-
Notifications
You must be signed in to change notification settings - Fork 1
/
openstack.go
752 lines (647 loc) · 21.2 KB
/
openstack.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
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
/*
Copyright 2014 The Kubernetes Authors All rights reserved.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package openstack
import (
"encoding/json"
"errors"
"fmt"
"io"
"io/ioutil"
"net/http"
"path"
"regexp"
"strings"
"time"
"gopkg.in/gcfg.v1"
"github.com/rackspace/gophercloud"
"github.com/rackspace/gophercloud/openstack"
"github.com/rackspace/gophercloud/openstack/blockstorage/v1/volumes"
"github.com/rackspace/gophercloud/openstack/compute/v2/extensions/volumeattach"
"github.com/rackspace/gophercloud/openstack/compute/v2/flavors"
"github.com/rackspace/gophercloud/openstack/compute/v2/servers"
"github.com/rackspace/gophercloud/pagination"
"github.com/golang/glog"
"k8s.io/kubernetes/pkg/api"
"k8s.io/kubernetes/pkg/api/resource"
"k8s.io/kubernetes/pkg/cloudprovider"
)
const ProviderName = "openstack"
// metadataUrl is URL to OpenStack metadata server. It's hadrcoded IPv4
// link-local address as documented in "OpenStack Cloud Administrator Guide",
// chapter Compute - Networking with nova-network.
// http://docs.openstack.org/admin-guide-cloud/compute-networking-nova.html#metadata-service
const metadataUrl = "http://169.254.169.254/openstack/2012-08-10/meta_data.json"
var ErrNotFound = errors.New("Failed to find object")
var ErrMultipleResults = errors.New("Multiple results where only one expected")
var ErrNoAddressFound = errors.New("No address found for host")
var ErrAttrNotFound = errors.New("Expected attribute not found")
const (
MiB = 1024 * 1024
GB = 1000 * 1000 * 1000
)
// encoding.TextUnmarshaler interface for time.Duration
type MyDuration struct {
time.Duration
}
func (d *MyDuration) UnmarshalText(text []byte) error {
res, err := time.ParseDuration(string(text))
if err != nil {
return err
}
d.Duration = res
return nil
}
type LoadBalancer struct {
network *gophercloud.ServiceClient
compute *gophercloud.ServiceClient
opts LoadBalancerOpts
}
type LoadBalancerOpts struct {
LBVersion string `gcfg:"lb-version"` // v1 or v2
SubnetId string `gcfg:"subnet-id"` // required
FloatingNetworkId string `gcfg:"floating-network-id"`
LBMethod string `gcfg:"lb-method"`
CreateMonitor bool `gcfg:"create-monitor"`
MonitorDelay MyDuration `gcfg:"monitor-delay"`
MonitorTimeout MyDuration `gcfg:"monitor-timeout"`
MonitorMaxRetries uint `gcfg:"monitor-max-retries"`
}
// OpenStack is an implementation of cloud provider Interface for OpenStack.
type OpenStack struct {
provider *gophercloud.ProviderClient
region string
lbOpts LoadBalancerOpts
// InstanceID of the server where this OpenStack object is instantiated.
localInstanceID string
}
type Config struct {
Global struct {
AuthUrl string `gcfg:"auth-url"`
Username string
UserId string `gcfg:"user-id"`
Password string
ApiKey string `gcfg:"api-key"`
TenantId string `gcfg:"tenant-id"`
TenantName string `gcfg:"tenant-name"`
DomainId string `gcfg:"domain-id"`
DomainName string `gcfg:"domain-name"`
Region string
}
LoadBalancer LoadBalancerOpts
}
func init() {
cloudprovider.RegisterCloudProvider(ProviderName, func(config io.Reader) (cloudprovider.Interface, error) {
cfg, err := readConfig(config)
if err != nil {
return nil, err
}
return newOpenStack(cfg)
})
}
func (cfg Config) toAuthOptions() gophercloud.AuthOptions {
return gophercloud.AuthOptions{
IdentityEndpoint: cfg.Global.AuthUrl,
Username: cfg.Global.Username,
UserID: cfg.Global.UserId,
Password: cfg.Global.Password,
APIKey: cfg.Global.ApiKey,
TenantID: cfg.Global.TenantId,
TenantName: cfg.Global.TenantName,
DomainID: cfg.Global.DomainId,
DomainName: cfg.Global.DomainName,
// Persistent service, so we need to be able to renew tokens.
AllowReauth: true,
}
}
func readConfig(config io.Reader) (Config, error) {
if config == nil {
err := fmt.Errorf("no OpenStack cloud provider config file given")
return Config{}, err
}
var cfg Config
err := gcfg.ReadInto(&cfg, config)
return cfg, err
}
// parseMetadataUUID reads JSON from OpenStack metadata server and parses
// instance ID out of it.
func parseMetadataUUID(jsonData []byte) (string, error) {
// We should receive an object with { 'uuid': '<uuid>' } and couple of other
// properties (which we ignore).
obj := struct{ UUID string }{}
err := json.Unmarshal(jsonData, &obj)
if err != nil {
return "", err
}
uuid := obj.UUID
if uuid == "" {
err = fmt.Errorf("cannot parse OpenStack metadata, got empty uuid")
return "", err
}
return uuid, nil
}
func readInstanceID() (string, error) {
// Try to find instance ID on the local filesystem (created by cloud-init)
const instanceIDFile = "/var/lib/cloud/data/instance-id"
idBytes, err := ioutil.ReadFile(instanceIDFile)
if err == nil {
instanceID := string(idBytes)
instanceID = strings.TrimSpace(instanceID)
glog.V(3).Infof("Got instance id from %s: %s", instanceIDFile, instanceID)
if instanceID != "" {
return instanceID, nil
}
// Fall through with empty instanceID and try metadata server.
}
glog.V(5).Infof("Cannot read %s: '%v', trying metadata server", instanceIDFile, err)
// Try to get JSON from metdata server.
resp, err := http.Get(metadataUrl)
if err != nil {
glog.V(3).Infof("Cannot read %s: %v", metadataUrl, err)
return "", err
}
if resp.StatusCode != 200 {
err = fmt.Errorf("got unexpected status code when reading metadata from %s: %s", metadataUrl, resp.Status)
glog.V(3).Infof("%v", err)
return "", err
}
defer resp.Body.Close()
bodyBytes, err := ioutil.ReadAll(resp.Body)
if err != nil {
glog.V(3).Infof("Cannot get HTTP response body from %s: %v", metadataUrl, err)
return "", err
}
instanceID, err := parseMetadataUUID(bodyBytes)
if err != nil {
glog.V(3).Infof("Cannot parse instance ID from metadata from %s: %v", metadataUrl, err)
return "", err
}
glog.V(3).Infof("Got instance id from %s: %s", metadataUrl, instanceID)
return instanceID, nil
}
func newOpenStack(cfg Config) (*OpenStack, error) {
provider, err := openstack.AuthenticatedClient(cfg.toAuthOptions())
if err != nil {
return nil, err
}
id, err := readInstanceID()
if err != nil {
return nil, err
}
os := OpenStack{
provider: provider,
region: cfg.Global.Region,
lbOpts: cfg.LoadBalancer,
localInstanceID: id,
}
return &os, nil
}
type Instances struct {
compute *gophercloud.ServiceClient
flavor_to_resource map[string]*api.NodeResources // keyed by flavor id
}
// Instances returns an implementation of Instances for OpenStack.
func (os *OpenStack) Instances() (cloudprovider.Instances, bool) {
glog.V(4).Info("openstack.Instances() called")
compute, err := openstack.NewComputeV2(os.provider, gophercloud.EndpointOpts{
Region: os.region,
})
if err != nil {
glog.Warningf("Failed to find compute endpoint: %v", err)
return nil, false
}
pager := flavors.ListDetail(compute, nil)
flavor_to_resource := make(map[string]*api.NodeResources)
err = pager.EachPage(func(page pagination.Page) (bool, error) {
flavorList, err := flavors.ExtractFlavors(page)
if err != nil {
return false, err
}
for _, flavor := range flavorList {
rsrc := api.NodeResources{
Capacity: api.ResourceList{
api.ResourceCPU: *resource.NewQuantity(int64(flavor.VCPUs), resource.DecimalSI),
api.ResourceMemory: *resource.NewQuantity(int64(flavor.RAM)*MiB, resource.BinarySI),
"openstack.org/disk": *resource.NewQuantity(int64(flavor.Disk)*GB, resource.DecimalSI),
"openstack.org/rxTxFactor": *resource.NewMilliQuantity(int64(flavor.RxTxFactor)*1000, resource.DecimalSI),
"openstack.org/swap": *resource.NewQuantity(int64(flavor.Swap)*MiB, resource.BinarySI),
},
}
flavor_to_resource[flavor.ID] = &rsrc
}
return true, nil
})
if err != nil {
glog.Warningf("Failed to find compute flavors: %v", err)
return nil, false
}
glog.V(3).Infof("Found %v compute flavors", len(flavor_to_resource))
glog.V(1).Info("Claiming to support Instances")
return &Instances{compute, flavor_to_resource}, true
}
func (i *Instances) List(name_filter string) ([]string, error) {
glog.V(4).Infof("openstack List(%v) called", name_filter)
opts := servers.ListOpts{
Name: name_filter,
Status: "ACTIVE",
}
pager := servers.List(i.compute, opts)
ret := make([]string, 0)
err := pager.EachPage(func(page pagination.Page) (bool, error) {
sList, err := servers.ExtractServers(page)
if err != nil {
return false, err
}
for _, server := range sList {
ret = append(ret, server.Name)
}
return true, nil
})
if err != nil {
return nil, err
}
glog.V(3).Infof("Found %v instances matching %v: %v",
len(ret), name_filter, ret)
return ret, nil
}
func getServerByName(client *gophercloud.ServiceClient, name string) (*servers.Server, error) {
opts := servers.ListOpts{
Name: fmt.Sprintf("^%s$", regexp.QuoteMeta(name)),
Status: "ACTIVE",
}
pager := servers.List(client, opts)
serverList := make([]servers.Server, 0, 1)
err := pager.EachPage(func(page pagination.Page) (bool, error) {
s, err := servers.ExtractServers(page)
if err != nil {
return false, err
}
serverList = append(serverList, s...)
if len(serverList) > 1 {
return false, ErrMultipleResults
}
return true, nil
})
if err != nil {
return nil, err
}
if len(serverList) == 0 {
return nil, ErrNotFound
} else if len(serverList) > 1 {
return nil, ErrMultipleResults
}
return &serverList[0], nil
}
func getAddressesByName(client *gophercloud.ServiceClient, name string) ([]api.NodeAddress, error) {
srv, err := getServerByName(client, name)
if err != nil {
return nil, err
}
addrs := []api.NodeAddress{}
for network, netblob := range srv.Addresses {
list, ok := netblob.([]interface{})
if !ok {
continue
}
for _, item := range list {
var addressType api.NodeAddressType
props, ok := item.(map[string]interface{})
if !ok {
continue
}
extIPType, ok := props["OS-EXT-IPS:type"]
if (ok && extIPType == "floating") || (!ok && network == "public") {
addressType = api.NodeExternalIP
} else {
addressType = api.NodeInternalIP
}
tmp, ok := props["addr"]
if !ok {
continue
}
addr, ok := tmp.(string)
if !ok {
continue
}
api.AddToNodeAddresses(&addrs,
api.NodeAddress{
Type: addressType,
Address: addr,
},
)
}
}
// AccessIPs are usually duplicates of "public" addresses.
if srv.AccessIPv4 != "" {
api.AddToNodeAddresses(&addrs,
api.NodeAddress{
Type: api.NodeExternalIP,
Address: srv.AccessIPv4,
},
)
}
if srv.AccessIPv6 != "" {
api.AddToNodeAddresses(&addrs,
api.NodeAddress{
Type: api.NodeExternalIP,
Address: srv.AccessIPv6,
},
)
}
return addrs, nil
}
func getAddressByName(client *gophercloud.ServiceClient, name string) (string, error) {
addrs, err := getAddressesByName(client, name)
if err != nil {
return "", err
} else if len(addrs) == 0 {
return "", ErrNoAddressFound
}
for _, addr := range addrs {
if addr.Type == api.NodeInternalIP {
return addr.Address, nil
}
}
return addrs[0].Address, nil
}
// Implementation of Instances.CurrentNodeName
func (i *Instances) CurrentNodeName(hostname string) (string, error) {
return hostname, nil
}
func (i *Instances) AddSSHKeyToAllInstances(user string, keyData []byte) error {
return errors.New("unimplemented")
}
func (i *Instances) NodeAddresses(name string) ([]api.NodeAddress, error) {
glog.V(4).Infof("NodeAddresses(%v) called", name)
addrs, err := getAddressesByName(i.compute, name)
if err != nil {
return nil, err
}
glog.V(4).Infof("NodeAddresses(%v) => %v", name, addrs)
return addrs, nil
}
// ExternalID returns the cloud provider ID of the specified instance (deprecated).
func (i *Instances) ExternalID(name string) (string, error) {
srv, err := getServerByName(i.compute, name)
if err != nil {
return "", err
}
return srv.ID, nil
}
// InstanceID returns the kubelet's cloud provider ID.
func (os *OpenStack) InstanceID() (string, error) {
return os.localInstanceID, nil
}
// InstanceID returns the cloud provider ID of the specified instance.
func (i *Instances) InstanceID(name string) (string, error) {
srv, err := getServerByName(i.compute, name)
if err != nil {
return "", err
}
// In the future it is possible to also return an endpoint as:
// <endpoint>/<instanceid>
return "/" + srv.ID, nil
}
// InstanceType returns the type of the specified instance.
func (i *Instances) InstanceType(name string) (string, error) {
return "", nil
}
func (os *OpenStack) Clusters() (cloudprovider.Clusters, bool) {
return nil, false
}
// ProviderName returns the cloud provider ID.
func (os *OpenStack) ProviderName() string {
return ProviderName
}
// ScrubDNS filters DNS settings for pods.
func (os *OpenStack) ScrubDNS(nameservers, searches []string) (nsOut, srchOut []string) {
return nameservers, searches
}
func (os *OpenStack) LoadBalancer() (cloudprovider.LoadBalancer, bool) {
glog.V(4).Info("openstack.LoadBalancer() called")
// TODO: Search for and support Rackspace loadbalancer API, and others.
network, err := openstack.NewNetworkV2(os.provider, gophercloud.EndpointOpts{
Region: os.region,
})
if err != nil {
glog.Warningf("Failed to find neutron endpoint: %v", err)
return nil, false
}
compute, err := openstack.NewComputeV2(os.provider, gophercloud.EndpointOpts{
Region: os.region,
})
if err != nil {
glog.Warningf("Failed to find compute endpoint: %v", err)
return nil, false
}
glog.V(1).Info("Claiming to support LoadBalancer")
if os.lbOpts.LBVersion == "v2" {
return &LbaasV2{LoadBalancer{network, compute, os.lbOpts}}, true
} else {
return &LbaasV1{LoadBalancer{network, compute, os.lbOpts}}, true
}
}
func isNotFound(err error) bool {
e, ok := err.(*gophercloud.UnexpectedResponseCodeError)
return ok && e.Actual == http.StatusNotFound
}
func (os *OpenStack) Zones() (cloudprovider.Zones, bool) {
glog.V(1).Info("Claiming to support Zones")
return os, true
}
func (os *OpenStack) GetZone() (cloudprovider.Zone, error) {
glog.V(1).Infof("Current zone is %v", os.region)
return cloudprovider.Zone{Region: os.region}, nil
}
func (os *OpenStack) Routes() (cloudprovider.Routes, bool) {
return nil, false
}
// Attaches given cinder volume to the compute running kubelet
func (os *OpenStack) AttachDisk(instanceID string, diskName string) (string, error) {
disk, err := os.getVolume(diskName)
if err != nil {
return "", err
}
cClient, err := openstack.NewComputeV2(os.provider, gophercloud.EndpointOpts{
Region: os.region,
})
if err != nil || cClient == nil {
glog.Errorf("Unable to initialize nova client for region: %s", os.region)
return "", err
}
if len(disk.Attachments) > 0 && disk.Attachments[0]["server_id"] != nil {
if instanceID == disk.Attachments[0]["server_id"] {
glog.V(4).Infof("Disk: %q is already attached to compute: %q", diskName, instanceID)
return disk.ID, nil
} else {
errMsg := fmt.Sprintf("Disk %q is attached to a different compute: %q, should be detached before proceeding", diskName, disk.Attachments[0]["server_id"])
glog.Errorf(errMsg)
return "", errors.New(errMsg)
}
}
// add read only flag here if possible spothanis
_, err = volumeattach.Create(cClient, instanceID, &volumeattach.CreateOpts{
VolumeID: disk.ID,
}).Extract()
if err != nil {
glog.Errorf("Failed to attach %s volume to %s compute", diskName, instanceID)
return "", err
}
glog.V(2).Infof("Successfully attached %s volume to %s compute", diskName, instanceID)
return disk.ID, nil
}
// Detaches given cinder volume from the compute running kubelet
func (os *OpenStack) DetachDisk(instanceID string, partialDiskId string) error {
disk, err := os.getVolume(partialDiskId)
if err != nil {
return err
}
cClient, err := openstack.NewComputeV2(os.provider, gophercloud.EndpointOpts{
Region: os.region,
})
if err != nil || cClient == nil {
glog.Errorf("Unable to initialize nova client for region: %s", os.region)
return err
}
if len(disk.Attachments) > 0 && disk.Attachments[0]["server_id"] != nil && instanceID == disk.Attachments[0]["server_id"] {
// This is a blocking call and effects kubelet's performance directly.
// We should consider kicking it out into a separate routine, if it is bad.
err = volumeattach.Delete(cClient, instanceID, disk.ID).ExtractErr()
if err != nil {
glog.Errorf("Failed to delete volume %s from compute %s attached %v", disk.ID, instanceID, err)
return err
}
glog.V(2).Infof("Successfully detached volume: %s from compute: %s", disk.ID, instanceID)
} else {
errMsg := fmt.Sprintf("Disk: %s has no attachments or is not attached to compute: %s", disk.Name, instanceID)
glog.Errorf(errMsg)
return errors.New(errMsg)
}
return nil
}
// Takes a partial/full disk id or diskname
func (os *OpenStack) getVolume(diskName string) (volumes.Volume, error) {
sClient, err := openstack.NewBlockStorageV1(os.provider, gophercloud.EndpointOpts{
Region: os.region,
})
var volume volumes.Volume
if err != nil || sClient == nil {
glog.Errorf("Unable to initialize cinder client for region: %s", os.region)
return volume, err
}
err = volumes.List(sClient, nil).EachPage(func(page pagination.Page) (bool, error) {
vols, err := volumes.ExtractVolumes(page)
if err != nil {
glog.Errorf("Failed to extract volumes: %v", err)
return false, err
} else {
for _, v := range vols {
glog.V(4).Infof("%s %s %v", v.ID, v.Name, v.Attachments)
if v.Name == diskName || strings.Contains(v.ID, diskName) {
volume = v
return true, nil
}
}
}
// if it reached here then no disk with the given name was found.
errmsg := fmt.Sprintf("Unable to find disk: %s in region %s", diskName, os.region)
return false, errors.New(errmsg)
})
if err != nil {
glog.Errorf("Error occured getting volume: %s", diskName)
return volume, err
}
return volume, err
}
// Create a volume of given size (in GiB)
func (os *OpenStack) CreateVolume(name string, size int, tags *map[string]string) (volumeName string, err error) {
sClient, err := openstack.NewBlockStorageV1(os.provider, gophercloud.EndpointOpts{
Region: os.region,
})
if err != nil || sClient == nil {
glog.Errorf("Unable to initialize cinder client for region: %s", os.region)
return "", err
}
opts := volumes.CreateOpts{
Name: name,
Size: size,
}
if tags != nil {
opts.Metadata = *tags
}
vol, err := volumes.Create(sClient, opts).Extract()
if err != nil {
glog.Errorf("Failed to create a %d GB volume: %v", size, err)
return "", err
}
glog.Infof("Created volume %v", vol.ID)
return vol.ID, err
}
// GetDevicePath returns the path of an attached block storage volume, specified by its id.
func (os *OpenStack) GetDevicePath(diskId string) string {
files, _ := ioutil.ReadDir("/dev/disk/by-id/")
for _, f := range files {
if strings.Contains(f.Name(), "virtio-") {
devid_prefix := f.Name()[len("virtio-"):len(f.Name())]
if strings.Contains(diskId, devid_prefix) {
glog.V(4).Infof("Found disk attached as %q; full devicepath: %s\n", f.Name(), path.Join("/dev/disk/by-id/", f.Name()))
return path.Join("/dev/disk/by-id/", f.Name())
}
}
}
glog.Warningf("Failed to find device for the diskid: %q\n", diskId)
return ""
}
func (os *OpenStack) DeleteVolume(volumeName string) error {
sClient, err := openstack.NewBlockStorageV1(os.provider, gophercloud.EndpointOpts{
Region: os.region,
})
if err != nil || sClient == nil {
glog.Errorf("Unable to initialize cinder client for region: %s", os.region)
return err
}
err = volumes.Delete(sClient, volumeName).ExtractErr()
if err != nil {
glog.Errorf("Cannot delete volume %s: %v", volumeName, err)
}
return err
}
// Get device path of attached volume to the compute running kubelet
func (os *OpenStack) GetAttachmentDiskPath(instanceID string, diskName string) (string, error) {
disk, err := os.getVolume(diskName)
if err != nil {
return "", err
}
if len(disk.Attachments) > 0 && disk.Attachments[0]["server_id"] != nil {
if instanceID == disk.Attachments[0]["server_id"] {
// Attachment[0]["device"] points to the device path
// see http://developer.openstack.org/api-ref-blockstorage-v1.html
return disk.Attachments[0]["device"].(string), nil
} else {
errMsg := fmt.Sprintf("Disk %q is attached to a different compute: %q, should be detached before proceeding", diskName, disk.Attachments[0]["server_id"])
glog.Errorf(errMsg)
return "", errors.New(errMsg)
}
}
return "", fmt.Errorf("volume %s is not attached to %s", diskName, instanceID)
}
// query if a volume is attached to a compute instance
func (os *OpenStack) DiskIsAttached(diskName, instanceID string) (bool, error) {
disk, err := os.getVolume(diskName)
if err != nil {
return false, err
}
if len(disk.Attachments) > 0 && disk.Attachments[0]["server_id"] != nil && instanceID == disk.Attachments[0]["server_id"] {
return true, nil
}
return false, nil
}