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362 lines
10 KiB
362 lines
10 KiB
/*
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* MinIO Cloud Storage, (C) 2016-2020 MinIO, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package cmd
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import (
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"bytes"
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"context"
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"fmt"
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"os"
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"path/filepath"
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"testing"
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"time"
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"github.com/minio/minio/pkg/madmin"
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)
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// validates functionality provided to find most common
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// time occurrence from a list of time.
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func TestCommonTime(t *testing.T) {
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// List of test cases for common modTime.
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testCases := []struct {
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times []time.Time
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time time.Time
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}{
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{
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// 1. Tests common times when slice has varying time elements.
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[]time.Time{
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time.Unix(0, 1).UTC(),
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time.Unix(0, 2).UTC(),
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time.Unix(0, 3).UTC(),
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time.Unix(0, 3).UTC(),
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time.Unix(0, 2).UTC(),
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time.Unix(0, 3).UTC(),
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time.Unix(0, 1).UTC(),
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}, time.Unix(0, 3).UTC(),
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},
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{
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// 2. Tests common time obtained when all elements are equal.
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[]time.Time{
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time.Unix(0, 3).UTC(),
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time.Unix(0, 3).UTC(),
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time.Unix(0, 3).UTC(),
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time.Unix(0, 3).UTC(),
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time.Unix(0, 3).UTC(),
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time.Unix(0, 3).UTC(),
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time.Unix(0, 3).UTC(),
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}, time.Unix(0, 3).UTC(),
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},
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{
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// 3. Tests common time obtained when elements have a mixture
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// of sentinel values.
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[]time.Time{
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time.Unix(0, 3).UTC(),
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time.Unix(0, 3).UTC(),
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time.Unix(0, 2).UTC(),
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time.Unix(0, 1).UTC(),
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time.Unix(0, 3).UTC(),
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time.Unix(0, 4).UTC(),
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time.Unix(0, 3).UTC(),
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timeSentinel,
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timeSentinel,
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timeSentinel,
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}, time.Unix(0, 3).UTC(),
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},
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}
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// Tests all the testcases, and validates them against expected
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// common modtime. Tests fail if modtime does not match.
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for i, testCase := range testCases {
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// Obtain a common mod time from modTimes slice.
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ctime, _ := commonTime(testCase.times)
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if !testCase.time.Equal(ctime) {
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t.Fatalf("Test case %d, expect to pass but failed. Wanted modTime: %s, got modTime: %s\n", i+1, testCase.time, ctime)
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}
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}
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}
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// TestListOnlineDisks - checks if listOnlineDisks and outDatedDisks
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// are consistent with each other.
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func TestListOnlineDisks(t *testing.T) {
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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obj, disks, err := prepareErasure16(ctx)
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if err != nil {
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t.Fatalf("Prepare Erasure backend failed - %v", err)
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}
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defer removeRoots(disks)
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type tamperKind int
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const (
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noTamper tamperKind = iota
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deletePart tamperKind = iota
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corruptPart tamperKind = iota
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)
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threeNanoSecs := time.Unix(0, 3).UTC()
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fourNanoSecs := time.Unix(0, 4).UTC()
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modTimesThreeNone := []time.Time{
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threeNanoSecs, threeNanoSecs, threeNanoSecs, threeNanoSecs,
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threeNanoSecs, threeNanoSecs, threeNanoSecs,
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timeSentinel, timeSentinel, timeSentinel, timeSentinel,
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timeSentinel, timeSentinel, timeSentinel, timeSentinel,
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timeSentinel,
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}
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modTimesThreeFour := []time.Time{
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threeNanoSecs, threeNanoSecs, threeNanoSecs, threeNanoSecs,
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threeNanoSecs, threeNanoSecs, threeNanoSecs, threeNanoSecs,
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fourNanoSecs, fourNanoSecs, fourNanoSecs, fourNanoSecs,
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fourNanoSecs, fourNanoSecs, fourNanoSecs, fourNanoSecs,
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}
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testCases := []struct {
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modTimes []time.Time
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expectedTime time.Time
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errs []error
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_tamperBackend tamperKind
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}{
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{
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modTimes: modTimesThreeFour,
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expectedTime: fourNanoSecs,
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errs: []error{
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nil, nil, nil, nil, nil, nil, nil, nil, nil,
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nil, nil, nil, nil, nil, nil, nil,
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},
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_tamperBackend: noTamper,
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},
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{
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modTimes: modTimesThreeNone,
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expectedTime: threeNanoSecs,
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errs: []error{
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// Disks that have a valid xl.meta.
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nil, nil, nil, nil, nil, nil, nil,
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// Majority of disks don't have xl.meta.
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errFileNotFound, errFileNotFound,
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errFileNotFound, errFileNotFound,
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errFileNotFound, errDiskAccessDenied,
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errDiskNotFound, errFileNotFound,
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errFileNotFound,
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},
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_tamperBackend: deletePart,
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},
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{
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modTimes: modTimesThreeNone,
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expectedTime: threeNanoSecs,
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errs: []error{
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// Disks that have a valid xl.meta.
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nil, nil, nil, nil, nil, nil, nil,
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// Majority of disks don't have xl.meta.
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errFileNotFound, errFileNotFound,
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errFileNotFound, errFileNotFound,
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errFileNotFound, errDiskAccessDenied,
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errDiskNotFound, errFileNotFound,
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errFileNotFound,
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},
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_tamperBackend: corruptPart,
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},
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}
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bucket := "bucket"
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err = obj.MakeBucketWithLocation(ctx, "bucket", BucketOptions{})
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if err != nil {
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t.Fatalf("Failed to make a bucket %v", err)
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}
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object := "object"
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data := bytes.Repeat([]byte("a"), 1024)
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z := obj.(*erasureZones)
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erasureDisks := z.zones[0].sets[0].getDisks()
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for i, test := range testCases {
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_, err = obj.PutObject(ctx, bucket, object, mustGetPutObjReader(t, bytes.NewReader(data), int64(len(data)), "", ""), ObjectOptions{})
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if err != nil {
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t.Fatalf("Failed to putObject %v", err)
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}
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partsMetadata, errs := readAllFileInfo(ctx, erasureDisks, bucket, object, "")
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fi, err := getLatestFileInfo(ctx, partsMetadata, errs)
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if err != nil {
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t.Fatalf("Failed to getLatestFileInfo %v", err)
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}
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for j := range partsMetadata {
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if errs[j] != nil {
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t.Fatalf("Test %d: expected error to be nil: %s", i+1, errs[j])
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}
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partsMetadata[j].ModTime = test.modTimes[j]
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}
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tamperedIndex := -1
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switch test._tamperBackend {
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case deletePart:
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for index, err := range test.errs {
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if err != nil {
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continue
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}
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// Remove a part from a disk
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// which has a valid xl.meta,
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// and check if that disk
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// appears in outDatedDisks.
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tamperedIndex = index
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dErr := erasureDisks[index].DeleteFile(context.Background(), bucket, pathJoin(object, fi.DataDir, "part.1"))
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if dErr != nil {
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t.Fatalf("Test %d: Failed to delete %s - %v", i+1,
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filepath.Join(object, "part.1"), dErr)
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}
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break
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}
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case corruptPart:
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for index, err := range test.errs {
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if err != nil {
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continue
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}
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// Corrupt a part from a disk
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// which has a valid xl.meta,
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// and check if that disk
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// appears in outDatedDisks.
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tamperedIndex = index
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filePath := pathJoin(erasureDisks[index].String(), bucket, object, fi.DataDir, "part.1")
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f, err := os.OpenFile(filePath, os.O_WRONLY|os.O_SYNC, 0)
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if err != nil {
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t.Fatalf("Failed to open %s: %s\n", filePath, err)
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}
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f.Write([]byte("oops")) // Will cause bitrot error
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f.Close()
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break
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}
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}
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onlineDisks, modTime := listOnlineDisks(erasureDisks, partsMetadata, test.errs)
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if !modTime.Equal(test.expectedTime) {
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t.Fatalf("Test %d: Expected modTime to be equal to %v but was found to be %v",
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i+1, test.expectedTime, modTime)
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}
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availableDisks, newErrs := disksWithAllParts(ctx, onlineDisks, partsMetadata, test.errs, bucket, object, madmin.HealDeepScan)
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test.errs = newErrs
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if test._tamperBackend != noTamper {
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if tamperedIndex != -1 && availableDisks[tamperedIndex] != nil {
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t.Fatalf("Test %d: disk (%v) with part.1 missing is not a disk with available data",
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i+1, erasureDisks[tamperedIndex])
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}
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}
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}
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}
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func TestDisksWithAllParts(t *testing.T) {
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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obj, disks, err := prepareErasure16(ctx)
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if err != nil {
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t.Fatalf("Prepare Erasure backend failed - %v", err)
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}
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defer removeRoots(disks)
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bucket := "bucket"
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object := "object"
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// make data with more than one part
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partCount := 3
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data := bytes.Repeat([]byte("a"), 6*1024*1024*partCount)
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z := obj.(*erasureZones)
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s := z.zones[0].sets[0]
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erasureDisks := s.getDisks()
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err = obj.MakeBucketWithLocation(ctx, "bucket", BucketOptions{})
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if err != nil {
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t.Fatalf("Failed to make a bucket %v", err)
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}
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_, err = obj.PutObject(ctx, bucket, object, mustGetPutObjReader(t, bytes.NewReader(data), int64(len(data)), "", ""), ObjectOptions{})
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if err != nil {
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t.Fatalf("Failed to putObject %v", err)
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}
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_, errs := readAllFileInfo(ctx, erasureDisks, bucket, object, "")
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readQuorum := len(erasureDisks) / 2
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if reducedErr := reduceReadQuorumErrs(ctx, errs, objectOpIgnoredErrs, readQuorum); reducedErr != nil {
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t.Fatalf("Failed to read xl meta data %v", reducedErr)
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}
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// Test that all disks are returned without any failures with
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// unmodified meta data
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partsMetadata, errs := readAllFileInfo(ctx, erasureDisks, bucket, object, "")
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if err != nil {
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t.Fatalf("Failed to read xl meta data %v", err)
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}
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filteredDisks, errs := disksWithAllParts(ctx, erasureDisks, partsMetadata, errs, bucket, object, madmin.HealDeepScan)
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if len(filteredDisks) != len(erasureDisks) {
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t.Errorf("Unexpected number of disks: %d", len(filteredDisks))
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}
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for diskIndex, disk := range filteredDisks {
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if errs[diskIndex] != nil {
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t.Errorf("Unexpected error %s", errs[diskIndex])
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}
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if disk == nil {
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t.Errorf("Disk erroneously filtered, diskIndex: %d", diskIndex)
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}
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}
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diskFailures := make(map[int]string)
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// key = disk index, value = part name with hash mismatch
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diskFailures[0] = "part.1"
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diskFailures[3] = "part.1"
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diskFailures[15] = "part.1"
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for diskIndex, partName := range diskFailures {
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for i := range partsMetadata[diskIndex].Erasure.Checksums {
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if fmt.Sprintf("part.%d", i+1) == partName {
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filePath := pathJoin(erasureDisks[diskIndex].String(), bucket, object, partsMetadata[diskIndex].DataDir, partName)
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f, err := os.OpenFile(filePath, os.O_WRONLY|os.O_SYNC, 0)
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if err != nil {
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t.Fatalf("Failed to open %s: %s\n", filePath, err)
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}
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f.Write([]byte("oops")) // Will cause bitrot error
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f.Close()
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}
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}
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}
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errs = make([]error, len(erasureDisks))
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filteredDisks, errs = disksWithAllParts(ctx, erasureDisks, partsMetadata, errs, bucket, object, madmin.HealDeepScan)
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if len(filteredDisks) != len(erasureDisks) {
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t.Errorf("Unexpected number of disks: %d", len(filteredDisks))
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}
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for diskIndex, disk := range filteredDisks {
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if _, ok := diskFailures[diskIndex]; ok {
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if disk != nil {
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t.Errorf("Disk not filtered as expected, disk: %d", diskIndex)
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}
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if errs[diskIndex] == nil {
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t.Errorf("Expected error not received, diskIndex: %d", diskIndex)
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}
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} else {
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if disk == nil {
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t.Errorf("Disk erroneously filtered, diskIndex: %d", diskIndex)
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}
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if errs[diskIndex] != nil {
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t.Errorf("Unexpected error, %s, diskIndex: %d", errs[diskIndex], diskIndex)
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}
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}
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}
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}
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