/
s3.go
242 lines (212 loc) · 5.96 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
package aws
import (
"crypto/md5"
"fmt"
"io"
"net/http"
"net/url"
"os"
"path"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/awserr"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/s3"
"github.com/aws/aws-sdk-go/service/s3/s3iface"
"github.com/aws/aws-sdk-go/service/s3/s3manager"
"github.com/stelligent/mu/common"
)
type s3ArtifactManager struct {
s3API s3iface.S3API
sess *session.Session
dryrunPath string
}
func newArtifactManager(sess *session.Session, dryrunPath string) (common.ArtifactManager, error) {
log.Debug("Connecting to S3 service")
s3API := s3.New(sess)
return &s3ArtifactManager{
s3API: s3API,
sess: sess,
dryrunPath: dryrunPath,
}, nil
}
// CreateArtifact get the instances for a specific cluster
func (s3Mgr *s3ArtifactManager) CreateArtifact(body io.ReadSeeker, destURL string, kmsKey string) error {
s3API := s3Mgr.s3API
s3URL, err := url.Parse(destURL)
if err != nil {
return err
}
if s3URL.Scheme != "s3" {
return fmt.Errorf("destURL must have scheme of 's3', received '%s'", s3URL.Scheme)
}
// start from the begining
body.Seek(0, 0)
if s3Mgr.dryrunPath != "" {
err := os.MkdirAll(s3Mgr.dryrunPath, 0700)
if err != nil {
return err
}
artifactFile := fmt.Sprintf("%s/%s-%s", s3Mgr.dryrunPath, s3URL.Host, path.Base(s3URL.Path))
f, err := os.OpenFile(artifactFile, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0600)
if err != nil {
return err
}
_, err = io.Copy(f, body)
if err != nil {
return err
}
log.Infof(" DRYRUN: Skipping PUT of artifact '%s'. Written to '%s'", destURL, artifactFile)
return nil
}
params := &s3.PutObjectInput{
Bucket: aws.String(s3URL.Host),
Key: aws.String(s3URL.Path),
Body: body,
}
if kmsKey != "" {
params.SSEKMSKeyId = aws.String(kmsKey)
params.ServerSideEncryption = aws.String("aws:kms")
}
log.Debugf("Creating artifact at '%s'", destURL)
_, err = s3API.PutObject(params)
if err != nil {
return err
}
return nil
}
func (s3Mgr *s3ArtifactManager) getArtifactS3(url *url.URL, etag string) (io.ReadCloser, string, error) {
region, err := s3manager.GetBucketRegionWithClient(aws.BackgroundContext(), s3Mgr.s3API, url.Host)
if err != nil {
return nil, "", err
}
s3api := s3Mgr.s3API
if aws.StringValue(s3Mgr.sess.Config.Region) != region {
s3api = s3.New(s3Mgr.sess, aws.NewConfig().WithRegion(region))
}
input := &s3.GetObjectInput{
Bucket: aws.String(url.Host),
Key: aws.String(url.Path),
IfNoneMatch: aws.String(etag),
}
resp, err := s3api.GetObject(input)
if err != nil {
if aerr, ok := err.(awserr.Error); ok {
if aerr.Code() == "NotModified" {
return resp.Body, etag, nil
}
}
return nil, "", err
}
return resp.Body, aws.StringValue(resp.ETag), nil
}
func (s3Mgr *s3ArtifactManager) getArtifactHTTP(url *url.URL, etag string) (io.ReadCloser, string, error) {
req, err := http.NewRequest("GET", url.String(), nil)
if err != nil {
return nil, "", err
}
client := &http.Client{}
req.Header.Add("If-None-Match", etag)
resp, err := client.Do(req)
if err != nil {
return nil, "", err
}
if resp.StatusCode == 304 {
return nil, etag, nil
}
return resp.Body, resp.Header.Get(http.CanonicalHeaderKey("etag")), nil
}
func (s3Mgr *s3ArtifactManager) getArtifactFile(url *url.URL, etag string) (io.ReadCloser, string, error) {
newEtag, err := md5File(url.Path)
if err != nil {
return nil, "", err
}
if etag == "" || etag != newEtag {
body, err := os.Open(url.Path)
return body, newEtag, err
}
return nil, newEtag, nil
}
// GetArtifact get the artifact conditionally by etag.
func (s3Mgr *s3ArtifactManager) GetArtifact(uri string, etag string) (body io.ReadCloser, etagRet string, err error) {
url, err := url.Parse(uri)
if err != nil {
return nil, "", err
}
switch url.Scheme {
case "s3":
body, etagRet, err = s3Mgr.getArtifactS3(url, etag)
case "http":
fallthrough
case "https":
body, etagRet, err = s3Mgr.getArtifactHTTP(url, etag)
case "file":
body, etagRet, err = s3Mgr.getArtifactFile(url, etag)
default:
body = nil
etagRet = ""
err = fmt.Errorf("unknown scheme on URL '%s'", url)
}
return
}
func md5File(path string) (string, error) {
f, err := os.Open(path)
if err != nil {
return "", err
}
defer f.Close()
h := md5.New()
if _, err := io.Copy(h, f); err != nil {
return "", err
}
return fmt.Sprintf("%x", h.Sum(nil)), nil
}
// EmptyBucket to empty bucket
func (s3Mgr *s3ArtifactManager) EmptyBucket(bucketName string) error {
if s3Mgr.dryrunPath != "" {
log.Infof(" DRYRUN: Skipping emptying of bucket '%s'", bucketName)
return nil
}
log.Infof(" Emptying bucket '%s'", bucketName)
params := &s3.ListObjectsInput{
Bucket: aws.String(bucketName),
}
for {
//Requesting for batch of objects from s3 bucket
objects, err := s3Mgr.s3API.ListObjects(params)
if err != nil {
return err
}
//Checks if the bucket is already empty
if len((*objects).Contents) == 0 {
log.Debug("Bucket is already empty")
return nil
}
log.Debug("First object in batch | ", *(objects.Contents[0].Key))
//creating an array of pointers of ObjectIdentifier
objectsToDelete := make([]*s3.ObjectIdentifier, 0, 1000)
for _, object := range (*objects).Contents {
obj := s3.ObjectIdentifier{
Key: object.Key,
}
objectsToDelete = append(objectsToDelete, &obj)
}
//Creating JSON payload for bulk delete
deleteArray := s3.Delete{Objects: objectsToDelete}
deleteParams := &s3.DeleteObjectsInput{
Bucket: aws.String(bucketName),
Delete: &deleteArray,
}
//Running the Bulk delete job (limit 1000)
_, err = s3Mgr.s3API.DeleteObjects(deleteParams)
if err != nil {
return err
}
if *(*objects).IsTruncated { //if there are more objects in the bucket, IsTruncated = true
params.Marker = (*deleteParams).Delete.Objects[len((*deleteParams).Delete.Objects)-1].Key
log.Debug("Requesting next batch | ", *(params.Marker))
} else { //if all objects in the bucket have been cleaned up.
break
}
}
return nil
}