heal: Remove daily sweeper code (#8462)

This has no effect on the functional change of the server

cmd/daily-sweeper.go

@@ -1,158 +0,0 @@
-/*
- * 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 (
-	"context"
-	"math/rand"
-	"sync"
-	"time"
-
-	"github.com/minio/minio/cmd/logger"
-)
-
-// The list of modules listening for the daily listing of all objects
-// such as the daily heal ops, disk usage and bucket lifecycle management.
-var globalDailySweepListeners = make([]chan string, 0)
-var globalDailySweepListenersMu = sync.Mutex{}
-
-// Add a new listener to the daily objects listing
-func registerDailySweepListener(ch chan string) {
-	globalDailySweepListenersMu.Lock()
-	defer globalDailySweepListenersMu.Unlock()
-
-	globalDailySweepListeners = append(globalDailySweepListeners, ch)
-}
-
-// Safe copy of globalDailySweepListeners content
-func copyDailySweepListeners() []chan string {
-	globalDailySweepListenersMu.Lock()
-	defer globalDailySweepListenersMu.Unlock()
-
-	var listenersCopy = make([]chan string, len(globalDailySweepListeners))
-	copy(listenersCopy, globalDailySweepListeners)
-
-	return listenersCopy
-}
-
-var sweepTimeout = newDynamicTimeout(60*time.Second, time.Second)
-
-// sweepRound will list all objects, having read quorum or not and
-// feeds to all listeners, such as the background healing
-func sweepRound(ctx context.Context, objAPI ObjectLayer) error {
-	// General lock so we avoid parallel daily sweep by different instances.
-	sweepLock := globalNSMutex.NewNSLock(ctx, "system", "daily-sweep")
-	if err := sweepLock.GetLock(sweepTimeout); err != nil {
-		return err
-	}
-	defer sweepLock.Unlock()
-
-	buckets, err := objAPI.ListBuckets(ctx)
-	if err != nil {
-		return err
-	}
-
-	// List all objects, having read quorum or not in all buckets
-	// and send them to all the registered sweep listeners
-	for _, bucket := range buckets {
-		// Send bucket names to all listeners
-		for _, l := range copyDailySweepListeners() {
-			l <- bucket.Name
-		}
-
-		marker := ""
-		for {
-			if globalHTTPServer != nil {
-				// Wait at max 10 minute for an inprogress request before proceeding to heal
-				waitCount := 600
-				// Any requests in progress, delay the heal.
-				for (globalHTTPServer.GetRequestCount() >= int32(globalXLSetCount*globalXLSetDriveCount)) &&
-					waitCount > 0 {
-					waitCount--
-					time.Sleep(1 * time.Second)
-				}
-			}
-
-			res, err := objAPI.ListObjectsHeal(ctx, bucket.Name, "", marker, "", 1000)
-			if err != nil {
-				continue
-			}
-
-			for _, obj := range res.Objects {
-				for _, l := range copyDailySweepListeners() {
-					l <- pathJoin(bucket.Name, obj.Name)
-				}
-			}
-			if !res.IsTruncated {
-				break
-			} else {
-				marker = res.NextMarker
-			}
-		}
-	}
-
-	return nil
-}
-
-// initDailySweeper creates a go-routine which will list all
-// objects in all buckets in a daily basis
-func initDailySweeper() {
-	go dailySweeper()
-}
-
-// List all objects in all buckets in a daily basis
-func dailySweeper() {
-	var lastSweepTime time.Time
-	var objAPI ObjectLayer
-
-	var ctx = context.Background()
-
-	// Wait until the object layer is ready
-	for {
-		objAPI = newObjectLayerFn()
-		if objAPI == nil {
-			time.Sleep(time.Second)
-			continue
-		}
-		break
-	}
-
-	// Start with random sleep time, so as to avoid "synchronous checks" between servers
-	time.Sleep(time.Duration(rand.Float64() * float64(time.Hour)))
-
-	for {
-		if time.Since(lastSweepTime) < 30*24*time.Hour {
-			time.Sleep(time.Hour)
-			continue
-		}
-
-		err := sweepRound(ctx, objAPI)
-		if err != nil {
-			switch err.(type) {
-			// Unable to hold a lock means there is another
-			// instance doing the sweep round
-			case OperationTimedOut:
-				lastSweepTime = time.Now()
-				continue
-			}
-			logger.LogIf(ctx, err)
-			time.Sleep(time.Minute)
-			continue
-		}
-		lastSweepTime = time.Now()
-	}
-}