mirror of
https://github.com/genuinetools/reg.git
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695 lines
19 KiB
Go
695 lines
19 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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"context"
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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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"time"
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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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"github.com/sirupsen/logrus"
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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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}
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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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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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}
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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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// Reader 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) Reader(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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// Writer returns a FileWriter which will store the content written to it
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// at the location designated by "path" after the call to Commit.
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func (d *driver) Writer(ctx context.Context, path string, append bool) (storagedriver.FileWriter, error) {
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key := d.ossPath(path)
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if !append {
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// TODO (brianbland): cancel other uploads at this path
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multi, err := d.Bucket.InitMulti(key, d.getContentType(), getPermissions(), d.getOptions())
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if err != nil {
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return nil, err
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}
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return d.newWriter(key, multi, nil), nil
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}
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multis, _, err := d.Bucket.ListMulti(key, "")
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if err != nil {
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return nil, parseError(path, err)
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}
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for _, multi := range multis {
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if key != multi.Key {
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continue
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}
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parts, err := multi.ListParts()
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if err != nil {
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return nil, parseError(path, err)
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}
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var multiSize int64
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for _, part := range parts {
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multiSize += part.Size
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}
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return d.newWriter(key, multi, parts), nil
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}
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return nil, storagedriver.PathNotFoundError{Path: path}
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}
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// Stat retrieves the FileInfo for the given path, including the current size
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// in bytes and the creation time.
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func (d *driver) Stat(ctx context.Context, path string) (storagedriver.FileInfo, error) {
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listResponse, err := d.Bucket.List(d.ossPath(path), "", "", 1)
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if err != nil {
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return nil, err
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}
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fi := storagedriver.FileInfoFields{
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Path: path,
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}
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if len(listResponse.Contents) == 1 {
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if listResponse.Contents[0].Key != d.ossPath(path) {
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fi.IsDir = true
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} else {
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fi.IsDir = false
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fi.Size = listResponse.Contents[0].Size
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timestamp, err := time.Parse(time.RFC3339Nano, listResponse.Contents[0].LastModified)
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if err != nil {
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return nil, err
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}
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fi.ModTime = timestamp
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}
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} else if len(listResponse.CommonPrefixes) == 1 {
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fi.IsDir = true
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} else {
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return nil, storagedriver.PathNotFoundError{Path: path}
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}
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return storagedriver.FileInfoInternal{FileInfoFields: fi}, nil
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}
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// List returns a list of the objects that are direct descendants of the given path.
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func (d *driver) List(ctx context.Context, opath string) ([]string, error) {
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path := opath
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if path != "/" && opath[len(path)-1] != '/' {
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path = path + "/"
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}
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// This is to cover for the cases when the rootDirectory of the driver is either "" or "/".
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// In those cases, there is no root prefix to replace and we must actually add a "/" to all
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// results in order to keep them as valid paths as recognized by storagedriver.PathRegexp
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prefix := ""
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if d.ossPath("") == "" {
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prefix = "/"
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}
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ossPath := d.ossPath(path)
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listResponse, err := d.Bucket.List(ossPath, "/", "", listMax)
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if err != nil {
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return nil, parseError(opath, err)
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}
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files := []string{}
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directories := []string{}
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for {
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for _, key := range listResponse.Contents {
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files = append(files, strings.Replace(key.Key, d.ossPath(""), prefix, 1))
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}
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for _, commonPrefix := range listResponse.CommonPrefixes {
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directories = append(directories, strings.Replace(commonPrefix[0:len(commonPrefix)-1], d.ossPath(""), prefix, 1))
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}
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if listResponse.IsTruncated {
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listResponse, err = d.Bucket.List(ossPath, "/", listResponse.NextMarker, listMax)
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if err != nil {
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return nil, err
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}
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} else {
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break
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}
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}
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// This is to cover for the cases when the first key equal to ossPath.
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if len(files) > 0 && files[0] == strings.Replace(ossPath, d.ossPath(""), prefix, 1) {
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files = files[1:]
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}
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if opath != "/" {
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if len(files) == 0 && len(directories) == 0 {
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// Treat empty response as missing directory, since we don't actually
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// have directories in s3.
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return nil, storagedriver.PathNotFoundError{Path: opath}
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}
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}
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return append(files, directories...), nil
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}
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const maxConcurrency = 10
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// Move moves an object stored at sourcePath to destPath, removing the original
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// object.
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func (d *driver) Move(ctx context.Context, sourcePath string, destPath string) error {
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logrus.Infof("Move from %s to %s", d.ossPath(sourcePath), d.ossPath(destPath))
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err := d.Bucket.CopyLargeFileInParallel(d.ossPath(sourcePath), d.ossPath(destPath),
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d.getContentType(),
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getPermissions(),
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oss.Options{},
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maxConcurrency)
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if err != nil {
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logrus.Errorf("Failed for move from %s to %s: %v", d.ossPath(sourcePath), d.ossPath(destPath), err)
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return parseError(sourcePath, err)
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}
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return d.Delete(ctx, sourcePath)
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}
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// Delete recursively deletes all objects stored at "path" and its subpaths.
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func (d *driver) Delete(ctx context.Context, path string) error {
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ossPath := d.ossPath(path)
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listResponse, err := d.Bucket.List(ossPath, "", "", listMax)
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if err != nil || len(listResponse.Contents) == 0 {
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return storagedriver.PathNotFoundError{Path: path}
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}
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ossObjects := make([]oss.Object, listMax)
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for len(listResponse.Contents) > 0 {
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numOssObjects := len(listResponse.Contents)
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for index, key := range listResponse.Contents {
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// Stop if we encounter a key that is not a subpath (so that deleting "/a" does not delete "/ab").
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if len(key.Key) > len(ossPath) && (key.Key)[len(ossPath)] != '/' {
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numOssObjects = index
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break
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}
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ossObjects[index].Key = key.Key
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}
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err := d.Bucket.DelMulti(oss.Delete{Quiet: false, Objects: ossObjects[0:numOssObjects]})
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if err != nil {
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return nil
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}
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if numOssObjects < len(listResponse.Contents) {
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return nil
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}
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listResponse, err = d.Bucket.List(d.ossPath(path), "", "", listMax)
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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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// URLFor returns a URL which may be used to retrieve the content stored at the given path.
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// May return an UnsupportedMethodErr in certain StorageDriver implementations.
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func (d *driver) URLFor(ctx context.Context, path string, options map[string]interface{}) (string, error) {
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methodString := "GET"
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method, ok := options["method"]
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if ok {
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methodString, ok = method.(string)
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if !ok || (methodString != "GET") {
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return "", storagedriver.ErrUnsupportedMethod{}
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}
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}
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expiresTime := time.Now().Add(20 * time.Minute)
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expires, ok := options["expiry"]
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if ok {
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et, ok := expires.(time.Time)
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if ok {
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expiresTime = et
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}
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}
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logrus.Infof("methodString: %s, expiresTime: %v", methodString, expiresTime)
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signedURL := d.Bucket.SignedURLWithMethod(methodString, d.ossPath(path), expiresTime, nil, nil)
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logrus.Infof("signed URL: %s", signedURL)
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return signedURL, nil
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}
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// Walk traverses a filesystem defined within driver, starting
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// from the given path, calling f on each file
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func (d *driver) Walk(ctx context.Context, path string, f storagedriver.WalkFn) error {
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return storagedriver.WalkFallback(ctx, d, path, f)
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}
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func (d *driver) ossPath(path string) string {
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return strings.TrimLeft(strings.TrimRight(d.RootDirectory, "/")+path, "/")
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}
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func parseError(path string, err error) error {
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if ossErr, ok := err.(*oss.Error); ok && ossErr.StatusCode == http.StatusNotFound && (ossErr.Code == "NoSuchKey" || ossErr.Code == "") {
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return storagedriver.PathNotFoundError{Path: path}
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}
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return err
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}
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func hasCode(err error, code string) bool {
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ossErr, ok := err.(*oss.Error)
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return ok && ossErr.Code == code
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}
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func (d *driver) getOptions() oss.Options {
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return oss.Options{ServerSideEncryption: d.Encrypt}
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}
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func getPermissions() oss.ACL {
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return oss.Private
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}
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func (d *driver) getContentType() string {
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return "application/octet-stream"
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}
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// writer attempts to upload parts to S3 in a buffered fashion where the last
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// part is at least as large as the chunksize, so the multipart upload could be
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// cleanly resumed in the future. This is violated if Close is called after less
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// than a full chunk is written.
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type writer struct {
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driver *driver
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key string
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multi *oss.Multi
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parts []oss.Part
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size int64
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readyPart []byte
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pendingPart []byte
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closed bool
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committed bool
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cancelled bool
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}
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func (d *driver) newWriter(key string, multi *oss.Multi, parts []oss.Part) storagedriver.FileWriter {
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var size int64
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for _, part := range parts {
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size += part.Size
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}
|
|
return &writer{
|
|
driver: d,
|
|
key: key,
|
|
multi: multi,
|
|
parts: parts,
|
|
size: size,
|
|
}
|
|
}
|
|
|
|
func (w *writer) Write(p []byte) (int, error) {
|
|
if w.closed {
|
|
return 0, fmt.Errorf("already closed")
|
|
} else if w.committed {
|
|
return 0, fmt.Errorf("already committed")
|
|
} else if w.cancelled {
|
|
return 0, fmt.Errorf("already cancelled")
|
|
}
|
|
|
|
// If the last written part is smaller than minChunkSize, we need to make a
|
|
// new multipart upload :sadface:
|
|
if len(w.parts) > 0 && int(w.parts[len(w.parts)-1].Size) < minChunkSize {
|
|
err := w.multi.Complete(w.parts)
|
|
if err != nil {
|
|
w.multi.Abort()
|
|
return 0, err
|
|
}
|
|
|
|
multi, err := w.driver.Bucket.InitMulti(w.key, w.driver.getContentType(), getPermissions(), w.driver.getOptions())
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
w.multi = multi
|
|
|
|
// If the entire written file is smaller than minChunkSize, we need to make
|
|
// a new part from scratch :double sad face:
|
|
if w.size < minChunkSize {
|
|
contents, err := w.driver.Bucket.Get(w.key)
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
w.parts = nil
|
|
w.readyPart = contents
|
|
} else {
|
|
// Otherwise we can use the old file as the new first part
|
|
_, part, err := multi.PutPartCopy(1, oss.CopyOptions{}, w.driver.Bucket.Name+"/"+w.key)
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
w.parts = []oss.Part{part}
|
|
}
|
|
}
|
|
|
|
var n int
|
|
|
|
for len(p) > 0 {
|
|
// If no parts are ready to write, fill up the first part
|
|
if neededBytes := int(w.driver.ChunkSize) - len(w.readyPart); neededBytes > 0 {
|
|
if len(p) >= neededBytes {
|
|
w.readyPart = append(w.readyPart, p[:neededBytes]...)
|
|
n += neededBytes
|
|
p = p[neededBytes:]
|
|
} else {
|
|
w.readyPart = append(w.readyPart, p...)
|
|
n += len(p)
|
|
p = nil
|
|
}
|
|
}
|
|
|
|
if neededBytes := int(w.driver.ChunkSize) - len(w.pendingPart); neededBytes > 0 {
|
|
if len(p) >= neededBytes {
|
|
w.pendingPart = append(w.pendingPart, p[:neededBytes]...)
|
|
n += neededBytes
|
|
p = p[neededBytes:]
|
|
err := w.flushPart()
|
|
if err != nil {
|
|
w.size += int64(n)
|
|
return n, err
|
|
}
|
|
} else {
|
|
w.pendingPart = append(w.pendingPart, p...)
|
|
n += len(p)
|
|
p = nil
|
|
}
|
|
}
|
|
}
|
|
w.size += int64(n)
|
|
return n, nil
|
|
}
|
|
|
|
func (w *writer) Size() int64 {
|
|
return w.size
|
|
}
|
|
|
|
func (w *writer) Close() error {
|
|
if w.closed {
|
|
return fmt.Errorf("already closed")
|
|
}
|
|
w.closed = true
|
|
return w.flushPart()
|
|
}
|
|
|
|
func (w *writer) Cancel() error {
|
|
if w.closed {
|
|
return fmt.Errorf("already closed")
|
|
} else if w.committed {
|
|
return fmt.Errorf("already committed")
|
|
}
|
|
w.cancelled = true
|
|
err := w.multi.Abort()
|
|
return err
|
|
}
|
|
|
|
func (w *writer) Commit() error {
|
|
if w.closed {
|
|
return fmt.Errorf("already closed")
|
|
} else if w.committed {
|
|
return fmt.Errorf("already committed")
|
|
} else if w.cancelled {
|
|
return fmt.Errorf("already cancelled")
|
|
}
|
|
err := w.flushPart()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
w.committed = true
|
|
err = w.multi.Complete(w.parts)
|
|
if err != nil {
|
|
w.multi.Abort()
|
|
return err
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// flushPart flushes buffers to write a part to S3.
|
|
// Only called by Write (with both buffers full) and Close/Commit (always)
|
|
func (w *writer) flushPart() error {
|
|
if len(w.readyPart) == 0 && len(w.pendingPart) == 0 {
|
|
// nothing to write
|
|
return nil
|
|
}
|
|
if len(w.pendingPart) < int(w.driver.ChunkSize) {
|
|
// closing with a small pending part
|
|
// combine ready and pending to avoid writing a small part
|
|
w.readyPart = append(w.readyPart, w.pendingPart...)
|
|
w.pendingPart = nil
|
|
}
|
|
|
|
part, err := w.multi.PutPart(len(w.parts)+1, bytes.NewReader(w.readyPart))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
w.parts = append(w.parts, part)
|
|
w.readyPart = w.pendingPart
|
|
w.pendingPart = nil
|
|
return nil
|
|
}
|