minio/cmd/local-admin-client.go

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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 (
"context"
"encoding/json"
"fmt"
"io/ioutil"
"os"
"path/filepath"
"time"
"github.com/minio/minio/cmd/logger"
)
// localAdminClient - represents admin operation to be executed locally.
type localAdminClient struct{}
// SignalService - sends a restart or stop signal to the local server
func (lc localAdminClient) SignalService(s serviceSignal) error {
switch s {
case serviceRestart, serviceStop:
globalServiceSignalCh <- s
default:
return errUnsupportedSignal
}
return nil
}
// ReInitFormat - re-initialize disk format.
func (lc localAdminClient) ReInitFormat(dryRun bool) error {
objectAPI := newObjectLayerFn()
if objectAPI == nil {
return errServerNotInitialized
}
return objectAPI.ReloadFormat(context.Background(), dryRun)
}
// ListLocks - Fetches lock information from local lock instrumentation.
func (lc localAdminClient) ListLocks(bucket, prefix string, duration time.Duration) ([]VolumeLockInfo, error) {
objectAPI := newObjectLayerFn()
if objectAPI == nil {
return nil, errServerNotInitialized
}
return objectAPI.ListLocks(context.Background(), bucket, prefix, duration)
}
// ServerInfo - Returns the server info of this server.
func (lc localAdminClient) ServerInfo() (sid ServerInfoData, e error) {
if globalBootTime.IsZero() {
return sid, errServerNotInitialized
}
// Build storage info
objLayer := newObjectLayerFn()
if objLayer == nil {
return sid, errServerNotInitialized
}
storage := objLayer.StorageInfo(context.Background())
return ServerInfoData{
StorageInfo: storage,
ConnStats: globalConnStats.toServerConnStats(),
HTTPStats: globalHTTPStats.toServerHTTPStats(),
Properties: ServerProperties{
Uptime: UTCNow().Sub(globalBootTime),
Version: Version,
CommitID: CommitID,
SQSARN: globalNotificationSys.GetARNList(),
Region: globalServerConfig.GetRegion(),
},
}, nil
}
// GetConfig - returns config.json of the local server.
func (lc localAdminClient) GetConfig() ([]byte, error) {
if globalServerConfig == nil {
return nil, fmt.Errorf("config not present")
}
return json.Marshal(globalServerConfig)
}
// WriteTmpConfig - writes config file content to a temporary file on
// the local server.
func (lc localAdminClient) WriteTmpConfig(tmpFileName string, configBytes []byte) error {
tmpConfigFile := filepath.Join(getConfigDir(), tmpFileName)
err := ioutil.WriteFile(tmpConfigFile, configBytes, 0666)
reqInfo := (&logger.ReqInfo{}).AppendTags("tmpConfigFile", tmpConfigFile)
ctx := logger.SetReqInfo(context.Background(), reqInfo)
logger.LogIf(ctx, err)
return err
}
// CommitConfig - Move the new config in tmpFileName onto config.json
// on a local node.
func (lc localAdminClient) CommitConfig(tmpFileName string) error {
configFile := getConfigFile()
tmpConfigFile := filepath.Join(getConfigDir(), tmpFileName)
err := os.Rename(tmpConfigFile, configFile)
reqInfo := (&logger.ReqInfo{}).AppendTags("tmpConfigFile", tmpConfigFile)
reqInfo.AppendTags("configFile", configFile)
ctx := logger.SetReqInfo(context.Background(), reqInfo)
logger.LogIf(ctx, err)
return err
}