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28f95f1fbe
FileInfo quorum shouldn't be passed down, instead inferred after obtaining a maximally occurring FileInfo. This PR also changes other functions that rely on wrong quorum calculation. Update tests as well to handle the proper requirement. All these changes are needed when migrating from older deployments where we used to set N/2 quorum for reads to EC:4 parity in newer releases.
599 lines
18 KiB
Go
599 lines
18 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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"bytes"
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"context"
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"errors"
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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/madmin-go"
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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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},
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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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},
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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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},
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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.Errorf("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 obj.Shutdown(context.Background())
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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"), smallFileThreshold*16)
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z := obj.(*erasureServerPools)
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erasureDisks := z.serverPools[0].sets[0].getDisks()
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for i, test := range testCases {
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test := test
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t.Run(fmt.Sprintf("case-%d", i), func(t *testing.T) {
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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, "", false)
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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("expected error to be nil: %s", 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].Delete(context.Background(), bucket, pathJoin(object, fi.DataDir, "part.1"), false)
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if dErr != nil {
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t.Fatalf("Failed to delete %s - %v", 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.WriteString("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("Expected modTime to be equal to %v but was found to be %v",
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test.expectedTime, modTime)
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}
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availableDisks, newErrs := disksWithAllParts(ctx, onlineDisks, partsMetadata, test.errs, fi, 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("disk (%v) with part.1 missing is not a disk with available data",
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erasureDisks[tamperedIndex])
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}
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}
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})
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}
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}
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// TestListOnlineDisksSmallObjects - checks if listOnlineDisks and outDatedDisks
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// are consistent with each other.
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func TestListOnlineDisksSmallObjects(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 obj.Shutdown(context.Background())
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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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timeSentinel := time.Unix(1, 0).UTC()
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threeNanoSecs := time.Unix(3, 0).UTC()
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fourNanoSecs := time.Unix(4, 0).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"), smallFileThreshold/2)
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z := obj.(*erasureServerPools)
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erasureDisks := z.serverPools[0].sets[0].getDisks()
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for i, test := range testCases {
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test := test
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t.Run(fmt.Sprintf("case-%d", i), func(t *testing.T) {
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_, err := obj.PutObject(ctx, bucket, object,
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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, "", true)
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_, 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("expected error to be nil: %s", errs[j])
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}
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partsMetadata[j].ModTime = test.modTimes[j]
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}
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if erasureDisks, err = writeUniqueFileInfo(ctx, erasureDisks, bucket, object, partsMetadata, diskCount(erasureDisks)); err != nil {
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t.Fatal(ctx, err)
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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].Delete(context.Background(), bucket, pathJoin(object, xlStorageFormatFile), false)
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if dErr != nil {
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t.Fatalf("Failed to delete %s - %v", pathJoin(object, xlStorageFormatFile), 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, xlStorageFormatFile)
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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.WriteString("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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partsMetadata, errs = readAllFileInfo(ctx, erasureDisks, bucket, object, "", true)
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fi, err := getLatestFileInfo(ctx, partsMetadata, errs)
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if !errors.Is(err, errErasureReadQuorum) {
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t.Fatalf("Failed to getLatestFileInfo, expected %v, got %v", errErasureReadQuorum, err)
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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("Expected modTime to be equal to %v but was found to be %v",
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test.expectedTime, modTime)
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}
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availableDisks, newErrs := disksWithAllParts(ctx, onlineDisks, partsMetadata, test.errs, fi, 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("disk (%v) with part.1 missing is not a disk with available data",
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erasureDisks[tamperedIndex])
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}
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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 obj.Shutdown(context.Background())
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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.(*erasureServerPools)
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s := z.serverPools[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, "", false)
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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)
|
|
}
|
|
|
|
// Test 1: Test that all disks are returned without any failures with
|
|
// unmodified meta data
|
|
partsMetadata, errs := readAllFileInfo(ctx, erasureDisks, bucket, object, "", false)
|
|
if err != nil {
|
|
t.Fatalf("Failed to read xl meta data %v", err)
|
|
}
|
|
|
|
fi, err := getLatestFileInfo(ctx, partsMetadata, errs)
|
|
if err != nil {
|
|
t.Fatalf("Failed to get quorum consistent fileInfo %v", err)
|
|
}
|
|
|
|
erasureDisks, _ = listOnlineDisks(erasureDisks, partsMetadata, errs)
|
|
|
|
filteredDisks, errs := disksWithAllParts(ctx, erasureDisks, partsMetadata, errs, fi, bucket, object, madmin.HealDeepScan)
|
|
|
|
if len(filteredDisks) != len(erasureDisks) {
|
|
t.Errorf("Unexpected number of disks: %d", len(filteredDisks))
|
|
}
|
|
|
|
for diskIndex, disk := range filteredDisks {
|
|
if errs[diskIndex] != nil {
|
|
t.Errorf("Unexpected error %s", errs[diskIndex])
|
|
}
|
|
|
|
if disk == nil {
|
|
t.Errorf("Disk erroneously filtered, diskIndex: %d", diskIndex)
|
|
}
|
|
}
|
|
|
|
// Test 2: Not synchronized modtime
|
|
partsMetadataBackup := partsMetadata[0]
|
|
partsMetadata[0].ModTime = partsMetadata[0].ModTime.Add(-1 * time.Hour)
|
|
|
|
errs = make([]error, len(erasureDisks))
|
|
filteredDisks, _ = disksWithAllParts(ctx, erasureDisks, partsMetadata, errs, fi, bucket, object, madmin.HealDeepScan)
|
|
|
|
if len(filteredDisks) != len(erasureDisks) {
|
|
t.Errorf("Unexpected number of disks: %d", len(filteredDisks))
|
|
}
|
|
for diskIndex, disk := range filteredDisks {
|
|
if diskIndex == 0 && disk != nil {
|
|
t.Errorf("Disk not filtered as expected, disk: %d", diskIndex)
|
|
}
|
|
if diskIndex != 0 && disk == nil {
|
|
t.Errorf("Disk erroneously filtered, diskIndex: %d", diskIndex)
|
|
}
|
|
}
|
|
partsMetadata[0] = partsMetadataBackup // Revert before going to the next test
|
|
|
|
// Test 3: Not synchronized DataDir
|
|
partsMetadataBackup = partsMetadata[1]
|
|
partsMetadata[1].DataDir = "foo-random"
|
|
|
|
errs = make([]error, len(erasureDisks))
|
|
filteredDisks, _ = disksWithAllParts(ctx, erasureDisks, partsMetadata, errs, fi, bucket, object, madmin.HealDeepScan)
|
|
|
|
if len(filteredDisks) != len(erasureDisks) {
|
|
t.Errorf("Unexpected number of disks: %d", len(filteredDisks))
|
|
}
|
|
for diskIndex, disk := range filteredDisks {
|
|
if diskIndex == 1 && disk != nil {
|
|
t.Errorf("Disk not filtered as expected, disk: %d", diskIndex)
|
|
}
|
|
if diskIndex != 1 && disk == nil {
|
|
t.Errorf("Disk erroneously filtered, diskIndex: %d", diskIndex)
|
|
}
|
|
}
|
|
partsMetadata[1] = partsMetadataBackup // Revert before going to the next test
|
|
|
|
// Test 4: key = disk index, value = part name with hash mismatch
|
|
diskFailures := make(map[int]string)
|
|
diskFailures[0] = "part.1"
|
|
diskFailures[3] = "part.1"
|
|
diskFailures[15] = "part.1"
|
|
|
|
for diskIndex, partName := range diskFailures {
|
|
for i := range partsMetadata[diskIndex].Erasure.Checksums {
|
|
if fmt.Sprintf("part.%d", i+1) == partName {
|
|
filePath := pathJoin(erasureDisks[diskIndex].String(), bucket, object, partsMetadata[diskIndex].DataDir, partName)
|
|
f, err := os.OpenFile(filePath, os.O_WRONLY|os.O_SYNC, 0)
|
|
if err != nil {
|
|
t.Fatalf("Failed to open %s: %s\n", filePath, err)
|
|
}
|
|
f.WriteString("oops") // Will cause bitrot error
|
|
f.Close()
|
|
}
|
|
}
|
|
}
|
|
|
|
errs = make([]error, len(erasureDisks))
|
|
filteredDisks, errs = disksWithAllParts(ctx, erasureDisks, partsMetadata, errs, fi, bucket, object, madmin.HealDeepScan)
|
|
|
|
if len(filteredDisks) != len(erasureDisks) {
|
|
t.Errorf("Unexpected number of disks: %d", len(filteredDisks))
|
|
}
|
|
|
|
for diskIndex, disk := range filteredDisks {
|
|
if _, ok := diskFailures[diskIndex]; ok {
|
|
if disk != nil {
|
|
t.Errorf("Disk not filtered as expected, disk: %d", diskIndex)
|
|
}
|
|
if errs[diskIndex] == nil {
|
|
t.Errorf("Expected error not received, diskIndex: %d", diskIndex)
|
|
}
|
|
} else {
|
|
if disk == nil {
|
|
t.Errorf("Disk erroneously filtered, diskIndex: %d", diskIndex)
|
|
}
|
|
if errs[diskIndex] != nil {
|
|
t.Errorf("Unexpected error, %s, diskIndex: %d", errs[diskIndex], diskIndex)
|
|
}
|
|
|
|
}
|
|
}
|
|
}
|