-
Notifications
You must be signed in to change notification settings - Fork 27
/
s3.go
247 lines (210 loc) · 6.7 KB
/
s3.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
/*
* knoxite
* Copyright (c) 2016-2020, Christian Muehlhaeuser <muesli@gmail.com>
* Copyright (c) 2016, Stefan Luecke <glaxx@glaxx.net>
*
* For license see LICENSE
*/
package s3
import (
"bytes"
"errors"
"io/ioutil"
"net/url"
"os"
"strconv"
"strings"
"github.com/minio/minio-go"
"github.com/knoxite/knoxite"
)
// S3Storage stores data on a remote AmazonS3.
type S3Storage struct {
url url.URL
chunkBucket string
snapshotBucket string
repositoryBucket string
region string
client *minio.Client
}
func init() {
knoxite.RegisterStorageBackend(&S3Storage{})
}
// NewBackend returns a S3Storage backend.
func (*S3Storage) NewBackend(URL url.URL) (knoxite.Backend, error) {
var ssl bool
switch URL.Scheme {
case "s3":
ssl = false
case "s3s":
ssl = true
default:
return &S3Storage{}, errors.New("invalid s3 url scheme")
}
var username, pw string
if URL.User != nil {
username = URL.User.Username()
pw, _ = URL.User.Password()
}
if len(username) == 0 {
username = os.Getenv("AWS_ACCESS_KEY_ID")
if len(username) == 0 {
return &S3Storage{}, knoxite.ErrInvalidUsername
}
}
if len(pw) == 0 {
pw = os.Getenv("AWS_SECRET_ACCESS_KEY")
if len(pw) == 0 {
return &S3Storage{}, knoxite.ErrInvalidPassword
}
}
regionAndBucketPrefix := strings.Split(URL.Path, "/")
if len(regionAndBucketPrefix) != 3 {
return &S3Storage{}, knoxite.ErrInvalidRepositoryURL
}
cl, err := minio.New(URL.Host, username, pw, ssl)
if err != nil {
return &S3Storage{}, err
}
return &S3Storage{url: URL,
client: cl,
region: regionAndBucketPrefix[1],
chunkBucket: regionAndBucketPrefix[2] + "-chunks",
snapshotBucket: regionAndBucketPrefix[2] + "-snapshots",
repositoryBucket: regionAndBucketPrefix[2] + "-repository",
}, nil
}
// Location returns the type and location of the repository.
func (backend *S3Storage) Location() string {
return backend.url.String()
}
// Close the backend.
func (backend *S3Storage) Close() error {
return nil
}
// Protocols returns the Protocol Schemes supported by this backend.
func (backend *S3Storage) Protocols() []string {
return []string{"s3", "s3s"}
}
// Description returns a user-friendly description for this backend.
func (backend *S3Storage) Description() string {
return "Amazon S3 Storage"
}
// AvailableSpace returns the free space on this backend.
func (backend *S3Storage) AvailableSpace() (uint64, error) {
return uint64(0), knoxite.ErrAvailableSpaceUnlimited
}
// LoadChunk loads a Chunk from network.
func (backend *S3Storage) LoadChunk(shasum string, part, totalParts uint) ([]byte, error) {
fileName := shasum + "." + strconv.FormatUint(uint64(part), 10) + "_" + strconv.FormatUint(uint64(totalParts), 10)
obj, err := backend.client.GetObject(backend.chunkBucket, fileName, minio.GetObjectOptions{})
if err != nil {
return nil, err
}
defer obj.Close()
return ioutil.ReadAll(obj)
}
// StoreChunk stores a single Chunk on network.
func (backend *S3Storage) StoreChunk(shasum string, part, totalParts uint, data []byte) (size uint64, err error) {
fileName := shasum + "." + strconv.FormatUint(uint64(part), 10) + "_" + strconv.FormatUint(uint64(totalParts), 10)
if _, err = backend.client.StatObject(backend.chunkBucket, fileName, minio.StatObjectOptions{}); err == nil {
// Chunk is already stored
return 0, nil
}
buf := bytes.NewBuffer(data)
i, err := backend.client.PutObject(backend.chunkBucket, fileName, buf, int64(buf.Len()), minio.PutObjectOptions{ContentType: "application/octet-stream"})
return uint64(i), err
}
// DeleteChunk deletes a single Chunk.
func (backend *S3Storage) DeleteChunk(shasum string, part, totalParts uint) error {
fileName := shasum + "." + strconv.FormatUint(uint64(part), 10) + "_" + strconv.FormatUint(uint64(totalParts), 10)
err := backend.client.RemoveObject(backend.chunkBucket, fileName)
if err != nil {
return err
}
return nil
}
// LoadSnapshot loads a snapshot.
func (backend *S3Storage) LoadSnapshot(id string) ([]byte, error) {
obj, err := backend.client.GetObject(backend.snapshotBucket, id, minio.GetObjectOptions{})
if err != nil {
return nil, err
}
defer obj.Close()
return ioutil.ReadAll(obj)
}
// SaveSnapshot stores a snapshot.
func (backend *S3Storage) SaveSnapshot(id string, data []byte) error {
buf := bytes.NewBuffer(data)
_, err := backend.client.PutObject(backend.snapshotBucket, id, buf, int64(buf.Len()), minio.PutObjectOptions{ContentType: "application/octet-stream"})
return err
}
// LoadChunkIndex reads the chunk-index.
func (backend *S3Storage) LoadChunkIndex() ([]byte, error) {
obj, err := backend.client.GetObject(backend.chunkBucket, knoxite.ChunkIndexFilename, minio.GetObjectOptions{})
if err != nil {
return nil, err
}
defer obj.Close()
return ioutil.ReadAll(obj)
}
// SaveChunkIndex stores the chunk-index.
func (backend *S3Storage) SaveChunkIndex(data []byte) error {
buf := bytes.NewBuffer(data)
_, err := backend.client.PutObject(backend.chunkBucket, knoxite.ChunkIndexFilename, buf, int64(buf.Len()), minio.PutObjectOptions{ContentType: "application/octet-stream"})
return err
}
// InitRepository creates a new repository.
func (backend *S3Storage) InitRepository() error {
chunkBucketExist, err := backend.client.BucketExists(backend.chunkBucket)
if err != nil {
return err
}
if !chunkBucketExist {
err = backend.client.MakeBucket(backend.chunkBucket, backend.region)
if err != nil {
return err
}
} else {
return knoxite.ErrRepositoryExists
}
snapshotBucketExist, err := backend.client.BucketExists(backend.snapshotBucket)
if err != nil {
return err
}
if !snapshotBucketExist {
err = backend.client.MakeBucket(backend.snapshotBucket, backend.region)
if err != nil {
return err
}
} else {
return knoxite.ErrRepositoryExists
}
repositoryBucketExist, err := backend.client.BucketExists(backend.repositoryBucket)
if err != nil {
return err
}
if !repositoryBucketExist {
err = backend.client.MakeBucket(backend.repositoryBucket, backend.region)
if err != nil {
return err
}
} else {
return knoxite.ErrRepositoryExists
}
return nil
}
// LoadRepository reads the metadata for a repository.
func (backend *S3Storage) LoadRepository() ([]byte, error) {
obj, err := backend.client.GetObject(backend.repositoryBucket, knoxite.RepoFilename, minio.GetObjectOptions{})
if err != nil {
return nil, err
}
defer obj.Close()
return ioutil.ReadAll(obj)
}
// SaveRepository stores the metadata for a repository.
func (backend *S3Storage) SaveRepository(data []byte) error {
buf := bytes.NewBuffer(data)
_, err := backend.client.PutObject(backend.repositoryBucket, knoxite.RepoFilename, buf, int64(buf.Len()), minio.PutObjectOptions{ContentType: "application/octet-stream"})
return err
}