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fs: Migrate object metadata to objects directory. (#4195)

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Fixes #3352
This commit is contained in:
Harshavardhana 2017-05-05 08:49:09 -07:00 committed by GitHub
parent 99ddd35343
commit 76f4f20609
13 changed files with 775 additions and 93 deletions
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41
cmd/format-config-v1.go
View File

@ -20,8 +20,12 @@ import (
"encoding/json"
"errors"
"fmt"
"io"
"io/ioutil"
"reflect"
"sync"
"github.com/minio/minio/pkg/lock"
)
// fsFormat - structure holding 'fs' format.
@ -47,6 +51,43 @@ type formatConfigV1 struct {
XL *xlFormat `json:"xl,omitempty"` // XL field holds xl format.
}
func (f *formatConfigV1) WriteTo(lk *lock.LockedFile) (n int64, err error) {
// Serialize to prepare to write to disk.
var fbytes []byte
fbytes, err = json.Marshal(f)
if err != nil {
return 0, traceError(err)
}
if err = lk.Truncate(0); err != nil {
return 0, traceError(err)
}
_, err = lk.Write(fbytes)
if err != nil {
return 0, traceError(err)
}
return int64(len(fbytes)), nil
}
func (f *formatConfigV1) ReadFrom(lk *lock.LockedFile) (n int64, err error) {
var fbytes []byte
fi, err := lk.Stat()
if err != nil {
return 0, traceError(err)
}
fbytes, err = ioutil.ReadAll(io.NewSectionReader(lk, 0, fi.Size()))
if err != nil {
return 0, traceError(err)
}
if len(fbytes) == 0 {
return 0, traceError(io.EOF)
}
// Decode `format.json`.
if err = json.Unmarshal(fbytes, f); err != nil {
return 0, traceError(err)
}
return int64(len(fbytes)), nil
}
/*
All disks online

43
cmd/fs-v1-helpers.go
View File

@ -230,7 +230,7 @@ func fsOpenFile(readPath string, offset int64) (io.ReadCloser, int64, error) {
// Creates a file and copies data from incoming reader. Staging buffer is used by io.CopyBuffer.
func fsCreateFile(filePath string, reader io.Reader, buf []byte, fallocSize int64) (int64, error) {
if filePath == "" || reader == nil || buf == nil {
if filePath == "" || reader == nil {
return 0, traceError(errInvalidArgument)
}
@ -263,11 +263,18 @@ func fsCreateFile(filePath string, reader io.Reader, buf []byte, fallocSize int6
}
}
bytesWritten, err := io.CopyBuffer(writer, reader, buf)
if err != nil {
return 0, traceError(err)
var bytesWritten int64
if buf != nil {
bytesWritten, err = io.CopyBuffer(writer, reader, buf)
if err != nil {
return 0, traceError(err)
}
} else {
bytesWritten, err = io.Copy(writer, reader)
if err != nil {
return 0, traceError(err)
}
}
return bytesWritten, nil
}
@ -276,6 +283,12 @@ func fsRemoveUploadIDPath(basePath, uploadIDPath string) error {
if basePath == "" || uploadIDPath == "" {
return traceError(errInvalidArgument)
}
if err := checkPathLength(basePath); err != nil {
return traceError(err)
}
if err := checkPathLength(uploadIDPath); err != nil {
return traceError(err)
}
// List all the entries in uploadID.
entries, err := readDir(uploadIDPath)
@ -319,6 +332,26 @@ func fsFAllocate(fd int, offset int64, len int64) (err error) {
// Renames source path to destination path, creates all the
// missing parents if they don't exist.
func fsRenameFile(sourcePath, destPath string) error {
if err := checkPathLength(sourcePath); err != nil {
return traceError(err)
}
if err := checkPathLength(destPath); err != nil {
return traceError(err)
}
// Verify if source path exists.
if _, err := os.Stat(preparePath(sourcePath)); err != nil {
if os.IsNotExist(err) {
return traceError(errFileNotFound)
} else if os.IsPermission(err) {
return traceError(errFileAccessDenied)
} else if isSysErrPathNotFound(err) {
return traceError(errFileNotFound)
} else if isSysErrNotDir(err) {
// File path cannot be verified since one of the parents is a file.
return traceError(errFileAccessDenied)
}
return traceError(err)
}
if err := mkdirAll(pathutil.Dir(destPath), 0777); err != nil {
return traceError(err)
}

43
cmd/fs-v1-helpers_test.go
View File

@ -26,6 +26,31 @@ import (
"github.com/minio/minio/pkg/lock"
)
func TestFSRenameFile(t *testing.T) {
// create posix test setup
_, path, err := newPosixTestSetup()
if err != nil {
t.Fatalf("Unable to create posix test setup, %s", err)
}
defer removeAll(path)
if err = fsMkdir(pathJoin(path, "testvolume1")); err != nil {
t.Fatal(err)
}
if err = fsRenameFile(pathJoin(path, "testvolume1"), pathJoin(path, "testvolume2")); err != nil {
t.Fatal(err)
}
if err = fsRenameFile(pathJoin(path, "testvolume1"), pathJoin(path, "testvolume2")); errorCause(err) != errFileNotFound {
t.Fatal(err)
}
if err = fsRenameFile(pathJoin(path, "my-obj-del-0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001"), pathJoin(path, "testvolume2")); errorCause(err) != errFileNameTooLong {
t.Fatal("Unexpected error", err)
}
if err = fsRenameFile(pathJoin(path, "testvolume1"), pathJoin(path, "my-obj-del-0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001")); errorCause(err) != errFileNameTooLong {
t.Fatal("Unexpected error", err)
}
}
func TestFSStats(t *testing.T) {
// create posix test setup
_, path, err := newPosixTestSetup()
@ -48,9 +73,8 @@ func TestFSStats(t *testing.T) {
t.Fatalf("Unable to create volume, %s", err)
}
var buf = make([]byte, 4096)
var reader = bytes.NewReader([]byte("Hello, world"))
if _, err = fsCreateFile(pathJoin(path, "success-vol", "success-file"), reader, buf, reader.Size()); err != nil {
if _, err = fsCreateFile(pathJoin(path, "success-vol", "success-file"), reader, nil, 0); err != nil {
t.Fatalf("Unable to create file, %s", err)
}
// Seek back.
@ -60,7 +84,7 @@ func TestFSStats(t *testing.T) {
t.Fatal("Unexpected error", err)
}
if _, err = fsCreateFile(pathJoin(path, "success-vol", "path/to/success-file"), reader, buf, reader.Size()); err != nil {
if _, err = fsCreateFile(pathJoin(path, "success-vol", "path/to/success-file"), reader, nil, 0); err != nil {
t.Fatalf("Unable to create file, %s", err)
}
// Seek back.
@ -174,9 +198,8 @@ func TestFSCreateAndOpen(t *testing.T) {
t.Fatal("Unexpected error", err)
}
var buf = make([]byte, 4096)
var reader = bytes.NewReader([]byte("Hello, world"))
if _, err = fsCreateFile(pathJoin(path, "success-vol", "success-file"), reader, buf, reader.Size()); err != nil {
if _, err = fsCreateFile(pathJoin(path, "success-vol", "success-file"), reader, nil, 0); err != nil {
t.Fatalf("Unable to create file, %s", err)
}
// Seek back.
@ -204,7 +227,7 @@ func TestFSCreateAndOpen(t *testing.T) {
}
for i, testCase := range testCases {
_, err = fsCreateFile(pathJoin(path, testCase.srcVol, testCase.srcPath), reader, buf, reader.Size())
_, err = fsCreateFile(pathJoin(path, testCase.srcVol, testCase.srcPath), reader, nil, 0)
if errorCause(err) != testCase.expectedErr {
t.Errorf("Test case %d: Expected: \"%s\", got: \"%s\"", i+1, testCase.expectedErr, err)
}
@ -297,15 +320,14 @@ func TestFSRemoves(t *testing.T) {
t.Fatalf("Unable to create directory, %s", err)
}
var buf = make([]byte, 4096)
var reader = bytes.NewReader([]byte("Hello, world"))
if _, err = fsCreateFile(pathJoin(path, "success-vol", "success-file"), reader, buf, reader.Size()); err != nil {
if _, err = fsCreateFile(pathJoin(path, "success-vol", "success-file"), reader, nil, 0); err != nil {
t.Fatalf("Unable to create file, %s", err)
}
// Seek back.
reader.Seek(0, 0)
if _, err = fsCreateFile(pathJoin(path, "success-vol", "success-file-new"), reader, buf, reader.Size()); err != nil {
if _, err = fsCreateFile(pathJoin(path, "success-vol", "success-file-new"), reader, nil, 0); err != nil {
t.Fatalf("Unable to create file, %s", err)
}
// Seek back.
@ -417,9 +439,8 @@ func TestFSRemoveMeta(t *testing.T) {
filePath := pathJoin(fsPath, "success-vol", "success-file")
var buf = make([]byte, 4096)
var reader = bytes.NewReader([]byte("Hello, world"))
if _, err = fsCreateFile(filePath, reader, buf, reader.Size()); err != nil {
if _, err = fsCreateFile(filePath, reader, nil, 0); err != nil {
t.Fatalf("Unable to create file, %s", err)
}

187
cmd/fs-v1-metadata.go
View File

@ -18,6 +18,8 @@ package cmd
import (
"encoding/json"
"errors"
"fmt"
"io"
"io/ioutil"
"os"
@ -25,6 +27,7 @@ import (
"sort"
"strings"
"github.com/minio/minio-go/pkg/set"
"github.com/minio/minio/pkg/lock"
"github.com/minio/minio/pkg/mimedb"
"github.com/tidwall/gjson"
@ -225,9 +228,20 @@ const (
// FS backend meta format.
fsMetaFormat = "fs"
// FS backend format version.
fsFormatVersion = fsFormatV2
// Add more constants here.
)
// FS format version strings.
const (
fsFormatV1 = "1" // Previous format.
fsFormatV2 = "2" // Current format.
// Proceed to add "3" when we
// change the backend format in future.
)
// newFSMetaV1 - initializes new fsMetaV1.
func newFSMetaV1() (fsMeta fsMetaV1) {
fsMeta = fsMetaV1{}
@ -237,58 +251,167 @@ func newFSMetaV1() (fsMeta fsMetaV1) {
return fsMeta
}
// newFSFormatV1 - initializes new formatConfigV1 with FS format info.
func newFSFormatV1() (format *formatConfigV1) {
// newFSFormatV2 - initializes new formatConfigV1 with FS format version 2.
func newFSFormatV2() (format *formatConfigV1) {
return &formatConfigV1{
Version: "1",
Format: "fs",
FS: &fsFormat{
Version: "1",
Version: fsFormatV2,
},
}
}
// loads format.json from minioMetaBucket if it exists.
func loadFormatFS(fsPath string) (*formatConfigV1, error) {
rlk, err := lock.RLockedOpenFile(pathJoin(fsPath, minioMetaBucket, fsFormatJSONFile))
if err != nil {
if os.IsNotExist(err) {
return nil, errUnformattedDisk
// Checks if input format is version 1 and 2.
func isFSValidFormat(formatCfg *formatConfigV1) bool {
// Supported format versions.
var supportedFormatVersions = []string{
fsFormatV1,
fsFormatV2,
// New supported versions here.
}
// Check for supported format versions.
for _, version := range supportedFormatVersions {
if formatCfg.FS.Version == version {
return true
}
return nil, err
}
defer rlk.Close()
formatBytes, err := ioutil.ReadAll(rlk)
if err != nil {
return nil, err
}
format := &formatConfigV1{}
if err = json.Unmarshal(formatBytes, format); err != nil {
return nil, err
}
return format, nil
return false
}
// writes FS format (format.json) into minioMetaBucket.
func saveFormatFS(formatPath string, fsFormat *formatConfigV1) error {
metadataBytes, err := json.Marshal(fsFormat)
if err != nil {
// errFSFormatOld- old fs format.
var errFSFormatOld = errors.New("old FS format found")
// Checks if the loaded `format.json` is valid and
// is expected to be of the requested version.
func checkFormatFS(format *formatConfigV1, formatVersion string) error {
if format == nil {
return errUnexpected
}
// Validate if we have the same format.
if format.Format != "fs" {
return fmt.Errorf("Unable to recognize backend format, Disk is not in FS format. %s", format.Format)
}
// Check if format is currently supported.
if !isFSValidFormat(format) {
return errCorruptedFormat
}
// Check for format version is current.
if format.FS.Version != formatVersion {
return errFSFormatOld
}
return nil
}
// This is just kept as reference, there is no sanity
// check for FS format in version "1".
func checkFormatSanityFSV1(fsPath string) error {
return nil
}
// Check for sanity of FS format in version "2".
func checkFormatSanityFSV2(fsPath string) error {
buckets, err := readDir(pathJoin(fsPath, minioMetaBucket, bucketConfigPrefix))
if err != nil && err != errFileNotFound {
return err
}
// Attempt to validate all the buckets have a sanitized backend.
for _, bucket := range buckets {
entries, rerr := readDir(pathJoin(fsPath, minioMetaBucket, bucketConfigPrefix, bucket))
if rerr != nil {
return rerr
}
var expectedConfigs = append(bucketMetadataConfigs, objectMetaPrefix+"/")
entriesSet := set.CreateStringSet(entries...)
expectedConfigsSet := set.CreateStringSet(expectedConfigs...)
// Entries found shouldn't be more than total
// expected config directories, files.
if len(entriesSet) > len(expectedConfigsSet) {
return errCorruptedFormat
}
// Look for the difference between entries and the
// expected config set, resulting entries if they
// intersect with original entries set we know
// that the backend has unexpected files.
if !entriesSet.Difference(expectedConfigsSet).IsEmpty() {
return errCorruptedFormat
}
}
return nil
}
// Check for sanity of FS format for a given version.
func checkFormatSanityFS(fsPath string, fsFormatVersion string) (err error) {
switch fsFormatVersion {
case fsFormatV2:
err = checkFormatSanityFSV2(fsPath)
default:
err = errCorruptedFormat
}
return err
}
// Initializes a new `format.json` if not present, validates `format.json`
// if already present and migrates to newer version if necessary. Returns
// the final format version.
func initFormatFS(fsPath, fsUUID string) (err error) {
fsFormatPath := pathJoin(fsPath, minioMetaBucket, fsFormatJSONFile)
// fsFormatJSONFile - format.json file stored in minioMetaBucket(.minio.sys) directory.
lk, err := lock.LockedOpenFile(preparePath(formatPath), os.O_CREATE|os.O_WRONLY, 0600)
lk, err := lock.LockedOpenFile(preparePath(fsFormatPath), os.O_RDWR|os.O_CREATE, 0600)
if err != nil {
return err
return traceError(err)
}
defer lk.Close()
_, err = lk.Write(metadataBytes)
// Success.
return err
var format = &formatConfigV1{}
_, err = format.ReadFrom(lk)
// For all unexpected errors, we return.
if err != nil && errorCause(err) != io.EOF {
return traceError(fmt.Errorf("Unable to load 'format.json', %s", err))
}
// If we couldn't read anything, The disk is unformatted.
if errorCause(err) == io.EOF {
err = errUnformattedDisk
format = newFSFormatV2()
} else {
// Validate loaded `format.json`.
err = checkFormatFS(format, fsFormatVersion)
if err != nil && err != errFSFormatOld {
return traceError(fmt.Errorf("Unable to validate 'format.json', %s", err))
}
}
// Disk is in old format migrate object metadata.
if err == errFSFormatOld {
if merr := migrateFSObject(fsPath, fsUUID); merr != nil {
return merr
}
// Initialize format v2.
format = newFSFormatV2()
}
// Rewrite or write format.json depending on if disk
// unformatted and if format is old.
if err == errUnformattedDisk || err == errFSFormatOld {
if _, err = format.WriteTo(lk); err != nil {
return traceError(fmt.Errorf("Unable to initialize 'format.json', %s", err))
}
}
// Check for sanity.
return checkFormatSanityFS(fsPath, format.FS.Version)
}
// Return if the part info in uploadedParts and completeParts are same.

4
cmd/fs-v1-metadata_test.go
View File

@ -58,7 +58,7 @@ func TestReadFSMetadata(t *testing.T) {
}
// Construct the full path of fs.json
fsPath := pathJoin("buckets", bucketName, objectName, "fs.json")
fsPath := pathJoin(bucketMetaPrefix, bucketName, objectMetaPrefix, objectName, "fs.json")
fsPath = pathJoin(fs.fsPath, minioMetaBucket, fsPath)
rlk, err := fs.rwPool.Open(fsPath)
@ -95,7 +95,7 @@ func TestWriteFSMetadata(t *testing.T) {
}
// Construct the full path of fs.json
fsPath := pathJoin("buckets", bucketName, objectName, "fs.json")
fsPath := pathJoin(bucketMetaPrefix, bucketName, objectMetaPrefix, objectName, "fs.json")
fsPath = pathJoin(fs.fsPath, minioMetaBucket, fsPath)
rlk, err := fs.rwPool.Open(fsPath)

2
cmd/fs-v1-multipart.go
View File

@ -754,7 +754,7 @@ func (fs fsObjects) CompleteMultipartUpload(bucket string, object string, upload
// Wait for any competing PutObject() operation on bucket/object, since same namespace
// would be acquired for `fs.json`.
fsMetaPath := pathJoin(fs.fsPath, minioMetaBucket, bucketMetaPrefix, bucket, object, fsMetaJSONFile)
fsMetaPath := pathJoin(fs.fsPath, minioMetaBucket, bucketMetaPrefix, bucket, objectMetaPrefix, object, fsMetaJSONFile)
metaFile, err := fs.rwPool.Create(fsMetaPath)
if err != nil {
fs.rwPool.Close(fsMetaPathMultipart)

155
cmd/fs-v1.go
View File

@ -24,6 +24,7 @@ import (
"io"
"io/ioutil"
"os"
"os/signal"
"path/filepath"
"sort"
"syscall"
@ -72,15 +73,117 @@ func initMetaVolumeFS(fsPath, fsUUID string) error {
}
// Migrate FS object is a place holder code for all
// FS format migrations.
func migrateFSObject(fsPath, fsUUID string) (err error) {
// Writing message here is important for servers being upgraded.
log.Println("Please do not stop the server.")
ch := make(chan os.Signal)
defer signal.Stop(ch)
defer close(ch)
signal.Notify(ch, syscall.SIGINT, syscall.SIGTERM)
go func() {
for {
_, ok := <-ch
if !ok {
break
}
log.Println("Please wait server is being upgraded..")
}
}()
return migrateFSFormatV1ToV2(fsPath, fsUUID)
}
// List all buckets at meta bucket prefix in `.minio.sys/buckets/` path.
// This is implemented to avoid a bug on windows with using readDir().
func fsReaddirMetaBuckets(fsPath string) ([]string, error) {
f, err := os.Open(preparePath(pathJoin(fsPath, minioMetaBucket, bucketConfigPrefix)))
if err != nil {
if os.IsNotExist(err) {
return nil, errFileNotFound
} else if os.IsPermission(err) {
return nil, errFileAccessDenied
}
return nil, err
}
return f.Readdirnames(-1)
}
var bucketMetadataConfigs = []string{
bucketNotificationConfig,
bucketListenerConfig,
bucketPolicyConfig,
}
// Attempts to migrate old object metadata files to newer format
//
// i.e
// -------------------------------------------------------
// .minio.sys/buckets/<bucket_name>/<object_path>/fs.json - V1
// -------------------------------------------------------
// .minio.sys/buckets/<bucket_name>/objects/<object_path>/fs.json - V2
// -------------------------------------------------------
//
func migrateFSFormatV1ToV2(fsPath, fsUUID string) (err error) {
metaBucket := pathJoin(fsPath, minioMetaBucket, bucketConfigPrefix)
var buckets []string
buckets, err = fsReaddirMetaBuckets(fsPath)
if err != nil && err != errFileNotFound {
return err
}
// Migrate all buckets present.
for _, bucket := range buckets {
// Temporary bucket of form .UUID-bucket.
tmpBucket := fmt.Sprintf(".%s-%s", fsUUID, bucket)
// Rename existing bucket as `.UUID-bucket`.
if err = fsRenameFile(pathJoin(metaBucket, bucket), pathJoin(metaBucket, tmpBucket)); err != nil {
return err
}
// Create a new bucket name with name as `bucket`.
if err = fsMkdir(pathJoin(metaBucket, bucket)); err != nil {
return err
}
/// Rename all bucket metadata files to newly created `bucket`.
for _, bucketMetaFile := range bucketMetadataConfigs {
if err = fsRenameFile(pathJoin(metaBucket, tmpBucket, bucketMetaFile),
pathJoin(metaBucket, bucket, bucketMetaFile)); err != nil {
if errorCause(err) != errFileNotFound {
return err
}
}
}
// Finally rename the temporary bucket to `bucket/objects` directory.
if err = fsRenameFile(pathJoin(metaBucket, tmpBucket),
pathJoin(metaBucket, bucket, objectMetaPrefix)); err != nil {
if errorCause(err) != errFileNotFound {
return err
}
}
}
log.Printf("Migrating bucket metadata format from \"%s\" to newer format \"%s\"... completed successfully.", fsFormatV1, fsFormatV2)
// If all goes well we return success.
return nil
}
// newFSObjectLayer - initialize new fs object layer.
func newFSObjectLayer(fsPath string) (ObjectLayer, error) {
if fsPath == "" {
return nil, errInvalidArgument
}
var err error
// Disallow relative paths, figure out absolute paths.
fsPath, err = filepath.Abs(fsPath)
fsPath, err := filepath.Abs(fsPath)
if err != nil {
return nil, err
}
@ -108,26 +211,6 @@ func newFSObjectLayer(fsPath string) (ObjectLayer, error) {
return nil, fmt.Errorf("Unable to initialize '.minio.sys' meta volume, %s", err)
}
// Load `format.json`.
format, err := loadFormatFS(fsPath)
if err != nil && err != errUnformattedDisk {
return nil, fmt.Errorf("Unable to load 'format.json', %s", err)
}
// If the `format.json` doesn't exist create one.
if err == errUnformattedDisk {
fsFormatPath := pathJoin(fsPath, minioMetaBucket, fsFormatJSONFile)
// Initialize format.json, if already exists overwrite it.
if serr := saveFormatFS(fsFormatPath, newFSFormatV1()); serr != nil {
return nil, fmt.Errorf("Unable to initialize 'format.json', %s", serr)
}
}
// Validate if we have the same format.
if err == nil && format.Format != "fs" {
return nil, fmt.Errorf("Unable to recognize backend format, Disk is not in FS format. %s", format.Format)
}
// Initialize fs objects.
fs := &fsObjects{
fsPath: fsPath,
@ -141,6 +224,17 @@ func newFSObjectLayer(fsPath string) (ObjectLayer, error) {
},
}
// Initialize `format.json`.
if err = initFormatFS(fsPath, fsUUID); err != nil {
return nil, err
}
// Once initialized hold read lock for the entire operation
// of filesystem backend.
if _, err = fs.rwPool.Open(pathJoin(fsPath, minioMetaBucket, fsFormatJSONFile)); err != nil {
return nil, err
}
// Initialize and load bucket policies.
err = initBucketPolicies(fs)
if err != nil {
@ -159,6 +253,9 @@ func newFSObjectLayer(fsPath string) (ObjectLayer, error) {
// Should be called when process shuts down.
func (fs fsObjects) Shutdown() error {
// Close the format.json read lock.
fs.rwPool.Close(pathJoin(fs.fsPath, minioMetaBucket, fsFormatJSONFile))
// Cleanup and delete tmp uuid.
return fsRemoveAll(pathJoin(fs.fsPath, minioMetaTmpBucket, fs.fsUUID))
}
@ -238,7 +335,7 @@ func (fs fsObjects) ListBuckets() ([]BucketInfo, error) {
return nil, traceError(err)
}
var bucketInfos []BucketInfo
entries, err := readDir(preparePath(fs.fsPath))
entries, err := readDir(fs.fsPath)
if err != nil {
return nil, toObjectErr(traceError(errDiskNotFound))
}
@ -322,7 +419,7 @@ func (fs fsObjects) CopyObject(srcBucket, srcObject, dstBucket, dstObject string
// Check if this request is only metadata update.
cpMetadataOnly := isStringEqual(pathJoin(srcBucket, srcObject), pathJoin(dstBucket, dstObject))
if cpMetadataOnly {
fsMetaPath := pathJoin(fs.fsPath, minioMetaBucket, bucketMetaPrefix, srcBucket, srcObject, fsMetaJSONFile)
fsMetaPath := pathJoin(fs.fsPath, minioMetaBucket, bucketMetaPrefix, srcBucket, objectMetaPrefix, srcObject, fsMetaJSONFile)
var wlk *lock.LockedFile
wlk, err = fs.rwPool.Write(fsMetaPath)
if err != nil {
@ -395,7 +492,7 @@ func (fs fsObjects) GetObject(bucket, object string, offset int64, length int64,
}
if bucket != minioMetaBucket {
fsMetaPath := pathJoin(fs.fsPath, minioMetaBucket, bucketMetaPrefix, bucket, object, fsMetaJSONFile)
fsMetaPath := pathJoin(fs.fsPath, minioMetaBucket, bucketMetaPrefix, bucket, objectMetaPrefix, object, fsMetaJSONFile)
_, err = fs.rwPool.Open(fsMetaPath)
if err != nil && err != errFileNotFound {
return toObjectErr(traceError(err), bucket, object)
@ -437,7 +534,7 @@ func (fs fsObjects) GetObject(bucket, object string, offset int64, length int64,
// getObjectInfo - wrapper for reading object metadata and constructs ObjectInfo.
func (fs fsObjects) getObjectInfo(bucket, object string) (ObjectInfo, error) {
fsMeta := fsMetaV1{}
fsMetaPath := pathJoin(fs.fsPath, minioMetaBucket, bucketMetaPrefix, bucket, object, fsMetaJSONFile)
fsMetaPath := pathJoin(fs.fsPath, minioMetaBucket, bucketMetaPrefix, bucket, objectMetaPrefix, object, fsMetaJSONFile)
// Read `fs.json` to perhaps contend with
// parallel Put() operations.
@ -520,7 +617,7 @@ func (fs fsObjects) PutObject(bucket string, object string, size int64, data io.
var wlk *lock.LockedFile
if bucket != minioMetaBucket {
bucketMetaDir := pathJoin(fs.fsPath, minioMetaBucket, bucketMetaPrefix)
fsMetaPath := pathJoin(bucketMetaDir, bucket, object, fsMetaJSONFile)
fsMetaPath := pathJoin(bucketMetaDir, bucket, objectMetaPrefix, object, fsMetaJSONFile)
wlk, err = fs.rwPool.Create(fsMetaPath)
if err != nil {
return ObjectInfo{}, toObjectErr(traceError(err), bucket, object)
@ -647,7 +744,7 @@ func (fs fsObjects) DeleteObject(bucket, object string) error {
}
minioMetaBucketDir := pathJoin(fs.fsPath, minioMetaBucket)
fsMetaPath := pathJoin(minioMetaBucketDir, bucketMetaPrefix, bucket, object, fsMetaJSONFile)
fsMetaPath := pathJoin(minioMetaBucketDir, bucketMetaPrefix, bucket, objectMetaPrefix, object, fsMetaJSONFile)
if bucket != minioMetaBucket {
rwlk, lerr := fs.rwPool.Write(fsMetaPath)
if lerr == nil {
@ -701,7 +798,7 @@ func (fs fsObjects) listDirFactory(isLeaf isLeafFunc) listDirFunc {
// getObjectETag is a helper function, which returns only the md5sum
// of the file on the disk.
func (fs fsObjects) getObjectETag(bucket, entry string) (string, error) {
fsMetaPath := pathJoin(fs.fsPath, minioMetaBucket, bucketMetaPrefix, bucket, entry, fsMetaJSONFile)
fsMetaPath := pathJoin(fs.fsPath, minioMetaBucket, bucketMetaPrefix, bucket, objectMetaPrefix, entry, fsMetaJSONFile)
// Read `fs.json` to perhaps contend with
// parallel Put() operations.

380
cmd/fs-v1_test.go
View File

@ -22,6 +22,8 @@ import (
"os"
"path/filepath"
"testing"
"github.com/minio/minio/pkg/lock"
)
// TestNewFS - tests initialization of all input disks
@ -85,8 +87,8 @@ func TestFSShutdown(t *testing.T) {
}
}
// TestFSLoadFormatFS - test loadFormatFS with healty and faulty disks
func TestFSLoadFormatFS(t *testing.T) {
// Tests migrating FS format without .minio.sys/buckets.
func TestFSMigrateObjectWithoutObjects(t *testing.T) {
// Prepare for testing
disk := filepath.Join(globalTestTmpDir, "minio-"+nextSuffix())
defer removeAll(disk)
@ -100,13 +102,364 @@ func TestFSLoadFormatFS(t *testing.T) {
}
fsFormatPath := pathJoin(disk, minioMetaBucket, fsFormatJSONFile)
if err := saveFormatFS(preparePath(fsFormatPath), newFSFormatV1()); err != nil {
t.Fatal("Should not fail here", err)
formatCfg := &formatConfigV1{
Version: "1",
Format: "fs",
FS: &fsFormat{
Version: "1",
},
}
_, err := loadFormatFS(disk)
lk, err := lock.LockedOpenFile(preparePath(fsFormatPath), os.O_RDWR|os.O_CREATE, 0600)
if err != nil {
t.Fatal(err)
}
_, err = formatCfg.WriteTo(lk)
lk.Close()
if err != nil {
t.Fatal("Should not fail here", err)
}
if err = initFormatFS(disk, uuid); err != nil {
t.Fatal("Should not fail with unexpected", err)
}
formatCfg = &formatConfigV1{}
lk, err = lock.LockedOpenFile(preparePath(fsFormatPath), os.O_RDONLY, 0600)
if err != nil {
t.Fatal(err)
}
_, err = formatCfg.ReadFrom(lk)
lk.Close()
if err != nil {
t.Fatal("Should not fail here", err)
}
if formatCfg.FS.Version != fsFormatV2 {
t.Fatalf("Unexpected version detected expected \"%s\", got %s", fsFormatV2, formatCfg.FS.Version)
}
}
// Tests migrating FS format without .minio.sys/buckets.
func TestFSMigrateObjectWithErr(t *testing.T) {
// Prepare for testing
disk := filepath.Join(globalTestTmpDir, "minio-"+nextSuffix())
defer removeAll(disk)
// Assign a new UUID.
uuid := mustGetUUID()
// Initialize meta volume, if volume already exists ignores it.
if err := initMetaVolumeFS(disk, uuid); err != nil {
t.Fatal(err)
}
fsFormatPath := pathJoin(disk, minioMetaBucket, fsFormatJSONFile)
formatCfg := &formatConfigV1{
Version: "1",
Format: "fs",
FS: &fsFormat{
Version: "10",
},
}
lk, err := lock.LockedOpenFile(preparePath(fsFormatPath), os.O_RDWR|os.O_CREATE, 0600)
if err != nil {
t.Fatal(err)
}
_, err = formatCfg.WriteTo(lk)
lk.Close()
if err != nil {
t.Fatal("Should not fail here", err)
}
if err = initFormatFS(disk, uuid); err != nil {
if errorCause(err).Error() !=
"Unable to validate 'format.json', corrupted backend format" {
t.Fatal("Should not fail with unexpected", err)
}
}
fsFormatPath = pathJoin(disk, minioMetaBucket, fsFormatJSONFile)
formatCfg = &formatConfigV1{
Version: "1",
Format: "garbage",
FS: &fsFormat{
Version: "1",
},
}
lk, err = lock.LockedOpenFile(preparePath(fsFormatPath), os.O_RDWR|os.O_CREATE, 0600)
if err != nil {
t.Fatal(err)
}
_, err = formatCfg.WriteTo(lk)
lk.Close()
if err != nil {
t.Fatal("Should not fail here", err)
}
if err = initFormatFS(disk, uuid); err != nil {
if errorCause(err).Error() !=
"Unable to validate 'format.json', Unable to recognize backend format, Disk is not in FS format. garbage" {
t.Fatal("Should not fail with unexpected", err)
}
}
}
// Tests migrating FS format with .minio.sys/buckets filled with
// object metadata.
func TestFSMigrateObjectWithObjects(t *testing.T) {
// Prepare for testing
disk := filepath.Join(globalTestTmpDir, "minio-"+nextSuffix())
defer removeAll(disk)
// Assign a new UUID.
uuid := mustGetUUID()
// Initialize meta volume, if volume already exists ignores it.
if err := initMetaVolumeFS(disk, uuid); err != nil {
t.Fatal(err)
}
fsFormatPath := pathJoin(disk, minioMetaBucket, fsFormatJSONFile)
formatCfg := &formatConfigV1{
Version: "1",
Format: "fs",
FS: &fsFormat{
Version: "1",
},
}
lk, err := lock.LockedOpenFile(preparePath(fsFormatPath), os.O_RDWR|os.O_CREATE, 0600)
if err != nil {
t.Fatal(err)
}
_, err = formatCfg.WriteTo(lk)
lk.Close()
if err != nil {
t.Fatal("Should not fail here", err)
}
// Construct the full path of fs.json
fsPath1 := pathJoin(bucketMetaPrefix, "testvolume1", "my-object1", fsMetaJSONFile)
fsPath1 = pathJoin(disk, minioMetaBucket, fsPath1)
fsMetaJSON := `{"version":"1.0.0","format":"fs","minio":{"release":"DEVELOPMENT.2017-03-27T02-26-33Z"},"meta":{"md5Sum":"467886be95c8ecfd71a2900e3f461b4f"}`
if _, err = fsCreateFile(fsPath1, bytes.NewReader([]byte(fsMetaJSON)), nil, 0); err != nil {
t.Fatal(err)
}
// Construct the full path of fs.json
fsPath2 := pathJoin(bucketMetaPrefix, "testvolume2", "my-object2", fsMetaJSONFile)
fsPath2 = pathJoin(disk, minioMetaBucket, fsPath2)
fsMetaJSON = `{"version":"1.0.0","format":"fs","minio":{"release":"DEVELOPMENT.2017-03-27T02-26-33Z"},"meta":{"md5Sum":"467886be95c8ecfd71a2900eff461b4d"}`
if _, err = fsCreateFile(fsPath2, bytes.NewReader([]byte(fsMetaJSON)), nil, 0); err != nil {
t.Fatal(err)
}
// Construct the full path of policy.json
ppath := pathJoin(bucketMetaPrefix, "testvolume2", bucketPolicyConfig)
ppath = pathJoin(disk, minioMetaBucket, ppath)
policyJSON := `{"Version":"2012-10-17","Statement":[{"Action":["s3:GetBucketLocation","s3:ListBucket"],"Effect":"Allow","Principal":{"AWS":["*"]},"Resource":["arn:aws:s3:::testbucket"],"Sid":""},{"Action":["s3:GetObject"],"Effect":"Allow","Principal":{"AWS":["*"]},"Resource":["arn:aws:s3:::testbucket/*"],"Sid":""}]}`
if _, err = fsCreateFile(ppath, bytes.NewReader([]byte(policyJSON)), nil, 0); err != nil {
t.Fatal(err)
}
if err = initFormatFS(disk, mustGetUUID()); err != nil {
t.Fatal("Should not fail here", err)
}
fsPath2 = pathJoin(bucketMetaPrefix, "testvolume2", objectMetaPrefix, "my-object2", fsMetaJSONFile)
fsPath2 = pathJoin(disk, minioMetaBucket, fsPath2)
fi, err := fsStatFile(fsPath2)
if err != nil {
t.Fatal("Path should exist and accessible after migration", err)
}
if fi.IsDir() {
t.Fatalf("Unexpected path %s should be a file", fsPath2)
}
formatCfg = &formatConfigV1{}
lk, err = lock.LockedOpenFile(preparePath(fsFormatPath), os.O_RDONLY, 0600)
if err != nil {
t.Fatal(err)
}
_, err = formatCfg.ReadFrom(lk)
lk.Close()
if err != nil {
t.Fatal("Should not fail here", err)
}
if formatCfg.FS.Version != fsFormatV2 {
t.Fatalf("Unexpected version detected expected \"%s\", got %s", fsFormatV2, formatCfg.FS.Version)
}
ppath = pathJoin(bucketMetaPrefix, "testvolume2", "acl.json")
ppath = pathJoin(disk, minioMetaBucket, ppath)
if _, err = fsCreateFile(ppath, bytes.NewReader([]byte("")), nil, 0); err != nil {
t.Fatal(err)
}
if err = initFormatFS(disk, mustGetUUID()); errorCause(err) != errCorruptedFormat {
t.Fatal("Should not fail here", err)
}
}
// TestFSCheckFormatFSErr - test loadFormatFS loading older format.
func TestFSCheckFormatFSErr(t *testing.T) {
// Prepare for testing
disk := filepath.Join(globalTestTmpDir, "minio-"+nextSuffix())
defer removeAll(disk)
// Assign a new UUID.
uuid := mustGetUUID()
// Initialize meta volume, if volume already exists ignores it.
if err := initMetaVolumeFS(disk, uuid); err != nil {
t.Fatal(err)
}
fsFormatPath := pathJoin(disk, minioMetaBucket, fsFormatJSONFile)
formatCfg := &formatConfigV1{
Version: "1",
Format: "fs",
FS: &fsFormat{
Version: "1",
},
}
lk, err := lock.LockedOpenFile(preparePath(fsFormatPath), os.O_RDWR|os.O_CREATE, 0600)
if err != nil {
t.Fatal(err)
}
_, err = formatCfg.WriteTo(lk)
lk.Close()
if err != nil {
t.Fatal(err)
}
formatCfg = &formatConfigV1{}
lk, err = lock.LockedOpenFile(preparePath(fsFormatPath), os.O_RDWR|os.O_CREATE, 0600)
if err != nil {
t.Fatal(err)
}
_, err = formatCfg.ReadFrom(lk)
lk.Close()
if err != nil {
t.Fatal(err)
}
if err = checkFormatFS(formatCfg, fsFormatVersion); errorCause(err) != errFSFormatOld {
t.Fatal("Should not fail with unexpected", err)
}
formatCfg = &formatConfigV1{
Version: "1",
Format: "fs",
FS: &fsFormat{
Version: "10",
},
}
lk, err = lock.LockedOpenFile(preparePath(fsFormatPath), os.O_RDWR|os.O_CREATE, 0600)
if err != nil {
t.Fatal(err)
}
_, err = formatCfg.WriteTo(lk)
lk.Close()
if err != nil {
t.Fatal(err)
}
if err = checkFormatFS(formatCfg, fsFormatVersion); errorCause(err) != errCorruptedFormat {
t.Fatal("Should not fail with unexpected", err)
}
formatCfg = &formatConfigV1{
Version: "1",
Format: "garbage",
FS: &fsFormat{
Version: "1",
},
}
lk, err = lock.LockedOpenFile(preparePath(fsFormatPath), os.O_RDWR|os.O_CREATE, 0600)
if err != nil {
t.Fatal(err)
}
_, err = formatCfg.WriteTo(lk)
lk.Close()
if err != nil {
t.Fatal(err)
}
if err = checkFormatFS(formatCfg, fsFormatVersion); err != nil {
if errorCause(err).Error() != "Unable to recognize backend format, Disk is not in FS format. garbage" {
t.Fatal("Should not fail with unexpected", err)
}
}
if err = checkFormatFS(nil, fsFormatVersion); errorCause(err) != errUnexpected {
t.Fatal("Should fail with errUnexpected, but found", err)
}
formatCfg = &formatConfigV1{
Version: "1",
Format: "fs",
FS: &fsFormat{
Version: "2",
},
}
lk, err = lock.LockedOpenFile(preparePath(fsFormatPath), os.O_RDWR|os.O_CREATE, 0600)
if err != nil {
t.Fatal(err)
}
_, err = formatCfg.WriteTo(lk)
lk.Close()
if err != nil {
t.Fatal(err)
}
// Should not fail.
if err = checkFormatFS(formatCfg, fsFormatVersion); err != nil {
t.Fatal(err)
}
}
// TestFSCheckFormatFS - test loadFormatFS with healty and faulty disks
func TestFSCheckFormatFS(t *testing.T) {
// Prepare for testing
disk := filepath.Join(globalTestTmpDir, "minio-"+nextSuffix())
defer removeAll(disk)
// Assign a new UUID.
uuid := mustGetUUID()
// Initialize meta volume, if volume already exists ignores it.
if err := initMetaVolumeFS(disk, uuid); err != nil {
t.Fatal(err)
}
fsFormatPath := pathJoin(disk, minioMetaBucket, fsFormatJSONFile)
lk, err := lock.LockedOpenFile(preparePath(fsFormatPath), os.O_RDWR|os.O_CREATE, 0600)
if err != nil {
t.Fatal(err)
}
format := newFSFormatV2()
_, err = format.WriteTo(lk)
lk.Close()
if err != nil {
t.Fatal(err)
}
// Loading corrupted format file
file, err := os.OpenFile(preparePath(fsFormatPath), os.O_APPEND|os.O_WRONLY|os.O_CREATE, 0666)
if err != nil {
@ -114,15 +467,24 @@ func TestFSLoadFormatFS(t *testing.T) {
}
file.Write([]byte{'b'})
file.Close()
_, err = loadFormatFS(disk)
lk, err = lock.LockedOpenFile(preparePath(fsFormatPath), os.O_RDWR|os.O_CREATE, 0600)
if err != nil {
t.Fatal(err)
}
format = &formatConfigV1{}
_, err = format.ReadFrom(lk)
lk.Close()
if err == nil {
t.Fatal("Should return an error here")
}
// Loading format file from disk not found.
removeAll(disk)
_, err = loadFormatFS(disk)
if err != nil && err != errUnformattedDisk {
t.Fatal("Should return unformatted disk, but got", err)
_, err = lock.LockedOpenFile(preparePath(fsFormatPath), os.O_RDONLY, 0600)
if err != nil && !os.IsNotExist(err) {
t.Fatal("Should return 'format.json' does not exist, but got", err)
}
}

3
cmd/object-api-common.go
View File

@ -32,6 +32,9 @@ const (
// Buckets meta prefix.
bucketMetaPrefix = "buckets"
// Objects meta prefix.
objectMetaPrefix = "objects"
// Md5Sum of empty string.
emptyStrMd5Sum = "d41d8cd98f00b204e9800998ecf8427e"
)

2
cmd/posix-list-dir-others.go
View File

@ -32,6 +32,8 @@ func readDir(dirPath string) (entries []string, err error) {
// File is really not found.
if os.IsNotExist(err) {
return nil, errFileNotFound
} else if os.IsPermission(err) {
return nil, errFileAccessDenied
}
// File path cannot be verified since one of the parents is a file.

2
cmd/posix.go
View File

@ -291,7 +291,7 @@ func (s *posix) ListVols() (volsInfo []VolInfo, err error) {
return nil, err
}
volsInfo, err = listVols(preparePath(s.diskPath))
volsInfo, err = listVols(s.diskPath)
if err != nil {
return nil, err
}

2
cmd/service.go
View File

@ -82,7 +82,7 @@ func (m *ServerMux) handleServiceSignals() error {
// Wait for SIGTERM in a go-routine.
trapCh := signalTrap(os.Interrupt, syscall.SIGTERM)
go func(<-chan bool) {
go func(trapCh <-chan bool) {
<-trapCh
globalServiceSignalCh <- serviceStop
}(trapCh)

4
docs/shared-backend/DESIGN.md
View File

@ -81,7 +81,7 @@ An example here shows how the contention is handled with GetObject().
GetObject() holds a read lock on `fs.json`.
```go
fsMetaPath := pathJoin(fs.fsPath, minioMetaBucket, bucketMetaPrefix, bucket, object, fsMetaJSONFile)
fsMetaPath := pathJoin(fs.fsPath, minioMetaBucket, bucketMetaPrefix, bucket, objectMetaPrefix, object, fsMetaJSONFile)
rlk, err := fs.rwPool.Open(fsMetaPath)
if err != nil {
return toObjectErr(traceError(err), bucket, object)
@ -98,7 +98,7 @@ GetObject() holds a read lock on `fs.json`.
A concurrent PutObject is requested on the same object, PutObject() attempts a write lock on `fs.json`.
```go
fsMetaPath := pathJoin(fs.fsPath, minioMetaBucket, bucketMetaPrefix, bucket, object, fsMetaJSONFile)
fsMetaPath := pathJoin(fs.fsPath, minioMetaBucket, bucketMetaPrefix, bucket, objectMetaPrefix, object, fsMetaJSONFile)
wlk, err := fs.rwPool.Create(fsMetaPath)
if err != nil {
return ObjectInfo{}, toObjectErr(err, bucket, object)