minio/cmd/global-heal.go

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/*
* 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"
"time"
"github.com/minio/minio/cmd/logger"
"github.com/minio/minio/pkg/madmin"
)
const (
bgHealingUUID = "0000-0000-0000-0000"
)
// NewBgHealSequence creates a background healing sequence
// operation which crawls all objects and heal them.
func newBgHealSequence() *healSequence {
reqInfo := &logger.ReqInfo{API: "BackgroundHeal"}
ctx, cancelCtx := context.WithCancel(logger.SetReqInfo(GlobalContext, reqInfo))
hs := madmin.HealOpts{
// Remove objects that do not have read-quorum
Remove: true,
ScanMode: madmin.HealNormalScan,
}
return &healSequence{
sourceCh: make(chan healSource),
respCh: make(chan healResult),
startTime: UTCNow(),
clientToken: bgHealingUUID,
// run-background heal with reserved bucket
bucket: minioReservedBucket,
settings: hs,
currentStatus: healSequenceStatus{
Summary: healNotStartedStatus,
HealSettings: hs,
},
cancelCtx: cancelCtx,
ctx: ctx,
reportProgress: false,
scannedItemsMap: make(map[madmin.HealItemType]int64),
healedItemsMap: make(map[madmin.HealItemType]int64),
healFailedItemsMap: make(map[string]int64),
}
}
func getLocalBackgroundHealStatus() (madmin.BgHealState, bool) {
if globalBackgroundHealState == nil {
return madmin.BgHealState{}, false
}
bgSeq, ok := globalBackgroundHealState.getHealSequenceByToken(bgHealingUUID)
if !ok {
return madmin.BgHealState{}, false
}
objAPI := newObjectLayerWithoutSafeModeFn()
if objAPI == nil {
return madmin.BgHealState{}, false
}
var healDisks []string
for _, ep := range getLocalDisksToHeal() {
healDisks = append(healDisks, ep.String())
}
return madmin.BgHealState{
ScannedItemsCount: bgSeq.getScannedItemsCount(),
LastHealActivity: bgSeq.lastHealActivity,
HealDisks: healDisks,
NextHealRound: UTCNow(),
}, true
}
// healErasureSet lists and heals all objects in a specific erasure set
func healErasureSet(ctx context.Context, setIndex int, xlObj *erasureObjects, setDriveCount int) error {
buckets, err := xlObj.ListBuckets(ctx)
if err != nil {
return err
}
// Get background heal sequence to send elements to heal
var bgSeq *healSequence
var ok bool
for {
bgSeq, ok = globalBackgroundHealState.getHealSequenceByToken(bgHealingUUID)
if ok {
break
}
select {
case <-ctx.Done():
return nil
case <-time.After(time.Second):
continue
}
}
buckets = append(buckets, BucketInfo{
Name: pathJoin(minioMetaBucket, minioConfigPrefix),
}, BucketInfo{
Name: pathJoin(minioMetaBucket, bucketConfigPrefix),
}) // add metadata .minio.sys/ bucket prefixes to heal
// Heal all buckets with all objects
for _, bucket := range buckets {
// Heal current bucket
bgSeq.sourceCh <- healSource{
bucket: bucket.Name,
}
var entryChs []FileInfoVersionsCh
for _, disk := range xlObj.getLoadBalancedDisks() {
if disk == nil {
// Disk can be offline
continue
}
entryCh, err := disk.WalkVersions(ctx, bucket.Name, "", "", true, ctx.Done())
if err != nil {
// Disk walk returned error, ignore it.
continue
}
entryChs = append(entryChs, FileInfoVersionsCh{
Ch: entryCh,
})
}
entriesValid := make([]bool, len(entryChs))
entries := make([]FileInfoVersions, len(entryChs))
for {
entry, quorumCount, ok := lexicallySortedEntryVersions(entryChs, entries, entriesValid)
if !ok {
break
}
if quorumCount == setDriveCount {
// Skip good entries.
continue
}
for _, version := range entry.Versions {
bgSeq.sourceCh <- healSource{
bucket: bucket.Name,
object: version.Name,
versionID: version.VersionID,
}
}
}
}
return nil
}
// deepHealObject heals given object path in deep to fix bitrot.
func deepHealObject(bucket, object, versionID string) {
// Get background heal sequence to send elements to heal
bgSeq, ok := globalBackgroundHealState.getHealSequenceByToken(bgHealingUUID)
if ok {
bgSeq.sourceCh <- healSource{
bucket: bucket,
object: object,
versionID: versionID,
opts: &madmin.HealOpts{ScanMode: madmin.HealDeepScan},
}
}
}