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minio/cmd/data-usage.go

145 lines
3.6 KiB

/*
* MinIO Cloud Storage, (C) 2019 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"
"time"
jsoniter "github.com/json-iterator/go"
"github.com/minio/minio/cmd/logger"
"github.com/minio/minio/pkg/hash"
)
const (
dataUsageObjName = "data-usage"
dataUsageCrawlInterval = 12 * time.Hour
)
func initDataUsageStats() {
go runDataUsageInfoUpdateRoutine()
}
func runDataUsageInfoUpdateRoutine() {
// Wait until the object layer is ready
var objAPI ObjectLayer
for {
objAPI = newObjectLayerWithoutSafeModeFn()
if objAPI == nil {
time.Sleep(time.Second)
continue
}
break
}
ctx := context.Background()
switch v := objAPI.(type) {
case *xlZones:
runDataUsageInfoForXLZones(ctx, v, GlobalServiceDoneCh)
case *FSObjects:
runDataUsageInfoForFS(ctx, v, GlobalServiceDoneCh)
default:
return
}
}
func runDataUsageInfoForFS(ctx context.Context, fsObj *FSObjects, endCh <-chan struct{}) {
t := time.NewTicker(dataUsageCrawlInterval)
defer t.Stop()
for {
// Get data usage info of the FS Object
usageInfo := fsObj.crawlAndGetDataUsageInfo(ctx, endCh)
// Save the data usage in the disk
err := storeDataUsageInBackend(ctx, fsObj, usageInfo)
if err != nil {
logger.LogIf(ctx, err)
}
select {
case <-endCh:
return
// Wait until the next crawl interval
case <-t.C:
}
}
}
func runDataUsageInfoForXLZones(ctx context.Context, z *xlZones, endCh <-chan struct{}) {
locker := z.NewNSLock(ctx, minioMetaBucket, "leader-data-usage-info")
for {
err := locker.GetLock(newDynamicTimeout(time.Millisecond, time.Millisecond))
if err != nil {
time.Sleep(5 * time.Minute)
continue
}
// Break without unlocking, this node will acquire
// data usage calculator role for its lifetime.
break
}
t := time.NewTicker(dataUsageCrawlInterval)
defer t.Stop()
for {
usageInfo := z.crawlAndGetDataUsage(ctx, endCh)
err := storeDataUsageInBackend(ctx, z, usageInfo)
if err != nil {
logger.LogIf(ctx, err)
}
select {
case <-endCh:
locker.Unlock()
return
case <-t.C:
}
}
}
func storeDataUsageInBackend(ctx context.Context, objAPI ObjectLayer, dataUsageInfo DataUsageInfo) error {
dataUsageJSON, err := json.Marshal(dataUsageInfo)
if err != nil {
return err
}
size := int64(len(dataUsageJSON))
r, err := hash.NewReader(bytes.NewReader(dataUsageJSON), size, "", "", size, false)
if err != nil {
return err
}
_, err = objAPI.PutObject(ctx, minioMetaBackgroundOpsBucket, dataUsageObjName, NewPutObjReader(r, nil, nil), ObjectOptions{})
return err
}
func loadDataUsageFromBackend(ctx context.Context, objAPI ObjectLayer) (DataUsageInfo, error) {
var dataUsageInfoJSON bytes.Buffer
err := objAPI.GetObject(ctx, minioMetaBackgroundOpsBucket, dataUsageObjName, 0, -1, &dataUsageInfoJSON, "", ObjectOptions{})
if err != nil {
return DataUsageInfo{}, nil
}
var dataUsageInfo DataUsageInfo
var json = jsoniter.ConfigCompatibleWithStandardLibrary
err = json.Unmarshal(dataUsageInfoJSON.Bytes(), &dataUsageInfo)
if err != nil {
return DataUsageInfo{}, err
}
return dataUsageInfo, nil
}