forked from kubernetes/kubernetes
-
Notifications
You must be signed in to change notification settings - Fork 0
/
aws.go
4509 lines (3858 loc) · 152 KB
/
aws.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
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*
Copyright 2014 The Kubernetes Authors.
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 aws
import (
"context"
"errors"
"fmt"
"io"
"net"
"path"
"strconv"
"strings"
"sync"
"time"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/awserr"
"github.com/aws/aws-sdk-go/aws/credentials"
"github.com/aws/aws-sdk-go/aws/credentials/ec2rolecreds"
"github.com/aws/aws-sdk-go/aws/credentials/stscreds"
"github.com/aws/aws-sdk-go/aws/ec2metadata"
"github.com/aws/aws-sdk-go/aws/endpoints"
"github.com/aws/aws-sdk-go/aws/request"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/autoscaling"
"github.com/aws/aws-sdk-go/service/ec2"
"github.com/aws/aws-sdk-go/service/elb"
"github.com/aws/aws-sdk-go/service/elbv2"
"github.com/aws/aws-sdk-go/service/kms"
"github.com/aws/aws-sdk-go/service/sts"
"gopkg.in/gcfg.v1"
"k8s.io/klog"
"k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/resource"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/types"
"k8s.io/apimachinery/pkg/util/sets"
"k8s.io/apimachinery/pkg/util/wait"
clientset "k8s.io/client-go/kubernetes"
"k8s.io/client-go/kubernetes/scheme"
v1core "k8s.io/client-go/kubernetes/typed/core/v1"
"k8s.io/client-go/pkg/version"
"k8s.io/client-go/tools/record"
cloudprovider "k8s.io/cloud-provider"
nodehelpers "k8s.io/cloud-provider/node/helpers"
servicehelpers "k8s.io/cloud-provider/service/helpers"
"k8s.io/kubernetes/pkg/volume"
volumeutil "k8s.io/kubernetes/pkg/volume/util"
)
// NLBHealthCheckRuleDescription is the comment used on a security group rule to
// indicate that it is used for health checks
const NLBHealthCheckRuleDescription = "kubernetes.io/rule/nlb/health"
// NLBClientRuleDescription is the comment used on a security group rule to
// indicate that it is used for client traffic
const NLBClientRuleDescription = "kubernetes.io/rule/nlb/client"
// NLBMtuDiscoveryRuleDescription is the comment used on a security group rule
// to indicate that it is used for mtu discovery
const NLBMtuDiscoveryRuleDescription = "kubernetes.io/rule/nlb/mtu"
// ProviderName is the name of this cloud provider.
const ProviderName = "aws"
// TagNameKubernetesService is the tag name we use to differentiate multiple
// services. Used currently for ELBs only.
const TagNameKubernetesService = "kubernetes.io/service-name"
// TagNameSubnetInternalELB is the tag name used on a subnet to designate that
// it should be used for internal ELBs
const TagNameSubnetInternalELB = "kubernetes.io/role/internal-elb"
// TagNameSubnetPublicELB is the tag name used on a subnet to designate that
// it should be used for internet ELBs
const TagNameSubnetPublicELB = "kubernetes.io/role/elb"
// ServiceAnnotationLoadBalancerType is the annotation used on the service
// to indicate what type of Load Balancer we want. Right now, the only accepted
// value is "nlb"
const ServiceAnnotationLoadBalancerType = "service.beta.kubernetes.io/aws-load-balancer-type"
// ServiceAnnotationLoadBalancerInternal is the annotation used on the service
// to indicate that we want an internal ELB.
const ServiceAnnotationLoadBalancerInternal = "service.beta.kubernetes.io/aws-load-balancer-internal"
// ServiceAnnotationLoadBalancerProxyProtocol is the annotation used on the
// service to enable the proxy protocol on an ELB. Right now we only accept the
// value "*" which means enable the proxy protocol on all ELB backends. In the
// future we could adjust this to allow setting the proxy protocol only on
// certain backends.
const ServiceAnnotationLoadBalancerProxyProtocol = "service.beta.kubernetes.io/aws-load-balancer-proxy-protocol"
// ServiceAnnotationLoadBalancerAccessLogEmitInterval is the annotation used to
// specify access log emit interval.
const ServiceAnnotationLoadBalancerAccessLogEmitInterval = "service.beta.kubernetes.io/aws-load-balancer-access-log-emit-interval"
// ServiceAnnotationLoadBalancerAccessLogEnabled is the annotation used on the
// service to enable or disable access logs.
const ServiceAnnotationLoadBalancerAccessLogEnabled = "service.beta.kubernetes.io/aws-load-balancer-access-log-enabled"
// ServiceAnnotationLoadBalancerAccessLogS3BucketName is the annotation used to
// specify access log s3 bucket name.
const ServiceAnnotationLoadBalancerAccessLogS3BucketName = "service.beta.kubernetes.io/aws-load-balancer-access-log-s3-bucket-name"
// ServiceAnnotationLoadBalancerAccessLogS3BucketPrefix is the annotation used
// to specify access log s3 bucket prefix.
const ServiceAnnotationLoadBalancerAccessLogS3BucketPrefix = "service.beta.kubernetes.io/aws-load-balancer-access-log-s3-bucket-prefix"
// ServiceAnnotationLoadBalancerConnectionDrainingEnabled is the annnotation
// used on the service to enable or disable connection draining.
const ServiceAnnotationLoadBalancerConnectionDrainingEnabled = "service.beta.kubernetes.io/aws-load-balancer-connection-draining-enabled"
// ServiceAnnotationLoadBalancerConnectionDrainingTimeout is the annotation
// used on the service to specify a connection draining timeout.
const ServiceAnnotationLoadBalancerConnectionDrainingTimeout = "service.beta.kubernetes.io/aws-load-balancer-connection-draining-timeout"
// ServiceAnnotationLoadBalancerConnectionIdleTimeout is the annotation used
// on the service to specify the idle connection timeout.
const ServiceAnnotationLoadBalancerConnectionIdleTimeout = "service.beta.kubernetes.io/aws-load-balancer-connection-idle-timeout"
// ServiceAnnotationLoadBalancerCrossZoneLoadBalancingEnabled is the annotation
// used on the service to enable or disable cross-zone load balancing.
const ServiceAnnotationLoadBalancerCrossZoneLoadBalancingEnabled = "service.beta.kubernetes.io/aws-load-balancer-cross-zone-load-balancing-enabled"
// ServiceAnnotationLoadBalancerExtraSecurityGroups is the annotation used
// on the service to specify additional security groups to be added to ELB created
const ServiceAnnotationLoadBalancerExtraSecurityGroups = "service.beta.kubernetes.io/aws-load-balancer-extra-security-groups"
// ServiceAnnotationLoadBalancerSecurityGroups is the annotation used
// on the service to specify the security groups to be added to ELB created. Differently from the annotation
// "service.beta.kubernetes.io/aws-load-balancer-extra-security-groups", this replaces all other security groups previously assigned to the ELB.
const ServiceAnnotationLoadBalancerSecurityGroups = "service.beta.kubernetes.io/aws-load-balancer-security-groups"
// ServiceAnnotationLoadBalancerCertificate is the annotation used on the
// service to request a secure listener. Value is a valid certificate ARN.
// For more, see http://docs.aws.amazon.com/ElasticLoadBalancing/latest/DeveloperGuide/elb-listener-config.html
// CertARN is an IAM or CM certificate ARN, e.g. arn:aws:acm:us-east-1:123456789012:certificate/12345678-1234-1234-1234-123456789012
const ServiceAnnotationLoadBalancerCertificate = "service.beta.kubernetes.io/aws-load-balancer-ssl-cert"
// ServiceAnnotationLoadBalancerSSLPorts is the annotation used on the service
// to specify a comma-separated list of ports that will use SSL/HTTPS
// listeners. Defaults to '*' (all).
const ServiceAnnotationLoadBalancerSSLPorts = "service.beta.kubernetes.io/aws-load-balancer-ssl-ports"
// ServiceAnnotationLoadBalancerSSLNegotiationPolicy is the annotation used on
// the service to specify a SSL negotiation settings for the HTTPS/SSL listeners
// of your load balancer. Defaults to AWS's default
const ServiceAnnotationLoadBalancerSSLNegotiationPolicy = "service.beta.kubernetes.io/aws-load-balancer-ssl-negotiation-policy"
// ServiceAnnotationLoadBalancerBEProtocol is the annotation used on the service
// to specify the protocol spoken by the backend (pod) behind a listener.
// If `http` (default) or `https`, an HTTPS listener that terminates the
// connection and parses headers is created.
// If set to `ssl` or `tcp`, a "raw" SSL listener is used.
// If set to `http` and `aws-load-balancer-ssl-cert` is not used then
// a HTTP listener is used.
const ServiceAnnotationLoadBalancerBEProtocol = "service.beta.kubernetes.io/aws-load-balancer-backend-protocol"
// ServiceAnnotationLoadBalancerAdditionalTags is the annotation used on the service
// to specify a comma-separated list of key-value pairs which will be recorded as
// additional tags in the ELB.
// For example: "Key1=Val1,Key2=Val2,KeyNoVal1=,KeyNoVal2"
const ServiceAnnotationLoadBalancerAdditionalTags = "service.beta.kubernetes.io/aws-load-balancer-additional-resource-tags"
// ServiceAnnotationLoadBalancerHCHealthyThreshold is the annotation used on
// the service to specify the number of successive successful health checks
// required for a backend to be considered healthy for traffic.
const ServiceAnnotationLoadBalancerHCHealthyThreshold = "service.beta.kubernetes.io/aws-load-balancer-healthcheck-healthy-threshold"
// ServiceAnnotationLoadBalancerHCUnhealthyThreshold is the annotation used
// on the service to specify the number of unsuccessful health checks
// required for a backend to be considered unhealthy for traffic
const ServiceAnnotationLoadBalancerHCUnhealthyThreshold = "service.beta.kubernetes.io/aws-load-balancer-healthcheck-unhealthy-threshold"
// ServiceAnnotationLoadBalancerHCTimeout is the annotation used on the
// service to specify, in seconds, how long to wait before marking a health
// check as failed.
const ServiceAnnotationLoadBalancerHCTimeout = "service.beta.kubernetes.io/aws-load-balancer-healthcheck-timeout"
// ServiceAnnotationLoadBalancerHCInterval is the annotation used on the
// service to specify, in seconds, the interval between health checks.
const ServiceAnnotationLoadBalancerHCInterval = "service.beta.kubernetes.io/aws-load-balancer-healthcheck-interval"
// Event key when a volume is stuck on attaching state when being attached to a volume
const volumeAttachmentStuck = "VolumeAttachmentStuck"
// Indicates that a node has volumes stuck in attaching state and hence it is not fit for scheduling more pods
const nodeWithImpairedVolumes = "NodeWithImpairedVolumes"
const (
// volumeAttachmentConsecutiveErrorLimit is the number of consecutive errors we will ignore when waiting for a volume to attach/detach
volumeAttachmentStatusConsecutiveErrorLimit = 10
// most attach/detach operations on AWS finish within 1-4 seconds
// By using 1 second starting interval with a backoff of 1.8
// we get - [1, 1.8, 3.24, 5.832000000000001, 10.4976]
// in total we wait for 2601 seconds
volumeAttachmentStatusInitialDelay = 1 * time.Second
volumeAttachmentStatusFactor = 1.8
volumeAttachmentStatusSteps = 13
// createTag* is configuration of exponential backoff for CreateTag call. We
// retry mainly because if we create an object, we cannot tag it until it is
// "fully created" (eventual consistency). Starting with 1 second, doubling
// it every step and taking 9 steps results in 255 second total waiting
// time.
createTagInitialDelay = 1 * time.Second
createTagFactor = 2.0
createTagSteps = 9
// encryptedCheck* is configuration of poll for created volume to check
// it has not been silently removed by AWS.
// On a random AWS account (shared among several developers) it took 4s on
// average.
encryptedCheckInterval = 1 * time.Second
encryptedCheckTimeout = 30 * time.Second
// Number of node names that can be added to a filter. The AWS limit is 200
// but we are using a lower limit on purpose
filterNodeLimit = 150
)
// awsTagNameMasterRoles is a set of well-known AWS tag names that indicate the instance is a master
// The major consequence is that it is then not considered for AWS zone discovery for dynamic volume creation.
var awsTagNameMasterRoles = sets.NewString("kubernetes.io/role/master", "k8s.io/role/master")
// Maps from backend protocol to ELB protocol
var backendProtocolMapping = map[string]string{
"https": "https",
"http": "https",
"ssl": "ssl",
"tcp": "ssl",
}
// MaxReadThenCreateRetries sets the maximum number of attempts we will make when
// we read to see if something exists and then try to create it if we didn't find it.
// This can fail once in a consistent system if done in parallel
// In an eventually consistent system, it could fail unboundedly
const MaxReadThenCreateRetries = 30
// DefaultVolumeType specifies which storage to use for newly created Volumes
// TODO: Remove when user/admin can configure volume types and thus we don't
// need hardcoded defaults.
const DefaultVolumeType = "gp2"
// Used to call recognizeWellKnownRegions just once
var once sync.Once
// Services is an abstraction over AWS, to allow mocking/other implementations
type Services interface {
Compute(region string) (EC2, error)
LoadBalancing(region string) (ELB, error)
LoadBalancingV2(region string) (ELBV2, error)
Autoscaling(region string) (ASG, error)
Metadata() (EC2Metadata, error)
KeyManagement(region string) (KMS, error)
}
// EC2 is an abstraction over AWS', to allow mocking/other implementations
// Note that the DescribeX functions return a list, so callers don't need to deal with paging
// TODO: Should we rename this to AWS (EBS & ELB are not technically part of EC2)
type EC2 interface {
// Query EC2 for instances matching the filter
DescribeInstances(request *ec2.DescribeInstancesInput) ([]*ec2.Instance, error)
// Attach a volume to an instance
AttachVolume(*ec2.AttachVolumeInput) (*ec2.VolumeAttachment, error)
// Detach a volume from an instance it is attached to
DetachVolume(request *ec2.DetachVolumeInput) (resp *ec2.VolumeAttachment, err error)
// Lists volumes
DescribeVolumes(request *ec2.DescribeVolumesInput) ([]*ec2.Volume, error)
// Create an EBS volume
CreateVolume(request *ec2.CreateVolumeInput) (resp *ec2.Volume, err error)
// Delete an EBS volume
DeleteVolume(*ec2.DeleteVolumeInput) (*ec2.DeleteVolumeOutput, error)
ModifyVolume(*ec2.ModifyVolumeInput) (*ec2.ModifyVolumeOutput, error)
DescribeVolumeModifications(*ec2.DescribeVolumesModificationsInput) ([]*ec2.VolumeModification, error)
DescribeSecurityGroups(request *ec2.DescribeSecurityGroupsInput) ([]*ec2.SecurityGroup, error)
CreateSecurityGroup(*ec2.CreateSecurityGroupInput) (*ec2.CreateSecurityGroupOutput, error)
DeleteSecurityGroup(request *ec2.DeleteSecurityGroupInput) (*ec2.DeleteSecurityGroupOutput, error)
AuthorizeSecurityGroupIngress(*ec2.AuthorizeSecurityGroupIngressInput) (*ec2.AuthorizeSecurityGroupIngressOutput, error)
RevokeSecurityGroupIngress(*ec2.RevokeSecurityGroupIngressInput) (*ec2.RevokeSecurityGroupIngressOutput, error)
DescribeSubnets(*ec2.DescribeSubnetsInput) ([]*ec2.Subnet, error)
CreateTags(*ec2.CreateTagsInput) (*ec2.CreateTagsOutput, error)
DescribeRouteTables(request *ec2.DescribeRouteTablesInput) ([]*ec2.RouteTable, error)
CreateRoute(request *ec2.CreateRouteInput) (*ec2.CreateRouteOutput, error)
DeleteRoute(request *ec2.DeleteRouteInput) (*ec2.DeleteRouteOutput, error)
ModifyInstanceAttribute(request *ec2.ModifyInstanceAttributeInput) (*ec2.ModifyInstanceAttributeOutput, error)
DescribeVpcs(input *ec2.DescribeVpcsInput) (*ec2.DescribeVpcsOutput, error)
}
// ELB is a simple pass-through of AWS' ELB client interface, which allows for testing
type ELB interface {
CreateLoadBalancer(*elb.CreateLoadBalancerInput) (*elb.CreateLoadBalancerOutput, error)
DeleteLoadBalancer(*elb.DeleteLoadBalancerInput) (*elb.DeleteLoadBalancerOutput, error)
DescribeLoadBalancers(*elb.DescribeLoadBalancersInput) (*elb.DescribeLoadBalancersOutput, error)
AddTags(*elb.AddTagsInput) (*elb.AddTagsOutput, error)
RegisterInstancesWithLoadBalancer(*elb.RegisterInstancesWithLoadBalancerInput) (*elb.RegisterInstancesWithLoadBalancerOutput, error)
DeregisterInstancesFromLoadBalancer(*elb.DeregisterInstancesFromLoadBalancerInput) (*elb.DeregisterInstancesFromLoadBalancerOutput, error)
CreateLoadBalancerPolicy(*elb.CreateLoadBalancerPolicyInput) (*elb.CreateLoadBalancerPolicyOutput, error)
SetLoadBalancerPoliciesForBackendServer(*elb.SetLoadBalancerPoliciesForBackendServerInput) (*elb.SetLoadBalancerPoliciesForBackendServerOutput, error)
SetLoadBalancerPoliciesOfListener(input *elb.SetLoadBalancerPoliciesOfListenerInput) (*elb.SetLoadBalancerPoliciesOfListenerOutput, error)
DescribeLoadBalancerPolicies(input *elb.DescribeLoadBalancerPoliciesInput) (*elb.DescribeLoadBalancerPoliciesOutput, error)
DetachLoadBalancerFromSubnets(*elb.DetachLoadBalancerFromSubnetsInput) (*elb.DetachLoadBalancerFromSubnetsOutput, error)
AttachLoadBalancerToSubnets(*elb.AttachLoadBalancerToSubnetsInput) (*elb.AttachLoadBalancerToSubnetsOutput, error)
CreateLoadBalancerListeners(*elb.CreateLoadBalancerListenersInput) (*elb.CreateLoadBalancerListenersOutput, error)
DeleteLoadBalancerListeners(*elb.DeleteLoadBalancerListenersInput) (*elb.DeleteLoadBalancerListenersOutput, error)
ApplySecurityGroupsToLoadBalancer(*elb.ApplySecurityGroupsToLoadBalancerInput) (*elb.ApplySecurityGroupsToLoadBalancerOutput, error)
ConfigureHealthCheck(*elb.ConfigureHealthCheckInput) (*elb.ConfigureHealthCheckOutput, error)
DescribeLoadBalancerAttributes(*elb.DescribeLoadBalancerAttributesInput) (*elb.DescribeLoadBalancerAttributesOutput, error)
ModifyLoadBalancerAttributes(*elb.ModifyLoadBalancerAttributesInput) (*elb.ModifyLoadBalancerAttributesOutput, error)
}
// ELBV2 is a simple pass-through of AWS' ELBV2 client interface, which allows for testing
type ELBV2 interface {
AddTags(input *elbv2.AddTagsInput) (*elbv2.AddTagsOutput, error)
CreateLoadBalancer(*elbv2.CreateLoadBalancerInput) (*elbv2.CreateLoadBalancerOutput, error)
DescribeLoadBalancers(*elbv2.DescribeLoadBalancersInput) (*elbv2.DescribeLoadBalancersOutput, error)
DeleteLoadBalancer(*elbv2.DeleteLoadBalancerInput) (*elbv2.DeleteLoadBalancerOutput, error)
ModifyLoadBalancerAttributes(*elbv2.ModifyLoadBalancerAttributesInput) (*elbv2.ModifyLoadBalancerAttributesOutput, error)
DescribeLoadBalancerAttributes(*elbv2.DescribeLoadBalancerAttributesInput) (*elbv2.DescribeLoadBalancerAttributesOutput, error)
CreateTargetGroup(*elbv2.CreateTargetGroupInput) (*elbv2.CreateTargetGroupOutput, error)
DescribeTargetGroups(*elbv2.DescribeTargetGroupsInput) (*elbv2.DescribeTargetGroupsOutput, error)
ModifyTargetGroup(*elbv2.ModifyTargetGroupInput) (*elbv2.ModifyTargetGroupOutput, error)
DeleteTargetGroup(*elbv2.DeleteTargetGroupInput) (*elbv2.DeleteTargetGroupOutput, error)
DescribeTargetHealth(input *elbv2.DescribeTargetHealthInput) (*elbv2.DescribeTargetHealthOutput, error)
DescribeTargetGroupAttributes(*elbv2.DescribeTargetGroupAttributesInput) (*elbv2.DescribeTargetGroupAttributesOutput, error)
ModifyTargetGroupAttributes(*elbv2.ModifyTargetGroupAttributesInput) (*elbv2.ModifyTargetGroupAttributesOutput, error)
RegisterTargets(*elbv2.RegisterTargetsInput) (*elbv2.RegisterTargetsOutput, error)
DeregisterTargets(*elbv2.DeregisterTargetsInput) (*elbv2.DeregisterTargetsOutput, error)
CreateListener(*elbv2.CreateListenerInput) (*elbv2.CreateListenerOutput, error)
DescribeListeners(*elbv2.DescribeListenersInput) (*elbv2.DescribeListenersOutput, error)
DeleteListener(*elbv2.DeleteListenerInput) (*elbv2.DeleteListenerOutput, error)
ModifyListener(*elbv2.ModifyListenerInput) (*elbv2.ModifyListenerOutput, error)
WaitUntilLoadBalancersDeleted(*elbv2.DescribeLoadBalancersInput) error
}
// ASG is a simple pass-through of the Autoscaling client interface, which
// allows for testing.
type ASG interface {
UpdateAutoScalingGroup(*autoscaling.UpdateAutoScalingGroupInput) (*autoscaling.UpdateAutoScalingGroupOutput, error)
DescribeAutoScalingGroups(*autoscaling.DescribeAutoScalingGroupsInput) (*autoscaling.DescribeAutoScalingGroupsOutput, error)
}
// KMS is a simple pass-through of the Key Management Service client interface,
// which allows for testing.
type KMS interface {
DescribeKey(*kms.DescribeKeyInput) (*kms.DescribeKeyOutput, error)
}
// EC2Metadata is an abstraction over the AWS metadata service.
type EC2Metadata interface {
// Query the EC2 metadata service (used to discover instance-id etc)
GetMetadata(path string) (string, error)
}
// AWS volume types
const (
// Provisioned IOPS SSD
VolumeTypeIO1 = "io1"
// General Purpose SSD
VolumeTypeGP2 = "gp2"
// Cold HDD (sc1)
VolumeTypeSC1 = "sc1"
// Throughput Optimized HDD
VolumeTypeST1 = "st1"
)
// AWS provisioning limits.
// Source: http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/EBSVolumeTypes.html
const (
MinTotalIOPS = 100
MaxTotalIOPS = 20000
)
// VolumeOptions specifies capacity and tags for a volume.
type VolumeOptions struct {
CapacityGB int
Tags map[string]string
VolumeType string
AvailabilityZone string
// IOPSPerGB x CapacityGB will give total IOPS of the volume to create.
// Calculated total IOPS will be capped at MaxTotalIOPS.
IOPSPerGB int
Encrypted bool
// fully qualified resource name to the key to use for encryption.
// example: arn:aws:kms:us-east-1:012345678910:key/abcd1234-a123-456a-a12b-a123b4cd56ef
KmsKeyID string
}
// Volumes is an interface for managing cloud-provisioned volumes
// TODO: Allow other clouds to implement this
type Volumes interface {
// Attach the disk to the node with the specified NodeName
// nodeName can be empty to mean "the instance on which we are running"
// Returns the device (e.g. /dev/xvdf) where we attached the volume
AttachDisk(diskName KubernetesVolumeID, nodeName types.NodeName) (string, error)
// Detach the disk from the node with the specified NodeName
// nodeName can be empty to mean "the instance on which we are running"
// Returns the device where the volume was attached
DetachDisk(diskName KubernetesVolumeID, nodeName types.NodeName) (string, error)
// Create a volume with the specified options
CreateDisk(volumeOptions *VolumeOptions) (volumeName KubernetesVolumeID, err error)
// Delete the specified volume
// Returns true iff the volume was deleted
// If the was not found, returns (false, nil)
DeleteDisk(volumeName KubernetesVolumeID) (bool, error)
// Get labels to apply to volume on creation
GetVolumeLabels(volumeName KubernetesVolumeID) (map[string]string, error)
// Get volume's disk path from volume name
// return the device path where the volume is attached
GetDiskPath(volumeName KubernetesVolumeID) (string, error)
// Check if the volume is already attached to the node with the specified NodeName
DiskIsAttached(diskName KubernetesVolumeID, nodeName types.NodeName) (bool, error)
// Check if disks specified in argument map are still attached to their respective nodes.
DisksAreAttached(map[types.NodeName][]KubernetesVolumeID) (map[types.NodeName]map[KubernetesVolumeID]bool, error)
// Expand the disk to new size
ResizeDisk(diskName KubernetesVolumeID, oldSize resource.Quantity, newSize resource.Quantity) (resource.Quantity, error)
}
// InstanceGroups is an interface for managing cloud-managed instance groups / autoscaling instance groups
// TODO: Allow other clouds to implement this
type InstanceGroups interface {
// Set the size to the fixed size
ResizeInstanceGroup(instanceGroupName string, size int) error
// Queries the cloud provider for information about the specified instance group
DescribeInstanceGroup(instanceGroupName string) (InstanceGroupInfo, error)
}
// InstanceGroupInfo is returned by InstanceGroups.Describe, and exposes information about the group.
type InstanceGroupInfo interface {
// The number of instances currently running under control of this group
CurrentSize() (int, error)
}
var _ cloudprovider.Interface = (*Cloud)(nil)
var _ cloudprovider.Instances = (*Cloud)(nil)
var _ cloudprovider.LoadBalancer = (*Cloud)(nil)
var _ cloudprovider.Routes = (*Cloud)(nil)
var _ cloudprovider.Zones = (*Cloud)(nil)
var _ cloudprovider.PVLabeler = (*Cloud)(nil)
// Cloud is an implementation of Interface, LoadBalancer and Instances for Amazon Web Services.
type Cloud struct {
ec2 EC2
elb ELB
elbv2 ELBV2
asg ASG
kms KMS
metadata EC2Metadata
cfg *CloudConfig
region string
vpcID string
tagging awsTagging
// The AWS instance that we are running on
// Note that we cache some state in awsInstance (mountpoints), so we must preserve the instance
selfAWSInstance *awsInstance
instanceCache instanceCache
clientBuilder cloudprovider.ControllerClientBuilder
kubeClient clientset.Interface
eventBroadcaster record.EventBroadcaster
eventRecorder record.EventRecorder
// We keep an active list of devices we have assigned but not yet
// attached, to avoid a race condition where we assign a device mapping
// and then get a second request before we attach the volume
attachingMutex sync.Mutex
attaching map[types.NodeName]map[mountDevice]EBSVolumeID
// state of our device allocator for each node
deviceAllocators map[types.NodeName]DeviceAllocator
}
var _ Volumes = &Cloud{}
// CloudConfig wraps the settings for the AWS cloud provider.
type CloudConfig struct {
Global struct {
// TODO: Is there any use for this? We can get it from the instance metadata service
// Maybe if we're not running on AWS, e.g. bootstrap; for now it is not very useful
Zone string
// The AWS VPC flag enables the possibility to run the master components
// on a different aws account, on a different cloud provider or on-premises.
// If the flag is set also the KubernetesClusterTag must be provided
VPC string
// SubnetID enables using a specific subnet to use for ELB's
SubnetID string
// RouteTableID enables using a specific RouteTable
RouteTableID string
// RoleARN is the IAM role to assume when interaction with AWS APIs.
RoleARN string
// KubernetesClusterTag is the legacy cluster id we'll use to identify our cluster resources
KubernetesClusterTag string
// KubernetesClusterID is the cluster id we'll use to identify our cluster resources
KubernetesClusterID string
//The aws provider creates an inbound rule per load balancer on the node security
//group. However, this can run into the AWS security group rule limit of 50 if
//many LoadBalancers are created.
//
//This flag disables the automatic ingress creation. It requires that the user
//has setup a rule that allows inbound traffic on kubelet ports from the
//local VPC subnet (so load balancers can access it). E.g. 10.82.0.0/16 30000-32000.
DisableSecurityGroupIngress bool
//AWS has a hard limit of 500 security groups. For large clusters creating a security group for each ELB
//can cause the max number of security groups to be reached. If this is set instead of creating a new
//Security group for each ELB this security group will be used instead.
ElbSecurityGroup string
//During the instantiation of an new AWS cloud provider, the detected region
//is validated against a known set of regions.
//
//In a non-standard, AWS like environment (e.g. Eucalyptus), this check may
//be undesirable. Setting this to true will disable the check and provide
//a warning that the check was skipped. Please note that this is an
//experimental feature and work-in-progress for the moment. If you find
//yourself in an non-AWS cloud and open an issue, please indicate that in the
//issue body.
DisableStrictZoneCheck bool
}
// [ServiceOverride "1"]
// Service = s3
// Region = region1
// URL = https://s3.foo.bar
// SigningRegion = signing_region
// SigningMethod = signing_method
//
// [ServiceOverride "2"]
// Service = ec2
// Region = region2
// URL = https://ec2.foo.bar
// SigningRegion = signing_region
// SigningMethod = signing_method
ServiceOverride map[string]*struct {
Service string
Region string
URL string
SigningRegion string
SigningMethod string
SigningName string
}
}
func (cfg *CloudConfig) validateOverrides() error {
if len(cfg.ServiceOverride) == 0 {
return nil
}
set := make(map[string]bool)
for onum, ovrd := range cfg.ServiceOverride {
// Note: gcfg does not space trim, so we have to when comparing to empty string ""
name := strings.TrimSpace(ovrd.Service)
if name == "" {
return fmt.Errorf("service name is missing [Service is \"\"] in override %s", onum)
}
// insure the map service name is space trimmed
ovrd.Service = name
region := strings.TrimSpace(ovrd.Region)
if region == "" {
return fmt.Errorf("service region is missing [Region is \"\"] in override %s", onum)
}
// insure the map region is space trimmed
ovrd.Region = region
url := strings.TrimSpace(ovrd.URL)
if url == "" {
return fmt.Errorf("url is missing [URL is \"\"] in override %s", onum)
}
signingRegion := strings.TrimSpace(ovrd.SigningRegion)
if signingRegion == "" {
return fmt.Errorf("signingRegion is missing [SigningRegion is \"\"] in override %s", onum)
}
signature := name + "_" + region
if set[signature] {
return fmt.Errorf("duplicate entry found for service override [%s] (%s in %s)", onum, name, region)
}
set[signature] = true
}
return nil
}
func (cfg *CloudConfig) getResolver() endpoints.ResolverFunc {
defaultResolver := endpoints.DefaultResolver()
defaultResolverFn := func(service, region string,
optFns ...func(*endpoints.Options)) (endpoints.ResolvedEndpoint, error) {
return defaultResolver.EndpointFor(service, region, optFns...)
}
if len(cfg.ServiceOverride) == 0 {
return defaultResolverFn
}
return func(service, region string,
optFns ...func(*endpoints.Options)) (endpoints.ResolvedEndpoint, error) {
for _, override := range cfg.ServiceOverride {
if override.Service == service && override.Region == region {
return endpoints.ResolvedEndpoint{
URL: override.URL,
SigningRegion: override.SigningRegion,
SigningMethod: override.SigningMethod,
SigningName: override.SigningName,
}, nil
}
}
return defaultResolver.EndpointFor(service, region, optFns...)
}
}
// awsSdkEC2 is an implementation of the EC2 interface, backed by aws-sdk-go
type awsSdkEC2 struct {
ec2 *ec2.EC2
}
// Interface to make the CloudConfig immutable for awsSDKProvider
type awsCloudConfigProvider interface {
getResolver() endpoints.ResolverFunc
}
type awsSDKProvider struct {
creds *credentials.Credentials
cfg awsCloudConfigProvider
mutex sync.Mutex
regionDelayers map[string]*CrossRequestRetryDelay
}
func newAWSSDKProvider(creds *credentials.Credentials, cfg *CloudConfig) *awsSDKProvider {
return &awsSDKProvider{
creds: creds,
cfg: cfg,
regionDelayers: make(map[string]*CrossRequestRetryDelay),
}
}
func (p *awsSDKProvider) addHandlers(regionName string, h *request.Handlers) {
h.Build.PushFrontNamed(request.NamedHandler{
Name: "k8s/user-agent",
Fn: request.MakeAddToUserAgentHandler("kubernetes", version.Get().String()),
})
h.Sign.PushFrontNamed(request.NamedHandler{
Name: "k8s/logger",
Fn: awsHandlerLogger,
})
delayer := p.getCrossRequestRetryDelay(regionName)
if delayer != nil {
h.Sign.PushFrontNamed(request.NamedHandler{
Name: "k8s/delay-presign",
Fn: delayer.BeforeSign,
})
h.AfterRetry.PushFrontNamed(request.NamedHandler{
Name: "k8s/delay-afterretry",
Fn: delayer.AfterRetry,
})
}
p.addAPILoggingHandlers(h)
}
func (p *awsSDKProvider) addAPILoggingHandlers(h *request.Handlers) {
h.Send.PushBackNamed(request.NamedHandler{
Name: "k8s/api-request",
Fn: awsSendHandlerLogger,
})
h.ValidateResponse.PushFrontNamed(request.NamedHandler{
Name: "k8s/api-validate-response",
Fn: awsValidateResponseHandlerLogger,
})
}
// Get a CrossRequestRetryDelay, scoped to the region, not to the request.
// This means that when we hit a limit on a call, we will delay _all_ calls to the API.
// We do this to protect the AWS account from becoming overloaded and effectively locked.
// We also log when we hit request limits.
// Note that this delays the current goroutine; this is bad behaviour and will
// likely cause k8s to become slow or unresponsive for cloud operations.
// However, this throttle is intended only as a last resort. When we observe
// this throttling, we need to address the root cause (e.g. add a delay to a
// controller retry loop)
func (p *awsSDKProvider) getCrossRequestRetryDelay(regionName string) *CrossRequestRetryDelay {
p.mutex.Lock()
defer p.mutex.Unlock()
delayer, found := p.regionDelayers[regionName]
if !found {
delayer = NewCrossRequestRetryDelay()
p.regionDelayers[regionName] = delayer
}
return delayer
}
func (p *awsSDKProvider) Compute(regionName string) (EC2, error) {
awsConfig := &aws.Config{
Region: ®ionName,
Credentials: p.creds,
}
awsConfig = awsConfig.WithCredentialsChainVerboseErrors(true).
WithEndpointResolver(p.cfg.getResolver())
sess, err := session.NewSession(awsConfig)
if err != nil {
return nil, fmt.Errorf("unable to initialize AWS session: %v", err)
}
service := ec2.New(sess)
p.addHandlers(regionName, &service.Handlers)
ec2 := &awsSdkEC2{
ec2: service,
}
return ec2, nil
}
func (p *awsSDKProvider) LoadBalancing(regionName string) (ELB, error) {
awsConfig := &aws.Config{
Region: ®ionName,
Credentials: p.creds,
}
awsConfig = awsConfig.WithCredentialsChainVerboseErrors(true).
WithEndpointResolver(p.cfg.getResolver())
sess, err := session.NewSession(awsConfig)
if err != nil {
return nil, fmt.Errorf("unable to initialize AWS session: %v", err)
}
elbClient := elb.New(sess)
p.addHandlers(regionName, &elbClient.Handlers)
return elbClient, nil
}
func (p *awsSDKProvider) LoadBalancingV2(regionName string) (ELBV2, error) {
awsConfig := &aws.Config{
Region: ®ionName,
Credentials: p.creds,
}
awsConfig = awsConfig.WithCredentialsChainVerboseErrors(true).
WithEndpointResolver(p.cfg.getResolver())
sess, err := session.NewSession(awsConfig)
if err != nil {
return nil, fmt.Errorf("unable to initialize AWS session: %v", err)
}
elbClient := elbv2.New(sess)
p.addHandlers(regionName, &elbClient.Handlers)
return elbClient, nil
}
func (p *awsSDKProvider) Autoscaling(regionName string) (ASG, error) {
awsConfig := &aws.Config{
Region: ®ionName,
Credentials: p.creds,
}
awsConfig = awsConfig.WithCredentialsChainVerboseErrors(true).
WithEndpointResolver(p.cfg.getResolver())
sess, err := session.NewSession(awsConfig)
if err != nil {
return nil, fmt.Errorf("unable to initialize AWS session: %v", err)
}
client := autoscaling.New(sess)
p.addHandlers(regionName, &client.Handlers)
return client, nil
}
func (p *awsSDKProvider) Metadata() (EC2Metadata, error) {
sess, err := session.NewSession(&aws.Config{
EndpointResolver: p.cfg.getResolver(),
})
if err != nil {
return nil, fmt.Errorf("unable to initialize AWS session: %v", err)
}
client := ec2metadata.New(sess)
p.addAPILoggingHandlers(&client.Handlers)
return client, nil
}
func (p *awsSDKProvider) KeyManagement(regionName string) (KMS, error) {
awsConfig := &aws.Config{
Region: ®ionName,
Credentials: p.creds,
}
awsConfig = awsConfig.WithCredentialsChainVerboseErrors(true).
WithEndpointResolver(p.cfg.getResolver())
sess, err := session.NewSession(awsConfig)
if err != nil {
return nil, fmt.Errorf("unable to initialize AWS session: %v", err)
}
kmsClient := kms.New(sess)
p.addHandlers(regionName, &kmsClient.Handlers)
return kmsClient, nil
}
func newEc2Filter(name string, values ...string) *ec2.Filter {
filter := &ec2.Filter{
Name: aws.String(name),
}
for _, value := range values {
filter.Values = append(filter.Values, aws.String(value))
}
return filter
}
// AddSSHKeyToAllInstances is currently not implemented.
func (c *Cloud) AddSSHKeyToAllInstances(ctx context.Context, user string, keyData []byte) error {
return cloudprovider.NotImplemented
}
// CurrentNodeName returns the name of the current node
func (c *Cloud) CurrentNodeName(ctx context.Context, hostname string) (types.NodeName, error) {
return c.selfAWSInstance.nodeName, nil
}
// Implementation of EC2.Instances
func (s *awsSdkEC2) DescribeInstances(request *ec2.DescribeInstancesInput) ([]*ec2.Instance, error) {
// Instances are paged
results := []*ec2.Instance{}
var nextToken *string
requestTime := time.Now()
for {
response, err := s.ec2.DescribeInstances(request)
if err != nil {
recordAWSMetric("describe_instance", 0, err)
return nil, fmt.Errorf("error listing AWS instances: %q", err)
}
for _, reservation := range response.Reservations {
results = append(results, reservation.Instances...)
}
nextToken = response.NextToken
if aws.StringValue(nextToken) == "" {
break
}
request.NextToken = nextToken
}
timeTaken := time.Since(requestTime).Seconds()
recordAWSMetric("describe_instance", timeTaken, nil)
return results, nil
}
// Implements EC2.DescribeSecurityGroups
func (s *awsSdkEC2) DescribeSecurityGroups(request *ec2.DescribeSecurityGroupsInput) ([]*ec2.SecurityGroup, error) {
// Security groups are not paged
response, err := s.ec2.DescribeSecurityGroups(request)
if err != nil {
return nil, fmt.Errorf("error listing AWS security groups: %q", err)
}
return response.SecurityGroups, nil
}
func (s *awsSdkEC2) AttachVolume(request *ec2.AttachVolumeInput) (*ec2.VolumeAttachment, error) {
requestTime := time.Now()
resp, err := s.ec2.AttachVolume(request)
timeTaken := time.Since(requestTime).Seconds()
recordAWSMetric("attach_volume", timeTaken, err)
return resp, err
}
func (s *awsSdkEC2) DetachVolume(request *ec2.DetachVolumeInput) (*ec2.VolumeAttachment, error) {
requestTime := time.Now()
resp, err := s.ec2.DetachVolume(request)
timeTaken := time.Since(requestTime).Seconds()
recordAWSMetric("detach_volume", timeTaken, err)
return resp, err
}
func (s *awsSdkEC2) DescribeVolumes(request *ec2.DescribeVolumesInput) ([]*ec2.Volume, error) {
// Volumes are paged
results := []*ec2.Volume{}
var nextToken *string
requestTime := time.Now()
for {
response, err := s.ec2.DescribeVolumes(request)
if err != nil {
recordAWSMetric("describe_volume", 0, err)
return nil, err
}
results = append(results, response.Volumes...)
nextToken = response.NextToken
if aws.StringValue(nextToken) == "" {
break
}
request.NextToken = nextToken
}
timeTaken := time.Since(requestTime).Seconds()
recordAWSMetric("describe_volume", timeTaken, nil)
return results, nil
}
func (s *awsSdkEC2) CreateVolume(request *ec2.CreateVolumeInput) (*ec2.Volume, error) {
requestTime := time.Now()
resp, err := s.ec2.CreateVolume(request)
timeTaken := time.Since(requestTime).Seconds()
recordAWSMetric("create_volume", timeTaken, err)
return resp, err
}
func (s *awsSdkEC2) DeleteVolume(request *ec2.DeleteVolumeInput) (*ec2.DeleteVolumeOutput, error) {
requestTime := time.Now()
resp, err := s.ec2.DeleteVolume(request)
timeTaken := time.Since(requestTime).Seconds()
recordAWSMetric("delete_volume", timeTaken, err)
return resp, err
}
func (s *awsSdkEC2) ModifyVolume(request *ec2.ModifyVolumeInput) (*ec2.ModifyVolumeOutput, error) {
requestTime := time.Now()
resp, err := s.ec2.ModifyVolume(request)
timeTaken := time.Since(requestTime).Seconds()
recordAWSMetric("modify_volume", timeTaken, err)
return resp, err
}
func (s *awsSdkEC2) DescribeVolumeModifications(request *ec2.DescribeVolumesModificationsInput) ([]*ec2.VolumeModification, error) {
requestTime := time.Now()
results := []*ec2.VolumeModification{}
var nextToken *string
for {
resp, err := s.ec2.DescribeVolumesModifications(request)
if err != nil {
recordAWSMetric("describe_volume_modification", 0, err)
return nil, fmt.Errorf("error listing volume modifictions : %v", err)
}
results = append(results, resp.VolumesModifications...)
nextToken = resp.NextToken
if aws.StringValue(nextToken) == "" {
break
}
request.NextToken = nextToken
}
timeTaken := time.Since(requestTime).Seconds()
recordAWSMetric("describe_volume_modification", timeTaken, nil)
return results, nil
}