistoryEntry, error) {
var configHistory []madmin.ConfigHistoryEntry
// List all kvs
marker := ""
for {
res, err := objAPI.ListObjects(ctx, minioMetaBucket, minioConfigHistoryPrefix, marker, "", maxObjectList)
if err != nil {
return nil, err
}
for _, obj := range res.Objects {
cfgEntry := madmin.ConfigHistoryEntry{
RestoreID: strings.TrimSuffix(path.Base(obj.Name), kvPrefix),
CreateTime: obj.ModTime, // ModTime is createTime for config history entries.
}
if withData {
data, err := readConfig(ctx, objAPI, obj.Name)
if err != nil {
return nil, err
}
if globalConfigEncrypted && !utf8.Valid(data) {
data, err = madmin.DecryptData(globalActiveCred.String(), bytes.NewReader(data))
if err != nil {
return nil, err
}
}
cfgEntry.Data = string(data)
}
configHistory = append(configHistory, cfgEntry)
count--
if count == 0 {
break
}
}
if !res.IsTruncated {
// We are done here
break
}
marker = res.NextMarker
}
sort.Slice(configHistory, func(i, j int) bool {
return configHistory[i].CreateTime.Before(configHistory[j].CreateTime)
})
return configHistory, nil
}
func delServerConfigHistory(ctx context.Context, objAPI ObjectLayer, uuidKV string) error {
historyFile := pathJoin(minioConfigHistoryPrefix, uuidKV+kvPrefix)
_, err := objAPI.DeleteObject(ctx, minioMetaBucket, historyFile, ObjectOptions{})
return err
}
func readServerConfigHistory(ctx context.Context, objAPI ObjectLayer, uuidKV string) ([]byte, error) {
historyFile := pathJoin(minioConfigHistoryPrefix, uuidKV+kvPrefix)
data, err := readConfig(ctx, objAPI, historyFile)
if err != nil {
return nil, err
}
if globalConfigEncrypted && !utf8.Valid(data) {
data, err = madmin.DecryptData(globalActiveCred.String(), bytes.NewReader(data))
}
return data, err
}
func saveServerConfigHistory(ctx context.Context, objAPI ObjectLayer, kv []byte) error {
uuidKV := mustGetUUID() + kvPrefix
historyFile := pathJoin(minioConfigHistoryPrefix, uuidKV)
var err error
if globalConfigEncrypted {
kv, err = madmin.EncryptData(globalActiveCred.String(), kv)
if err != nil {
return err
}
}
// Save the new config KV settings into the history path.
return saveConfig(ctx, objAPI, historyFile, kv)
}
func saveServerConfig(ctx context.Context, objAPI ObjectLayer, config interface{}) error {
data, err := json.Marshal(config)
if err != nil {
return err
}
if globalConfigEncrypted {
data, err = madmin.EncryptData(globalActiveCred.String(), data)
if err != nil {
return err
}
}
configFile := path.Join(minioConfigPrefix, minioConfigFile)
// Save the new config in the std config path
return saveConfig(ctx, objAPI, configFile, data)
}
func readServerConfig(ctx context.Context, objAPI ObjectLayer) (config.Config, error) {
configFile := path.Join(minioConfigPrefix, minioConfigFile)
configData, err := readConfig(ctx, objAPI, configFile)
if err != nil {
// Config not found for some reason, allow things to continue
// by initializing a new fresh config in safe mode.
if err == errConfigNotFound && newObjectLayerFn() == nil {
return newServerConfig(), nil
}
return nil, err
}
if globalConfigEncrypted && !utf8.Valid(configData) {
configData, err = madmin.DecryptData(globalActiveCred.String(), bytes.NewReader(configData))
if err != nil {
if err == madmin.ErrMaliciousData {
return nil, config.ErrInvalidCredentialsBackendEncrypted(nil)
}
return nil, err
}
}
var srvCfg = config.New()
var json = jsoniter.ConfigCompatibleWithStandardLibrary
if err = json.Unmarshal(configData, &srvCfg); err != nil {
return nil, err
}
// Add any missing entries
return srvCfg.Merge(), nil
}
// ConfigSys - config system.
type ConfigSys struct{}
// Load - load config.json.
func (sys *ConfigSys) Load(objAPI ObjectLayer) error {
return sys.Init(objAPI)
}
// Init - initializes config system from config.json.
func (sys *ConfigSys) Init(objAPI ObjectLayer) error {
if objAPI == nil {
return errInvalidArgument
}
return initConfig(objAPI)
}
// NewConfigSys - creates new config system object.
func NewConfigSys() *ConfigSys {
return &ConfigSys{}
}
// Initialize and load config from remote etcd or local config directory
func initConfig(objAPI ObjectLayer) error {
if objAPI == nil {
return errServerNotInitialized
}
if isFile(getConfigFile()) {
if err := migrateConfig(); err != nil {
return err
}
}
// Migrates ${HOME}/.minio/config.json or config.json.deprecated
// to '<export_path>/.minio.sys/config/config.json'
// ignore if the file doesn't exist.
// If etcd is set then migrates /config/config.json
// to '<export_path>/.minio.sys/config/config.json'
if err := migrateConfigToMinioSys(objAPI); err != nil {
return err
}
// Migrates backend '<export_path>/.minio.sys/config/config.json' to latest version.
if err := migrateMinioSysConfig(objAPI); err != nil {
return err
}
// Migrates backend '<export_path>/.minio.sys/config/config.json' to
// latest config format.
if err := migrateMinioSysConfigToKV(objAPI); err != nil {
return err
}
return loadConfig(objAPI)
}