mirror of https://github.com/minio/minio.git
897 lines
25 KiB
Go
897 lines
25 KiB
Go
// Copyright (c) 2015-2021 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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"errors"
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"fmt"
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"io"
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"math/rand"
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"strconv"
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"strings"
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"sync"
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"sync/atomic"
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"time"
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"github.com/minio/madmin-go"
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"github.com/minio/minio/internal/logger"
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"github.com/minio/pkg/env"
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)
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//go:generate stringer -type=storageMetric -trimprefix=storageMetric $GOFILE
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type storageMetric uint8
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const (
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storageMetricMakeVolBulk storageMetric = iota
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storageMetricMakeVol
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storageMetricListVols
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storageMetricStatVol
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storageMetricDeleteVol
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storageMetricWalkDir
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storageMetricListDir
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storageMetricReadFile
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storageMetricAppendFile
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storageMetricCreateFile
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storageMetricReadFileStream
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storageMetricRenameFile
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storageMetricRenameData
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storageMetricCheckParts
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storageMetricDelete
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storageMetricDeleteVersions
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storageMetricVerifyFile
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storageMetricWriteAll
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storageMetricDeleteVersion
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storageMetricWriteMetadata
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storageMetricUpdateMetadata
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storageMetricReadVersion
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storageMetricReadXL
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storageMetricReadAll
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storageMetricStatInfoFile
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storageMetricReadMultiple
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storageMetricDeleteAbandonedParts
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storageMetricDiskInfo
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// .... add more
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storageMetricLast
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)
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// Detects change in underlying disk.
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type xlStorageDiskIDCheck struct {
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// apiCalls should be placed first so alignment is guaranteed for atomic operations.
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apiCalls [storageMetricLast]uint64
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apiLatencies [storageMetricLast]*lockedLastMinuteLatency
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diskID string
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storage *xlStorage
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health *diskHealthTracker
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metricsCache timedValue
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}
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func (p *xlStorageDiskIDCheck) getMetrics() DiskMetrics {
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p.metricsCache.Once.Do(func() {
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p.metricsCache.TTL = 100 * time.Millisecond
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p.metricsCache.Update = func() (interface{}, error) {
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diskMetric := DiskMetrics{
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LastMinute: make(map[string]AccElem, len(p.apiLatencies)),
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APICalls: make(map[string]uint64, len(p.apiCalls)),
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}
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for i, v := range p.apiLatencies {
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diskMetric.LastMinute[storageMetric(i).String()] = v.total()
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}
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for i := range p.apiCalls {
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diskMetric.APICalls[storageMetric(i).String()] = atomic.LoadUint64(&p.apiCalls[i])
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}
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return diskMetric, nil
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}
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})
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m, _ := p.metricsCache.Get()
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return m.(DiskMetrics)
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}
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type lockedLastMinuteLatency struct {
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sync.Mutex
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lastMinuteLatency
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}
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func (e *lockedLastMinuteLatency) add(value time.Duration) {
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e.Lock()
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defer e.Unlock()
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e.lastMinuteLatency.add(value)
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}
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// addSize will add a duration and size.
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func (e *lockedLastMinuteLatency) addSize(value time.Duration, sz int64) {
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e.Lock()
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defer e.Unlock()
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e.lastMinuteLatency.addSize(value, sz)
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}
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// total returns the total call count and latency for the last minute.
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func (e *lockedLastMinuteLatency) total() AccElem {
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e.Lock()
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defer e.Unlock()
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return e.lastMinuteLatency.getTotal()
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}
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func newXLStorageDiskIDCheck(storage *xlStorage) *xlStorageDiskIDCheck {
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xl := xlStorageDiskIDCheck{
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storage: storage,
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health: newDiskHealthTracker(),
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}
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for i := range xl.apiLatencies[:] {
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xl.apiLatencies[i] = &lockedLastMinuteLatency{}
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}
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return &xl
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}
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func (p *xlStorageDiskIDCheck) String() string {
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return p.storage.String()
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}
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func (p *xlStorageDiskIDCheck) IsOnline() bool {
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storedDiskID, err := p.storage.GetDiskID()
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if err != nil {
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return false
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}
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return storedDiskID == p.diskID
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}
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func (p *xlStorageDiskIDCheck) LastConn() time.Time {
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return p.storage.LastConn()
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}
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func (p *xlStorageDiskIDCheck) IsLocal() bool {
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return p.storage.IsLocal()
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}
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func (p *xlStorageDiskIDCheck) Endpoint() Endpoint {
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return p.storage.Endpoint()
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}
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func (p *xlStorageDiskIDCheck) Hostname() string {
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return p.storage.Hostname()
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}
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func (p *xlStorageDiskIDCheck) Healing() *healingTracker {
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return p.storage.Healing()
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}
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func (p *xlStorageDiskIDCheck) NSScanner(ctx context.Context, cache dataUsageCache, updates chan<- dataUsageEntry, scanMode madmin.HealScanMode) (dataUsageCache, error) {
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if contextCanceled(ctx) {
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return dataUsageCache{}, ctx.Err()
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}
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if err := p.checkDiskStale(); err != nil {
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return dataUsageCache{}, err
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}
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return p.storage.NSScanner(ctx, cache, updates, scanMode)
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}
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func (p *xlStorageDiskIDCheck) GetDiskLoc() (poolIdx, setIdx, diskIdx int) {
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return p.storage.GetDiskLoc()
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}
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func (p *xlStorageDiskIDCheck) SetDiskLoc(poolIdx, setIdx, diskIdx int) {
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p.storage.SetDiskLoc(poolIdx, setIdx, diskIdx)
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}
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func (p *xlStorageDiskIDCheck) Close() error {
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return p.storage.Close()
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}
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func (p *xlStorageDiskIDCheck) GetDiskID() (string, error) {
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return p.storage.GetDiskID()
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}
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func (p *xlStorageDiskIDCheck) SetDiskID(id string) {
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p.diskID = id
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}
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func (p *xlStorageDiskIDCheck) checkDiskStale() error {
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if p.diskID == "" {
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// For empty disk-id we allow the call as the server might be
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// coming up and trying to read format.json or create format.json
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return nil
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}
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storedDiskID, err := p.storage.GetDiskID()
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if err != nil {
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// return any error generated while reading `format.json`
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return err
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}
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if err == nil && p.diskID == storedDiskID {
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return nil
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}
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// not the same disk we remember, take it offline.
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return errDiskNotFound
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}
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func (p *xlStorageDiskIDCheck) DiskInfo(ctx context.Context) (info DiskInfo, err error) {
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if contextCanceled(ctx) {
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return DiskInfo{}, ctx.Err()
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}
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si := p.updateStorageMetrics(storageMetricDiskInfo)
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defer si(&err)
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info, err = p.storage.DiskInfo(ctx)
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if err != nil {
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return info, err
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}
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info.Metrics = p.getMetrics()
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// check cached diskID against backend
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// only if its non-empty.
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if p.diskID != "" {
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if p.diskID != info.ID {
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return info, errDiskNotFound
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}
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}
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if p.health.isFaulty() {
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// if disk is already faulty return faulty for 'mc admin info' output and prometheus alerts.
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return info, errFaultyDisk
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}
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return info, nil
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}
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func (p *xlStorageDiskIDCheck) MakeVolBulk(ctx context.Context, volumes ...string) (err error) {
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ctx, done, err := p.TrackDiskHealth(ctx, storageMetricMakeVolBulk, volumes...)
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if err != nil {
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return err
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}
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defer done(&err)
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return p.storage.MakeVolBulk(ctx, volumes...)
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}
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func (p *xlStorageDiskIDCheck) MakeVol(ctx context.Context, volume string) (err error) {
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ctx, done, err := p.TrackDiskHealth(ctx, storageMetricMakeVol, volume)
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if err != nil {
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return err
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}
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defer done(&err)
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if contextCanceled(ctx) {
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return ctx.Err()
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}
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if err = p.checkDiskStale(); err != nil {
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return err
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}
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return p.storage.MakeVol(ctx, volume)
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}
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func (p *xlStorageDiskIDCheck) ListVols(ctx context.Context) (vi []VolInfo, err error) {
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ctx, done, err := p.TrackDiskHealth(ctx, storageMetricListVols, "/")
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if err != nil {
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return nil, err
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}
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defer done(&err)
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return p.storage.ListVols(ctx)
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}
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func (p *xlStorageDiskIDCheck) StatVol(ctx context.Context, volume string) (vol VolInfo, err error) {
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ctx, done, err := p.TrackDiskHealth(ctx, storageMetricStatVol, volume)
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if err != nil {
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return vol, err
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}
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defer done(&err)
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return p.storage.StatVol(ctx, volume)
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}
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func (p *xlStorageDiskIDCheck) DeleteVol(ctx context.Context, volume string, forceDelete bool) (err error) {
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ctx, done, err := p.TrackDiskHealth(ctx, storageMetricDeleteVol, volume)
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if err != nil {
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return err
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}
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defer done(&err)
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return p.storage.DeleteVol(ctx, volume, forceDelete)
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}
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func (p *xlStorageDiskIDCheck) ListDir(ctx context.Context, volume, dirPath string, count int) (s []string, err error) {
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ctx, done, err := p.TrackDiskHealth(ctx, storageMetricListDir, volume, dirPath)
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if err != nil {
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return nil, err
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}
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defer done(&err)
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return p.storage.ListDir(ctx, volume, dirPath, count)
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}
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func (p *xlStorageDiskIDCheck) ReadFile(ctx context.Context, volume string, path string, offset int64, buf []byte, verifier *BitrotVerifier) (n int64, err error) {
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ctx, done, err := p.TrackDiskHealth(ctx, storageMetricReadFile, volume, path)
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if err != nil {
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return 0, err
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}
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defer done(&err)
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return p.storage.ReadFile(ctx, volume, path, offset, buf, verifier)
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}
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func (p *xlStorageDiskIDCheck) AppendFile(ctx context.Context, volume string, path string, buf []byte) (err error) {
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ctx, done, err := p.TrackDiskHealth(ctx, storageMetricAppendFile, volume, path)
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if err != nil {
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return err
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}
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defer done(&err)
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return p.storage.AppendFile(ctx, volume, path, buf)
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}
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func (p *xlStorageDiskIDCheck) CreateFile(ctx context.Context, volume, path string, size int64, reader io.Reader) (err error) {
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ctx, done, err := p.TrackDiskHealth(ctx, storageMetricCreateFile, volume, path)
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if err != nil {
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return err
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}
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defer done(&err)
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return p.storage.CreateFile(ctx, volume, path, size, reader)
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}
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func (p *xlStorageDiskIDCheck) ReadFileStream(ctx context.Context, volume, path string, offset, length int64) (io.ReadCloser, error) {
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ctx, done, err := p.TrackDiskHealth(ctx, storageMetricReadFileStream, volume, path)
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if err != nil {
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return nil, err
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}
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defer done(&err)
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return p.storage.ReadFileStream(ctx, volume, path, offset, length)
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}
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func (p *xlStorageDiskIDCheck) RenameFile(ctx context.Context, srcVolume, srcPath, dstVolume, dstPath string) (err error) {
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ctx, done, err := p.TrackDiskHealth(ctx, storageMetricRenameFile, srcVolume, srcPath, dstVolume, dstPath)
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if err != nil {
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return err
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}
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defer done(&err)
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return p.storage.RenameFile(ctx, srcVolume, srcPath, dstVolume, dstPath)
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}
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func (p *xlStorageDiskIDCheck) RenameData(ctx context.Context, srcVolume, srcPath string, fi FileInfo, dstVolume, dstPath string) (sign uint64, err error) {
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ctx, done, err := p.TrackDiskHealth(ctx, storageMetricRenameData, srcPath, fi.DataDir, dstVolume, dstPath)
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if err != nil {
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return 0, err
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}
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defer done(&err)
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return p.storage.RenameData(ctx, srcVolume, srcPath, fi, dstVolume, dstPath)
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}
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func (p *xlStorageDiskIDCheck) CheckParts(ctx context.Context, volume string, path string, fi FileInfo) (err error) {
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ctx, done, err := p.TrackDiskHealth(ctx, storageMetricCheckParts, volume, path)
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if err != nil {
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return err
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}
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defer done(&err)
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return p.storage.CheckParts(ctx, volume, path, fi)
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}
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func (p *xlStorageDiskIDCheck) Delete(ctx context.Context, volume string, path string, deleteOpts DeleteOptions) (err error) {
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ctx, done, err := p.TrackDiskHealth(ctx, storageMetricDelete, volume, path)
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if err != nil {
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return err
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}
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defer done(&err)
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return p.storage.Delete(ctx, volume, path, deleteOpts)
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}
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// DeleteVersions deletes slice of versions, it can be same object
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// or multiple objects.
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func (p *xlStorageDiskIDCheck) DeleteVersions(ctx context.Context, volume string, versions []FileInfoVersions) (errs []error) {
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// Merely for tracing storage
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path := ""
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if len(versions) > 0 {
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path = versions[0].Name
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}
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errs = make([]error, len(versions))
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ctx, done, err := p.TrackDiskHealth(ctx, storageMetricDeleteVersions, volume, path)
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if err != nil {
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for i := range errs {
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errs[i] = ctx.Err()
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}
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return errs
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}
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defer done(&err)
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errs = p.storage.DeleteVersions(ctx, volume, versions)
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for i := range errs {
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if errs[i] != nil {
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err = errs[i]
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break
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}
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}
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return errs
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}
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func (p *xlStorageDiskIDCheck) VerifyFile(ctx context.Context, volume, path string, fi FileInfo) (err error) {
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ctx, done, err := p.TrackDiskHealth(ctx, storageMetricVerifyFile, volume, path)
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if err != nil {
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return err
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}
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defer done(&err)
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return p.storage.VerifyFile(ctx, volume, path, fi)
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}
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func (p *xlStorageDiskIDCheck) WriteAll(ctx context.Context, volume string, path string, b []byte) (err error) {
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ctx, done, err := p.TrackDiskHealth(ctx, storageMetricWriteAll, volume, path)
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if err != nil {
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return err
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}
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defer done(&err)
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return p.storage.WriteAll(ctx, volume, path, b)
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}
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func (p *xlStorageDiskIDCheck) DeleteVersion(ctx context.Context, volume, path string, fi FileInfo, forceDelMarker bool) (err error) {
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ctx, done, err := p.TrackDiskHealth(ctx, storageMetricDeleteVersion, volume, path)
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if err != nil {
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return err
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}
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defer done(&err)
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return p.storage.DeleteVersion(ctx, volume, path, fi, forceDelMarker)
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}
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func (p *xlStorageDiskIDCheck) UpdateMetadata(ctx context.Context, volume, path string, fi FileInfo) (err error) {
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ctx, done, err := p.TrackDiskHealth(ctx, storageMetricUpdateMetadata, volume, path)
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if err != nil {
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return err
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}
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defer done(&err)
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return p.storage.UpdateMetadata(ctx, volume, path, fi)
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}
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func (p *xlStorageDiskIDCheck) WriteMetadata(ctx context.Context, volume, path string, fi FileInfo) (err error) {
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ctx, done, err := p.TrackDiskHealth(ctx, storageMetricWriteMetadata, volume, path)
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if err != nil {
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return err
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}
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defer done(&err)
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return p.storage.WriteMetadata(ctx, volume, path, fi)
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}
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func (p *xlStorageDiskIDCheck) ReadVersion(ctx context.Context, volume, path, versionID string, readData bool) (fi FileInfo, err error) {
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ctx, done, err := p.TrackDiskHealth(ctx, storageMetricReadVersion, volume, path)
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if err != nil {
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return fi, err
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}
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defer done(&err)
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return p.storage.ReadVersion(ctx, volume, path, versionID, readData)
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}
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func (p *xlStorageDiskIDCheck) ReadAll(ctx context.Context, volume string, path string) (buf []byte, err error) {
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ctx, done, err := p.TrackDiskHealth(ctx, storageMetricReadAll, volume, path)
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if err != nil {
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return nil, err
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}
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defer done(&err)
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return p.storage.ReadAll(ctx, volume, path)
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}
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func (p *xlStorageDiskIDCheck) ReadXL(ctx context.Context, volume string, path string, readData bool) (rf RawFileInfo, err error) {
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ctx, done, err := p.TrackDiskHealth(ctx, storageMetricReadXL, volume, path)
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if err != nil {
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return RawFileInfo{}, err
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}
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defer done(&err)
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return p.storage.ReadXL(ctx, volume, path, readData)
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}
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func (p *xlStorageDiskIDCheck) StatInfoFile(ctx context.Context, volume, path string, glob bool) (stat []StatInfo, err error) {
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ctx, done, err := p.TrackDiskHealth(ctx, storageMetricStatInfoFile, volume, path)
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if err != nil {
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return nil, err
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}
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defer done(&err)
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return p.storage.StatInfoFile(ctx, volume, path, glob)
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}
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// ReadMultiple will read multiple files and send each back as response.
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// Files are read and returned in the given order.
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// The resp channel is closed before the call returns.
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// Only a canceled context will return an error.
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func (p *xlStorageDiskIDCheck) ReadMultiple(ctx context.Context, req ReadMultipleReq, resp chan<- ReadMultipleResp) error {
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ctx, done, err := p.TrackDiskHealth(ctx, storageMetricReadMultiple, req.Bucket, req.Prefix)
|
|
if err != nil {
|
|
close(resp)
|
|
return err
|
|
}
|
|
defer done(&err)
|
|
|
|
return p.storage.ReadMultiple(ctx, req, resp)
|
|
}
|
|
|
|
// CleanAbandonedData will read metadata of the object on disk
|
|
// and delete any data directories and inline data that isn't referenced in metadata.
|
|
func (p *xlStorageDiskIDCheck) CleanAbandonedData(ctx context.Context, volume string, path string) error {
|
|
ctx, done, err := p.TrackDiskHealth(ctx, storageMetricDeleteAbandonedParts, volume, path)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer done(&err)
|
|
|
|
return p.storage.CleanAbandonedData(ctx, volume, path)
|
|
}
|
|
|
|
func storageTrace(s storageMetric, startTime time.Time, duration time.Duration, path string, err string) madmin.TraceInfo {
|
|
return madmin.TraceInfo{
|
|
TraceType: madmin.TraceStorage,
|
|
Time: startTime,
|
|
NodeName: globalLocalNodeName,
|
|
FuncName: "storage." + s.String(),
|
|
Duration: duration,
|
|
Path: path,
|
|
Error: err,
|
|
}
|
|
}
|
|
|
|
func scannerTrace(s scannerMetric, startTime time.Time, duration time.Duration, path string) madmin.TraceInfo {
|
|
return madmin.TraceInfo{
|
|
TraceType: madmin.TraceScanner,
|
|
Time: startTime,
|
|
NodeName: globalLocalNodeName,
|
|
FuncName: "scanner." + s.String(),
|
|
Duration: duration,
|
|
Path: path,
|
|
}
|
|
}
|
|
|
|
// Update storage metrics
|
|
func (p *xlStorageDiskIDCheck) updateStorageMetrics(s storageMetric, paths ...string) func(err *error) {
|
|
startTime := time.Now()
|
|
trace := globalTrace.NumSubscribers(madmin.TraceStorage) > 0
|
|
return func(errp *error) {
|
|
duration := time.Since(startTime)
|
|
|
|
atomic.AddUint64(&p.apiCalls[s], 1)
|
|
p.apiLatencies[s].add(duration)
|
|
|
|
if trace {
|
|
var errStr string
|
|
if errp != nil && *errp != nil {
|
|
errStr = (*errp).Error()
|
|
}
|
|
paths = append([]string{p.String()}, paths...)
|
|
globalTrace.Publish(storageTrace(s, startTime, duration, strings.Join(paths, " "), errStr))
|
|
}
|
|
}
|
|
}
|
|
|
|
const (
|
|
diskHealthOK = iota
|
|
diskHealthFaulty
|
|
)
|
|
|
|
// diskMaxConcurrent is the maximum number of running concurrent operations
|
|
// for local and (incoming) remote disk ops respectively.
|
|
var diskMaxConcurrent = 512
|
|
|
|
func init() {
|
|
s := env.Get("_MINIO_DISK_MAX_CONCURRENT", "512")
|
|
diskMaxConcurrent, _ = strconv.Atoi(s)
|
|
if diskMaxConcurrent <= 0 {
|
|
logger.Info("invalid _MINIO_DISK_MAX_CONCURRENT value: %s, defaulting to '512'", s)
|
|
diskMaxConcurrent = 512
|
|
}
|
|
}
|
|
|
|
type diskHealthTracker struct {
|
|
// atomic time of last success
|
|
lastSuccess int64
|
|
|
|
// atomic time of last time a token was grabbed.
|
|
lastStarted int64
|
|
|
|
// Atomic status of disk.
|
|
status int32
|
|
|
|
// Atomic number of requests blocking for a token.
|
|
blocked int32
|
|
|
|
// Concurrency tokens.
|
|
tokens chan struct{}
|
|
}
|
|
|
|
// newDiskHealthTracker creates a new disk health tracker.
|
|
func newDiskHealthTracker() *diskHealthTracker {
|
|
d := diskHealthTracker{
|
|
lastSuccess: time.Now().UnixNano(),
|
|
lastStarted: time.Now().UnixNano(),
|
|
status: diskHealthOK,
|
|
tokens: make(chan struct{}, diskMaxConcurrent),
|
|
}
|
|
for i := 0; i < diskMaxConcurrent; i++ {
|
|
d.tokens <- struct{}{}
|
|
}
|
|
return &d
|
|
}
|
|
|
|
// logSuccess will update the last successful operation time.
|
|
func (d *diskHealthTracker) logSuccess() {
|
|
atomic.StoreInt64(&d.lastSuccess, time.Now().UnixNano())
|
|
}
|
|
|
|
func (d *diskHealthTracker) isFaulty() bool {
|
|
return atomic.LoadInt32(&d.status) == diskHealthFaulty
|
|
}
|
|
|
|
type (
|
|
healthDiskCtxKey struct{}
|
|
healthDiskCtxValue struct {
|
|
lastSuccess *int64
|
|
}
|
|
)
|
|
|
|
// logSuccess will update the last successful operation time.
|
|
func (h *healthDiskCtxValue) logSuccess() {
|
|
atomic.StoreInt64(h.lastSuccess, time.Now().UnixNano())
|
|
}
|
|
|
|
// noopDoneFunc is a no-op done func.
|
|
// Can be reused.
|
|
var noopDoneFunc = func(_ *error) {}
|
|
|
|
// TrackDiskHealth for this request.
|
|
// When a non-nil error is returned 'done' MUST be called
|
|
// with the status of the response, if it corresponds to disk health.
|
|
// If the pointer sent to done is non-nil AND the error
|
|
// is either nil or io.EOF the disk is considered good.
|
|
// So if unsure if the disk status is ok, return nil as a parameter to done.
|
|
// Shadowing will work as long as return error is named: https://go.dev/play/p/sauq86SsTN2
|
|
func (p *xlStorageDiskIDCheck) TrackDiskHealth(ctx context.Context, s storageMetric, paths ...string) (c context.Context, done func(*error), err error) {
|
|
done = noopDoneFunc
|
|
if contextCanceled(ctx) {
|
|
return ctx, done, ctx.Err()
|
|
}
|
|
|
|
// Return early if disk is faulty already.
|
|
if atomic.LoadInt32(&p.health.status) == diskHealthFaulty {
|
|
return ctx, done, errFaultyDisk
|
|
}
|
|
|
|
// Verify if the disk is not stale
|
|
// - missing format.json (unformatted drive)
|
|
// - format.json is valid but invalid 'uuid'
|
|
if err = p.checkDiskStale(); err != nil {
|
|
return ctx, done, err
|
|
}
|
|
|
|
// Disallow recursive tracking to avoid deadlocks.
|
|
if ctx.Value(healthDiskCtxKey{}) != nil {
|
|
done = p.updateStorageMetrics(s, paths...)
|
|
return ctx, done, nil
|
|
}
|
|
|
|
select {
|
|
case <-ctx.Done():
|
|
return ctx, done, ctx.Err()
|
|
case <-p.health.tokens:
|
|
// Fast path, got token.
|
|
default:
|
|
// We ran out of tokens, check health before blocking.
|
|
err = p.waitForToken(ctx)
|
|
if err != nil {
|
|
return ctx, done, err
|
|
}
|
|
}
|
|
// We only progress here if we got a token.
|
|
|
|
atomic.StoreInt64(&p.health.lastStarted, time.Now().UnixNano())
|
|
ctx = context.WithValue(ctx, healthDiskCtxKey{}, &healthDiskCtxValue{lastSuccess: &p.health.lastSuccess})
|
|
si := p.updateStorageMetrics(s, paths...)
|
|
var once sync.Once
|
|
return ctx, func(errp *error) {
|
|
once.Do(func() {
|
|
p.health.tokens <- struct{}{}
|
|
if errp != nil {
|
|
err := *errp
|
|
if err != nil && !errors.Is(err, io.EOF) {
|
|
return
|
|
}
|
|
p.health.logSuccess()
|
|
}
|
|
si(errp)
|
|
})
|
|
}, nil
|
|
}
|
|
|
|
// waitForToken will wait for a token, while periodically
|
|
// checking the disk status.
|
|
// If nil is returned a token was picked up.
|
|
func (p *xlStorageDiskIDCheck) waitForToken(ctx context.Context) (err error) {
|
|
atomic.AddInt32(&p.health.blocked, 1)
|
|
defer func() {
|
|
atomic.AddInt32(&p.health.blocked, -1)
|
|
}()
|
|
// Avoid stampeding herd...
|
|
ticker := time.NewTicker(5*time.Second + time.Duration(rand.Int63n(int64(5*time.Second))))
|
|
defer ticker.Stop()
|
|
for {
|
|
err = p.checkHealth(ctx)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
select {
|
|
case <-ticker.C:
|
|
// Ticker expired, check health again.
|
|
case <-ctx.Done():
|
|
return ctx.Err()
|
|
case <-p.health.tokens:
|
|
return nil
|
|
}
|
|
}
|
|
}
|
|
|
|
// checkHealth should only be called when tokens have run out.
|
|
// This will check if disk should be taken offline.
|
|
func (p *xlStorageDiskIDCheck) checkHealth(ctx context.Context) (err error) {
|
|
if atomic.LoadInt32(&p.health.status) == diskHealthFaulty {
|
|
return errFaultyDisk
|
|
}
|
|
// Check if there are tokens.
|
|
if len(p.health.tokens) > 0 {
|
|
return nil
|
|
}
|
|
|
|
const maxTimeSinceLastSuccess = 30 * time.Second
|
|
const minTimeSinceLastOpStarted = 15 * time.Second
|
|
|
|
// To avoid stampeding herd (100s of simultaneous starting requests)
|
|
// there must be a delay between the last started request and now
|
|
// for the last lastSuccess to be useful.
|
|
t := time.Since(time.Unix(0, atomic.LoadInt64(&p.health.lastStarted)))
|
|
if t < minTimeSinceLastOpStarted {
|
|
return nil
|
|
}
|
|
|
|
// If also more than 15 seconds since last success, take disk offline.
|
|
t = time.Since(time.Unix(0, atomic.LoadInt64(&p.health.lastSuccess)))
|
|
if t > maxTimeSinceLastSuccess {
|
|
if atomic.CompareAndSwapInt32(&p.health.status, diskHealthOK, diskHealthFaulty) {
|
|
logger.LogAlwaysIf(ctx, fmt.Errorf("taking drive %s offline, time since last response %v", p.storage.String(), t.Round(time.Millisecond)))
|
|
go p.monitorDiskStatus()
|
|
}
|
|
return errFaultyDisk
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// monitorDiskStatus should be called once when a drive has been marked offline.
|
|
// Once the disk has been deemed ok, it will return to online status.
|
|
func (p *xlStorageDiskIDCheck) monitorDiskStatus() {
|
|
t := time.NewTicker(5 * time.Second)
|
|
defer t.Stop()
|
|
fn := mustGetUUID()
|
|
for range t.C {
|
|
if len(p.health.tokens) == 0 {
|
|
// Queue is still full, no need to check.
|
|
continue
|
|
}
|
|
err := p.storage.WriteAll(context.Background(), minioMetaTmpBucket, fn, []byte{10000: 42})
|
|
if err != nil {
|
|
continue
|
|
}
|
|
b, err := p.storage.ReadAll(context.Background(), minioMetaTmpBucket, fn)
|
|
if err != nil || len(b) != 10001 {
|
|
continue
|
|
}
|
|
err = p.storage.Delete(context.Background(), minioMetaTmpBucket, fn, DeleteOptions{
|
|
Recursive: false,
|
|
Force: false,
|
|
})
|
|
if err == nil {
|
|
logger.Info("Able to read+write+delete, bringing drive %s online. Drive was offline for %s.", p.storage.String(),
|
|
time.Since(time.Unix(0, atomic.LoadInt64(&p.health.lastSuccess))))
|
|
atomic.StoreInt32(&p.health.status, diskHealthOK)
|
|
return
|
|
}
|
|
}
|
|
}
|
|
|
|
// diskHealthCheckOK will check if the provided error is nil
|
|
// and update disk status if good.
|
|
// For convenience a bool is returned to indicate any error state
|
|
// that is not io.EOF.
|
|
func diskHealthCheckOK(ctx context.Context, err error) bool {
|
|
// Check if context has a disk health check.
|
|
tracker, ok := ctx.Value(healthDiskCtxKey{}).(*healthDiskCtxValue)
|
|
if !ok {
|
|
// No tracker, return
|
|
return err == nil || errors.Is(err, io.EOF)
|
|
}
|
|
if err == nil || errors.Is(err, io.EOF) {
|
|
tracker.logSuccess()
|
|
return true
|
|
}
|
|
return false
|
|
}
|
|
|
|
// diskHealthWrapper provides either a io.Reader or io.Writer
|
|
// that updates status of the provided tracker.
|
|
// Use through diskHealthReader or diskHealthWriter.
|
|
type diskHealthWrapper struct {
|
|
tracker *healthDiskCtxValue
|
|
r io.Reader
|
|
w io.Writer
|
|
}
|
|
|
|
func (d *diskHealthWrapper) Read(p []byte) (int, error) {
|
|
if d.r == nil {
|
|
return 0, fmt.Errorf("diskHealthWrapper: Read with no reader")
|
|
}
|
|
n, err := d.r.Read(p)
|
|
if err == nil || err == io.EOF && n > 0 {
|
|
d.tracker.logSuccess()
|
|
}
|
|
return n, err
|
|
}
|
|
|
|
func (d *diskHealthWrapper) Write(p []byte) (int, error) {
|
|
if d.w == nil {
|
|
return 0, fmt.Errorf("diskHealthWrapper: Write with no writer")
|
|
}
|
|
n, err := d.w.Write(p)
|
|
if err == nil && n == len(p) {
|
|
d.tracker.logSuccess()
|
|
}
|
|
return n, err
|
|
}
|
|
|
|
// diskHealthReader provides a wrapper that will update disk health on
|
|
// ctx, on every successful read.
|
|
// This should only be used directly at the os/syscall level,
|
|
// otherwise buffered operations may return false health checks.
|
|
func diskHealthReader(ctx context.Context, r io.Reader) io.Reader {
|
|
// Check if context has a disk health check.
|
|
tracker, ok := ctx.Value(healthDiskCtxKey{}).(*healthDiskCtxValue)
|
|
if !ok {
|
|
// No need to wrap
|
|
return r
|
|
}
|
|
return &diskHealthWrapper{r: r, tracker: tracker}
|
|
}
|
|
|
|
// diskHealthWriter provides a wrapper that will update disk health on
|
|
// ctx, on every successful write.
|
|
// This should only be used directly at the os/syscall level,
|
|
// otherwise buffered operations may return false health checks.
|
|
func diskHealthWriter(ctx context.Context, w io.Writer) io.Writer {
|
|
// Check if context has a disk health check.
|
|
tracker, ok := ctx.Value(healthDiskCtxKey{}).(*healthDiskCtxValue)
|
|
if !ok {
|
|
// No need to wrap
|
|
return w
|
|
}
|
|
return &diskHealthWrapper{w: w, tracker: tracker}
|
|
}
|