forked from denverdino/aliyungo
-
Notifications
You must be signed in to change notification settings - Fork 1
/
client.go
449 lines (394 loc) · 9.39 KB
/
client.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
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
package metadata
import (
"errors"
"fmt"
"io"
"io/ioutil"
"net"
"net/http"
"net/url"
"strings"
"time"
"encoding/json"
"reflect"
"os"
"github.com/bjlhlin/aliyungo/util"
)
const (
ENDPOINT = "http://100.100.100.200"
META_VERSION_LATEST = "latest"
RS_TYPE_META_DATA = "meta-data"
RS_TYPE_USER_DATA = "user-data"
DNS_NAMESERVERS = "dns-conf/nameservers"
EIPV4 = "eipv4"
HOSTNAME = "hostname"
IMAGE_ID = "image-id"
INSTANCE_ID = "instance-id"
MAC = "mac"
NETWORK_TYPE = "network-type"
NTP_CONF_SERVERS = "ntp-conf/ntp-servers"
OWNER_ACCOUNT_ID = "owner-account-id"
PRIVATE_IPV4 = "private-ipv4"
REGION = "region-id"
SERIAL_NUMBER = "serial-number"
SOURCE_ADDRESS = "source-address"
VPC_CIDR_BLOCK = "vpc-cidr-block"
VPC_ID = "vpc-id"
VSWITCH_CIDR_BLOCK = "vswitch-cidr-block"
VSWITCH_ID = "vswitch-id"
ZONE = "zone-id"
RAM_SECURITY = "ram/security-credentials"
)
type IMetaDataRequest interface {
Version(version string) IMetaDataRequest
ResourceType(rtype string) IMetaDataRequest
Resource(resource string) IMetaDataRequest
SubResource(sub string) IMetaDataRequest
Url() (string, error)
Do(api interface{}) error
}
type MetaData struct {
// mock for unit test.
mock requestMock
client *http.Client
}
func NewMetaData(client *http.Client) *MetaData {
if client == nil {
client = &http.Client{}
}
return &MetaData{
client: client,
}
}
func NewMockMetaData(client *http.Client, sendRequest requestMock) *MetaData {
if client == nil {
client = &http.Client{}
}
return &MetaData{
client: client,
mock: sendRequest,
}
}
func (m *MetaData) New() *MetaDataRequest {
return &MetaDataRequest{
client: m.client,
sendRequest: m.mock,
}
}
func (m *MetaData) HostName() (string, error) {
var hostname ResultList
err := m.New().Resource(HOSTNAME).Do(&hostname)
if err != nil {
return "", err
}
return hostname.result[0], nil
}
func (m *MetaData) ImageID() (string, error) {
var image ResultList
err := m.New().Resource(IMAGE_ID).Do(&image)
if err != nil {
return "", err
}
return image.result[0], err
}
func (m *MetaData) InstanceID() (string, error) {
var instanceid ResultList
err := m.New().Resource(INSTANCE_ID).Do(&instanceid)
if err != nil {
return "", err
}
return instanceid.result[0], err
}
func (m *MetaData) Mac() (string, error) {
var mac ResultList
err := m.New().Resource(MAC).Do(&mac)
if err != nil {
return "", err
}
return mac.result[0], nil
}
func (m *MetaData) NetworkType() (string, error) {
var network ResultList
err := m.New().Resource(NETWORK_TYPE).Do(&network)
if err != nil {
return "", err
}
return network.result[0], nil
}
func (m *MetaData) OwnerAccountID() (string, error) {
var owner ResultList
err := m.New().Resource(OWNER_ACCOUNT_ID).Do(&owner)
if err != nil {
return "", err
}
return owner.result[0], nil
}
func (m *MetaData) PrivateIPv4() (string, error) {
var private ResultList
err := m.New().Resource(PRIVATE_IPV4).Do(&private)
if err != nil {
return "", err
}
return private.result[0], nil
}
func (m *MetaData) Region() (string, error) {
var region ResultList
err := m.New().Resource(REGION).Do(®ion)
if err != nil {
return "", err
}
return region.result[0], nil
}
func (m *MetaData) SerialNumber() (string, error) {
var serial ResultList
err := m.New().Resource(SERIAL_NUMBER).Do(&serial)
if err != nil {
return "", err
}
return serial.result[0], nil
}
func (m *MetaData) SourceAddress() (string, error) {
var source ResultList
err := m.New().Resource(SOURCE_ADDRESS).Do(&source)
if err != nil {
return "", err
}
return source.result[0], nil
}
func (m *MetaData) VpcCIDRBlock() (string, error) {
var vpcCIDR ResultList
err := m.New().Resource(VPC_CIDR_BLOCK).Do(&vpcCIDR)
if err != nil {
return "", err
}
return vpcCIDR.result[0], err
}
func (m *MetaData) VpcID() (string, error) {
var vpcId ResultList
err := m.New().Resource(VPC_ID).Do(&vpcId)
if err != nil {
return "", err
}
return vpcId.result[0], err
}
func (m *MetaData) VswitchCIDRBlock() (string, error) {
var cidr ResultList
err := m.New().Resource(VSWITCH_CIDR_BLOCK).Do(&cidr)
if err != nil {
return "", err
}
return cidr.result[0], err
}
func (m *MetaData) VswitchID() (string, error) {
var vswithcid ResultList
err := m.New().Resource(VSWITCH_ID).Do(&vswithcid)
if err != nil {
return "", err
}
return vswithcid.result[0], err
}
func (m *MetaData) EIPv4() (string, error) {
var eip ResultList
err := m.New().Resource(EIPV4).Do(&eip)
if err != nil {
return "", err
}
return eip.result[0], nil
}
func (m *MetaData) DNSNameServers() ([]string, error) {
var data ResultList
err := m.New().Resource(DNS_NAMESERVERS).Do(&data)
if err != nil {
return []string{}, err
}
return data.result, nil
}
func (m *MetaData) NTPConfigServers() ([]string, error) {
var data ResultList
err := m.New().Resource(NTP_CONF_SERVERS).Do(&data)
if err != nil {
return []string{}, err
}
return data.result, nil
}
func (m *MetaData) Zone() (string, error) {
var zone ResultList
err := m.New().Resource(ZONE).Do(&zone)
if err != nil {
return "", err
}
return zone.result[0], nil
}
func (m *MetaData) RoleName() (string, error) {
var roleName ResultList
err := m.New().Resource("ram/security-credentials/").Do(&roleName)
if err != nil {
return "", err
}
return roleName.result[0], nil
}
func (m *MetaData) RamRoleToken(role string) (RoleAuth, error) {
var roleauth RoleAuth
err := m.New().Resource(RAM_SECURITY).SubResource(role).Do(&roleauth)
if err != nil {
return RoleAuth{}, err
}
return roleauth, nil
}
type requestMock func(resource string) (string, error)
//
type MetaDataRequest struct {
version string
resourceType string
resource string
subResource string
client *http.Client
sendRequest requestMock
}
func (vpc *MetaDataRequest) Version(version string) IMetaDataRequest {
vpc.version = version
return vpc
}
func (vpc *MetaDataRequest) ResourceType(rtype string) IMetaDataRequest {
vpc.resourceType = rtype
return vpc
}
func (vpc *MetaDataRequest) Resource(resource string) IMetaDataRequest {
vpc.resource = resource
return vpc
}
func (vpc *MetaDataRequest) SubResource(sub string) IMetaDataRequest {
vpc.subResource = sub
return vpc
}
var retry = util.AttemptStrategy{
Min: 5,
Total: 5 * time.Second,
Delay: 200 * time.Millisecond,
}
func (vpc *MetaDataRequest) Url() (string, error) {
if vpc.version == "" {
vpc.version = "latest"
}
if vpc.resourceType == "" {
vpc.resourceType = "meta-data"
}
if vpc.resource == "" {
return "", errors.New("the resource you want to visit must not be nil!")
}
endpoint := os.Getenv("METADATA_ENDPOINT")
if endpoint == "" {
endpoint = ENDPOINT
}
r := fmt.Sprintf("%s/%s/%s/%s", endpoint, vpc.version, vpc.resourceType, vpc.resource)
if vpc.subResource == "" {
return r, nil
}
return fmt.Sprintf("%s/%s", r, vpc.subResource), nil
}
func (vpc *MetaDataRequest) Do(api interface{}) (err error) {
var res = ""
for r := retry.Start(); r.Next(); {
if vpc.sendRequest != nil {
res, err = vpc.sendRequest(vpc.resource)
} else {
res, err = vpc.send()
}
if !shouldRetry(err) {
break
}
}
if err != nil {
return err
}
return vpc.Decode(res, api)
}
func (vpc *MetaDataRequest) Decode(data string, api interface{}) error {
if data == "" {
url, _ := vpc.Url()
return fmt.Errorf("metadata: alivpc decode data must not be nil. url=[%s]\n", url)
}
switch api.(type) {
case *ResultList:
api.(*ResultList).result = strings.Split(data, "\n")
return nil
case *RoleAuth:
return json.Unmarshal([]byte(data), api)
default:
return fmt.Errorf("metadata: unknow type to decode, type=%s\n", reflect.TypeOf(api))
}
}
func (vpc *MetaDataRequest) send() (string, error) {
url, err := vpc.Url()
if err != nil {
return "", err
}
requ, err := http.NewRequest(http.MethodGet, url, nil)
if err != nil {
return "", err
}
resp, err := vpc.client.Do(requ)
if err != nil {
return "", err
}
if resp.StatusCode != 200 {
return "", fmt.Errorf("Aliyun Metadata API Error: Status Code: %d", resp.StatusCode)
}
defer resp.Body.Close()
data, err := ioutil.ReadAll(resp.Body)
if err != nil {
return "", err
}
return string(data), nil
}
type TimeoutError interface {
error
Timeout() bool // Is the error a timeout?
}
func shouldRetry(err error) bool {
if err == nil {
return false
}
_, ok := err.(TimeoutError)
if ok {
return true
}
switch err {
case io.ErrUnexpectedEOF, io.EOF:
return true
}
switch e := err.(type) {
case *net.DNSError:
return true
case *net.OpError:
switch e.Op {
case "read", "write":
return true
}
case *url.Error:
// url.Error can be returned either by net/url if a URL cannot be
// parsed, or by net/http if the response is closed before the headers
// are received or parsed correctly. In that later case, e.Op is set to
// the HTTP method name with the first letter uppercased. We don't want
// to retry on POST operations, since those are not idempotent, all the
// other ones should be safe to retry.
switch e.Op {
case "Get", "Put", "Delete", "Head":
return shouldRetry(e.Err)
default:
return false
}
}
return false
}
type ResultList struct {
result []string
}
type RoleAuth struct {
AccessKeyId string
AccessKeySecret string
Expiration time.Time
SecurityToken string
LastUpdated time.Time
Code string
}