minio/config-migrate.go
2016-05-03 15:17:58 -07:00

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/*
* Minio Cloud Storage, (C) 2016 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 main
import (
"errors"
"os"
"path/filepath"
"github.com/minio/mc/pkg/console"
"github.com/minio/minio/pkg/quick"
)
func migrateConfig() {
// Purge all configs with version '1'.
purgeV1()
// Migrate version '2' to '3'.
migrateV2ToV3()
// Migrate version '3' to '4'.
migrateV3ToV4()
}
// Version '1' is not supported anymore and deprecated, safe to delete.
func purgeV1() {
cv1, err := loadConfigV1()
if err != nil && os.IsNotExist(err) {
return
}
fatalIf(err, "Unable to load config version 1.", nil)
if cv1.Version == "1" {
console.Println("Unsupported config version 1 found, removed successfully.")
/// Purge old fsUsers.json file
configPath, err := getConfigPath()
fatalIf(err, "Unable to retrieve config path.", nil)
configFile := filepath.Join(configPath, "fsUsers.json")
os.RemoveAll(configFile)
}
fatalIf(errors.New(""), "Unexpected version found "+cv1.Version+", cannot migrate.", nil)
}
// Version '2' to '3' config migration adds new fields and re-orders
// previous fields. Simplifies config for future additions.
func migrateV2ToV3() {
cv2, err := loadConfigV2()
if err != nil && os.IsNotExist(err) {
return
}
fatalIf(err, "Unable to load config version 2.", nil)
if cv2.Version != "2" {
return
}
srvConfig := &configV3{}
srvConfig.Version = "3"
srvConfig.Addr = ":9000"
srvConfig.Credential = credential{
AccessKeyID: cv2.Credentials.AccessKeyID,
SecretAccessKey: cv2.Credentials.SecretAccessKey,
}
srvConfig.Region = cv2.Credentials.Region
if srvConfig.Region == "" {
// Region needs to be set for AWS Signature V4.
srvConfig.Region = "us-east-1"
}
srvConfig.Logger.Console = consoleLogger{
Enable: true,
Level: "fatal",
}
flogger := fileLogger{}
flogger.Level = "error"
if cv2.FileLogger.Filename != "" {
flogger.Enable = true
flogger.Filename = cv2.FileLogger.Filename
}
srvConfig.Logger.File = flogger
slogger := syslogLogger{}
slogger.Level = "debug"
if cv2.SyslogLogger.Addr != "" {
slogger.Enable = true
slogger.Addr = cv2.SyslogLogger.Addr
}
srvConfig.Logger.Syslog = slogger
qc, err := quick.New(srvConfig)
fatalIf(err, "Unable to initialize config.", nil)
configFile, err := getConfigFile()
fatalIf(err, "Unable to get config file.", nil)
// Migrate the config.
err = qc.Save(configFile)
fatalIf(err, "Migrating from version "+cv2.Version+" to "+srvConfig.Version+" failed.", nil)
console.Println("Migration from version " + cv2.Version + " to " + srvConfig.Version + " completed successfully.")
}
// Version '3' to '4' migrates config, removes previous fields related
// to backend types and server address. This change further simplifies
// the config for future additions.
func migrateV3ToV4() {
cv3, err := loadConfigV3()
if err != nil && os.IsNotExist(err) {
return
}
fatalIf(err, "Unable to load config version 3.", nil)
if cv3.Version != "3" {
return
}
// Save only the new fields, ignore the rest.
srvConfig := &serverConfigV4{}
srvConfig.Version = globalMinioConfigVersion
srvConfig.Credential = cv3.Credential
srvConfig.Region = cv3.Region
if srvConfig.Region == "" {
// Region needs to be set for AWS Signature Version 4.
srvConfig.Region = "us-east-1"
}
srvConfig.Logger.Console = cv3.Logger.Console
srvConfig.Logger.File = cv3.Logger.File
srvConfig.Logger.Syslog = cv3.Logger.Syslog
qc, err := quick.New(srvConfig)
fatalIf(err, "Unable to initialize the quick config.", nil)
configFile, err := getConfigFile()
fatalIf(err, "Unable to get config file.", nil)
err = qc.Save(configFile)
fatalIf(err, "Migrating from version "+cv3.Version+" to "+srvConfig.Version+" failed.", nil)
console.Println("Migration from version " + cv3.Version + " to " + srvConfig.Version + " completed successfully.")
}