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Migrate config.json from config-dir to backend
This PR is the first set of changes to move the config to the backend, the changes use the existing `config.json` allows it to be migrated such that we can save it in on backend disks. In future releases, we will slowly migrate out of the current architecture. Fixes minio#6182
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,281 @@ | ||
| /* | ||
| * 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" | ||
| "errors" | ||
| "io/ioutil" | ||
| "path" | ||
|
|
||
| "github.com/minio/minio/cmd/logger" | ||
| "github.com/minio/minio/pkg/hash" | ||
| "github.com/minio/minio/pkg/quick" | ||
| ) | ||
|
|
||
| const ( | ||
| minioConfigPrefix = "config" | ||
|
|
||
| // Minio configuration file. | ||
| minioConfigFile = "config.json" | ||
| ) | ||
|
|
||
| func saveServerConfig(objAPI ObjectLayer, config *serverConfig) error { | ||
| if err := quick.CheckData(config); err != nil { | ||
| return err | ||
| } | ||
|
|
||
| data, err := json.Marshal(config) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| configFile := path.Join(minioConfigPrefix, minioConfigFile) | ||
| return saveConfig(objAPI, configFile, data) | ||
| } | ||
|
|
||
| func readServerConfig(ctx context.Context, objAPI ObjectLayer) (*serverConfig, error) { | ||
| configFile := path.Join(minioConfigPrefix, minioConfigFile) | ||
| reader, err := readConfig(ctx, objAPI, configFile) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| var config = &serverConfig{} | ||
| d := json.NewDecoder(reader) | ||
| if err = d.Decode(config); err != nil { | ||
| return nil, err | ||
| } | ||
| if err = quick.CheckData(config); err != nil { | ||
| return nil, err | ||
| } | ||
| return config, nil | ||
| } | ||
|
|
||
| func checkServerConfig(ctx context.Context, objAPI ObjectLayer) error { | ||
| configFile := path.Join(minioConfigPrefix, minioConfigFile) | ||
| if _, err := objAPI.GetObjectInfo(ctx, minioMetaBucket, configFile); err != nil { | ||
| if isErrObjectNotFound(err) { | ||
| return errConfigNotFound | ||
| } | ||
| logger.GetReqInfo(ctx).AppendTags("configFile", configFile) | ||
| logger.LogIf(ctx, err) | ||
| return err | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| func saveConfig(objAPI ObjectLayer, configFile string, data []byte) error { | ||
| hashReader, err := hash.NewReader(bytes.NewReader(data), int64(len(data)), "", getSHA256Hash(data)) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| _, err = objAPI.PutObject(context.Background(), minioMetaBucket, configFile, hashReader, nil) | ||
| return err | ||
| } | ||
|
|
||
| var errConfigNotFound = errors.New("config file not found") | ||
|
|
||
| func readConfig(ctx context.Context, objAPI ObjectLayer, configFile string) (*bytes.Buffer, error) { | ||
| var buffer bytes.Buffer | ||
| // Read entire content by setting size to -1 | ||
| if err := objAPI.GetObject(ctx, minioMetaBucket, configFile, 0, -1, &buffer, ""); err != nil { | ||
| // Ignore if err is ObjectNotFound or IncompleteBody when bucket is not configured with notification | ||
| if isErrObjectNotFound(err) || isErrIncompleteBody(err) { | ||
| return nil, errConfigNotFound | ||
| } | ||
|
|
||
| logger.GetReqInfo(ctx).AppendTags("configFile", configFile) | ||
| logger.LogIf(ctx, err) | ||
| return nil, err | ||
| } | ||
|
|
||
| // Return config not found on empty content. | ||
| if buffer.Len() == 0 { | ||
| return nil, errConfigNotFound | ||
| } | ||
|
|
||
| return &buffer, nil | ||
| } | ||
|
|
||
| // ConfigSys - config system. | ||
| type ConfigSys struct{} | ||
|
|
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| // Load - load config.json. | ||
| func (sys *ConfigSys) Load(objAPI ObjectLayer) error { | ||
| if objAPI == nil { | ||
| return errInvalidArgument | ||
| } | ||
| srvCfg, err := readServerConfig(context.Background(), objAPI) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| if err = srvCfg.Validate(); err != nil { | ||
| return err | ||
| } | ||
|
|
||
| // If env is set override the credentials from config file. | ||
| if globalIsEnvCreds { | ||
| srvCfg.SetCredential(globalActiveCred) | ||
| } | ||
|
|
||
| if globalIsEnvBrowser { | ||
| srvCfg.SetBrowser(globalIsBrowserEnabled) | ||
| } | ||
|
|
||
| if globalIsEnvRegion { | ||
| srvCfg.SetRegion(globalServerRegion) | ||
| } | ||
|
|
||
| if globalIsEnvDomainName { | ||
| srvCfg.Domain = globalDomainName | ||
| } | ||
|
|
||
| if globalIsStorageClass { | ||
| srvCfg.SetStorageClass(globalStandardStorageClass, globalRRStorageClass) | ||
| } | ||
|
|
||
| if globalIsDiskCacheEnabled { | ||
| srvCfg.SetCacheConfig(globalCacheDrives, globalCacheExcludes, globalCacheExpiry, globalCacheMaxUse) | ||
| } | ||
|
|
||
| globalServerConfigMu.Lock() | ||
| globalServerConfig = srvCfg | ||
| globalServerConfigMu.Unlock() | ||
|
|
||
| if !globalIsEnvCreds { | ||
| globalActiveCred = globalServerConfig.GetCredential() | ||
| } | ||
| if !globalIsEnvBrowser { | ||
| globalIsBrowserEnabled = globalServerConfig.GetBrowser() | ||
| } | ||
| if !globalIsEnvWORM { | ||
| globalWORMEnabled = globalServerConfig.GetWorm() | ||
| } | ||
| if !globalIsEnvRegion { | ||
| globalServerRegion = globalServerConfig.GetRegion() | ||
| } | ||
| if !globalIsEnvDomainName { | ||
| globalDomainName = globalServerConfig.Domain | ||
| } | ||
| if !globalIsStorageClass { | ||
| globalStandardStorageClass, globalRRStorageClass = globalServerConfig.GetStorageClass() | ||
| } | ||
| if !globalIsDiskCacheEnabled { | ||
| cacheConf := globalServerConfig.GetCacheConfig() | ||
| globalCacheDrives = cacheConf.Drives | ||
| globalCacheExcludes = cacheConf.Exclude | ||
| globalCacheExpiry = cacheConf.Expiry | ||
| globalCacheMaxUse = cacheConf.MaxUse | ||
| } | ||
|
|
||
| return nil | ||
| } | ||
|
|
||
| // Init - initializes config system from config.json. | ||
| func (sys *ConfigSys) Init(objAPI ObjectLayer) error { | ||
| if objAPI == nil { | ||
| return errInvalidArgument | ||
| } | ||
|
|
||
| srvCfg, err := readServerConfig(context.Background(), objAPI) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| if err = srvCfg.Validate(); err != nil { | ||
| return err | ||
| } | ||
|
|
||
| // If env is set override the credentials from config file. | ||
| if globalIsEnvCreds { | ||
| srvCfg.SetCredential(globalActiveCred) | ||
| } | ||
|
|
||
| if globalIsEnvBrowser { | ||
| srvCfg.SetBrowser(globalIsBrowserEnabled) | ||
| } | ||
|
|
||
| if globalIsEnvWORM { | ||
| srvCfg.SetWorm(globalWORMEnabled) | ||
| } | ||
|
|
||
| if globalIsEnvRegion { | ||
| srvCfg.SetRegion(globalServerRegion) | ||
| } | ||
|
|
||
| if globalIsEnvDomainName { | ||
| srvCfg.Domain = globalDomainName | ||
| } | ||
|
|
||
| if globalIsStorageClass { | ||
| srvCfg.SetStorageClass(globalStandardStorageClass, globalRRStorageClass) | ||
| } | ||
|
|
||
| if globalIsDiskCacheEnabled { | ||
| srvCfg.SetCacheConfig(globalCacheDrives, globalCacheExcludes, globalCacheExpiry, globalCacheMaxUse) | ||
| } | ||
|
|
||
| globalServerConfigMu.Lock() | ||
| defer globalServerConfigMu.Unlock() | ||
| globalServerConfig = srvCfg | ||
| return nil | ||
| } | ||
|
|
||
| // NewConfigSys - creates new config system object. | ||
| func NewConfigSys() *ConfigSys { | ||
| return &ConfigSys{} | ||
| } | ||
|
|
||
| // Migrates ${HOME}/.minio/config.json to '<export_path>/.minio.sys/config/minio.json' | ||
| func migrateConfigToMinioSys() error { | ||
| // Construct path to config.json for the given bucket. | ||
| configFile := path.Join(bucketConfigPrefix, minioConfigFile) | ||
| transactionConfigFile := configFile + ".transaction" | ||
|
|
||
| // As object layer's GetObject() and PutObject() take respective lock on minioMetaBucket | ||
| // and configFile, take a transaction lock to avoid race. | ||
| objLock := globalNSMutex.NewNSLock(minioMetaBucket, transactionConfigFile) | ||
| if err := objLock.GetLock(globalOperationTimeout); err != nil { | ||
| return err | ||
| } | ||
| defer objLock.Unlock() | ||
|
|
||
| // Verify if backend already has the file. | ||
| if err := checkServerConfig(context.Background(), newObjectLayerFn()); err != errConfigNotFound { | ||
| return err | ||
| } // if errConfigNotFound proceed to migrate.. | ||
|
|
||
| data, err := ioutil.ReadFile(getConfigFile()) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| var config = &serverConfig{} | ||
| d := json.NewDecoder(bytes.NewReader(data)) | ||
| if err = d.Decode(config); err != nil { | ||
| return err | ||
| } | ||
|
|
||
| if err = quick.CheckData(config); err != nil { | ||
| return err | ||
| } | ||
|
|
||
| return saveServerConfig(newObjectLayerFn(), config) | ||
| } |
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