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add auto start from snapshot (#3193)
Co-authored-by: KamiD <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,199 @@ | ||
| package app | ||
|
|
||
| import ( | ||
| "archive/tar" | ||
| "bytes" | ||
| "fmt" | ||
| "github.com/klauspost/pgzip" | ||
| "github.com/okex/exchain/libs/cosmos-sdk/types/errors" | ||
| "github.com/okex/exchain/libs/tendermint/libs/log" | ||
| "io" | ||
| "io/ioutil" | ||
| "net/url" | ||
| "os" | ||
| "os/exec" | ||
| "path/filepath" | ||
| "runtime" | ||
| "strings" | ||
| "time" | ||
| ) | ||
|
|
||
| func prepareSnapshotDataIfNeed(snapshotURL string, home string, logger log.Logger) { | ||
| if snapshotURL == "" { | ||
| return | ||
| } | ||
|
|
||
| snapshotHome := filepath.Join(home, ".download_snapshots") | ||
|
|
||
| // check whether the snapshot file has been downloaded | ||
| byteData, err := os.ReadFile(filepath.Join(snapshotHome, ".record")) | ||
| if err == nil && strings.Contains(string(byteData), snapshotURL) { | ||
| return | ||
| } | ||
|
|
||
| if _, err := url.Parse(snapshotURL); err != nil { | ||
| panic(errors.Wrap(err, "invalid snapshot URL")) | ||
| } | ||
|
|
||
| // download snapshot | ||
| snapshotFile, err := downloadSnapshot(snapshotURL, snapshotHome, logger) | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
|
|
||
| // uncompress snapshot | ||
| logger.Info("start to uncompress snapshot") | ||
| if err := extractTarGz(snapshotFile, snapshotHome); err != nil { | ||
| panic(err) | ||
| } | ||
|
|
||
| // delete damaged data | ||
| logger.Info("start to delete damaged data") | ||
| if err := os.RemoveAll(filepath.Join(home, "data")); err != nil { | ||
| panic(err) | ||
| } | ||
|
|
||
| // move snapshot data | ||
| logger.Info("start to move snapshot data") | ||
| if err := moveDir(filepath.Join(snapshotHome, "data"), filepath.Join(home, "data")); err != nil { | ||
| panic(err) | ||
| } | ||
|
|
||
| os.Remove(snapshotFile) | ||
|
|
||
| os.WriteFile(filepath.Join(snapshotHome, ".record"), []byte(snapshotURL+"\n"), 0644) | ||
|
|
||
| logger.Info("snapshot data is ready, start node soon!") | ||
| } | ||
|
|
||
| func downloadSnapshot(url, outputPath string, logger log.Logger) (string, error) { | ||
| // create dir | ||
| _, err := os.Stat(outputPath) | ||
| if err != nil { | ||
| os.MkdirAll(outputPath, 0755) | ||
| } | ||
|
|
||
| fileName := url[strings.LastIndex(url, "/")+1:] | ||
| targetFile := filepath.Join(outputPath, fileName) | ||
|
|
||
| // check file exists | ||
| if _, err := os.Stat(targetFile); err == nil { | ||
| os.Remove(targetFile) | ||
| } | ||
|
|
||
| var stdoutProcessStatus bytes.Buffer | ||
|
|
||
| axel := exec.Command("axel", "-n", fmt.Sprintf("%d", runtime.NumCPU()), "-o", targetFile, url) | ||
| axel.Stdout = io.MultiWriter(ioutil.Discard, &stdoutProcessStatus) | ||
| done := make(chan struct{}) | ||
| defer close(done) | ||
|
|
||
| // print download detail | ||
| go func() { | ||
| tick := time.NewTicker(time.Millisecond * 50) | ||
| defer tick.Stop() | ||
| for { | ||
| select { | ||
| case <-done: | ||
| return | ||
| case <-tick.C: | ||
| bts := make([]byte, stdoutProcessStatus.Len()) | ||
| stdoutProcessStatus.Read(bts) | ||
| logger.Info(string(bts)) | ||
| } | ||
| } | ||
| }() | ||
|
|
||
| // run and wait | ||
| err = axel.Run() | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
|
|
||
| return targetFile, nil | ||
| } | ||
|
|
||
| func extractTarGz(tarGzFile, destinationDir string) error { | ||
| // open .tar.gz | ||
| file, err := os.Open(tarGzFile) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| defer file.Close() | ||
|
|
||
| // use gzip.Reader | ||
| gzReader, err := pgzip.NewReaderN(file, 1<<22, runtime.NumCPU()) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| defer gzReader.Close() | ||
|
|
||
| // create tar.Reader | ||
| tarReader := tar.NewReader(gzReader) | ||
|
|
||
| // uncompress file back to back | ||
| for { | ||
| header, err := tarReader.Next() | ||
| if err == io.EOF { | ||
| break | ||
| } | ||
| if err != nil { | ||
| return err | ||
| } | ||
| if header == nil { | ||
| continue | ||
| } | ||
| target := filepath.Join(destinationDir, header.Name) | ||
|
|
||
| switch header.Typeflag { | ||
| case tar.TypeDir: | ||
| err = os.MkdirAll(target, 0755) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| case tar.TypeReg: | ||
| parent := filepath.Dir(target) | ||
| err = os.MkdirAll(parent, 0755) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| file, err := os.Create(target) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| defer file.Close() | ||
|
|
||
| _, err = io.Copy(file, tarReader) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| } | ||
| } | ||
|
|
||
| return nil | ||
| } | ||
|
|
||
| func moveDir(sourceDir, destinationDir string) error { | ||
| sourceInfo, err := os.Stat(sourceDir) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| if !sourceInfo.IsDir() { | ||
| return fmt.Errorf("%s isn't dir", sourceDir) | ||
| } | ||
|
|
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| _, err = os.Stat(destinationDir) | ||
| if err == nil { | ||
| return fmt.Errorf("dest dir %s exists", destinationDir) | ||
| } | ||
|
|
||
| // move | ||
| err = os.Rename(sourceDir, destinationDir) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| return nil | ||
| } |
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