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459 lines
12 KiB
Go
459 lines
12 KiB
Go
// Copyright (c) 2015-2022 MinIO, Inc.
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//
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// This file is part of MinIO Object Storage stack
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package cmd
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import (
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"context"
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"fmt"
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"sort"
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"strconv"
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"time"
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"github.com/dustin/go-humanize"
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"github.com/minio/madmin-go"
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"github.com/minio/minio/internal/color"
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"github.com/minio/minio/internal/config/storageclass"
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"github.com/minio/minio/internal/jobtokens"
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"github.com/minio/minio/internal/logger"
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"github.com/minio/pkg/console"
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"github.com/minio/pkg/env"
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"github.com/minio/pkg/wildcard"
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)
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const (
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bgHealingUUID = "0000-0000-0000-0000"
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)
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// NewBgHealSequence creates a background healing sequence
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// operation which scans all objects and heal them.
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func newBgHealSequence() *healSequence {
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reqInfo := &logger.ReqInfo{API: "BackgroundHeal"}
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ctx, cancelCtx := context.WithCancel(logger.SetReqInfo(GlobalContext, reqInfo))
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hs := madmin.HealOpts{
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// Remove objects that do not have read-quorum
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Remove: healDeleteDangling,
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}
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return &healSequence{
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respCh: make(chan healResult),
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startTime: UTCNow(),
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clientToken: bgHealingUUID,
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// run-background heal with reserved bucket
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bucket: minioReservedBucket,
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settings: hs,
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currentStatus: healSequenceStatus{
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Summary: healNotStartedStatus,
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HealSettings: hs,
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},
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cancelCtx: cancelCtx,
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ctx: ctx,
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reportProgress: false,
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scannedItemsMap: make(map[madmin.HealItemType]int64),
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healedItemsMap: make(map[madmin.HealItemType]int64),
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healFailedItemsMap: make(map[string]int64),
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}
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}
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// getBackgroundHealStatus will return the
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func getBackgroundHealStatus(ctx context.Context, o ObjectLayer) (madmin.BgHealState, bool) {
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if globalBackgroundHealState == nil {
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return madmin.BgHealState{}, false
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}
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bgSeq, ok := globalBackgroundHealState.getHealSequenceByToken(bgHealingUUID)
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if !ok {
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return madmin.BgHealState{}, false
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}
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status := madmin.BgHealState{
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ScannedItemsCount: bgSeq.getScannedItemsCount(),
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}
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if globalMRFState.initialized() {
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status.MRF = map[string]madmin.MRFStatus{
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globalLocalNodeName: globalMRFState.getCurrentMRFRoundInfo(),
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}
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}
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healDisksMap := map[string]struct{}{}
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for _, ep := range getLocalDisksToHeal() {
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healDisksMap[ep.String()] = struct{}{}
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}
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if o == nil {
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healing := globalBackgroundHealState.getLocalHealingDisks()
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for _, disk := range healing {
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status.HealDisks = append(status.HealDisks, disk.Endpoint)
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}
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return status, true
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}
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// ignores any errors here.
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si, _ := o.StorageInfo(ctx)
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indexed := make(map[string][]madmin.Disk)
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for _, disk := range si.Disks {
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setIdx := fmt.Sprintf("%d-%d", disk.PoolIndex, disk.SetIndex)
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indexed[setIdx] = append(indexed[setIdx], disk)
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}
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for id, disks := range indexed {
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ss := madmin.SetStatus{
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ID: id,
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SetIndex: disks[0].SetIndex,
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PoolIndex: disks[0].PoolIndex,
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}
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for _, disk := range disks {
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ss.Disks = append(ss.Disks, disk)
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if disk.Healing {
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ss.HealStatus = "Healing"
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ss.HealPriority = "high"
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status.HealDisks = append(status.HealDisks, disk.Endpoint)
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}
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}
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sortDisks(ss.Disks)
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status.Sets = append(status.Sets, ss)
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}
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sort.Slice(status.Sets, func(i, j int) bool {
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return status.Sets[i].ID < status.Sets[j].ID
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})
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backendInfo := o.BackendInfo()
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status.SCParity = make(map[string]int)
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status.SCParity[storageclass.STANDARD] = backendInfo.StandardSCParity
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status.SCParity[storageclass.RRS] = backendInfo.RRSCParity
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return status, true
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}
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func mustGetHealSequence(ctx context.Context) *healSequence {
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// Get background heal sequence to send elements to heal
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for {
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globalHealStateLK.RLock()
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hstate := globalBackgroundHealState
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globalHealStateLK.RUnlock()
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if hstate == nil {
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time.Sleep(time.Second)
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continue
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}
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bgSeq, ok := hstate.getHealSequenceByToken(bgHealingUUID)
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if !ok {
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time.Sleep(time.Second)
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continue
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}
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return bgSeq
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}
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}
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const envHealWorkers = "_MINIO_HEAL_WORKERS"
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// healErasureSet lists and heals all objects in a specific erasure set
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func (er *erasureObjects) healErasureSet(ctx context.Context, buckets []string, tracker *healingTracker) error {
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bgSeq := mustGetHealSequence(ctx)
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scanMode := madmin.HealNormalScan
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// Make sure to copy since `buckets slice`
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// is modified in place by tracker.
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healBuckets := make([]string, len(buckets))
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copy(healBuckets, buckets)
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// Heal all buckets first in this erasure set - this is useful
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// for new objects upload in different buckets to be successful
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for _, bucket := range healBuckets {
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_, err := er.HealBucket(ctx, bucket, madmin.HealOpts{ScanMode: scanMode})
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if err != nil {
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// Log bucket healing error if any, we shall retry again.
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logger.LogIf(ctx, err)
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}
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}
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// numHealers - number of concurrent heal jobs, defaults to 1
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numHealers, err := strconv.Atoi(env.Get(envHealWorkers, "1"))
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if err != nil {
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logger.LogIf(ctx, fmt.Errorf("invalid %s value %v, defaulting to 1", envHealWorkers, err))
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}
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if numHealers < 1 {
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numHealers = 1
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}
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// jt will never be nil since we ensure that numHealers > 0
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jt, _ := jobtokens.New(numHealers)
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var retErr error
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// Heal all buckets with all objects
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for _, bucket := range healBuckets {
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if tracker.isHealed(bucket) {
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continue
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}
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var forwardTo string
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// If we resume to the same bucket, forward to last known item.
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if tracker.Bucket != "" {
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if tracker.Bucket == bucket {
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forwardTo = tracker.Object
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} else {
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// Reset to where last bucket ended if resuming.
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tracker.resume()
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}
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}
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tracker.Object = ""
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tracker.Bucket = bucket
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// Heal current bucket again in case if it is failed
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// in the being of erasure set healing
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if _, err := er.HealBucket(ctx, bucket, madmin.HealOpts{
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ScanMode: scanMode,
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}); err != nil {
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logger.LogIf(ctx, err)
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continue
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}
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if serverDebugLog {
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console.Debugf(color.Green("healDrive:")+" healing bucket %s content on %s erasure set\n",
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bucket, humanize.Ordinal(tracker.SetIndex+1))
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}
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disks, _ := er.getOnlineDisksWithHealing()
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if len(disks) == 0 {
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// all disks are healing in this set, this is allowed
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// so we simply proceed to next bucket, marking the bucket
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// as done as there are no objects to heal.
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tracker.bucketDone(bucket)
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logger.LogIf(ctx, tracker.update(ctx))
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continue
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}
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// Limit listing to 3 drives.
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if len(disks) > 3 {
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disks = disks[:3]
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}
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type healEntryResult struct {
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bytes uint64
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success bool
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entryDone bool
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name string
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}
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healEntryDone := func(name string) healEntryResult {
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return healEntryResult{
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entryDone: true,
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name: name,
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}
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}
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healEntrySuccess := func(sz uint64) healEntryResult {
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return healEntryResult{
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bytes: sz,
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success: true,
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}
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}
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healEntryFailure := func(sz uint64) healEntryResult {
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return healEntryResult{
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bytes: sz,
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}
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}
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// Collect updates to tracker from concurrent healEntry calls
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results := make(chan healEntryResult)
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go func() {
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for res := range results {
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if res.entryDone {
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tracker.Object = res.name
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if time.Since(tracker.LastUpdate) > time.Minute {
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logger.LogIf(ctx, tracker.update(ctx))
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}
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continue
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}
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if res.success {
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tracker.ItemsHealed++
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tracker.BytesDone += res.bytes
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} else {
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tracker.ItemsFailed++
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tracker.BytesFailed += res.bytes
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}
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}
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}()
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// Note: updates from healEntry to tracker must be sent on results channel.
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healEntry := func(entry metaCacheEntry) {
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defer jt.Give()
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if entry.name == "" && len(entry.metadata) == 0 {
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// ignore entries that don't have metadata.
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return
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}
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if entry.isDir() {
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// ignore healing entry.name's with `/` suffix.
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return
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}
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// We might land at .metacache, .trash, .multipart
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// no need to heal them skip, only when bucket
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// is '.minio.sys'
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if bucket == minioMetaBucket {
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if wildcard.Match("buckets/*/.metacache/*", entry.name) {
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return
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}
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if wildcard.Match("tmp/.trash/*", entry.name) {
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return
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}
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if wildcard.Match("multipart/*", entry.name) {
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return
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}
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}
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var result healEntryResult
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fivs, err := entry.fileInfoVersions(bucket)
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if err != nil {
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err := bgSeq.queueHealTask(healSource{
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bucket: bucket,
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object: entry.name,
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versionID: "",
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}, madmin.HealItemObject)
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if err != nil {
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result = healEntryFailure(0)
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logger.LogIf(ctx, fmt.Errorf("unable to heal object %s/%s: %w", bucket, entry.name, err))
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} else {
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result = healEntrySuccess(0)
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}
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select {
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case <-ctx.Done():
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return
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case results <- result:
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}
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return
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}
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// erasureObjects layer needs object names to be encoded
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encodedEntryName := encodeDirObject(entry.name)
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if healDeleteDangling {
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err := er.checkAbandonedParts(ctx, bucket, encodedEntryName, madmin.HealOpts{Remove: healDeleteDangling})
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if err != nil {
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logger.LogIf(ctx, fmt.Errorf("unable to check object %s/%s for abandoned data: %w", bucket, entry.name, err))
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}
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}
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for _, version := range fivs.Versions {
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if _, err := er.HealObject(ctx, bucket, encodedEntryName,
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version.VersionID, madmin.HealOpts{
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ScanMode: scanMode,
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Remove: healDeleteDangling,
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}); err != nil {
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// If not deleted, assume they failed.
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result = healEntryFailure(uint64(version.Size))
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if version.VersionID != "" {
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logger.LogIf(ctx, fmt.Errorf("unable to heal object %s/%s-v(%s): %w", bucket, version.Name, version.VersionID, err))
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} else {
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logger.LogIf(ctx, fmt.Errorf("unable to heal object %s/%s: %w", bucket, version.Name, err))
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}
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} else {
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result = healEntrySuccess(uint64(version.Size))
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}
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bgSeq.logHeal(madmin.HealItemObject)
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select {
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case <-ctx.Done():
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return
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case results <- result:
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}
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}
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select {
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case <-ctx.Done():
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return
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case results <- healEntryDone(entry.name):
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}
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// Wait and proceed if there are active requests
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waitForLowHTTPReq()
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}
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// How to resolve partial results.
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resolver := metadataResolutionParams{
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dirQuorum: 1,
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objQuorum: 1,
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bucket: bucket,
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}
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err = listPathRaw(ctx, listPathRawOptions{
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disks: disks,
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bucket: bucket,
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recursive: true,
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forwardTo: forwardTo,
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minDisks: 1,
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reportNotFound: false,
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agreed: func(entry metaCacheEntry) {
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jt.Take()
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go healEntry(entry)
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},
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partial: func(entries metaCacheEntries, _ []error) {
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entry, ok := entries.resolve(&resolver)
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if !ok {
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// check if we can get one entry atleast
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// proceed to heal nonetheless.
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entry, _ = entries.firstFound()
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}
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jt.Take()
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go healEntry(*entry)
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},
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finished: nil,
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})
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jt.Wait() // synchronize all the concurrent heal jobs
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close(results)
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if err != nil {
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// Set this such that when we return this function
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// we let the caller retry this disk again for the
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// buckets it failed to list.
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retErr = err
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logger.LogIf(ctx, err)
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continue
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}
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select {
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// If context is canceled don't mark as done...
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case <-ctx.Done():
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return ctx.Err()
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default:
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tracker.bucketDone(bucket)
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logger.LogIf(ctx, tracker.update(ctx))
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}
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}
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tracker.Object = ""
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tracker.Bucket = ""
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return retErr
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}
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// healObject heals given object path in deep to fix bitrot.
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func healObject(bucket, object, versionID string, scan madmin.HealScanMode) {
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// Get background heal sequence to send elements to heal
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globalHealStateLK.Lock()
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bgSeq, ok := globalBackgroundHealState.getHealSequenceByToken(bgHealingUUID)
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globalHealStateLK.Unlock()
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if ok {
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bgSeq.queueHealTask(healSource{
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bucket: bucket,
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object: object,
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versionID: versionID,
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opts: &madmin.HealOpts{
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Remove: healDeleteDangling, // if found dangling purge it.
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ScanMode: scan,
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},
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}, madmin.HealItemObject)
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}
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}
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