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minio/cmd/xl-v1-healing_test.go

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/*
* MinIO Cloud Storage, (C) 2016, 2017 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 (
"bytes"
"context"
"path/filepath"
"testing"
"github.com/minio/minio/pkg/madmin"
)
// Tests undoes and validates if the undoing completes successfully.
func TestUndoMakeBucket(t *testing.T) {
nDisks := 16
fsDirs, err := getRandomDisks(nDisks)
if err != nil {
t.Fatal(err)
}
defer removeRoots(fsDirs)
// Remove format.json on 16 disks.
obj, _, err := initObjectLayer(mustGetZoneEndpoints(fsDirs...))
if err != nil {
t.Fatal(err)
}
bucketName := getRandomBucketName()
if err = obj.MakeBucketWithLocation(context.Background(), bucketName, ""); err != nil {
t.Fatal(err)
}
z := obj.(*xlZones)
xl := z.zones[0].sets[0]
undoMakeBucket(xl.getDisks(), bucketName)
// Validate if bucket was deleted properly.
_, err = obj.GetBucketInfo(context.Background(), bucketName)
if err != nil {
switch err.(type) {
case BucketNotFound:
default:
t.Fatal(err)
}
}
}
func TestHealObjectCorrupted(t *testing.T) {
resetGlobalHealState()
defer resetGlobalHealState()
nDisks := 16
fsDirs, err := getRandomDisks(nDisks)
if err != nil {
t.Fatal(err)
}
defer removeRoots(fsDirs)
// Everything is fine, should return nil
objLayer, _, err := initObjectLayer(mustGetZoneEndpoints(fsDirs...))
if err != nil {
t.Fatal(err)
}
bucket := "bucket"
object := "object"
data := bytes.Repeat([]byte("a"), 5*1024*1024)
var opts ObjectOptions
err = objLayer.MakeBucketWithLocation(context.Background(), bucket, "")
if err != nil {
t.Fatalf("Failed to make a bucket - %v", err)
}
// Create an object with multiple parts uploaded in decreasing
// part number.
uploadID, err := objLayer.NewMultipartUpload(context.Background(), bucket, object, opts)
if err != nil {
t.Fatalf("Failed to create a multipart upload - %v", err)
}
var uploadedParts []CompletePart
for _, partID := range []int{2, 1} {
pInfo, err1 := objLayer.PutObjectPart(context.Background(), bucket, object, uploadID, partID, mustGetPutObjReader(t, bytes.NewReader(data), int64(len(data)), "", ""), opts)
if err1 != nil {
t.Fatalf("Failed to upload a part - %v", err1)
}
uploadedParts = append(uploadedParts, CompletePart{
PartNumber: pInfo.PartNumber,
ETag: pInfo.ETag,
})
}
_, err = objLayer.CompleteMultipartUpload(context.Background(), bucket, object, uploadID, uploadedParts, ObjectOptions{})
if err != nil {
t.Fatalf("Failed to complete multipart upload - %v", err)
}
// Test 1: Remove the object backend files from the first disk.
z := objLayer.(*xlZones)
xl := z.zones[0].sets[0]
firstDisk := xl.getDisks()[0]
err = firstDisk.DeleteFile(bucket, filepath.Join(object, xlMetaJSONFile))
if err != nil {
t.Fatalf("Failed to delete a file - %v", err)
}
_, err = objLayer.HealObject(context.Background(), bucket, object, madmin.HealOpts{ScanMode: madmin.HealNormalScan})
if err != nil {
t.Fatalf("Failed to heal object - %v", err)
}
_, err = firstDisk.StatFile(bucket, filepath.Join(object, xlMetaJSONFile))
if err != nil {
t.Errorf("Expected xl.json file to be present but stat failed - %v", err)
}
// Test 2: Heal when part.1 is empty
partSt1, err := firstDisk.StatFile(bucket, filepath.Join(object, "part.1"))
if err != nil {
t.Errorf("Expected part.1 file to be present but stat failed - %v", err)
}
err = firstDisk.DeleteFile(bucket, filepath.Join(object, "part.1"))
if err != nil {
t.Errorf("Failure during deleting part.1 - %v", err)
}
err = firstDisk.WriteAll(bucket, filepath.Join(object, "part.1"), bytes.NewReader([]byte{}))
if err != nil {
t.Errorf("Failure during creating part.1 - %v", err)
}
_, err = objLayer.HealObject(context.Background(), bucket, object, madmin.HealOpts{DryRun: false, Remove: true, ScanMode: madmin.HealDeepScan})
if err != nil {
t.Errorf("Expected nil but received %v", err)
}
partSt2, err := firstDisk.StatFile(bucket, filepath.Join(object, "part.1"))
if err != nil {
t.Errorf("Expected from part.1 file to be present but stat failed - %v", err)
}
if partSt1.Size != partSt2.Size {
t.Errorf("part.1 file size is not the same before and after heal")
}
// Test 3: Heal when part.1 is correct in size but corrupted
partSt1, err = firstDisk.StatFile(bucket, filepath.Join(object, "part.1"))
if err != nil {
t.Errorf("Expected part.1 file to be present but stat failed - %v", err)
}
err = firstDisk.DeleteFile(bucket, filepath.Join(object, "part.1"))
if err != nil {
t.Errorf("Failure during deleting part.1 - %v", err)
}
bdata := bytes.Repeat([]byte("b"), int(partSt1.Size))
err = firstDisk.WriteAll(bucket, filepath.Join(object, "part.1"), bytes.NewReader(bdata))
if err != nil {
t.Errorf("Failure during creating part.1 - %v", err)
}
_, err = objLayer.HealObject(context.Background(), bucket, object, madmin.HealOpts{DryRun: false, Remove: true, ScanMode: madmin.HealDeepScan})
if err != nil {
t.Errorf("Expected nil but received %v", err)
}
partSt2, err = firstDisk.StatFile(bucket, filepath.Join(object, "part.1"))
if err != nil {
t.Errorf("Expected from part.1 file to be present but stat failed - %v", err)
}
if partSt1.Size != partSt2.Size {
t.Errorf("part.1 file size is not the same before and after heal")
}
// Test 4: checks if HealObject returns an error when xl.json is not found
// in more than read quorum number of disks, to create a corrupted situation.
for i := 0; i <= len(xl.getDisks())/2; i++ {
xl.getDisks()[i].DeleteFile(bucket, filepath.Join(object, xlMetaJSONFile))
}
// Try healing now, expect to receive errFileNotFound.
_, err = objLayer.HealObject(context.Background(), bucket, object, madmin.HealOpts{DryRun: false, Remove: true, ScanMode: madmin.HealDeepScan})
if err != nil {
if _, ok := err.(ObjectNotFound); !ok {
t.Errorf("Expect %v but received %v", ObjectNotFound{Bucket: bucket, Object: object}, err)
}
}
// since majority of xl.jsons are not available, object should be successfully deleted.
_, err = objLayer.GetObjectInfo(context.Background(), bucket, object, ObjectOptions{})
if _, ok := err.(ObjectNotFound); !ok {
t.Errorf("Expect %v but received %v", ObjectNotFound{Bucket: bucket, Object: object}, err)
}
}
// Tests healing of object.
func TestHealObjectXL(t *testing.T) {
nDisks := 16
fsDirs, err := getRandomDisks(nDisks)
if err != nil {
t.Fatal(err)
}
defer removeRoots(fsDirs)
// Everything is fine, should return nil
obj, _, err := initObjectLayer(mustGetZoneEndpoints(fsDirs...))
if err != nil {
t.Fatal(err)
}
bucket := "bucket"
object := "object"
data := bytes.Repeat([]byte("a"), 5*1024*1024)
var opts ObjectOptions
err = obj.MakeBucketWithLocation(context.Background(), bucket, "")
if err != nil {
t.Fatalf("Failed to make a bucket - %v", err)
}
// Create an object with multiple parts uploaded in decreasing
// part number.
uploadID, err := obj.NewMultipartUpload(context.Background(), bucket, object, opts)
if err != nil {
t.Fatalf("Failed to create a multipart upload - %v", err)
}
var uploadedParts []CompletePart
for _, partID := range []int{2, 1} {
pInfo, err1 := obj.PutObjectPart(context.Background(), bucket, object, uploadID, partID, mustGetPutObjReader(t, bytes.NewReader(data), int64(len(data)), "", ""), opts)
if err1 != nil {
t.Fatalf("Failed to upload a part - %v", err1)
}
uploadedParts = append(uploadedParts, CompletePart{
PartNumber: pInfo.PartNumber,
ETag: pInfo.ETag,
})
}
_, err = obj.CompleteMultipartUpload(context.Background(), bucket, object, uploadID, uploadedParts, ObjectOptions{})
if err != nil {
t.Fatalf("Failed to complete multipart upload - %v", err)
}
// Remove the object backend files from the first disk.
z := obj.(*xlZones)
xl := z.zones[0].sets[0]
firstDisk := xl.getDisks()[0]
err = firstDisk.DeleteFile(bucket, filepath.Join(object, xlMetaJSONFile))
if err != nil {
t.Fatalf("Failed to delete a file - %v", err)
}
_, err = obj.HealObject(context.Background(), bucket, object, madmin.HealOpts{ScanMode: madmin.HealNormalScan})
if err != nil {
t.Fatalf("Failed to heal object - %v", err)
}
_, err = firstDisk.StatFile(bucket, filepath.Join(object, xlMetaJSONFile))
if err != nil {
t.Errorf("Expected xl.json file to be present but stat failed - %v", err)
}
xlDisks := xl.getDisks()
z.zones[0].xlDisksMu.Lock()
xl.getDisks = func() []StorageAPI {
// Nil more than half the disks, to remove write quorum.
for i := 0; i <= len(xlDisks)/2; i++ {
xlDisks[i] = nil
}
return xlDisks
}
z.zones[0].xlDisksMu.Unlock()
// Try healing now, expect to receive errDiskNotFound.
_, err = obj.HealObject(context.Background(), bucket, object, madmin.HealOpts{ScanMode: madmin.HealDeepScan})
// since majority of xl.jsons are not available, object quorum can't be read properly and error will be errXLReadQuorum
if _, ok := err.(InsufficientReadQuorum); !ok {
t.Errorf("Expected %v but received %v", InsufficientReadQuorum{}, err)
}
}
// Tests healing of empty directories
func TestHealEmptyDirectoryXL(t *testing.T) {
nDisks := 16
fsDirs, err := getRandomDisks(nDisks)
if err != nil {
t.Fatal(err)
}
defer removeRoots(fsDirs)
// Everything is fine, should return nil
obj, _, err := initObjectLayer(mustGetZoneEndpoints(fsDirs...))
if err != nil {
t.Fatal(err)
}
bucket := "bucket"
object := "empty-dir/"
var opts ObjectOptions
err = obj.MakeBucketWithLocation(context.Background(), bucket, "")
if err != nil {
t.Fatalf("Failed to make a bucket - %v", err)
}
// Upload an empty directory
_, err = obj.PutObject(context.Background(), bucket, object, mustGetPutObjReader(t,
bytes.NewReader([]byte{}), 0, "", ""), opts)
if err != nil {
t.Fatal(err)
}
// Remove the object backend files from the first disk.
z := obj.(*xlZones)
xl := z.zones[0].sets[0]
firstDisk := xl.getDisks()[0]
err = firstDisk.DeleteFile(bucket, object)
if err != nil {
t.Fatalf("Failed to delete a file - %v", err)
}
// Heal the object
hr, err := obj.HealObject(context.Background(), bucket, object, madmin.HealOpts{ScanMode: madmin.HealNormalScan})
if err != nil {
t.Fatalf("Failed to heal object - %v", err)
}
// Check if the empty directory is restored in the first disk
_, err = firstDisk.StatVol(pathJoin(bucket, object))
if err != nil {
t.Fatalf("Expected object to be present but stat failed - %v", err)
}
// Check the state of the object in the first disk (should be missing)
if hr.Before.Drives[0].State != madmin.DriveStateMissing {
t.Fatalf("Unexpected drive state: %v", hr.Before.Drives[0].State)
}
// Check the state of all other disks (should be ok)
for i, h := range append(hr.Before.Drives[1:], hr.After.Drives...) {
if h.State != madmin.DriveStateOk {
t.Fatalf("Unexpected drive state (%d): %v", i+1, h.State)
}
}
// Heal the same object again
hr, err = obj.HealObject(context.Background(), bucket, object, madmin.HealOpts{ScanMode: madmin.HealNormalScan})
if err != nil {
t.Fatalf("Failed to heal object - %v", err)
}
// Check that Before & After states are all okay
for i, h := range append(hr.Before.Drives, hr.After.Drives...) {
if h.State != madmin.DriveStateOk {
t.Fatalf("Unexpected drive state (%d): %v", i+1, h.State)
}
}
}