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blobmover.go
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blobmover.go
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// Copyright 2019 The OpenSDS Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package blobmover
import (
"bytes"
"context"
"encoding/base64"
"encoding/binary"
"errors"
"io"
"net/url"
"time"
"github.com/Azure/azure-storage-blob-go/azblob"
"github.com/micro/go-log"
. "github.com/opensds/multi-cloud/datamover/pkg/utils"
pb "github.com/opensds/multi-cloud/datamover/proto"
)
var (
HTTP_OK = 200
HTTP_CREATED = 201
HTTP_ACCEPTED = 202
)
//TryTimeout indicates the maximum time allowed for any single try of an HTTP request. 60 seconds per MB as default.
var MaxTimeForSingleHttpRequest = 16 * time.Minute
type BlobMover struct {
containerURL azblob.ContainerURL
completeParts []string
}
func handleAzureBlobErrors(err error) error {
if err != nil {
if serr, ok := err.(azblob.StorageError); ok { // This error is a Service-specific
code := string(serr.ServiceCode())
switch code { // Compare serviceCode to ServiceCodeXxx constants
case string(azblob.StorageErrorCodeAuthenticationFailed):
log.Log("azure error: permission denied.")
return errors.New(DMERR_NoPermission)
default:
return err
}
}
}
return nil
}
func (mover *BlobMover) Init(endpoint *string, acountName *string, accountKey *string) error {
var err error
mover.containerURL, err = mover.createContainerURL(endpoint, acountName, accountKey)
if err != nil {
log.Logf("[blobmover] init container URL faild:%v\n", err)
return handleAzureBlobErrors(err)
}
log.Log("[blobmover] Init succeed, container URL:", mover.containerURL.String())
return nil
}
func (mover *BlobMover) createContainerURL(endpoint *string, acountName *string, accountKey *string) (azblob.ContainerURL,
error) {
credential, err := azblob.NewSharedKeyCredential(*acountName, *accountKey)
if err != nil {
log.Logf("[blobmover] create credential failed, err:%v\n", err)
return azblob.ContainerURL{}, handleAzureBlobErrors(err)
}
//create containerURL
p := azblob.NewPipeline(credential, azblob.PipelineOptions{
Retry: azblob.RetryOptions{
TryTimeout: MaxTimeForSingleHttpRequest,
},
})
URL, _ := url.Parse(*endpoint)
return azblob.NewContainerURL(*URL, p), nil
}
func (mover *BlobMover) DownloadObj(objKey string, srcLoca *LocationInfo, buf []byte) (size int64, err error) {
err = mover.Init(&srcLoca.EndPoint, &srcLoca.Access, &srcLoca.Security)
if err != nil {
return 0, handleAzureBlobErrors(err)
}
log.Logf("[blobmover] Try to download, bucket:%s,obj:%s\n", srcLoca.BucketName, objKey)
ctx := context.Background()
blobURL := mover.containerURL.NewBlockBlobURL(objKey)
for tries := 1; tries <= 3; tries++ {
downloadResp, err := blobURL.Download(ctx, 0, azblob.CountToEnd, azblob.BlobAccessConditions{},
false)
if err != nil {
log.Logf("[blobmover] download object[%s] failed %d times, err:%v\n", objKey, tries, err)
e := handleAzureBlobErrors(err)
if tries >= 3 || e.Error() == DMERR_NoPermission { //If no permission, then no need to retry.
return 0, e
}
} else {
size = 0
var readErr error
var readCount int = 0
for {
s := buf[size:]
readCount, readErr = downloadResp.Response().Body.Read(s)
if readCount > 0 {
size += int64(readCount)
}
if readErr != nil {
log.Logf("[blobmover] readErr[objkey:%s]=%v\n", objKey, readErr)
break
}
}
if readErr == io.EOF {
readErr = nil
}
log.Logf("[blobmover] Download object[%s] successfully.", objKey)
return size, readErr
}
}
log.Logf("[blobmover] download object[%s], should not be here.", objKey)
return 0, errors.New(DMERR_InternalError)
}
func (mover *BlobMover) UploadObj(objKey string, destLoca *LocationInfo, buf []byte) error {
err := mover.Init(&destLoca.EndPoint, &destLoca.Access, &destLoca.Security)
if err != nil {
return err
}
ctx := context.Background()
blobURL := mover.containerURL.NewBlockBlobURL(objKey)
log.Logf("[blobmover] Try to upload object[%s].", objKey)
for tries := 1; tries <= 3; tries++ {
uploadResp, err := blobURL.Upload(ctx, bytes.NewReader(buf), azblob.BlobHTTPHeaders{}, nil,
azblob.BlobAccessConditions{})
if err != nil {
log.Logf("[blobmover] upload object[%s] failed %d times, err:%v\n", objKey, tries, err)
e := handleAzureBlobErrors(err)
if tries >= 3 || e.Error() == DMERR_NoPermission { //If no permission, then no need to retry.
return e
}
} else if uploadResp.StatusCode() != HTTP_CREATED {
log.Logf("[blobmover] upload object[%s] StatusCode:%d\n", objKey, uploadResp.StatusCode())
if tries == 3 {
return errors.New(DMERR_InternalError)
}
} else {
log.Logf("[blobmover] Upload object[%s] successfully.", objKey)
if destLoca.ClassName != "" {
err := mover.setTier(&objKey, &destLoca.ClassName)
if err != nil {
// TODO:
}
}
return nil
}
}
log.Logf("[blobmover] upload object[%s], should not be here.", objKey)
return errors.New(DMERR_InternalError)
}
func (mover *BlobMover) DeleteObj(objKey string, loca *LocationInfo) error {
err := mover.Init(&loca.EndPoint, &loca.Access, &loca.Security)
if err != nil {
return err
}
ctx := context.Background()
blobURL := mover.containerURL.NewBlockBlobURL(objKey)
log.Logf("[blobmover] Try to delete object[%s].", objKey)
for tries := 1; tries <= 3; tries++ {
delRsp, err := blobURL.Delete(ctx, azblob.DeleteSnapshotsOptionInclude, azblob.BlobAccessConditions{})
if err != nil {
log.Logf("[blobmover] delete object[%s] failed %d times, err:%v\n", objKey, tries, err)
e := handleAzureBlobErrors(err)
if tries >= 3 || e.Error() == DMERR_NoPermission { //If no permission, then no need to retry.
return e
}
} else if delRsp.StatusCode() == HTTP_OK || delRsp.StatusCode() == HTTP_ACCEPTED {
log.Logf("[blobmover] delete object[%s] successfully.", objKey)
return nil
} else {
log.Logf("[blobmover] delete object[%s] StatusCode:%d\n", objKey, delRsp.StatusCode())
if tries >= 3 {
return errors.New(DMERR_InternalError)
}
}
}
log.Logf("[blobmover] delete object[%s], should not be here.", objKey)
return errors.New(DMERR_InternalError)
}
func (mover *BlobMover) MultiPartDownloadInit(srcLoca *LocationInfo) error {
log.Logf("[blobmover] Prepare to do part upload, container:%s.\n", srcLoca.BucketName)
return mover.Init(&srcLoca.EndPoint, &srcLoca.Access, &srcLoca.Security)
}
func (mover *BlobMover) DownloadRange(objKey string, srcLoca *LocationInfo, buf []byte, start int64, end int64) (size int64,
err error) {
log.Logf("[blobmover] Try to download object[%s] range[%d - %d]...\n", objKey, start, end)
ctx := context.Background()
blobURL := mover.containerURL.NewBlobURL(objKey)
count := end - start + 1
for tries := 1; tries <= 3; tries++ {
err = azblob.DownloadBlobToBuffer(ctx, blobURL, start, count, buf, azblob.DownloadFromBlobOptions{})
if err != nil {
log.Logf("[blobomver] donwload object[%s] to buffer failed %d times, err:%v\n", objKey, tries, err)
e := handleAzureBlobErrors(err)
if tries >= 3 || e.Error() == DMERR_NoPermission { //If no permission, then no need to retry.
return 0, e
}
} else {
log.Logf("[blobmover] download object[%s] range[%d - %d] successfully.\n", objKey, start, end)
return count, nil
}
}
log.Logf("[blobmover] download object[%s] range[%d - %d], should not be here.\n", objKey, start, end)
return 0, errors.New(DMERR_InternalError)
}
func (mover *BlobMover) MultiPartUploadInit(objKey string, destLoca *LocationInfo) (string, error) {
log.Logf("[blobmover] Prepare to do part upload for object[%s], container:%s, blob:%s\n",
objKey, destLoca.BucketName, objKey)
return "", mover.Init(&destLoca.EndPoint, &destLoca.Access, &destLoca.Security)
}
func (mover *BlobMover) Int64ToBase64(blockID int64) string {
buf := (&[8]byte{})[:]
binary.LittleEndian.PutUint64(buf, uint64(blockID))
return mover.BinaryToBase64(buf)
}
func (mover *BlobMover) BinaryToBase64(binaryID []byte) string {
return base64.StdEncoding.EncodeToString(binaryID)
}
func (mover *BlobMover) Base64ToInt64(base64ID string) int64 {
bin, _ := base64.StdEncoding.DecodeString(base64ID)
return int64(binary.LittleEndian.Uint64(bin))
}
func (mover *BlobMover) UploadPart(objKey string, destLoca *LocationInfo, upBytes int64, buf []byte, partNumber int64,
offset int64) error {
log.Logf("[blobmover] Try to upload object[%s] range[partnumber#%d,offset#%d]...\n", objKey, partNumber, offset)
//TODO: Consider that "A blob can have up to 100,000 uncommitted blocks, but their total size cannot exceed 200,000 MB."
ctx := context.Background()
blobURL := mover.containerURL.NewBlockBlobURL(objKey)
base64ID := mover.Int64ToBase64(partNumber)
for tries := 1; tries <= 3; tries++ {
_, err := blobURL.StageBlock(ctx, base64ID, bytes.NewReader(buf), azblob.LeaseAccessConditions{}, nil)
if err != nil {
log.Logf("[blobmover] upload object[objkey:%s] part[%d] failed %d times. err:%v\n", objKey, partNumber, tries, err)
e := handleAzureBlobErrors(err)
if tries >= 3 || e.Error() == DMERR_NoPermission { //If no permission, then no need to retry.
return e
}
} else {
log.Logf("[blobmover] Upload range[objkey:%s, partnumber#%d, base64ID#%d] successfully.\n",
objKey, partNumber, base64ID)
mover.completeParts = append(mover.completeParts, base64ID)
return nil
}
}
log.Logf("[blobmover] upload range[objkey:%s, partnumber#%d, base64ID#%d], should not be here.\n",
objKey, partNumber, base64ID)
return errors.New(DMERR_InternalError)
}
func (mover *BlobMover) AbortMultipartUpload(objKey string, destLoca *LocationInfo) error {
log.Logf("No need to abort multipart upload[objkey:%s].\n", objKey)
return nil
}
//A blob can have up to 100,000 uncommitted blocks, but their total size cannot exceed 200,000 MB.
func (mover *BlobMover) CompleteMultipartUpload(objKey string, destLoca *LocationInfo) error {
ctx := context.Background()
blobURL := mover.containerURL.NewBlockBlobURL(objKey)
log.Logf("[blobmover] Try to CompleteMultipartUpload of object[%s].\n", objKey)
for tries := 1; tries <= 3; tries++ {
_, err := blobURL.CommitBlockList(ctx, mover.completeParts, azblob.BlobHTTPHeaders{}, azblob.Metadata{}, azblob.BlobAccessConditions{})
if err != nil {
log.Logf("[blobmover] completeMultipartUpload of object[%s] failed:%v\n", objKey, err)
e := handleAzureBlobErrors(err)
if tries >= 3 || e.Error() == DMERR_NoPermission { //If no permission, then no need to retry.
return e
}
} else {
log.Logf("[blobmover] completeMultipartUpload of object[%s] successfully.\n", objKey)
if destLoca.ClassName != "" {
err := mover.setTier(&objKey, &destLoca.ClassName)
if err != nil {
mover.DeleteObj(objKey, destLoca)
return err
}
}
return nil
}
}
log.Logf("[blobmover] completeMultipartUpload of object[%s], should not be here.\n", objKey)
return errors.New(DMERR_InternalError)
}
func ListObjs(loca *LocationInfo, filt *pb.Filter) ([]azblob.BlobItem, error) {
log.Logf("[blobmover] List objects of container[%s]\n", loca.BucketName)
credential, err := azblob.NewSharedKeyCredential(loca.Access, loca.Security)
if err != nil {
log.Fatalf("[blobmover] create credential failed for list objects, err:%v\n", err)
return nil, handleAzureBlobErrors(err)
}
//create containerURL
p := azblob.NewPipeline(credential, azblob.PipelineOptions{})
URL, _ := url.Parse(loca.EndPoint)
containerURL := azblob.NewContainerURL(*URL, p)
//TODO: Set the best context
ctx := context.Background()
var objs []azblob.BlobItem
option := azblob.ListBlobsSegmentOptions{}
if filt != nil {
option.Prefix = filt.Prefix
}
for marker := (azblob.Marker{}); marker.NotDone(); {
// Get a result segment starting with the blob indicated by the current Marker.
listBlob, err := containerURL.ListBlobsFlatSegment(ctx, marker, option)
if err != nil {
log.Logf("[blobmover] listBlobsFlatSegment failed:%v\n", err)
e := handleAzureBlobErrors(err)
return nil, e
}
objs = append(objs, listBlob.Segment.BlobItems...)
marker = listBlob.NextMarker
}
return objs, nil
}