minio/cmd/xl-storage-disk-id-check.go

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// Copyright (c) 2015-2021 MinIO, Inc.
//
// This file is part of MinIO Object Storage stack
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package cmd
import (
"context"
"io"
"strings"
"sync"
"sync/atomic"
"time"
ewma "github.com/VividCortex/ewma"
trace "github.com/minio/minio/pkg/trace"
)
//go:generate stringer -type=storageMetric -trimprefix=storageMetric $GOFILE
type storageMetric uint8
const (
storageMetricMakeVolBulk storageMetric = iota
storageMetricMakeVol
storageMetricListVols
storageMetricStatVol
storageMetricDeleteVol
storageMetricWalkDir
storageMetricListDir
storageMetricReadFile
storageMetricAppendFile
storageMetricCreateFile
storageMetricReadFileStream
storageMetricRenameFile
storageMetricRenameData
storageMetricCheckParts
storageMetricCheckFile
storageMetricDelete
storageMetricDeleteVersions
storageMetricVerifyFile
storageMetricWriteAll
storageMetricDeleteVersion
storageMetricWriteMetadata
storageMetricUpdateMetadata
storageMetricReadVersion
storageMetricReadAll
// .... add more
storageMetricLast
)
// Detects change in underlying disk.
type xlStorageDiskIDCheck struct {
// fields position optimized for memory please
// do not re-order them, if you add new fields
// please use `fieldalignment ./...` to check
// if your changes are not causing any problems.
storage StorageAPI
apiLatencies [storageMetricLast]ewma.MovingAverage
diskID string
apiCalls [storageMetricLast]uint64
}
func (p *xlStorageDiskIDCheck) getMetrics() DiskMetrics {
diskMetric := DiskMetrics{
APILatencies: make(map[string]string),
APICalls: make(map[string]uint64),
}
for i, v := range p.apiLatencies {
diskMetric.APILatencies[storageMetric(i).String()] = time.Duration(v.Value()).String()
}
for i := range p.apiCalls {
diskMetric.APICalls[storageMetric(i).String()] = atomic.LoadUint64(&p.apiCalls[i])
}
return diskMetric
}
type lockedSimpleEWMA struct {
sync.RWMutex
*ewma.SimpleEWMA
}
func (e *lockedSimpleEWMA) Add(value float64) {
e.Lock()
defer e.Unlock()
e.SimpleEWMA.Add(value)
}
func (e *lockedSimpleEWMA) Set(value float64) {
e.Lock()
defer e.Unlock()
e.SimpleEWMA.Set(value)
}
func (e *lockedSimpleEWMA) Value() float64 {
e.RLock()
defer e.RUnlock()
return e.SimpleEWMA.Value()
}
func newXLStorageDiskIDCheck(storage *xlStorage) *xlStorageDiskIDCheck {
xl := xlStorageDiskIDCheck{
storage: storage,
}
for i := range xl.apiLatencies[:] {
xl.apiLatencies[i] = &lockedSimpleEWMA{
SimpleEWMA: new(ewma.SimpleEWMA),
}
}
return &xl
}
func (p *xlStorageDiskIDCheck) String() string {
return p.storage.String()
}
func (p *xlStorageDiskIDCheck) IsOnline() bool {
storedDiskID, err := p.storage.GetDiskID()
if err != nil {
return false
}
return storedDiskID == p.diskID
}
func (p *xlStorageDiskIDCheck) IsLocal() bool {
return p.storage.IsLocal()
}
func (p *xlStorageDiskIDCheck) Endpoint() Endpoint {
return p.storage.Endpoint()
}
func (p *xlStorageDiskIDCheck) Hostname() string {
return p.storage.Hostname()
}
func (p *xlStorageDiskIDCheck) Healing() *healingTracker {
return p.storage.Healing()
}
func (p *xlStorageDiskIDCheck) NSScanner(ctx context.Context, cache dataUsageCache) (dataUsageCache, error) {
select {
case <-ctx.Done():
return dataUsageCache{}, ctx.Err()
default:
}
if err := p.checkDiskStale(); err != nil {
return dataUsageCache{}, err
}
return p.storage.NSScanner(ctx, cache)
}
func (p *xlStorageDiskIDCheck) GetDiskLoc() (poolIdx, setIdx, diskIdx int) {
return p.storage.GetDiskLoc()
}
func (p *xlStorageDiskIDCheck) SetDiskLoc(poolIdx, setIdx, diskIdx int) {
p.storage.SetDiskLoc(poolIdx, setIdx, diskIdx)
}
func (p *xlStorageDiskIDCheck) Close() error {
return p.storage.Close()
}
func (p *xlStorageDiskIDCheck) GetDiskID() (string, error) {
return p.storage.GetDiskID()
}
func (p *xlStorageDiskIDCheck) SetDiskID(id string) {
p.diskID = id
}
func (p *xlStorageDiskIDCheck) checkDiskStale() error {
if p.diskID == "" {
// For empty disk-id we allow the call as the server might be
// coming up and trying to read format.json or create format.json
return nil
}
storedDiskID, err := p.storage.GetDiskID()
if err != nil {
// return any error generated while reading `format.json`
return err
}
if err == nil && p.diskID == storedDiskID {
return nil
}
// not the same disk we remember, take it offline.
return errDiskNotFound
}
func (p *xlStorageDiskIDCheck) DiskInfo(ctx context.Context) (info DiskInfo, err error) {
select {
case <-ctx.Done():
return DiskInfo{}, ctx.Err()
default:
}
info, err = p.storage.DiskInfo(ctx)
if err != nil {
return info, err
}
info.Metrics = p.getMetrics()
// check cached diskID against backend
// only if its non-empty.
if p.diskID != "" {
if p.diskID != info.ID {
return info, errDiskNotFound
}
}
return info, nil
}
func (p *xlStorageDiskIDCheck) MakeVolBulk(ctx context.Context, volumes ...string) (err error) {
defer p.updateStorageMetrics(storageMetricMakeVolBulk, volumes...)()
select {
case <-ctx.Done():
return ctx.Err()
default:
}
if err = p.checkDiskStale(); err != nil {
return err
}
return p.storage.MakeVolBulk(ctx, volumes...)
}
func (p *xlStorageDiskIDCheck) MakeVol(ctx context.Context, volume string) (err error) {
defer p.updateStorageMetrics(storageMetricMakeVol, volume)()
select {
case <-ctx.Done():
return ctx.Err()
default:
}
if err = p.checkDiskStale(); err != nil {
return err
}
return p.storage.MakeVol(ctx, volume)
}
func (p *xlStorageDiskIDCheck) ListVols(ctx context.Context) ([]VolInfo, error) {
defer p.updateStorageMetrics(storageMetricListVols, "/")()
select {
case <-ctx.Done():
return nil, ctx.Err()
default:
}
if err := p.checkDiskStale(); err != nil {
return nil, err
}
return p.storage.ListVols(ctx)
}
func (p *xlStorageDiskIDCheck) StatVol(ctx context.Context, volume string) (vol VolInfo, err error) {
defer p.updateStorageMetrics(storageMetricStatVol, volume)()
select {
case <-ctx.Done():
return VolInfo{}, ctx.Err()
default:
}
if err = p.checkDiskStale(); err != nil {
return vol, err
}
return p.storage.StatVol(ctx, volume)
}
func (p *xlStorageDiskIDCheck) DeleteVol(ctx context.Context, volume string, forceDelete bool) (err error) {
defer p.updateStorageMetrics(storageMetricDeleteVol, volume)()
select {
case <-ctx.Done():
return ctx.Err()
default:
}
if err = p.checkDiskStale(); err != nil {
return err
}
return p.storage.DeleteVol(ctx, volume, forceDelete)
}
func (p *xlStorageDiskIDCheck) ListDir(ctx context.Context, volume, dirPath string, count int) ([]string, error) {
defer p.updateStorageMetrics(storageMetricListDir, volume, dirPath)()
select {
case <-ctx.Done():
return nil, ctx.Err()
default:
}
if err := p.checkDiskStale(); err != nil {
return nil, err
}
return p.storage.ListDir(ctx, volume, dirPath, count)
}
func (p *xlStorageDiskIDCheck) ReadFile(ctx context.Context, volume string, path string, offset int64, buf []byte, verifier *BitrotVerifier) (n int64, err error) {
defer p.updateStorageMetrics(storageMetricReadFile, volume, path)()
select {
case <-ctx.Done():
return 0, ctx.Err()
default:
}
if err := p.checkDiskStale(); err != nil {
return 0, err
}
return p.storage.ReadFile(ctx, volume, path, offset, buf, verifier)
}
func (p *xlStorageDiskIDCheck) AppendFile(ctx context.Context, volume string, path string, buf []byte) (err error) {
defer p.updateStorageMetrics(storageMetricAppendFile, volume, path)()
select {
case <-ctx.Done():
return ctx.Err()
default:
}
if err = p.checkDiskStale(); err != nil {
return err
}
return p.storage.AppendFile(ctx, volume, path, buf)
}
func (p *xlStorageDiskIDCheck) CreateFile(ctx context.Context, volume, path string, size int64, reader io.Reader) error {
defer p.updateStorageMetrics(storageMetricCreateFile, volume, path)()
select {
case <-ctx.Done():
return ctx.Err()
default:
}
if err := p.checkDiskStale(); err != nil {
return err
}
return p.storage.CreateFile(ctx, volume, path, size, reader)
}
func (p *xlStorageDiskIDCheck) ReadFileStream(ctx context.Context, volume, path string, offset, length int64) (io.ReadCloser, error) {
defer p.updateStorageMetrics(storageMetricReadFileStream, volume, path)()
select {
case <-ctx.Done():
return nil, ctx.Err()
default:
}
if err := p.checkDiskStale(); err != nil {
return nil, err
}
return p.storage.ReadFileStream(ctx, volume, path, offset, length)
}
func (p *xlStorageDiskIDCheck) RenameFile(ctx context.Context, srcVolume, srcPath, dstVolume, dstPath string) error {
defer p.updateStorageMetrics(storageMetricRenameFile, srcVolume, srcPath, dstVolume, dstPath)()
select {
case <-ctx.Done():
return ctx.Err()
default:
}
if err := p.checkDiskStale(); err != nil {
return err
}
return p.storage.RenameFile(ctx, srcVolume, srcPath, dstVolume, dstPath)
}
func (p *xlStorageDiskIDCheck) RenameData(ctx context.Context, srcVolume, srcPath string, fi FileInfo, dstVolume, dstPath string) error {
defer p.updateStorageMetrics(storageMetricRenameData, srcPath, fi.DataDir, dstVolume, dstPath)()
select {
case <-ctx.Done():
return ctx.Err()
default:
}
if err := p.checkDiskStale(); err != nil {
return err
}
return p.storage.RenameData(ctx, srcVolume, srcPath, fi, dstVolume, dstPath)
}
func (p *xlStorageDiskIDCheck) CheckParts(ctx context.Context, volume string, path string, fi FileInfo) (err error) {
defer p.updateStorageMetrics(storageMetricCheckParts, volume, path)()
select {
case <-ctx.Done():
return ctx.Err()
default:
}
if err = p.checkDiskStale(); err != nil {
return err
}
return p.storage.CheckParts(ctx, volume, path, fi)
}
func (p *xlStorageDiskIDCheck) CheckFile(ctx context.Context, volume string, path string) (err error) {
defer p.updateStorageMetrics(storageMetricCheckFile, volume, path)()
select {
case <-ctx.Done():
return ctx.Err()
default:
}
if err = p.checkDiskStale(); err != nil {
return err
}
return p.storage.CheckFile(ctx, volume, path)
}
func (p *xlStorageDiskIDCheck) Delete(ctx context.Context, volume string, path string, recursive bool) (err error) {
defer p.updateStorageMetrics(storageMetricDelete, volume, path)()
select {
case <-ctx.Done():
return ctx.Err()
default:
}
if err = p.checkDiskStale(); err != nil {
return err
}
return p.storage.Delete(ctx, volume, path, recursive)
}
// DeleteVersions deletes slice of versions, it can be same object
// or multiple objects.
func (p *xlStorageDiskIDCheck) DeleteVersions(ctx context.Context, volume string, versions []FileInfo) (errs []error) {
// Mererly for tracing storage
path := ""
if len(versions) > 0 {
path = versions[0].Name
}
defer p.updateStorageMetrics(storageMetricDeleteVersions, volume, path)()
errs = make([]error, len(versions))
select {
case <-ctx.Done():
for i := range errs {
errs[i] = ctx.Err()
}
return errs
default:
}
if err := p.checkDiskStale(); err != nil {
for i := range errs {
errs[i] = err
}
return errs
}
return p.storage.DeleteVersions(ctx, volume, versions)
}
func (p *xlStorageDiskIDCheck) VerifyFile(ctx context.Context, volume, path string, fi FileInfo) error {
defer p.updateStorageMetrics(storageMetricVerifyFile, volume, path)()
select {
case <-ctx.Done():
return ctx.Err()
default:
}
if err := p.checkDiskStale(); err != nil {
return err
}
return p.storage.VerifyFile(ctx, volume, path, fi)
}
func (p *xlStorageDiskIDCheck) WriteAll(ctx context.Context, volume string, path string, b []byte) (err error) {
defer p.updateStorageMetrics(storageMetricWriteAll, volume, path)()
select {
case <-ctx.Done():
return ctx.Err()
default:
}
if err = p.checkDiskStale(); err != nil {
return err
}
return p.storage.WriteAll(ctx, volume, path, b)
}
func (p *xlStorageDiskIDCheck) DeleteVersion(ctx context.Context, volume, path string, fi FileInfo, forceDelMarker bool) (err error) {
defer p.updateStorageMetrics(storageMetricDeleteVersion, volume, path)()
select {
case <-ctx.Done():
return ctx.Err()
default:
}
if err = p.checkDiskStale(); err != nil {
return err
}
return p.storage.DeleteVersion(ctx, volume, path, fi, forceDelMarker)
}
func (p *xlStorageDiskIDCheck) UpdateMetadata(ctx context.Context, volume, path string, fi FileInfo) (err error) {
defer p.updateStorageMetrics(storageMetricUpdateMetadata, volume, path)()
select {
case <-ctx.Done():
return ctx.Err()
default:
}
if err = p.checkDiskStale(); err != nil {
return err
}
return p.storage.UpdateMetadata(ctx, volume, path, fi)
}
func (p *xlStorageDiskIDCheck) WriteMetadata(ctx context.Context, volume, path string, fi FileInfo) (err error) {
defer p.updateStorageMetrics(storageMetricWriteMetadata, volume, path)()
select {
case <-ctx.Done():
return ctx.Err()
default:
}
if err = p.checkDiskStale(); err != nil {
return err
}
return p.storage.WriteMetadata(ctx, volume, path, fi)
}
func (p *xlStorageDiskIDCheck) ReadVersion(ctx context.Context, volume, path, versionID string, readData bool) (fi FileInfo, err error) {
defer p.updateStorageMetrics(storageMetricReadVersion, volume, path)()
select {
case <-ctx.Done():
return fi, ctx.Err()
default:
}
if err = p.checkDiskStale(); err != nil {
return fi, err
}
return p.storage.ReadVersion(ctx, volume, path, versionID, readData)
}
func (p *xlStorageDiskIDCheck) ReadAll(ctx context.Context, volume string, path string) (buf []byte, err error) {
defer p.updateStorageMetrics(storageMetricReadAll, volume, path)()
select {
case <-ctx.Done():
return nil, ctx.Err()
default:
}
if err = p.checkDiskStale(); err != nil {
return nil, err
}
return p.storage.ReadAll(ctx, volume, path)
}
func storageTrace(s storageMetric, startTime time.Time, duration time.Duration, path string) trace.Info {
return trace.Info{
TraceType: trace.Storage,
Time: startTime,
NodeName: globalLocalNodeName,
FuncName: "storage." + s.String(),
StorageStats: trace.StorageStats{
Duration: duration,
Path: path,
},
}
}
// Update storage metrics
func (p *xlStorageDiskIDCheck) updateStorageMetrics(s storageMetric, paths ...string) func() {
startTime := time.Now()
trace := globalTrace.NumSubscribers() > 0
return func() {
duration := time.Since(startTime)
atomic.AddUint64(&p.apiCalls[s], 1)
p.apiLatencies[s].Add(float64(duration))
if trace {
globalTrace.Publish(storageTrace(s, startTime, duration, strings.Join(paths, " ")))
}
}
}