/
verify.go
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/
verify.go
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// Package tsm verifies integrity of TSM files.
package tsm
import (
"flag"
"fmt"
"hash/crc32"
"io"
"os"
"path/filepath"
"text/tabwriter"
"time"
"unicode/utf8"
"github.com/influxdata/influxdb/tsdb/engine/tsm1"
"github.com/pkg/errors"
)
// Command represents the program execution for "influx_inspect verify".
type Command struct {
Stderr io.Writer
Stdout io.Writer
}
// NewCommand returns a new instance of Command.
func NewCommand() *Command {
return &Command{
Stderr: os.Stderr,
Stdout: os.Stdout,
}
}
// Run executes the command.
func (cmd *Command) Run(args ...string) error {
var path string
fs := flag.NewFlagSet("verify", flag.ExitOnError)
fs.StringVar(&path, "dir", os.Getenv("HOME")+"/.influxdb", "Root storage path. [$HOME/.influxdb]")
var checkUTF8 bool
fs.BoolVar(&checkUTF8, "check-utf8", false, "Verify series keys are valid UTF-8")
fs.SetOutput(cmd.Stdout)
fs.Usage = cmd.printUsage
if err := fs.Parse(args); err != nil {
return err
}
dataPath := filepath.Join(path, "data")
tw := tabwriter.NewWriter(cmd.Stdout, 16, 8, 0, '\t', 0)
var runner verifier
if checkUTF8 {
runner = &verifyUTF8{}
} else {
runner = &verifyChecksums{}
}
err := runner.Run(tw, dataPath)
tw.Flush()
return err
}
// printUsage prints the usage message to STDERR.
func (cmd *Command) printUsage() {
usage := fmt.Sprintf(`Verifies the integrity of TSM files.
Usage: influx_inspect verify [flags]
-dir <path>
The root storage path.
Must be changed if you are using a non-default storage directory.
Defaults to "%[1]s/.influxdb".
-check-utf8
Verify series keys are valid UTF-8.
This check skips verification of block checksums.
`, os.Getenv("HOME"))
fmt.Fprintf(cmd.Stdout, usage)
}
type verifyTSM struct {
files []string
f string
start time.Time
err error
}
func (v *verifyTSM) loadFiles(dataPath string) error {
err := filepath.Walk(dataPath, func(path string, f os.FileInfo, err error) error {
if err != nil {
return err
}
if filepath.Ext(path) == "."+tsm1.TSMFileExtension {
v.files = append(v.files, path)
}
return nil
})
if err != nil {
return errors.Wrap(err, "could not load storage files (use -dir for custom storage root)")
}
return nil
}
func (v *verifyTSM) Next() bool {
if len(v.files) == 0 {
return false
}
v.f, v.files = v.files[0], v.files[1:]
return true
}
func (v *verifyTSM) TSMReader() (string, *tsm1.TSMReader) {
file, err := os.OpenFile(v.f, os.O_RDONLY, 0600)
if err != nil {
v.err = err
return "", nil
}
reader, err := tsm1.NewTSMReader(file)
if err != nil {
file.Close()
v.err = err
return "", nil
}
return v.f, reader
}
func (v *verifyTSM) Start() {
v.start = time.Now()
}
func (v *verifyTSM) Elapsed() time.Duration {
return time.Since(v.start)
}
type verifyChecksums struct {
verifyTSM
totalErrors int
total int
}
func (v *verifyChecksums) Run(w io.Writer, dataPath string) error {
if err := v.loadFiles(dataPath); err != nil {
return err
}
v.Start()
for v.Next() {
f, reader := v.TSMReader()
if reader == nil {
break
}
blockItr := reader.BlockIterator()
fileErrors := 0
count := 0
for blockItr.Next() {
v.total++
key, _, _, _, checksum, buf, err := blockItr.Read()
if err != nil {
v.totalErrors++
fileErrors++
fmt.Fprintf(w, "%s: could not get checksum for key %v block %d due to error: %q\n", f, key, count, err)
} else if expected := crc32.ChecksumIEEE(buf); checksum != expected {
v.totalErrors++
fileErrors++
fmt.Fprintf(w, "%s: got %d but expected %d for key %v, block %d\n", f, checksum, expected, key, count)
}
count++
}
if fileErrors == 0 {
fmt.Fprintf(w, "%s: healthy\n", f)
}
reader.Close()
}
fmt.Fprintf(w, "Broken Blocks: %d / %d, in %vs\n", v.totalErrors, v.total, v.Elapsed().Seconds())
return v.err
}
type verifyUTF8 struct {
verifyTSM
totalErrors int
total int
}
func (v *verifyUTF8) Run(w io.Writer, dataPath string) error {
if err := v.loadFiles(dataPath); err != nil {
return err
}
v.Start()
for v.Next() {
f, reader := v.TSMReader()
if reader == nil {
break
}
n := reader.KeyCount()
fileErrors := 0
v.total += n
for i := 0; i < n; i++ {
key, _ := reader.KeyAt(i)
if !utf8.Valid(key) {
v.totalErrors++
fileErrors++
fmt.Fprintf(w, "%s: key #%d is not valid UTF-8\n", f, i)
}
}
if fileErrors == 0 {
fmt.Fprintf(w, "%s: healthy\n", f)
}
}
fmt.Fprintf(w, "Invalid Keys: %d / %d, in %vs\n", v.totalErrors, v.total, v.Elapsed().Seconds())
if v.totalErrors > 0 && v.err == nil {
v.err = errors.New("check-utf8: failed")
}
return v.err
}
type verifier interface {
Run(w io.Writer, dataPath string) error
}