New donut driver with local file encoding
This commit is contained in:
Frederick F. Kautz IV
parent
d92a179cbc
commit
933d44c656
14
pkg/storage/donut/bucketdriver.go
Normal file
14
pkg/storage/donut/bucketdriver.go
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@ -0,0 +1,14 @@
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package donut
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type bucketDriver struct {
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nodes []string
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objects map[string][]byte
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}
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func (self bucketDriver) GetNodes() ([]string, error) {
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var nodes []string
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for _, node := range self.nodes {
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nodes = append(nodes, node)
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}
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return nodes, nil
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}
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@ -7,39 +7,39 @@ import "io"
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// Donut interface
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type Donut interface {
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CreateBucket(bucket string) error
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GetBuckets() ([]string, error)
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GetObject(bucket, object string) (io.ReadCloser, error)
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GetObjectMetadata(bucket, object string) (map[string]string, error)
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ListBuckets() ([]string, error)
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GetObjectWriter(bucket, object string) (ObjectWriter, error)
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GetObject(bucket, object string) (io.ReadCloser, error)
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// GetObjectMetadata(bucket, object string) (map[string]string, error)
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// GetObjectWriter(bucket, object string) (ObjectWriter, error)
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// ListObjects(bucket string) ([]string, error)
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}
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// Bucket is an interface for managing buckets
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// Bucket interface
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type Bucket interface {
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GetObject(object string) (io.Reader, error)
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GetObjectMetadata(object string) (map[string]string, error)
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GetObjectWriter(object string) (ObjectWriter, error)
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GetObjects() ([]string, error)
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GetNodes() ([]string, error)
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}
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// Disk is an interface for managing disks
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type Disk interface {
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GetBuckets(object string) ([]string, error)
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type Node interface {
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GetBuckets() ([]string, error)
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GetWriter(bucket, object string) (DonutWriter, error)
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GetReader(bucket, object string) (io.ReadCloser, error)
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GetMetadata(bucket, object string) (map[string]string, error)
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GetDonutMetadata(bucket, object string) (map[string]string, error)
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}
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// ObjectWriter is an interface for writing new objects
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// ObjectWriter interface
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type ObjectWriter interface {
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Write([]byte) error
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Write([]byte) (int, error)
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Close() error
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CloseWithError(error) error
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SetMetadata(map[string]string)
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GetMetadata() map[string]string
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SetMetadata(map[string]string) error
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GetMetadata() (map[string]string, error)
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}
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// InternalObjectWriter is an interface for use internally to donut
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type InternalObjectWriter interface {
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type DonutWriter interface {
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ObjectWriter
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SetDonutMetadata(map[string]string)
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GetDonutMetadata() map[string]string
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GetDonutMetadata() (map[string]string, error)
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SetDonutMetadata(map[string]string) error
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}
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@ -1,48 +1,374 @@
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package donut
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import (
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"bytes"
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"encoding/gob"
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"encoding/json"
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"errors"
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"github.com/minio-io/minio/pkg/encoding/erasure"
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"github.com/minio-io/minio/pkg/utils/split"
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"io"
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"io/ioutil"
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"log"
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"os"
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"path"
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"sort"
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"strconv"
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"strings"
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"time"
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)
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type donutDriver struct {
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buckets map[string]Bucket
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disks map[string]Disk
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nodes map[string]Node
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}
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// NewDonutDriver instantiates a donut driver for use in object storage
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func NewDonutDriver() Donut {
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return donutDriver{
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func NewDonutDriver(root string) Donut {
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nodes := make(map[string]Node)
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nodes["localhost"] = localDirectoryNode{root: root}
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driver := donutDriver{
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buckets: make(map[string]Bucket),
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disks: make(map[string]Disk),
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nodes: nodes,
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}
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return driver
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}
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func notImplemented() error {
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return errors.New("Not Implemented")
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func (driver donutDriver) CreateBucket(bucketName string) error {
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if _, ok := driver.buckets[bucketName]; ok == false {
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bucketName = strings.TrimSpace(bucketName)
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if bucketName == "" {
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return errors.New("Cannot create bucket with no name")
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}
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// assign nodes
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// TODO assign other nodes
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nodes := make([]string, 16)
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for i := 0; i < 16; i++ {
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nodes[i] = "localhost"
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}
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bucket := bucketDriver{
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nodes: nodes,
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}
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driver.buckets[bucketName] = bucket
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return nil
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}
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return errors.New("Bucket exists")
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}
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// CreateBucket creates a bucket
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func (driver donutDriver) CreateBucket(bucket string) error {
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return notImplemented()
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func (driver donutDriver) ListBuckets() ([]string, error) {
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buckets := make([]string, 0)
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for bucket, _ := range driver.buckets {
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buckets = append(buckets, bucket)
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}
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sort.Strings(buckets)
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return buckets, nil
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}
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// GetBuckets returns a list of buckets
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func (driver donutDriver) GetBuckets() ([]string, error) {
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return nil, notImplemented()
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func (driver donutDriver) GetObjectWriter(bucketName, objectName string) (ObjectWriter, error) {
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if bucket, ok := driver.buckets[bucketName]; ok == true {
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writers := make([]DonutWriter, 16)
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nodes, err := bucket.GetNodes()
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if err != nil {
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return nil, err
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}
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for i, nodeId := range nodes {
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if node, ok := driver.nodes[nodeId]; ok == true {
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writer, _ := node.GetWriter(bucketName+":0:"+strconv.Itoa(i), objectName)
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writers[i] = writer
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}
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}
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return newErasureWriter(writers), nil
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}
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return nil, errors.New("Bucket not found")
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}
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// GetObject returns an object
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func (driver donutDriver) GetObject(bucket, object string) (io.ReadCloser, error) {
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return nil, notImplemented()
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func (driver donutDriver) GetObject(bucketName, objectName string) (io.ReadCloser, error) {
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r, w := io.Pipe()
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if bucket, ok := driver.buckets[bucketName]; ok == true {
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readers := make([]io.ReadCloser, 16)
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nodes, err := bucket.GetNodes()
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if err != nil {
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return nil, err
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}
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var metadata map[string]string
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for i, nodeId := range nodes {
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if node, ok := driver.nodes[nodeId]; ok == true {
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bucketId := bucketName + ":0:" + strconv.Itoa(i)
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reader, err := node.GetReader(bucketId, objectName)
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if err != nil {
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return nil, err
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}
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readers[i] = reader
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if metadata == nil {
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metadata, err = node.GetDonutMetadata(bucketId, objectName)
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if err != nil {
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return nil, err
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}
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}
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}
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}
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go erasureReader(readers, metadata, w)
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return r, nil
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}
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return nil, errors.New("Bucket not found")
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}
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// GetObjectMetadata returns object metadata
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func (driver donutDriver) GetObjectMetadata(bucket, object string) (map[string]string, error) {
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return nil, notImplemented()
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func erasureReader(readers []io.ReadCloser, donutMetadata map[string]string, writer *io.PipeWriter) {
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totalChunks, _ := strconv.Atoi(donutMetadata["chunkCount"])
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totalLeft, _ := strconv.Atoi(donutMetadata["totalLength"])
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blockSize, _ := strconv.Atoi(donutMetadata["blockSize"])
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params, _ := erasure.ParseEncoderParams(8, 8, erasure.Cauchy)
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encoder := erasure.NewEncoder(params)
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for _, reader := range readers {
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defer reader.Close()
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}
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for i := 0; i < totalChunks; i++ {
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encodedBytes := make([][]byte, 16)
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for i, reader := range readers {
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var bytesArray []byte
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decoder := gob.NewDecoder(reader)
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err := decoder.Decode(&bytesArray)
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if err != nil {
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log.Println(err)
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}
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encodedBytes[i] = bytesArray
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}
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curBlockSize := totalLeft
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if blockSize < totalLeft {
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curBlockSize = blockSize
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}
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log.Println("decoding block size", curBlockSize)
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decodedData, err := encoder.Decode(encodedBytes, curBlockSize)
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if err != nil {
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writer.CloseWithError(err)
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return
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}
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io.Copy(writer, bytes.NewBuffer(decodedData))
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totalLeft = totalLeft - blockSize
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}
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writer.Close()
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}
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// GetObjectWriter returns a writer for creating a new object.
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func (driver donutDriver) GetObjectWriter(bucket, object string) (ObjectWriter, error) {
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return nil, notImplemented()
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// erasure writer
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type erasureWriter struct {
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writers []DonutWriter
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metadata map[string]string
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donutMetadata map[string]string // not exposed
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erasureWriter *io.PipeWriter
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isClosed <-chan bool
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}
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func newErasureWriter(writers []DonutWriter) ObjectWriter {
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r, w := io.Pipe()
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isClosed := make(chan bool)
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writer := erasureWriter{
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writers: writers,
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metadata: make(map[string]string),
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erasureWriter: w,
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isClosed: isClosed,
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}
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go erasureGoroutine(r, writer, isClosed)
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return writer
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}
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func erasureGoroutine(r *io.PipeReader, eWriter erasureWriter, isClosed chan<- bool) {
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chunks := split.Stream(r, 10*1024*1024)
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params, _ := erasure.ParseEncoderParams(8, 8, erasure.Cauchy)
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encoder := erasure.NewEncoder(params)
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chunkCount := 0
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totalLength := 0
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for chunk := range chunks {
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if chunk.Err == nil {
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totalLength = totalLength + len(chunk.Data)
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encodedBlocks, _ := encoder.Encode(chunk.Data)
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for blockIndex, block := range encodedBlocks {
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var byteBuffer bytes.Buffer
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gobEncoder := gob.NewEncoder(&byteBuffer)
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gobEncoder.Encode(block)
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io.Copy(eWriter.writers[blockIndex], &byteBuffer)
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}
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}
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chunkCount = chunkCount + 1
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}
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metadata := make(map[string]string)
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metadata["blockSize"] = strconv.Itoa(10 * 1024 * 1024)
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metadata["chunkCount"] = strconv.Itoa(chunkCount)
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metadata["created"] = time.Now().Format(time.RFC3339Nano)
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metadata["erasureK"] = "8"
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metadata["erasureM"] = "8"
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metadata["erasureTechnique"] = "Cauchy"
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metadata["totalLength"] = strconv.Itoa(totalLength)
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for _, nodeWriter := range eWriter.writers {
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if nodeWriter != nil {
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nodeWriter.SetMetadata(eWriter.metadata)
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nodeWriter.SetDonutMetadata(metadata)
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nodeWriter.Close()
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}
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}
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isClosed <- true
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}
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func (self erasureWriter) Write(data []byte) (int, error) {
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io.Copy(self.erasureWriter, bytes.NewBuffer(data))
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return len(data), nil
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}
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func (self erasureWriter) Close() error {
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self.erasureWriter.Close()
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<-self.isClosed
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return nil
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}
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func (self erasureWriter) CloseWithError(err error) error {
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for _, writer := range self.writers {
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if writer != nil {
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writer.CloseWithError(err)
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}
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}
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return nil
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}
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func (self erasureWriter) SetMetadata(metadata map[string]string) error {
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for k, _ := range self.metadata {
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delete(self.metadata, k)
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}
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for k, v := range metadata {
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self.metadata[k] = v
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}
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return nil
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}
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func (self erasureWriter) GetMetadata() (map[string]string, error) {
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metadata := make(map[string]string)
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for k, v := range self.metadata {
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metadata[k] = v
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}
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return metadata, nil
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}
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type localDirectoryNode struct {
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root string
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}
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func (self localDirectoryNode) GetBuckets() ([]string, error) {
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return nil, errors.New("Not Implemented")
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}
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func (self localDirectoryNode) GetWriter(bucket, object string) (DonutWriter, error) {
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objectPath := path.Join(self.root, bucket, object)
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err := os.MkdirAll(objectPath, 0700)
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if err != nil {
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return nil, err
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}
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return newDonutFileWriter(objectPath)
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}
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func (self localDirectoryNode) GetReader(bucket, object string) (io.ReadCloser, error) {
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return os.Open(path.Join(self.root, bucket, object, "data"))
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}
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func (self localDirectoryNode) GetMetadata(bucket, object string) (map[string]string, error) {
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return self.getMetadata(bucket, object, "metadata.json")
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}
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func (self localDirectoryNode) GetDonutMetadata(bucket, object string) (map[string]string, error) {
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return self.getMetadata(bucket, object, "donutMetadata.json")
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}
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func (self localDirectoryNode) getMetadata(bucket, object, fileName string) (map[string]string, error) {
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file, err := os.Open(path.Join(self.root, bucket, object, fileName))
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defer file.Close()
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if err != nil {
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return nil, err
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}
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metadata := make(map[string]string)
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decoder := json.NewDecoder(file)
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if err := decoder.Decode(&metadata); err != nil {
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return nil, err
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}
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return metadata, nil
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}
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func newDonutFileWriter(objectDir string) (DonutWriter, error) {
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dataFile, err := os.OpenFile(path.Join(objectDir, "data"), os.O_WRONLY|os.O_CREATE, 0600)
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if err != nil {
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return nil, err
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}
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return donutFileWriter{
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root: objectDir,
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file: dataFile,
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metadata: make(map[string]string),
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donutMetadata: make(map[string]string),
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}, nil
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}
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type donutFileWriter struct {
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root string
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file *os.File
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metadata map[string]string
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donutMetadata map[string]string
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err error
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}
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func (self donutFileWriter) Write(data []byte) (int, error) {
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return self.file.Write(data)
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}
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func (self donutFileWriter) Close() error {
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if self.err != nil {
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return self.err
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}
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self.file.Close()
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metadata, _ := json.Marshal(self.metadata)
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ioutil.WriteFile(path.Join(self.root, "metadata.json"), metadata, 0600)
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donutMetadata, _ := json.Marshal(self.donutMetadata)
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ioutil.WriteFile(path.Join(self.root, "donutMetadata.json"), donutMetadata, 0600)
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return nil
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}
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func (self donutFileWriter) CloseWithError(err error) error {
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if self.err != nil {
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self.err = err
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}
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self.file.Close()
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return nil
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}
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func (self donutFileWriter) SetMetadata(metadata map[string]string) error {
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for k := range self.metadata {
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delete(self.metadata, k)
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}
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for k, v := range metadata {
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self.metadata[k] = v
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}
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return nil
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}
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func (self donutFileWriter) GetMetadata() (map[string]string, error) {
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metadata := make(map[string]string)
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for k, v := range self.metadata {
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metadata[k] = v
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}
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return metadata, nil
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}
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func (self donutFileWriter) SetDonutMetadata(metadata map[string]string) error {
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for k := range self.donutMetadata {
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delete(self.donutMetadata, k)
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}
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for k, v := range metadata {
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self.donutMetadata[k] = v
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}
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return nil
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}
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func (self donutFileWriter) GetDonutMetadata() (map[string]string, error) {
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donutMetadata := make(map[string]string)
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for k, v := range self.donutMetadata {
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donutMetadata[k] = v
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}
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return donutMetadata, nil
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}
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197
pkg/storage/donut/donutdriver_test.go
Normal file
197
pkg/storage/donut/donutdriver_test.go
Normal file
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@ -0,0 +1,197 @@
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package donut
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import (
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"testing"
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"bytes"
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. "gopkg.in/check.v1"
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"io"
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"io/ioutil"
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"os"
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)
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func Test(t *testing.T) { TestingT(t) }
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type MySuite struct{}
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var _ = Suite(&MySuite{})
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func (s *MySuite) TestEmptyBucket(c *C) {
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root, err := ioutil.TempDir(os.TempDir(), "donut-")
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c.Assert(err, IsNil)
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defer os.RemoveAll(root)
|
||||
donut := NewDonutDriver(root)
|
||||
|
||||
// check buckets are empty
|
||||
buckets, err := donut.ListBuckets()
|
||||
c.Assert(err, IsNil)
|
||||
c.Assert(buckets, DeepEquals, make([]string, 0))
|
||||
}
|
||||
|
||||
func (s *MySuite) TestBucketWithoutNameFails(c *C) {
|
||||
root, err := ioutil.TempDir(os.TempDir(), "donut-")
|
||||
c.Assert(err, IsNil)
|
||||
defer os.RemoveAll(root)
|
||||
donut := NewDonutDriver(root)
|
||||
// fail to create new bucket without a name
|
||||
err = donut.CreateBucket("")
|
||||
c.Assert(err, Not(IsNil))
|
||||
|
||||
err = donut.CreateBucket(" ")
|
||||
c.Assert(err, Not(IsNil))
|
||||
}
|
||||
|
||||
func (s *MySuite) TestCreateBucketAndList(c *C) {
|
||||
root, err := ioutil.TempDir(os.TempDir(), "donut-")
|
||||
c.Assert(err, IsNil)
|
||||
defer os.RemoveAll(root)
|
||||
donut := NewDonutDriver(root)
|
||||
// create bucket
|
||||
err = donut.CreateBucket("foo")
|
||||
c.Assert(err, IsNil)
|
||||
|
||||
// check bucket exists
|
||||
buckets, err := donut.ListBuckets()
|
||||
c.Assert(err, IsNil)
|
||||
c.Assert(buckets, DeepEquals, []string{"foo"})
|
||||
}
|
||||
|
||||
func (s *MySuite) TestCreateBucketWithSameNameFails(c *C) {
|
||||
root, err := ioutil.TempDir(os.TempDir(), "donut-")
|
||||
c.Assert(err, IsNil)
|
||||
defer os.RemoveAll(root)
|
||||
donut := NewDonutDriver(root)
|
||||
err = donut.CreateBucket("foo")
|
||||
c.Assert(err, IsNil)
|
||||
|
||||
err = donut.CreateBucket("foo")
|
||||
c.Assert(err, Not(IsNil))
|
||||
}
|
||||
|
||||
func (s *MySuite) TestCreateMultipleBucketsAndList(c *C) {
|
||||
root, err := ioutil.TempDir(os.TempDir(), "donut-")
|
||||
c.Assert(err, IsNil)
|
||||
defer os.RemoveAll(root)
|
||||
donut := NewDonutDriver(root)
|
||||
// add a second bucket
|
||||
err = donut.CreateBucket("foo")
|
||||
c.Assert(err, IsNil)
|
||||
|
||||
err = donut.CreateBucket("bar")
|
||||
c.Assert(err, IsNil)
|
||||
|
||||
buckets, err := donut.ListBuckets()
|
||||
c.Assert(err, IsNil)
|
||||
c.Assert(buckets, DeepEquals, []string{"bar", "foo"})
|
||||
|
||||
err = donut.CreateBucket("foobar")
|
||||
c.Assert(err, IsNil)
|
||||
|
||||
buckets, err = donut.ListBuckets()
|
||||
c.Assert(err, IsNil)
|
||||
c.Assert(buckets, DeepEquals, []string{"bar", "foo", "foobar"})
|
||||
}
|
||||
|
||||
func (s *MySuite) TestNewObjectFailsWithoutBucket(c *C) {
|
||||
root, err := ioutil.TempDir(os.TempDir(), "donut-")
|
||||
c.Assert(err, IsNil)
|
||||
defer os.RemoveAll(root)
|
||||
donut := NewDonutDriver(root)
|
||||
|
||||
writer, err := donut.GetObjectWriter("foo", "obj")
|
||||
c.Assert(err, Not(IsNil))
|
||||
c.Assert(writer, IsNil)
|
||||
}
|
||||
|
||||
func (s *MySuite) TestNewObjectFailsWithEmptyName(c *C) {
|
||||
root, err := ioutil.TempDir(os.TempDir(), "donut-")
|
||||
c.Assert(err, IsNil)
|
||||
defer os.RemoveAll(root)
|
||||
donut := NewDonutDriver(root)
|
||||
|
||||
writer, err := donut.GetObjectWriter("foo", "")
|
||||
c.Assert(err, Not(IsNil))
|
||||
c.Assert(writer, IsNil)
|
||||
|
||||
writer, err = donut.GetObjectWriter("foo", " ")
|
||||
c.Assert(err, Not(IsNil))
|
||||
c.Assert(writer, IsNil)
|
||||
}
|
||||
|
||||
func (s *MySuite) TestNewObjectCanBeWritten(c *C) {
|
||||
root, err := ioutil.TempDir(os.TempDir(), "donut-")
|
||||
c.Assert(err, IsNil)
|
||||
defer os.RemoveAll(root)
|
||||
donut := NewDonutDriver(root)
|
||||
|
||||
err = donut.CreateBucket("foo")
|
||||
c.Assert(err, IsNil)
|
||||
|
||||
writer, err := donut.GetObjectWriter("foo", "obj")
|
||||
c.Assert(err, IsNil)
|
||||
|
||||
data := "Hello World"
|
||||
length, err := writer.Write([]byte(data))
|
||||
c.Assert(length, Equals, len(data))
|
||||
|
||||
expectedMetadata := map[string]string{
|
||||
"foo": "bar",
|
||||
"created": "one",
|
||||
"hello": "world",
|
||||
}
|
||||
|
||||
err = writer.SetMetadata(expectedMetadata)
|
||||
c.Assert(err, IsNil)
|
||||
|
||||
err = writer.Close()
|
||||
c.Assert(err, IsNil)
|
||||
|
||||
actualWriterMetadata, err := writer.GetMetadata()
|
||||
c.Assert(err, IsNil)
|
||||
c.Assert(actualWriterMetadata, DeepEquals, expectedMetadata)
|
||||
|
||||
c.Assert(err, IsNil)
|
||||
|
||||
reader, err := donut.GetObject("foo", "obj")
|
||||
c.Assert(err, IsNil)
|
||||
|
||||
var actualData bytes.Buffer
|
||||
_, err = io.Copy(&actualData, reader)
|
||||
c.Assert(err, IsNil)
|
||||
c.Assert(actualData.Bytes(), DeepEquals, []byte(data))
|
||||
}
|
||||
|
||||
func (s *MySuite) TestMultipleNewObjects(c *C) {
|
||||
root, err := ioutil.TempDir(os.TempDir(), "donut-")
|
||||
c.Assert(err, IsNil)
|
||||
defer os.RemoveAll(root)
|
||||
donut := NewDonutDriver(root)
|
||||
|
||||
c.Assert(donut.CreateBucket("foo"), IsNil)
|
||||
writer, err := donut.GetObjectWriter("foo", "obj1")
|
||||
c.Assert(err, IsNil)
|
||||
writer.Write([]byte("one"))
|
||||
writer.Close()
|
||||
|
||||
writer, err = donut.GetObjectWriter("foo", "obj2")
|
||||
c.Assert(err, IsNil)
|
||||
writer.Write([]byte("two"))
|
||||
writer.Close()
|
||||
|
||||
// c.Skip("not complete")
|
||||
|
||||
reader, err := donut.GetObject("foo", "obj1")
|
||||
c.Assert(err, IsNil)
|
||||
var readerBuffer1 bytes.Buffer
|
||||
_, err = io.Copy(&readerBuffer1, reader)
|
||||
c.Assert(err, IsNil)
|
||||
// c.Skip("Not Implemented")
|
||||
c.Assert(readerBuffer1.Bytes(), DeepEquals, []byte("one"))
|
||||
|
||||
reader, err = donut.GetObject("foo", "obj2")
|
||||
c.Assert(err, IsNil)
|
||||
var readerBuffer2 bytes.Buffer
|
||||
_, err = io.Copy(&readerBuffer2, reader)
|
||||
c.Assert(err, IsNil)
|
||||
c.Assert(readerBuffer2.Bytes(), DeepEquals, []byte("two"))
|
||||
}
|
||||
39
pkg/storage/donut/objectwriter.go
Normal file
39
pkg/storage/donut/objectwriter.go
Normal file
|
|
@ -0,0 +1,39 @@
|
|||
package donut
|
||||
|
||||
import (
|
||||
"errors"
|
||||
)
|
||||
|
||||
type objectWriter struct {
|
||||
metadata map[string]string
|
||||
}
|
||||
|
||||
func (self objectWriter) Write(data []byte) (length int, err error) {
|
||||
return 11, nil
|
||||
}
|
||||
|
||||
func (self objectWriter) Close() error {
|
||||
return nil
|
||||
}
|
||||
|
||||
func (self objectWriter) CloseWithError(err error) error {
|
||||
return errors.New("Not Implemented")
|
||||
}
|
||||
|
||||
func (self objectWriter) SetMetadata(metadata map[string]string) error {
|
||||
for k := range self.metadata {
|
||||
delete(self.metadata, k)
|
||||
}
|
||||
for k, v := range metadata {
|
||||
self.metadata[k] = v
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
func (self objectWriter) GetMetadata() (map[string]string, error) {
|
||||
ret := make(map[string]string)
|
||||
for k, v := range self.metadata {
|
||||
ret[k] = v
|
||||
}
|
||||
return ret, nil
|
||||
}
|
||||
Loading…
Reference in a new issue