minio/config-migrate.go
Harshavardhana aaf97ea02c config/main: Re-write config files - add to new config v3
- New config format.

```
{
	"version": "3",
	"address": ":9000",
    "backend": {
          "type": "fs",
          "disk": "/path"
    },
	"credential": {
		"accessKey": "WLGDGYAQYIGI833EV05A",
		"secretKey": "BYvgJM101sHngl2uzjXS/OBF/aMxAN06JrJ3qJlF"
	},
	"region": "us-east-1",
	"logger": {
		"file": {
			"enable": false,
			"fileName": "",
			"level": "error"
		},
		"syslog": {
			"enable": false,
			"address": "",
			"level": "debug"
		},
		"console": {
			"enable": true,
			"level": "fatal"
		}
	}
}
```

New command lines in lieu of supporting XL.

Minio initialize filesystem backend.
~~~
$ minio init fs <path>
~~~

Minio initialize XL backend.
~~~
$ minio init xl <url1>...<url16>
~~~

For 'fs' backend it starts the server.
~~~
$ minio server
~~~

For 'xl' backend it waits for servers to join.
~~~
$ minio server
... [PROGRESS BAR] of servers connecting
~~~

Now on other servers execute 'join' and they connect.
~~~
....
minio join <url1> -- from <url2> && minio server
minio join <url1> -- from <url3> && minio server
...
...
minio join <url1> -- from <url16> && minio server
~~~
2016-03-23 19:16:09 -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/probe"
)
func migrateConfig() {
// Purge all configs with version '1'.
purgeV1()
// Migrate version '2' to '3'.
migrateV2ToV3()
}
// Version '1' is not supported anymore and deprecated, safe to delete.
func purgeV1() {
cv1, err := loadConfigV1()
if err != nil {
if os.IsNotExist(err.ToGoError()) {
return
}
}
fatalIf(err.Trace(), "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.Trace(), "Unable to retrieve config path.", nil)
configFile := filepath.Join(configPath, "fsUsers.json")
os.RemoveAll(configFile)
}
fatalIf(probe.NewError(errors.New("")), "Unexpected version found "+cv1.Version+", cannot migrate.", nil)
}
func migrateV2ToV3() {
cv2, err := loadConfigV2()
if err != nil {
if os.IsNotExist(err.ToGoError()) {
return
}
}
fatalIf(err.Trace(), "Unable to load config version 2.", nil)
if cv2.Version != "2" {
return
}
serverConfig.SetAddr(":9000")
serverConfig.SetCredential(credential{
AccessKeyID: cv2.Credentials.AccessKeyID,
SecretAccessKey: cv2.Credentials.SecretAccessKey,
})
serverConfig.SetRegion(cv2.Credentials.Region)
serverConfig.SetConsoleLogger(consoleLogger{
Enable: true,
Level: "fatal",
})
flogger := fileLogger{}
flogger.Level = "error"
if cv2.FileLogger.Filename != "" {
flogger.Enable = true
flogger.Filename = cv2.FileLogger.Filename
}
serverConfig.SetFileLogger(flogger)
slogger := syslogLogger{}
slogger.Level = "debug"
if cv2.SyslogLogger.Addr != "" {
slogger.Enable = true
slogger.Addr = cv2.SyslogLogger.Addr
}
serverConfig.SetSyslogLogger(slogger)
err = serverConfig.Save()
fatalIf(err.Trace(), "Migrating from version "+cv2.Version+" to "+serverConfig.GetVersion()+" failed.", nil)
console.Println("Migration from version " + cv2.Version + " to " + serverConfig.GetVersion() + " completed successfully.")
}