5dc714b347
Change-Id: Ia100975cb93c0a6d94ea5542b1c9ce386bc87649 Signed-off-by: weiyuan.yl <weiyuan.yl@alibaba-inc.com>
790 lines
21 KiB
Go
790 lines
21 KiB
Go
// Package oss provides a storagedriver.StorageDriver implementation to
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// store blobs in Aliyun OSS cloud storage.
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//
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// This package leverages the denverdino/aliyungo client library for interfacing with
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// oss.
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//
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// Because OSS is a key, value store the Stat call does not support last modification
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// time for directories (directories are an abstraction for key, value stores)
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//
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// +build include_oss
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package oss
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import (
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"bytes"
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"fmt"
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"io"
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"io/ioutil"
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"net/http"
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"reflect"
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"strconv"
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"strings"
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"sync"
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"time"
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"github.com/docker/distribution/context"
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"github.com/Sirupsen/logrus"
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"github.com/denverdino/aliyungo/oss"
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storagedriver "github.com/docker/distribution/registry/storage/driver"
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"github.com/docker/distribution/registry/storage/driver/base"
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"github.com/docker/distribution/registry/storage/driver/factory"
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)
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const driverName = "oss"
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// minChunkSize defines the minimum multipart upload chunk size
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// OSS API requires multipart upload chunks to be at least 5MB
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const minChunkSize = 5 << 20
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const defaultChunkSize = 2 * minChunkSize
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const defaultTimeout = 2 * time.Minute // 2 minute timeout per chunk
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// listMax is the largest amount of objects you can request from OSS in a list call
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const listMax = 1000
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//DriverParameters A struct that encapsulates all of the driver parameters after all values have been set
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type DriverParameters struct {
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AccessKeyID string
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AccessKeySecret string
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Bucket string
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Region oss.Region
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Internal bool
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Encrypt bool
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Secure bool
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ChunkSize int64
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RootDirectory string
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Endpoint string
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}
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func init() {
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factory.Register(driverName, &ossDriverFactory{})
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}
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// ossDriverFactory implements the factory.StorageDriverFactory interface
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type ossDriverFactory struct{}
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func (factory *ossDriverFactory) Create(parameters map[string]interface{}) (storagedriver.StorageDriver, error) {
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return FromParameters(parameters)
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}
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type driver struct {
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Client *oss.Client
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Bucket *oss.Bucket
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ChunkSize int64
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Encrypt bool
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RootDirectory string
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pool sync.Pool // pool []byte buffers used for WriteStream
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zeros []byte // shared, zero-valued buffer used for WriteStream
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}
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type baseEmbed struct {
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base.Base
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}
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// Driver is a storagedriver.StorageDriver implementation backed by Aliyun OSS
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// Objects are stored at absolute keys in the provided bucket.
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type Driver struct {
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baseEmbed
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}
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// FromParameters constructs a new Driver with a given parameters map
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// Required parameters:
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// - accesskey
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// - secretkey
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// - region
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// - bucket
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// - encrypt
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func FromParameters(parameters map[string]interface{}) (*Driver, error) {
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// Providing no values for these is valid in case the user is authenticating
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// with an IAM on an ec2 instance (in which case the instance credentials will
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// be summoned when GetAuth is called)
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accessKey, ok := parameters["accesskeyid"]
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if !ok {
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return nil, fmt.Errorf("No accesskeyid parameter provided")
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}
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secretKey, ok := parameters["accesskeysecret"]
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if !ok {
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return nil, fmt.Errorf("No accesskeysecret parameter provided")
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}
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regionName, ok := parameters["region"]
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if !ok || fmt.Sprint(regionName) == "" {
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return nil, fmt.Errorf("No region parameter provided")
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}
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bucket, ok := parameters["bucket"]
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if !ok || fmt.Sprint(bucket) == "" {
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return nil, fmt.Errorf("No bucket parameter provided")
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}
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internalBool := false
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internal, ok := parameters["internal"]
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if ok {
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internalBool, ok = internal.(bool)
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if !ok {
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return nil, fmt.Errorf("The internal parameter should be a boolean")
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}
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}
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encryptBool := false
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encrypt, ok := parameters["encrypt"]
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if ok {
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encryptBool, ok = encrypt.(bool)
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if !ok {
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return nil, fmt.Errorf("The encrypt parameter should be a boolean")
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}
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}
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secureBool := true
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secure, ok := parameters["secure"]
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if ok {
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secureBool, ok = secure.(bool)
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if !ok {
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return nil, fmt.Errorf("The secure parameter should be a boolean")
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}
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}
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chunkSize := int64(defaultChunkSize)
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chunkSizeParam, ok := parameters["chunksize"]
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if ok {
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switch v := chunkSizeParam.(type) {
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case string:
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vv, err := strconv.ParseInt(v, 0, 64)
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if err != nil {
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return nil, fmt.Errorf("chunksize parameter must be an integer, %v invalid", chunkSizeParam)
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}
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chunkSize = vv
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case int64:
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chunkSize = v
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case int, uint, int32, uint32, uint64:
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chunkSize = reflect.ValueOf(v).Convert(reflect.TypeOf(chunkSize)).Int()
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default:
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return nil, fmt.Errorf("invalid valud for chunksize: %#v", chunkSizeParam)
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}
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if chunkSize < minChunkSize {
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return nil, fmt.Errorf("The chunksize %#v parameter should be a number that is larger than or equal to %d", chunkSize, minChunkSize)
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}
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}
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rootDirectory, ok := parameters["rootdirectory"]
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if !ok {
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rootDirectory = ""
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}
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endpoint, ok := parameters["endpoint"]
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if !ok {
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endpoint = ""
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}
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params := DriverParameters{
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AccessKeyID: fmt.Sprint(accessKey),
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AccessKeySecret: fmt.Sprint(secretKey),
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Bucket: fmt.Sprint(bucket),
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Region: oss.Region(fmt.Sprint(regionName)),
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ChunkSize: chunkSize,
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RootDirectory: fmt.Sprint(rootDirectory),
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Encrypt: encryptBool,
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Secure: secureBool,
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Internal: internalBool,
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Endpoint: fmt.Sprint(endpoint),
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}
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return New(params)
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}
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// New constructs a new Driver with the given Aliyun credentials, region, encryption flag, and
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// bucketName
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func New(params DriverParameters) (*Driver, error) {
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client := oss.NewOSSClient(params.Region, params.Internal, params.AccessKeyID, params.AccessKeySecret, params.Secure)
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client.SetEndpoint(params.Endpoint)
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bucket := client.Bucket(params.Bucket)
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client.SetDebug(false)
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// Validate that the given credentials have at least read permissions in the
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// given bucket scope.
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if _, err := bucket.List(strings.TrimRight(params.RootDirectory, "/"), "", "", 1); err != nil {
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return nil, err
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}
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// TODO(tg123): Currently multipart uploads have no timestamps, so this would be unwise
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// if you initiated a new OSS client while another one is running on the same bucket.
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d := &driver{
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Client: client,
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Bucket: bucket,
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ChunkSize: params.ChunkSize,
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Encrypt: params.Encrypt,
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RootDirectory: params.RootDirectory,
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zeros: make([]byte, params.ChunkSize),
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}
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d.pool.New = func() interface{} {
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return make([]byte, d.ChunkSize)
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}
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return &Driver{
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baseEmbed: baseEmbed{
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Base: base.Base{
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StorageDriver: d,
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},
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},
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}, nil
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}
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// Implement the storagedriver.StorageDriver interface
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func (d *driver) Name() string {
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return driverName
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}
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// GetContent retrieves the content stored at "path" as a []byte.
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func (d *driver) GetContent(ctx context.Context, path string) ([]byte, error) {
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content, err := d.Bucket.Get(d.ossPath(path))
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if err != nil {
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return nil, parseError(path, err)
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}
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return content, nil
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}
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// PutContent stores the []byte content at a location designated by "path".
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func (d *driver) PutContent(ctx context.Context, path string, contents []byte) error {
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return parseError(path, d.Bucket.Put(d.ossPath(path), contents, d.getContentType(), getPermissions(), d.getOptions()))
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}
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// ReadStream retrieves an io.ReadCloser for the content stored at "path" with a
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// given byte offset.
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func (d *driver) ReadStream(ctx context.Context, path string, offset int64) (io.ReadCloser, error) {
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headers := make(http.Header)
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headers.Add("Range", "bytes="+strconv.FormatInt(offset, 10)+"-")
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resp, err := d.Bucket.GetResponseWithHeaders(d.ossPath(path), headers)
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if err != nil {
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return nil, parseError(path, err)
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}
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// Due to Aliyun OSS API, status 200 and whole object will be return instead of an
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// InvalidRange error when range is invalid.
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//
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// OSS sever will always return http.StatusPartialContent if range is acceptable.
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if resp.StatusCode != http.StatusPartialContent {
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resp.Body.Close()
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return ioutil.NopCloser(bytes.NewReader(nil)), nil
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}
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return resp.Body, nil
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}
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// WriteStream stores the contents of the provided io.Reader at a
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// location designated by the given path. The driver will know it has
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// received the full contents when the reader returns io.EOF. The number
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// of successfully READ bytes will be returned, even if an error is
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// returned. May be used to resume writing a stream by providing a nonzero
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// offset. Offsets past the current size will write from the position
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// beyond the end of the file.
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func (d *driver) WriteStream(ctx context.Context, path string, offset int64, reader io.Reader) (totalRead int64, err error) {
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partNumber := 1
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bytesRead := 0
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var putErrChan chan error
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parts := []oss.Part{}
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var part oss.Part
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done := make(chan struct{}) // stopgap to free up waiting goroutines
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multi, err := d.Bucket.InitMulti(d.ossPath(path), d.getContentType(), getPermissions(), d.getOptions())
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if err != nil {
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return 0, err
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}
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buf := d.getbuf()
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// We never want to leave a dangling multipart upload, our only consistent state is
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// when there is a whole object at path. This is in order to remain consistent with
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// the stat call.
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//
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// Note that if the machine dies before executing the defer, we will be left with a dangling
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// multipart upload, which will eventually be cleaned up, but we will lose all of the progress
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// made prior to the machine crashing.
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defer func() {
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if putErrChan != nil {
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if putErr := <-putErrChan; putErr != nil {
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err = putErr
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}
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}
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if len(parts) > 0 {
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if multi == nil {
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// Parts should be empty if the multi is not initialized
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panic("Unreachable")
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} else {
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if multi.Complete(parts) != nil {
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multi.Abort()
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}
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}
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}
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d.putbuf(buf) // needs to be here to pick up new buf value
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close(done) // free up any waiting goroutines
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}()
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// Fills from 0 to total from current
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fromSmallCurrent := func(total int64) error {
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current, err := d.ReadStream(ctx, path, 0)
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if err != nil {
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return err
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}
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bytesRead = 0
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for int64(bytesRead) < total {
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//The loop should very rarely enter a second iteration
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nn, err := current.Read(buf[bytesRead:total])
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bytesRead += nn
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if err != nil {
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if err != io.EOF {
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return err
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}
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break
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}
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}
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return nil
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}
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// Fills from parameter to chunkSize from reader
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fromReader := func(from int64) error {
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bytesRead = 0
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for from+int64(bytesRead) < d.ChunkSize {
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nn, err := reader.Read(buf[from+int64(bytesRead):])
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totalRead += int64(nn)
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bytesRead += nn
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if err != nil {
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if err != io.EOF {
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return err
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}
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break
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}
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}
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if putErrChan == nil {
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putErrChan = make(chan error)
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} else {
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if putErr := <-putErrChan; putErr != nil {
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putErrChan = nil
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return putErr
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}
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}
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go func(bytesRead int, from int64, buf []byte) {
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defer d.putbuf(buf) // this buffer gets dropped after this call
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// DRAGONS(stevvooe): There are few things one might want to know
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// about this section. First, the putErrChan is expecting an error
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// and a nil or just a nil to come through the channel. This is
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// covered by the silly defer below. The other aspect is the OSS
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// retry backoff to deal with RequestTimeout errors. Even though
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// the underlying OSS library should handle it, it doesn't seem to
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// be part of the shouldRetry function (see denverdino/aliyungo/oss).
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defer func() {
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select {
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case putErrChan <- nil: // for some reason, we do this no matter what.
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case <-done:
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return // ensure we don't leak the goroutine
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}
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}()
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if bytesRead <= 0 {
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return
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}
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var err error
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var part oss.Part
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part, err = multi.PutPartWithTimeout(int(partNumber), bytes.NewReader(buf[0:int64(bytesRead)+from]), defaultTimeout)
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if err != nil {
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logrus.Errorf("error putting part, aborting: %v", err)
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select {
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case putErrChan <- err:
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case <-done:
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return // don't leak the goroutine
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}
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}
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// parts and partNumber are safe, because this function is the
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// only one modifying them and we force it to be executed
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// serially.
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parts = append(parts, part)
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partNumber++
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}(bytesRead, from, buf)
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buf = d.getbuf() // use a new buffer for the next call
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return nil
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}
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if offset > 0 {
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resp, err := d.Bucket.Head(d.ossPath(path), nil)
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if err != nil {
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if ossErr, ok := err.(*oss.Error); !ok || ossErr.StatusCode != http.StatusNotFound {
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return 0, err
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}
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}
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currentLength := int64(0)
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if err == nil {
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currentLength = resp.ContentLength
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}
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if currentLength >= offset {
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if offset < d.ChunkSize {
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// chunkSize > currentLength >= offset
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if err = fromSmallCurrent(offset); err != nil {
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return totalRead, err
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}
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if err = fromReader(offset); err != nil {
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return totalRead, err
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}
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if totalRead+offset < d.ChunkSize {
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return totalRead, nil
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}
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} else {
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// currentLength >= offset >= chunkSize
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_, part, err = multi.PutPartCopy(partNumber,
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oss.CopyOptions{CopySourceOptions: "bytes=0-" + strconv.FormatInt(offset-1, 10)},
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d.Bucket.Path(d.ossPath(path)))
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if err != nil {
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return 0, err
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}
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parts = append(parts, part)
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partNumber++
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}
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} else {
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// Fills between parameters with 0s but only when to - from <= chunkSize
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fromZeroFillSmall := func(from, to int64) error {
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bytesRead = 0
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for from+int64(bytesRead) < to {
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nn, err := bytes.NewReader(d.zeros).Read(buf[from+int64(bytesRead) : to])
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bytesRead += nn
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if err != nil {
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return err
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}
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}
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return nil
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}
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// Fills between parameters with 0s, making new parts
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fromZeroFillLarge := func(from, to int64) error {
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bytesRead64 := int64(0)
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for to-(from+bytesRead64) >= d.ChunkSize {
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part, err := multi.PutPartWithTimeout(int(partNumber), bytes.NewReader(d.zeros), defaultTimeout)
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if err != nil {
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return err
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}
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bytesRead64 += d.ChunkSize
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parts = append(parts, part)
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partNumber++
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}
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return fromZeroFillSmall(0, (to-from)%d.ChunkSize)
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}
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// currentLength < offset
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if currentLength < d.ChunkSize {
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if offset < d.ChunkSize {
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// chunkSize > offset > currentLength
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if err = fromSmallCurrent(currentLength); err != nil {
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return totalRead, err
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}
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if err = fromZeroFillSmall(currentLength, offset); err != nil {
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return totalRead, err
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}
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if err = fromReader(offset); err != nil {
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return totalRead, err
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}
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if totalRead+offset < d.ChunkSize {
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return totalRead, nil
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}
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} else {
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// offset >= chunkSize > currentLength
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if err = fromSmallCurrent(currentLength); err != nil {
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return totalRead, err
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}
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if err = fromZeroFillSmall(currentLength, d.ChunkSize); err != nil {
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return totalRead, err
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}
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part, err = multi.PutPartWithTimeout(int(partNumber), bytes.NewReader(buf), defaultTimeout)
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if err != nil {
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return totalRead, err
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}
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parts = append(parts, part)
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partNumber++
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//Zero fill from chunkSize up to offset, then some reader
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if err = fromZeroFillLarge(d.ChunkSize, offset); err != nil {
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return totalRead, err
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}
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if err = fromReader(offset % d.ChunkSize); err != nil {
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return totalRead, err
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}
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if totalRead+(offset%d.ChunkSize) < d.ChunkSize {
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return totalRead, nil
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}
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}
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} else {
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// offset > currentLength >= chunkSize
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_, part, err = multi.PutPartCopy(partNumber,
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oss.CopyOptions{},
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d.Bucket.Path(d.ossPath(path)))
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if err != nil {
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return 0, err
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}
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parts = append(parts, part)
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partNumber++
|
|
|
|
//Zero fill from currentLength up to offset, then some reader
|
|
if err = fromZeroFillLarge(currentLength, offset); err != nil {
|
|
return totalRead, err
|
|
}
|
|
|
|
if err = fromReader((offset - currentLength) % d.ChunkSize); err != nil {
|
|
return totalRead, err
|
|
}
|
|
|
|
if totalRead+((offset-currentLength)%d.ChunkSize) < d.ChunkSize {
|
|
return totalRead, nil
|
|
}
|
|
}
|
|
|
|
}
|
|
}
|
|
|
|
for {
|
|
if err = fromReader(0); err != nil {
|
|
return totalRead, err
|
|
}
|
|
|
|
if int64(bytesRead) < d.ChunkSize {
|
|
break
|
|
}
|
|
}
|
|
|
|
return totalRead, nil
|
|
}
|
|
|
|
// Stat retrieves the FileInfo for the given path, including the current size
|
|
// in bytes and the creation time.
|
|
func (d *driver) Stat(ctx context.Context, path string) (storagedriver.FileInfo, error) {
|
|
listResponse, err := d.Bucket.List(d.ossPath(path), "", "", 1)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
fi := storagedriver.FileInfoFields{
|
|
Path: path,
|
|
}
|
|
|
|
if len(listResponse.Contents) == 1 {
|
|
if listResponse.Contents[0].Key != d.ossPath(path) {
|
|
fi.IsDir = true
|
|
} else {
|
|
fi.IsDir = false
|
|
fi.Size = listResponse.Contents[0].Size
|
|
|
|
timestamp, err := time.Parse(time.RFC3339Nano, listResponse.Contents[0].LastModified)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
fi.ModTime = timestamp
|
|
}
|
|
} else if len(listResponse.CommonPrefixes) == 1 {
|
|
fi.IsDir = true
|
|
} else {
|
|
return nil, storagedriver.PathNotFoundError{Path: path}
|
|
}
|
|
|
|
return storagedriver.FileInfoInternal{FileInfoFields: fi}, nil
|
|
}
|
|
|
|
// List returns a list of the objects that are direct descendants of the given path.
|
|
func (d *driver) List(ctx context.Context, opath string) ([]string, error) {
|
|
path := opath
|
|
if path != "/" && opath[len(path)-1] != '/' {
|
|
path = path + "/"
|
|
}
|
|
|
|
// This is to cover for the cases when the rootDirectory of the driver is either "" or "/".
|
|
// In those cases, there is no root prefix to replace and we must actually add a "/" to all
|
|
// results in order to keep them as valid paths as recognized by storagedriver.PathRegexp
|
|
prefix := ""
|
|
if d.ossPath("") == "" {
|
|
prefix = "/"
|
|
}
|
|
|
|
listResponse, err := d.Bucket.List(d.ossPath(path), "/", "", listMax)
|
|
if err != nil {
|
|
return nil, parseError(opath, err)
|
|
}
|
|
|
|
files := []string{}
|
|
directories := []string{}
|
|
|
|
for {
|
|
for _, key := range listResponse.Contents {
|
|
files = append(files, strings.Replace(key.Key, d.ossPath(""), prefix, 1))
|
|
}
|
|
|
|
for _, commonPrefix := range listResponse.CommonPrefixes {
|
|
directories = append(directories, strings.Replace(commonPrefix[0:len(commonPrefix)-1], d.ossPath(""), prefix, 1))
|
|
}
|
|
|
|
if listResponse.IsTruncated {
|
|
listResponse, err = d.Bucket.List(d.ossPath(path), "/", listResponse.NextMarker, listMax)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
} else {
|
|
break
|
|
}
|
|
}
|
|
|
|
if opath != "/" {
|
|
if len(files) == 0 && len(directories) == 0 {
|
|
// Treat empty response as missing directory, since we don't actually
|
|
// have directories in s3.
|
|
return nil, storagedriver.PathNotFoundError{Path: opath}
|
|
}
|
|
}
|
|
|
|
return append(files, directories...), nil
|
|
}
|
|
|
|
// Move moves an object stored at sourcePath to destPath, removing the original
|
|
// object.
|
|
func (d *driver) Move(ctx context.Context, sourcePath string, destPath string) error {
|
|
logrus.Infof("Move from %s to %s", d.ossPath(sourcePath), d.ossPath(destPath))
|
|
|
|
err := d.Bucket.CopyLargeFile(d.ossPath(sourcePath), d.ossPath(destPath),
|
|
d.getContentType(),
|
|
getPermissions(),
|
|
oss.Options{})
|
|
if err != nil {
|
|
logrus.Errorf("Failed for move from %s to %s: %v", d.ossPath(sourcePath), d.ossPath(destPath), err)
|
|
return parseError(sourcePath, err)
|
|
}
|
|
|
|
return d.Delete(ctx, sourcePath)
|
|
}
|
|
|
|
// Delete recursively deletes all objects stored at "path" and its subpaths.
|
|
func (d *driver) Delete(ctx context.Context, path string) error {
|
|
listResponse, err := d.Bucket.List(d.ossPath(path), "", "", listMax)
|
|
if err != nil || len(listResponse.Contents) == 0 {
|
|
return storagedriver.PathNotFoundError{Path: path}
|
|
}
|
|
|
|
ossObjects := make([]oss.Object, listMax)
|
|
|
|
for len(listResponse.Contents) > 0 {
|
|
for index, key := range listResponse.Contents {
|
|
ossObjects[index].Key = key.Key
|
|
}
|
|
|
|
err := d.Bucket.DelMulti(oss.Delete{Quiet: false, Objects: ossObjects[0:len(listResponse.Contents)]})
|
|
if err != nil {
|
|
return nil
|
|
}
|
|
|
|
listResponse, err = d.Bucket.List(d.ossPath(path), "", "", listMax)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// URLFor returns a URL which may be used to retrieve the content stored at the given path.
|
|
// May return an UnsupportedMethodErr in certain StorageDriver implementations.
|
|
func (d *driver) URLFor(ctx context.Context, path string, options map[string]interface{}) (string, error) {
|
|
methodString := "GET"
|
|
method, ok := options["method"]
|
|
if ok {
|
|
methodString, ok = method.(string)
|
|
if !ok || (methodString != "GET") {
|
|
return "", storagedriver.ErrUnsupportedMethod{}
|
|
}
|
|
}
|
|
|
|
expiresTime := time.Now().Add(20 * time.Minute)
|
|
|
|
expires, ok := options["expiry"]
|
|
if ok {
|
|
et, ok := expires.(time.Time)
|
|
if ok {
|
|
expiresTime = et
|
|
}
|
|
}
|
|
logrus.Infof("methodString: %s, expiresTime: %v", methodString, expiresTime)
|
|
testURL := d.Bucket.SignedURLWithMethod(methodString, d.ossPath(path), expiresTime, nil, nil)
|
|
logrus.Infof("testURL: %s", testURL)
|
|
return testURL, nil
|
|
}
|
|
|
|
func (d *driver) ossPath(path string) string {
|
|
return strings.TrimLeft(strings.TrimRight(d.RootDirectory, "/")+path, "/")
|
|
}
|
|
|
|
func parseError(path string, err error) error {
|
|
if ossErr, ok := err.(*oss.Error); ok && ossErr.StatusCode == http.StatusNotFound && (ossErr.Code == "NoSuchKey" || ossErr.Code == "") {
|
|
return storagedriver.PathNotFoundError{Path: path}
|
|
}
|
|
|
|
return err
|
|
}
|
|
|
|
func hasCode(err error, code string) bool {
|
|
ossErr, ok := err.(*oss.Error)
|
|
return ok && ossErr.Code == code
|
|
}
|
|
|
|
func (d *driver) getOptions() oss.Options {
|
|
return oss.Options{ServerSideEncryption: d.Encrypt}
|
|
}
|
|
|
|
func getPermissions() oss.ACL {
|
|
return oss.Private
|
|
}
|
|
|
|
func (d *driver) getContentType() string {
|
|
return "application/octet-stream"
|
|
}
|
|
|
|
// getbuf returns a buffer from the driver's pool with length d.ChunkSize.
|
|
func (d *driver) getbuf() []byte {
|
|
return d.pool.Get().([]byte)
|
|
}
|
|
|
|
func (d *driver) putbuf(p []byte) {
|
|
copy(p, d.zeros)
|
|
d.pool.Put(p)
|
|
}
|