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buildtsi.go
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buildtsi.go
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// Package buildtsi reads an in-memory index and exports it as a TSI index.
package buildtsi
import (
"flag"
"fmt"
"io"
"io/ioutil"
"os"
"path/filepath"
"strconv"
"github.com/influxdata/influxdb/logger"
"github.com/influxdata/influxdb/models"
"github.com/influxdata/influxdb/tsdb"
"github.com/influxdata/influxdb/tsdb/engine/tsm1"
"github.com/influxdata/influxdb/tsdb/index/tsi1"
"go.uber.org/zap"
)
// Command represents the program execution for "influx_inspect inmem2tsi".
type Command struct {
Stderr io.Writer
Stdout io.Writer
Verbose bool
Logger *zap.Logger
databaseFilter string
retentionFilter string
shardFilter string
}
// NewCommand returns a new instance of Command.
func NewCommand() *Command {
return &Command{
Stderr: os.Stderr,
Stdout: os.Stdout,
Logger: zap.NewNop(),
}
}
// Run executes the command.
func (cmd *Command) Run(args ...string) error {
fs := flag.NewFlagSet("inmem2tsi", flag.ExitOnError)
dataDir := fs.String("datadir", "", "data directory")
walDir := fs.String("waldir", "", "WAL directory")
fs.StringVar(&cmd.databaseFilter, "database", "", "optional: database name")
fs.StringVar(&cmd.retentionFilter, "retention", "", "optional: retention policy")
fs.StringVar(&cmd.shardFilter, "shard", "", "optional: shard id")
fs.BoolVar(&cmd.Verbose, "v", false, "verbose")
fs.SetOutput(cmd.Stdout)
if err := fs.Parse(args); err != nil {
return err
} else if fs.NArg() > 0 || *dataDir == "" || *walDir == "" {
return flag.ErrHelp
}
cmd.Logger = logger.New(cmd.Stderr)
return cmd.run(*dataDir, *walDir)
}
func (cmd *Command) run(dataDir, walDir string) error {
fis, err := ioutil.ReadDir(dataDir)
if err != nil {
return err
}
for _, fi := range fis {
name := fi.Name()
if !fi.IsDir() {
continue
} else if cmd.databaseFilter != "" && name != cmd.databaseFilter {
continue
}
if err := cmd.processDatabase(name, filepath.Join(dataDir, name), filepath.Join(walDir, name)); err != nil {
return err
}
}
return nil
}
func (cmd *Command) processDatabase(dbName, dataDir, walDir string) error {
cmd.Logger.Info("rebuilding database", zap.String("name", dbName))
sfile := tsdb.NewSeriesFile(filepath.Join(dataDir, tsdb.SeriesFileDirectory))
sfile.Logger = cmd.Logger
if err := sfile.Open(); err != nil {
return err
}
defer sfile.Close()
fis, err := ioutil.ReadDir(dataDir)
if err != nil {
return err
}
for _, fi := range fis {
rpName := fi.Name()
if !fi.IsDir() {
continue
} else if rpName == tsdb.SeriesFileDirectory {
continue
} else if cmd.retentionFilter != "" && rpName != cmd.retentionFilter {
continue
}
if err := cmd.processRetentionPolicy(sfile, dbName, rpName, filepath.Join(dataDir, rpName), filepath.Join(walDir, rpName)); err != nil {
return err
}
}
return nil
}
func (cmd *Command) processRetentionPolicy(sfile *tsdb.SeriesFile, dbName, rpName, dataDir, walDir string) error {
cmd.Logger.Info("rebuilding retention policy", zap.String("db", dbName), zap.String("rp", rpName))
fis, err := ioutil.ReadDir(dataDir)
if err != nil {
return err
}
for _, fi := range fis {
if !fi.IsDir() {
continue
} else if cmd.shardFilter != "" && fi.Name() != cmd.shardFilter {
continue
}
shardID, err := strconv.ParseUint(fi.Name(), 10, 64)
if err != nil {
continue
}
if err := cmd.processShard(sfile, dbName, rpName, shardID, filepath.Join(dataDir, fi.Name()), filepath.Join(walDir, fi.Name())); err != nil {
return err
}
}
return nil
}
func (cmd *Command) processShard(sfile *tsdb.SeriesFile, dbName, rpName string, shardID uint64, dataDir, walDir string) error {
cmd.Logger.Info("rebuilding shard", zap.String("db", dbName), zap.String("rp", rpName), zap.Uint64("shard", shardID))
// Check if shard already has a TSI index.
indexPath := filepath.Join(dataDir, "index")
cmd.Logger.Info("checking index path", zap.String("path", indexPath))
if _, err := os.Stat(indexPath); !os.IsNotExist(err) {
cmd.Logger.Info("tsi1 index already exists, skipping", zap.String("path", indexPath))
return nil
}
cmd.Logger.Info("opening shard")
// Find shard files.
tsmPaths, err := cmd.collectTSMFiles(dataDir)
if err != nil {
return err
}
walPaths, err := cmd.collectWALFiles(walDir)
if err != nil {
return err
}
// Remove temporary index files if this is being re-run.
tmpPath := filepath.Join(dataDir, ".index")
cmd.Logger.Info("cleaning up partial index from previous run, if any")
if err := os.RemoveAll(tmpPath); err != nil {
return err
}
// Open TSI index in temporary path.
tsiIndex := tsi1.NewIndex(sfile, dbName, tsi1.WithPath(tmpPath))
tsiIndex.WithLogger(cmd.Logger)
cmd.Logger.Info("opening tsi index in temporary location", zap.String("path", tmpPath))
if err := tsiIndex.Open(); err != nil {
return err
}
defer tsiIndex.Close()
// Write out tsm1 files.
cmd.Logger.Info("iterating over tsm files")
for _, path := range tsmPaths {
cmd.Logger.Info("processing tsm file", zap.String("path", path))
if err := cmd.processTSMFile(tsiIndex, path); err != nil {
return err
}
}
// Write out wal files.
cmd.Logger.Info("building cache from wal files")
cache := tsm1.NewCache(tsdb.DefaultCacheMaxMemorySize, "")
loader := tsm1.NewCacheLoader(walPaths)
loader.WithLogger(cmd.Logger)
if err := loader.Load(cache); err != nil {
return err
}
cmd.Logger.Info("iterating over cache")
for _, key := range cache.Keys() {
seriesKey, _ := tsm1.SeriesAndFieldFromCompositeKey(key)
name, tags := models.ParseKey(seriesKey)
if cmd.Verbose {
cmd.Logger.Info("series", zap.String("name", string(name)), zap.String("tags", tags.String()))
}
if err := tsiIndex.CreateSeriesIfNotExists(nil, []byte(name), tags); err != nil {
return fmt.Errorf("cannot create series: %s %s (%s)", name, tags.String(), err)
}
}
// Attempt to compact the index & wait for all compactions to complete.
cmd.Logger.Info("compacting index")
tsiIndex.Compact()
tsiIndex.Wait()
// Close TSI index.
cmd.Logger.Info("closing tsi index")
if err := tsiIndex.Close(); err != nil {
return err
}
// Rename TSI to standard path.
cmd.Logger.Info("moving tsi to permanent location")
return os.Rename(tmpPath, indexPath)
}
func (cmd *Command) processTSMFile(index *tsi1.Index, path string) error {
f, err := os.Open(path)
if err != nil {
return err
}
defer f.Close()
r, err := tsm1.NewTSMReader(f)
if err != nil {
cmd.Logger.Warn("unable to read, skipping", zap.String("path", path), zap.Error(err))
return nil
}
defer r.Close()
for i := 0; i < r.KeyCount(); i++ {
key, _ := r.KeyAt(i)
seriesKey, _ := tsm1.SeriesAndFieldFromCompositeKey(key)
name, tags := models.ParseKey(seriesKey)
if cmd.Verbose {
cmd.Logger.Info("series", zap.String("name", string(name)), zap.String("tags", tags.String()))
}
if err := index.CreateSeriesIfNotExists(nil, []byte(name), tags); err != nil {
return fmt.Errorf("cannot create series: %s %s (%s)", name, tags.String(), err)
}
}
return nil
}
func (cmd *Command) collectTSMFiles(path string) ([]string, error) {
fis, err := ioutil.ReadDir(path)
if err != nil {
return nil, err
}
var paths []string
for _, fi := range fis {
if filepath.Ext(fi.Name()) != "."+tsm1.TSMFileExtension {
continue
}
paths = append(paths, filepath.Join(path, fi.Name()))
}
return paths, nil
}
func (cmd *Command) collectWALFiles(path string) ([]string, error) {
fis, err := ioutil.ReadDir(path)
if err != nil {
return nil, err
}
var paths []string
for _, fi := range fis {
if filepath.Ext(fi.Name()) != "."+tsm1.WALFileExtension {
continue
}
paths = append(paths, filepath.Join(path, fi.Name()))
}
return paths, nil
}