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testutil.go
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testutil.go
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package compactor
import (
"bufio"
"context"
"fmt"
"io"
"os"
"path/filepath"
"sort"
"strings"
"testing"
"time"
"github.com/go-kit/log"
"github.com/klauspost/compress/gzip"
"github.com/prometheus/prometheus/model/labels"
"github.com/stretchr/testify/require"
"github.com/grafana/loki/pkg/storage/chunk"
"github.com/grafana/loki/pkg/storage/chunk/client/util"
"github.com/grafana/loki/pkg/storage/config"
"github.com/grafana/loki/pkg/storage/stores/indexshipper/compactor/retention"
"github.com/grafana/loki/pkg/storage/stores/indexshipper/index"
"github.com/grafana/loki/pkg/storage/stores/shipper/testutil"
)
const (
multiTenantIndexPrefix = "mti"
sharedIndexPrefix = "si"
)
type IndexFileConfig struct {
CompressFile bool
}
type IndexRecords struct {
Start, NumRecords int
}
func compressFile(t *testing.T, filepath string) {
t.Helper()
uncompressedFile, err := os.Open(filepath)
require.NoError(t, err)
compressedFile, err := os.Create(fmt.Sprintf("%s.gz", filepath))
require.NoError(t, err)
compressedWriter := gzip.NewWriter(compressedFile)
_, err = io.Copy(compressedWriter, uncompressedFile)
require.NoError(t, err)
require.NoError(t, compressedWriter.Close())
require.NoError(t, uncompressedFile.Close())
require.NoError(t, compressedFile.Close())
require.NoError(t, os.Remove(filepath))
}
type IndexesConfig struct {
NumUnCompactedFiles, NumCompactedFiles int
}
func (c IndexesConfig) String() string {
return fmt.Sprintf("Common Indexes - UCIFs: %d, CIFs: %d", c.NumUnCompactedFiles, c.NumCompactedFiles)
}
type PerUserIndexesConfig struct {
IndexesConfig
NumUsers int
}
func (c PerUserIndexesConfig) String() string {
return fmt.Sprintf("Per User Indexes - UCIFs: %d, CIFs: %d, Users: %d", c.NumUnCompactedFiles, c.NumCompactedFiles, c.NumUsers)
}
func SetupTable(t *testing.T, path string, commonDBsConfig IndexesConfig, perUserDBsConfig PerUserIndexesConfig) {
require.NoError(t, util.EnsureDirectory(path))
commonIndexes, perUserIndexes := buildFilesContent(commonDBsConfig, perUserDBsConfig)
idx := 0
for filename, content := range commonIndexes {
filePath := filepath.Join(path, strings.TrimSuffix(filename, ".gz"))
require.NoError(t, os.WriteFile(filePath, []byte(content), 0777))
if strings.HasSuffix(filename, ".gz") {
compressFile(t, filePath)
}
idx++
}
for userID, files := range perUserIndexes {
require.NoError(t, util.EnsureDirectory(filepath.Join(path, userID)))
for filename, content := range files {
filePath := filepath.Join(path, userID, strings.TrimSuffix(filename, ".gz"))
require.NoError(t, os.WriteFile(filePath, []byte(content), 0777))
if strings.HasSuffix(filename, ".gz") {
compressFile(t, filePath)
}
}
}
}
func buildFilesContent(commonDBsConfig IndexesConfig, perUserDBsConfig PerUserIndexesConfig) (map[string]string, map[string]map[string]string) {
// filename -> content
commonIndexes := map[string]string{}
// userID -> filename -> content
perUserIndexes := map[string]map[string]string{}
for i := 0; i < commonDBsConfig.NumUnCompactedFiles; i++ {
fileName := fmt.Sprintf("%s-%d", sharedIndexPrefix, i)
if i%2 == 0 {
fileName += ".gz"
}
commonIndexes[fileName] = fmt.Sprint(i)
}
for i := 0; i < commonDBsConfig.NumCompactedFiles; i++ {
commonIndexes[fmt.Sprintf("compactor-%d.gz", i)] = fmt.Sprint(i)
}
for i := 0; i < perUserDBsConfig.NumUnCompactedFiles; i++ {
fileName := fmt.Sprintf("%s-%d", multiTenantIndexPrefix, i)
if i%2 == 0 {
fileName += ".gz"
}
commonIndexes[fileName] = ""
for j := 0; j < perUserDBsConfig.NumUsers; j = j + 1 {
commonIndexes[fileName] = commonIndexes[fileName] + BuildUserID(j) + "\n"
}
}
for i := 0; i < perUserDBsConfig.NumCompactedFiles; i++ {
for j := 0; j < perUserDBsConfig.NumUsers; j++ {
userID := BuildUserID(j)
if i == 0 {
perUserIndexes[userID] = map[string]string{}
}
perUserIndexes[userID][fmt.Sprintf("compactor-%d.gz", i)] = fmt.Sprint(i)
}
}
return commonIndexes, perUserIndexes
}
func BuildUserID(id int) string {
return fmt.Sprintf("user-%d", id)
}
type compactedIndex struct {
indexFile *os.File
}
func openCompactedIndex(path string) (*compactedIndex, error) {
idxFile, err := os.OpenFile(path, os.O_RDWR|os.O_CREATE|os.O_APPEND, 0755)
if err != nil {
return nil, err
}
return &compactedIndex{indexFile: idxFile}, nil
}
func (c compactedIndex) ForEachChunk(_ context.Context, _ retention.ChunkEntryCallback) error {
return nil
}
func (c compactedIndex) IndexChunk(_ chunk.Chunk) (bool, error) {
return true, nil
}
func (c compactedIndex) CleanupSeries(_ []byte, _ labels.Labels) error {
return nil
}
func (c compactedIndex) Cleanup() {
_ = c.indexFile.Close()
}
func (c compactedIndex) ToIndexFile() (index.Index, error) {
return c, nil
}
func (c compactedIndex) Name() string {
return fmt.Sprintf("compactor-%d", time.Now().Unix())
}
func (c compactedIndex) Path() string {
return c.indexFile.Name()
}
func (c compactedIndex) Close() error {
return c.indexFile.Close()
}
func (c compactedIndex) Reader() (io.ReadSeeker, error) {
_, err := c.indexFile.Seek(0, 0)
if err != nil {
return nil, err
}
return c.indexFile, nil
}
type testIndexCompactor struct{}
func newTestIndexCompactor() testIndexCompactor {
return testIndexCompactor{}
}
func (i testIndexCompactor) NewTableCompactor(ctx context.Context, commonIndexSet IndexSet, existingUserIndexSet map[string]IndexSet, makeEmptyUserIndexSetFunc MakeEmptyUserIndexSetFunc, periodConfig config.PeriodConfig) TableCompactor {
return newTestTableCompactor(ctx, commonIndexSet, existingUserIndexSet, makeEmptyUserIndexSetFunc, periodConfig)
}
type tableCompactor struct {
ctx context.Context
commonIndexSet IndexSet
existingUserIndexSet map[string]IndexSet
makeEmptyUserIndexSetFunc MakeEmptyUserIndexSetFunc
periodConfig config.PeriodConfig
}
func newTestTableCompactor(ctx context.Context, commonIndexSet IndexSet, existingUserIndexSet map[string]IndexSet, makeEmptyUserIndexSetFunc MakeEmptyUserIndexSetFunc, periodConfig config.PeriodConfig) tableCompactor {
return tableCompactor{
ctx: ctx,
commonIndexSet: commonIndexSet,
existingUserIndexSet: existingUserIndexSet,
makeEmptyUserIndexSetFunc: makeEmptyUserIndexSetFunc,
periodConfig: periodConfig,
}
}
func (t tableCompactor) CompactTable() error {
sourceFiles := t.commonIndexSet.ListSourceFiles()
perUserIndexes := map[string]CompactedIndex{}
var commonCompactedIndex CompactedIndex
if len(sourceFiles) > 1 || (len(sourceFiles) == 1 && !strings.Contains(sourceFiles[0].Name, "compactor")) {
multiTenantIndexFilesCount := 0
for _, sourceIndex := range t.commonIndexSet.ListSourceFiles() {
if strings.HasPrefix(sourceIndex.Name, multiTenantIndexPrefix) {
multiTenantIndexFilesCount++
}
srcFilePath, err := t.commonIndexSet.GetSourceFile(sourceIndex)
if err != nil {
return err
}
if strings.HasPrefix(sourceIndex.Name, multiTenantIndexPrefix) {
srcFile, err := os.Open(srcFilePath)
if err != nil {
return err
}
scanner := bufio.NewScanner(srcFile)
for scanner.Scan() {
userID := scanner.Text()
userIndex, ok := perUserIndexes[userID]
if ok {
_, err := userIndex.(*compactedIndex).indexFile.WriteString(sourceIndex.Name)
if err != nil {
return err
}
continue
}
userIdxSet, ok := t.existingUserIndexSet[userID]
if !ok {
userIdxSet, err = t.makeEmptyUserIndexSetFunc(userID)
if err != nil {
return err
}
t.existingUserIndexSet[userID] = userIdxSet
}
userIndex, err = openCompactedIndex(filepath.Join(userIdxSet.GetWorkingDir(), fmt.Sprintf("compactor-%d", time.Now().Unix())))
if err != nil {
return err
}
perUserIndexes[userID] = userIndex
for _, idx := range userIdxSet.ListSourceFiles() {
_, err := userIndex.(*compactedIndex).indexFile.WriteString(idx.Name)
if err != nil {
return err
}
}
_, err := userIndex.(*compactedIndex).indexFile.WriteString(sourceIndex.Name)
if err != nil {
return err
}
}
if err := srcFile.Close(); err != nil {
return err
}
} else {
if commonCompactedIndex == nil {
commonCompactedIndex, err = openCompactedIndex(filepath.Join(t.commonIndexSet.GetWorkingDir(), fmt.Sprintf("compactor-%d", time.Now().Unix())))
if err != nil {
return err
}
}
_, err := commonCompactedIndex.(*compactedIndex).indexFile.WriteString(sourceIndex.Name)
if err != nil {
return err
}
}
}
if err := t.commonIndexSet.SetCompactedIndex(commonCompactedIndex, true); err != nil {
return err
}
}
for userID, idxSet := range t.existingUserIndexSet {
if _, ok := perUserIndexes[userID]; ok || len(idxSet.ListSourceFiles()) <= 1 {
continue
}
var err error
perUserIndexes[userID], err = openCompactedIndex(filepath.Join(idxSet.GetWorkingDir(), fmt.Sprintf("compactor-%d", time.Now().Unix())))
if err != nil {
return err
}
for _, srcFile := range idxSet.ListSourceFiles() {
_, err := perUserIndexes[userID].(*compactedIndex).indexFile.WriteString(srcFile.Name)
if err != nil {
return err
}
}
}
for userID, userIndex := range perUserIndexes {
if err := t.existingUserIndexSet[userID].SetCompactedIndex(userIndex, true); err != nil {
return err
}
}
return nil
}
func (i testIndexCompactor) OpenCompactedIndexFile(_ context.Context, path, _, _, _ string, _ config.PeriodConfig, _ log.Logger) (CompactedIndex, error) {
return openCompactedIndex(path)
}
func verifyCompactedIndexTable(t *testing.T, commonDBsConfig IndexesConfig, perUserDBsConfig PerUserIndexesConfig, tablePathInStorage string) {
commonIndexes, perUserIndexes := buildFilesContent(commonDBsConfig, perUserDBsConfig)
dirEntries, err := os.ReadDir(tablePathInStorage)
require.NoError(t, err)
files, folders := []string{}, []string{}
for _, entry := range dirEntries {
if entry.IsDir() {
folders = append(folders, entry.Name())
} else {
files = append(files, entry.Name())
}
}
expectedCommonIndexContent := []string{}
expectedUserIndexContent := map[string][]string{}
for userID := range perUserIndexes {
for fileName := range perUserIndexes[userID] {
if perUserDBsConfig.NumCompactedFiles == 1 && perUserDBsConfig.NumUnCompactedFiles == 0 {
expectedUserIndexContent[userID] = append(expectedUserIndexContent[userID], "0")
} else {
expectedUserIndexContent[userID] = append(expectedUserIndexContent[userID], fileName)
}
}
}
if len(commonIndexes) == 0 {
require.Equal(t, 0, len(files))
} else if len(commonIndexes) == 1 && commonDBsConfig.NumCompactedFiles == 1 {
expectedCommonIndexContent = append(expectedCommonIndexContent, "0")
} else {
for fileName, content := range commonIndexes {
if strings.HasPrefix(fileName, multiTenantIndexPrefix) {
scanner := bufio.NewScanner(strings.NewReader(content))
for scanner.Scan() {
expectedUserIndexContent[scanner.Text()] = append(expectedUserIndexContent[scanner.Text()], fileName)
}
} else {
expectedCommonIndexContent = append(expectedCommonIndexContent, fileName)
}
}
}
if len(expectedCommonIndexContent) == 0 {
require.Len(t, files, 0, fmt.Sprintf("%v", commonIndexes))
} else {
require.Len(t, files, 1, fmt.Sprintf("%v", commonIndexes))
sort.Strings(expectedCommonIndexContent)
require.Equal(t, strings.Join(expectedCommonIndexContent, ""), string(readFile(t, filepath.Join(tablePathInStorage, files[0]))))
}
require.Len(t, folders, len(expectedUserIndexContent), fmt.Sprintf("%v", commonIndexes))
for _, userID := range folders {
entries, err := os.ReadDir(filepath.Join(tablePathInStorage, userID))
require.NoError(t, err)
require.Len(t, entries, 1)
require.False(t, entries[0].IsDir())
sort.Strings(expectedUserIndexContent[userID])
require.Equal(t, strings.Join(expectedUserIndexContent[userID], ""), string(readFile(t, filepath.Join(tablePathInStorage, userID, entries[0].Name()))))
}
}
func readFile(t *testing.T, path string) []byte {
if strings.HasSuffix(path, ".gz") {
tempDir := t.TempDir()
decompressedFilePath := filepath.Join(tempDir, "decompressed")
testutil.DecompressFile(t, path, decompressedFilePath)
path = decompressedFilePath
}
fileContent, err := os.ReadFile(path)
require.NoError(t, err)
return fileContent
}