/
vpc.go
1315 lines (1213 loc) · 36.8 KB
/
vpc.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
package ec2
import (
"context"
"errors"
"fmt"
"strings"
"time"
awscfn "github.com/aws/aws-k8s-tester/pkg/aws/cloudformation"
"github.com/aws/aws-k8s-tester/version"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/awserr"
"github.com/aws/aws-sdk-go/service/cloudformation"
"github.com/aws/aws-sdk-go/service/ec2"
"github.com/aws/aws-sdk-go/service/elbv2"
"go.uber.org/zap"
)
/*
ref.
https://docs.aws.amazon.com/vpc/latest/userguide/VPC_Internet_Gateway.html#vpc-igw-internet-access
https://docs.aws.amazon.com/vpc/latest/userguide/vpc-nat-gateway.html
https://amazon-eks.s3.us-west-2.amazonaws.com/cloudformation/2019-11-15/amazon-eks-vpc-private-subnets.yaml
Fargate for EKS does not support public subnet
Customer ENIs attached to Fargate task is not given a Public IP/EIP
Fargate node is not assigned a PublicIP/EIP
EC2::InternetGateway
EC2::InternetGateway allows "inbound" and "outbound" traffic from/to the internet
EC2::InternetGateway does NAT (network address translation) between two IP addresses:
- Public IP/EIP assigned to the EC2 instance
- Private IP assigned to the EC2 instance
EC2::NatGateway
EC2::NatGateway only allows "outbound" traffic to the internet
Cannot SSH into an instance with a public IP but private subnet
since EC2::NatGateway only allows "outbound" traffic
network address translation (NAT) gateway in the specified public subnet
NAT gateway to allow instances in a private subnet to connect to the Internet
or to other AWS services, but prevent the Internet from initiating a connection with those instances.
Public Subnet
Subnet associated with EC2::RouteTable that has EC2::Route to an EC2::InternetGateway
PublicRoute:
Type: AWS::EC2::Route
Properties:
RouteTableId: !Ref PublicRouteTable
DestinationCidrBlock: 0.0.0.0/0
GatewayId: !Ref InternetGateway
Private Subnet
Subnet associated with EC2::RouteTable that has EC2::Route to an EC2::NatGateway
PrivateRoute1:
Type: AWS::EC2::Route
Properties:
RouteTableId: !Ref PrivateRouteTable1
DestinationCidrBlock: 0.0.0.0/0
NatGatewayId: !Ref NATGateway1
*/
// TemplateVPCPublicPrivate is the CloudFormation template for EC2 VPC.
const TemplateVPCPublicPrivate = `
---
AWSTemplateFormatVersion: '2010-09-09'
Description: 'Amazon EC2 VPC with public and private subnets'
Parameters:
VPCName:
Type: String
Default: aws-k8s-tester-ec2-vpc
Description: name of the VPC
SSHIngressIPv4Range:
Type: String
Default: 0.0.0.0/0
AllowedPattern: '((\d{1,3})\.){3}\d{1,3}/\d{1,2}'
Description: IP range for SSH inbound traffic
VPCCIDR:
Type: String
Default: 192.168.0.0/16
AllowedPattern: '((\d{1,3})\.){3}\d{1,3}/\d{1,2}'
Description: IP range (CIDR notation) for VPC, must be a valid (RFC 1918) CIDR range (from 192.168.0.0 to 192.168.255.255)
PublicSubnetCIDR1:
Type: String
Default: 192.168.64.0/19
AllowedPattern: '((\d{1,3})\.){3}\d{1,3}/\d{1,2}'
Description: CIDR block for public subnet 1 within the VPC (from 192.168.64.0 to 192.168.95.255)
PublicSubnetCIDR2:
Type: String
Default: 192.168.128.0/19
AllowedPattern: '((\d{1,3})\.){3}\d{1,3}/\d{1,2}'
Description: CIDR block for public subnet 2 within the VPC (from 192.168.128.0 to 192.168.159.255)
PublicSubnetCIDR3:
Type: String
Default: 192.168.192.0/19
AllowedPattern: '((\d{1,3})\.){3}\d{1,3}/\d{1,2}'
Description: CIDR block for public subnet 2 within the VPC (from 192.168.192.0 to 192.168.223.255)
PrivateSubnetCIDR1:
Type: String
Default: 192.168.32.0/19
AllowedPattern: '((\d{1,3})\.){3}\d{1,3}/\d{1,2}'
Description: CIDR block for private subnet 1 within the VPC (from 192.168.32.0 to 192.168.63.255)
PrivateSubnetCIDR2:
Type: String
Default: 192.168.96.0/19
AllowedPattern: '((\d{1,3})\.){3}\d{1,3}/\d{1,2}'
Description: CIDR block for private subnet 2 within the VPC (from 192.168.96.0 to 192.168.127.255)
DHCPOptionsDomainName:
Type: String
Default: ""
Description: This value is used to complete unqualified DNS hostnames.
DHCPOptionsDomainNameServers:
Type: CommaDelimitedList
Default: ""
Description: The IPv4 addresses of up to four domain name servers, or AmazonProvidedDNS.
Conditions:
Has2Azs:
Fn::Or:
- Fn::Equals:
- {Ref: 'AWS::Region'}
- ap-south-1
- Fn::Equals:
- {Ref: 'AWS::Region'}
- ap-northeast-2
- Fn::Equals:
- {Ref: 'AWS::Region'}
- ca-central-1
- Fn::Equals:
- {Ref: 'AWS::Region'}
- cn-north-1
- Fn::Equals:
- {Ref: 'AWS::Region'}
- sa-east-1
- Fn::Equals:
- {Ref: 'AWS::Region'}
- us-west-1
HasMoreThan2Azs:
Fn::Not:
- Condition: Has2Azs
HasDHCPOptionsOnlyDomainName:
Fn::And:
- Fn::Not:
- Fn::Equals:
- Ref: DHCPOptionsDomainName
- ''
- Fn::Equals:
- Fn::Join:
- ''
- Ref: DHCPOptionsDomainNameServers
- ''
HasDHCPOptionsOnlyDomainNameServers:
Fn::And:
- Fn::Not:
- Fn::Equals:
- Fn::Join:
- ''
- Ref: DHCPOptionsDomainNameServers
- ''
- Fn::Equals:
- Ref: DHCPOptionsDomainName
- ''
HasDHCPOptionsBothDomains:
Fn::And:
- Fn::Not:
- Fn::Equals:
- Ref: DHCPOptionsDomainName
- ''
- Fn::Not:
- Fn::Equals:
- Fn::Join:
- ''
- Ref: DHCPOptionsDomainNameServers
- ''
Resources:
InternetGateway:
Type: AWS::EC2::InternetGateway
Properties:
Tags:
- Key: Name
Value: !Sub '${AWS::StackName}-InternetGateway'
VPC:
Type: AWS::EC2::VPC
Properties:
CidrBlock: !Ref VPCCIDR
EnableDnsSupport: true
EnableDnsHostnames: true
Tags:
- Key: Name
Value: !Ref VPCName
VPCGatewayAttachment:
Type: AWS::EC2::VPCGatewayAttachment
DependsOn:
- VPC
- InternetGateway
Properties:
InternetGatewayId: !Ref InternetGateway
VpcId: !Ref VPC
PublicSubnet1:
Type: AWS::EC2::Subnet
DependsOn:
- VPC
- VPCGatewayAttachment
Metadata:
Comment: Public Subnet 1, https://docs.aws.amazon.com/eks/latest/userguide/alb-ingress.html
Properties:
AvailabilityZone: !Select [ 0, !GetAZs ]
CidrBlock: !Ref PublicSubnetCIDR1
MapPublicIpOnLaunch: true
VpcId: !Ref VPC
Tags:
- Key: Name
Value: !Sub '${AWS::StackName}-PublicSubnet1'
- Key: Network
Value: Public
- Key: kubernetes.io/role/elb
Value: 1
- Key: kubernetes.io/role/internal-elb
Value: 1
PublicSubnet2:
Type: AWS::EC2::Subnet
DependsOn:
- VPC
- VPCGatewayAttachment
Metadata:
Comment: Public Subnet 2, https://docs.aws.amazon.com/eks/latest/userguide/alb-ingress.html
Properties:
AvailabilityZone: !Select [ 1, !GetAZs ]
CidrBlock: !Ref PublicSubnetCIDR2
MapPublicIpOnLaunch: true
VpcId: !Ref VPC
Tags:
- Key: Name
Value: !Sub '${AWS::StackName}-PublicSubnet2'
- Key: Network
Value: Public
- Key: kubernetes.io/role/elb
Value: 1
- Key: kubernetes.io/role/internal-elb
Value: 1
PublicSubnet3:
Condition: HasMoreThan2Azs
Type: AWS::EC2::Subnet
DependsOn:
- VPC
- VPCGatewayAttachment
Metadata:
Comment: Public Subnet 3, https://docs.aws.amazon.com/eks/latest/userguide/alb-ingress.html
Properties:
AvailabilityZone: !Select [ 2, !GetAZs ]
CidrBlock: !Ref PublicSubnetCIDR3
MapPublicIpOnLaunch: true
VpcId: !Ref VPC
Tags:
- Key: Name
Value: !Sub '${AWS::StackName}-PublicSubnet3'
- Key: Network
Value: Public
- Key: kubernetes.io/role/elb
Value: 1
- Key: kubernetes.io/role/internal-elb
Value: 1
PublicRouteTable:
Type: AWS::EC2::RouteTable
DependsOn:
- VPC
Properties:
VpcId: !Ref VPC
Tags:
- Key: Name
Value: !Sub '${AWS::StackName}-PublicRouteTable'
- Key: Network
Value: Public
PublicRoute:
Type: AWS::EC2::Route
DependsOn:
- VPC
- VPCGatewayAttachment
Properties:
RouteTableId: !Ref PublicRouteTable
DestinationCidrBlock: 0.0.0.0/0
GatewayId: !Ref InternetGateway
PublicSubnet1RouteTableAssociation:
Type: AWS::EC2::SubnetRouteTableAssociation
DependsOn:
- VPC
- VPCGatewayAttachment
- PublicSubnet1
Properties:
SubnetId: !Ref PublicSubnet1
RouteTableId: !Ref PublicRouteTable
PublicSubnet2RouteTableAssociation:
Type: AWS::EC2::SubnetRouteTableAssociation
DependsOn:
- VPC
- VPCGatewayAttachment
- PublicSubnet2
Properties:
SubnetId: !Ref PublicSubnet2
RouteTableId: !Ref PublicRouteTable
PublicSubnet3RouteTableAssociation:
Condition: HasMoreThan2Azs
Type: AWS::EC2::SubnetRouteTableAssociation
DependsOn:
- VPC
- VPCGatewayAttachment
- PublicSubnet3
Properties:
SubnetId: !Ref PublicSubnet3
RouteTableId: !Ref PublicRouteTable
PrivateSubnet1:
Type: AWS::EC2::Subnet
DependsOn:
- VPC
- VPCGatewayAttachment
Metadata:
Comment: Private Subnet 1
Properties:
AvailabilityZone: !Select [ 0, !GetAZs ]
CidrBlock: !Ref PrivateSubnetCIDR1
MapPublicIpOnLaunch: false
VpcId: !Ref VPC
Tags:
- Key: Name
Value: !Sub '${AWS::StackName}-PrivateSubnet1'
- Key: Network
Value: Private
PrivateSubnet2:
Type: AWS::EC2::Subnet
DependsOn:
- VPC
- VPCGatewayAttachment
Metadata:
Comment: Private Subnet 2
Properties:
AvailabilityZone: !Select [ 1, !GetAZs ]
CidrBlock: !Ref PrivateSubnetCIDR2
MapPublicIpOnLaunch: false
VpcId: !Ref VPC
Tags:
- Key: Name
Value: !Sub '${AWS::StackName}-PrivateSubnet2'
- Key: Network
Value: Private
PrivateRouteTable1:
Type: AWS::EC2::RouteTable
Properties:
VpcId: !Ref VPC
Tags:
- Key: Name
Value: !Sub '${AWS::StackName}-PrivateRouteTable1'
- Key: Network
Value: Private1
PrivateRouteTable2:
Type: AWS::EC2::RouteTable
Properties:
VpcId: !Ref VPC
Tags:
- Key: Name
Value: !Sub '${AWS::StackName}-PrivateRouteTable2'
- Key: Network
Value: Private2
NATGatewayEIP1:
Type: AWS::EC2::EIP
DependsOn:
- VPC
- VPCGatewayAttachment
Properties:
Domain: vpc
Tags:
- Key: Name
Value: !Sub '${AWS::StackName}-EIP1'
NATGatewayEIP2:
Type: AWS::EC2::EIP
DependsOn:
- VPC
- VPCGatewayAttachment
Properties:
Domain: vpc
Tags:
- Key: Name
Value: !Sub '${AWS::StackName}-EIP2'
NATGatewayEIP3:
Type: AWS::EC2::EIP
DependsOn:
- VPC
- VPCGatewayAttachment
Properties:
Domain: vpc
Tags:
- Key: Name
Value: !Sub '${AWS::StackName}-EIP3'
NATGateway1:
Type: AWS::EC2::NatGateway
DependsOn:
- VPC
- VPCGatewayAttachment
- PublicSubnet1
- NATGatewayEIP1
Properties:
AllocationId: !GetAtt 'NATGatewayEIP1.AllocationId'
SubnetId: !Ref PublicSubnet1
Tags:
- Key: Name
Value: !Sub '${AWS::StackName}-NATGateway1'
NATGateway2:
Type: AWS::EC2::NatGateway
DependsOn:
- VPC
- VPCGatewayAttachment
- PublicSubnet2
- NATGatewayEIP2
Properties:
AllocationId: !GetAtt 'NATGatewayEIP2.AllocationId'
SubnetId: !Ref PublicSubnet2
Tags:
- Key: Name
Value: !Sub '${AWS::StackName}-NATGateway2'
NATGateway3:
Condition: HasMoreThan2Azs
Type: AWS::EC2::NatGateway
DependsOn:
- VPC
- VPCGatewayAttachment
- PublicSubnet3
- NATGatewayEIP3
Properties:
AllocationId: !GetAtt 'NATGatewayEIP3.AllocationId'
SubnetId: !Ref PublicSubnet3
Tags:
- Key: Name
Value: !Sub '${AWS::StackName}-NATGateway3'
PrivateRoute1:
Type: AWS::EC2::Route
DependsOn:
- VPC
- VPCGatewayAttachment
Properties:
RouteTableId: !Ref PrivateRouteTable1
DestinationCidrBlock: 0.0.0.0/0
NatGatewayId: !Ref NATGateway1
PrivateRoute2:
Type: AWS::EC2::Route
DependsOn:
- VPC
- VPCGatewayAttachment
Properties:
RouteTableId: !Ref PrivateRouteTable2
DestinationCidrBlock: 0.0.0.0/0
NatGatewayId: !Ref NATGateway2
PrivateSubnet1RouteTableAssociation:
Type: AWS::EC2::SubnetRouteTableAssociation
DependsOn:
- VPC
- VPCGatewayAttachment
- PrivateSubnet1
Properties:
SubnetId: !Ref PrivateSubnet1
RouteTableId: !Ref PrivateRouteTable1
PrivateSubnet2RouteTableAssociation:
Type: AWS::EC2::SubnetRouteTableAssociation
DependsOn:
- VPC
- VPCGatewayAttachment
- PrivateSubnet2
Properties:
SubnetId: !Ref PrivateSubnet2
RouteTableId: !Ref PrivateRouteTable2
SecurityGroup:
Type: AWS::EC2::SecurityGroup
DependsOn:
- VPC
- VPCGatewayAttachment
Properties:
GroupDescription: Secured communication
VpcId: !Ref VPC
SSHIngress:
Type: AWS::EC2::SecurityGroupIngress
Properties:
GroupId: !Ref SecurityGroup
IpProtocol: tcp
FromPort: 22
ToPort: 22
CidrIp: !Ref SSHIngressIPv4Range
DHCPOptionsOnlyDomainName:
Condition: HasDHCPOptionsOnlyDomainName
Type: AWS::EC2::DHCPOptions
Properties:
DomainName: !Ref DHCPOptionsDomainName
DHCPOptionsOnlyDomainNameAttachment:
Condition: HasDHCPOptionsOnlyDomainName
Type: AWS::EC2::VPCDHCPOptionsAssociation
Properties:
DhcpOptionsId: !Ref DHCPOptionsOnlyDomainName
VpcId: !Ref VPC
DHCPOptionsOnlyDomainNameServers:
Condition: HasDHCPOptionsOnlyDomainNameServers
Type: AWS::EC2::DHCPOptions
Properties:
DomainNameServers: !Ref DHCPOptionsDomainNameServers
DHCPOptionsOnlyDomainNameServersAttachment:
Condition: HasDHCPOptionsOnlyDomainNameServers
Type: AWS::EC2::VPCDHCPOptionsAssociation
Properties:
DhcpOptionsId: !Ref DHCPOptionsOnlyDomainNameServers
VpcId: !Ref VPC
DHCPOptionsBothDomains:
Condition: HasDHCPOptionsBothDomains
Type: AWS::EC2::DHCPOptions
Properties:
DomainName: !Ref DHCPOptionsDomainName
DomainNameServers: !Ref DHCPOptionsDomainNameServers
DHCPOptionsBothDomainsAttachment:
Condition: HasDHCPOptionsBothDomains
Type: AWS::EC2::VPCDHCPOptionsAssociation
Properties:
DhcpOptionsId: !Ref DHCPOptionsBothDomains
VpcId: !Ref VPC
Outputs:
VPCID:
Value: !Ref VPC
Description: VPC ID
PublicSubnetIDs:
Value:
Fn::If:
- HasMoreThan2Azs
- !Join [ ",", [ !Ref PublicSubnet1, !Ref PublicSubnet2, !Ref PublicSubnet3 ] ]
- !Join [ ",", [ !Ref PublicSubnet1, !Ref PublicSubnet2 ] ]
Description: All public subnet IDs in the VPC
PrivateSubnetIDs:
Value: !Join [ ",", [ !Ref PrivateSubnet1, !Ref PrivateSubnet2 ] ]
Description: All private subnet IDs in the VPC
SecurityGroupID:
Value: !Ref SecurityGroup
Description: Security group ID
`
func (ts *Tester) createVPC() error {
if ts.cfg.VPCID != "" {
ts.lg.Info("querying ELBv2", zap.String("vpc-id", ts.cfg.VPCID))
ctx, cancel := context.WithTimeout(context.Background(), time.Minute)
err := ts.elbv2API.DescribeLoadBalancersPagesWithContext(
ctx,
&elbv2.DescribeLoadBalancersInput{},
func(output *elbv2.DescribeLoadBalancersOutput, _ bool) bool {
for _, ev := range output.LoadBalancers {
arn := aws.StringValue(ev.LoadBalancerArn)
vpcID := aws.StringValue(ev.VpcId)
if vpcID == ts.cfg.VPCID {
ts.lg.Warn("found ELBv2 for this VPC; may overlap with the other cluster",
zap.String("vpc-id", ts.cfg.VPCID),
zap.String("elb-arn", arn),
)
} else {
ts.lg.Info("found ELBv2 for other VPCs", zap.String("vpc-id", vpcID), zap.String("elb-arn", arn))
}
}
return true
})
cancel()
if err != nil {
ts.lg.Warn("failed to describe ELBv2", zap.Error(err))
}
ts.lg.Info("querying subnet IDs for given VPC",
zap.String("vpc-id", ts.cfg.VPCID),
)
sresp, err := ts.ec2API.DescribeSubnets(&ec2.DescribeSubnetsInput{
Filters: []*ec2.Filter{
{
Name: aws.String("vpc-id"),
Values: aws.StringSlice([]string{ts.cfg.VPCID}),
},
},
})
if err != nil {
ts.lg.Warn("failed to subnets", zap.Error(err))
return err
}
ts.cfg.PublicSubnetIDs = make([]string, 0, len(sresp.Subnets))
ts.cfg.PrivateSubnetIDs = make([]string, 0, len(sresp.Subnets))
for _, sv := range sresp.Subnets {
id := aws.StringValue(sv.SubnetId)
networkTagValue := ""
for _, tg := range sv.Tags {
switch aws.StringValue(tg.Key) {
case "Network":
networkTagValue = aws.StringValue(tg.Value)
}
if networkTagValue != "" {
break
}
}
ts.lg.Info("found subnet",
zap.String("id", id),
zap.String("az", aws.StringValue(sv.AvailabilityZone)),
zap.String("network-tag", networkTagValue),
)
switch networkTagValue {
case "Public":
ts.cfg.PublicSubnetIDs = append(ts.cfg.PublicSubnetIDs, id)
case "Private":
ts.cfg.PrivateSubnetIDs = append(ts.cfg.PrivateSubnetIDs, id)
default:
return fmt.Errorf("'Network' tag not found in subnet %q", id)
}
}
if len(ts.cfg.PublicSubnetIDs) == 0 {
return fmt.Errorf("no subnet found for VPC ID %q", ts.cfg.VPCID)
}
ts.lg.Info("querying security IDs", zap.String("vpc-id", ts.cfg.VPCID))
gresp, err := ts.ec2API.DescribeSecurityGroups(&ec2.DescribeSecurityGroupsInput{
Filters: []*ec2.Filter{
{
Name: aws.String("vpc-id"),
Values: aws.StringSlice([]string{ts.cfg.VPCID}),
},
},
})
if err != nil {
ts.lg.Warn("failed to security groups", zap.Error(err))
return err
}
for _, sg := range gresp.SecurityGroups {
id, name := aws.StringValue(sg.GroupId), aws.StringValue(sg.GroupName)
ts.lg.Info("found security group", zap.String("id", id), zap.String("name", name))
if name != "default" {
ts.cfg.SecurityGroupID = id
}
}
if ts.cfg.SecurityGroupID == "" {
return fmt.Errorf("no security group found for VPC ID %q", ts.cfg.VPCID)
}
return ts.cfg.Sync()
}
if !ts.cfg.VPCCreate {
ts.lg.Info("Parameters.VPCCreate false; skipping creation")
return nil
}
if ts.cfg.VPCCFNStackID != "" &&
ts.cfg.VPCID != "" &&
len(ts.cfg.PublicSubnetIDs) > 0 &&
ts.cfg.SecurityGroupID != "" {
ts.lg.Info("VPC already created; no need to create a new one")
return nil
}
templateBody, cfnNetworkTagValue := TemplateVPCPublicPrivate, "Public/Private"
vpcName := ts.cfg.Name + "-vpc-ec2"
// VPC attributes are empty, create a new VPC
// otherwise, use the existing one
ts.lg.Info("creating a new VPC")
stackInput := &cloudformation.CreateStackInput{
StackName: aws.String(vpcName),
Capabilities: aws.StringSlice([]string{"CAPABILITY_IAM"}),
OnFailure: aws.String(cloudformation.OnFailureDelete),
TemplateBody: aws.String(templateBody),
Tags: awscfn.NewTags(map[string]string{
"Kind": "aws-k8s-tester",
"Name": ts.cfg.Name,
"Network": cfnNetworkTagValue,
"aws-k8s-tester-version": version.ReleaseVersion,
}),
Parameters: []*cloudformation.Parameter{
{
ParameterKey: aws.String("VPCName"),
ParameterValue: aws.String(vpcName),
},
},
}
if ts.cfg.VPCCIDR != "" {
stackInput.Parameters = append(stackInput.Parameters, &cloudformation.Parameter{
ParameterKey: aws.String("VPCCIDR"),
ParameterValue: aws.String(ts.cfg.VPCCIDR),
})
}
if ts.cfg.PublicSubnetCIDR1 != "" {
stackInput.Parameters = append(stackInput.Parameters, &cloudformation.Parameter{
ParameterKey: aws.String("PublicSubnetCIDR1"),
ParameterValue: aws.String(ts.cfg.PublicSubnetCIDR1),
})
}
if ts.cfg.PublicSubnetCIDR2 != "" {
stackInput.Parameters = append(stackInput.Parameters, &cloudformation.Parameter{
ParameterKey: aws.String("PublicSubnetCIDR2"),
ParameterValue: aws.String(ts.cfg.PublicSubnetCIDR2),
})
}
if ts.cfg.PublicSubnetCIDR3 != "" {
stackInput.Parameters = append(stackInput.Parameters, &cloudformation.Parameter{
ParameterKey: aws.String("PublicSubnetCIDR3"),
ParameterValue: aws.String(ts.cfg.PublicSubnetCIDR3),
})
}
if ts.cfg.PrivateSubnetCIDR1 != "" {
stackInput.Parameters = append(stackInput.Parameters, &cloudformation.Parameter{
ParameterKey: aws.String("PrivateSubnetCIDR1"),
ParameterValue: aws.String(ts.cfg.PrivateSubnetCIDR1),
})
}
if ts.cfg.PrivateSubnetCIDR2 != "" {
stackInput.Parameters = append(stackInput.Parameters, &cloudformation.Parameter{
ParameterKey: aws.String("PrivateSubnetCIDR2"),
ParameterValue: aws.String(ts.cfg.PrivateSubnetCIDR2),
})
}
if ts.cfg.DHCPOptionsDomainName != "" {
stackInput.Parameters = append(stackInput.Parameters, &cloudformation.Parameter{
ParameterKey: aws.String("DHCPOptionsDomainName"),
ParameterValue: aws.String(ts.cfg.DHCPOptionsDomainName),
})
}
if len(ts.cfg.DHCPOptionsDomainNameServers) > 0 {
stackInput.Parameters = append(stackInput.Parameters, &cloudformation.Parameter{
ParameterKey: aws.String("DHCPOptionsDomainNameServers"),
ParameterValue: aws.String(strings.Join(ts.cfg.DHCPOptionsDomainNameServers, ",")),
})
}
stackOutput, err := ts.cfnAPI.CreateStack(stackInput)
if err != nil {
return err
}
ts.cfg.VPCCFNStackID = aws.StringValue(stackOutput.StackId)
ctx, cancel := context.WithTimeout(context.Background(), 10*time.Minute)
ch := awscfn.Poll(
ctx,
ts.stopCreationCh,
ts.lg,
ts.cfnAPI,
ts.cfg.VPCCFNStackID,
cloudformation.ResourceStatusCreateComplete,
time.Minute+30*time.Second,
20*time.Second,
)
var st awscfn.StackStatus
for st = range ch {
select {
case <-ts.stopCreationCh:
cancel()
return errors.New("aborted")
default:
}
if st.Error != nil {
cancel()
ts.cfg.RecordStatus(fmt.Sprintf("failed to create VPC (%v)", st.Error))
ts.lg.Warn("polling errror", zap.Error(st.Error))
}
}
cancel()
if st.Error != nil {
return st.Error
}
// update status after creating a new VPC
for _, o := range st.Stack.Outputs {
k, v := aws.StringValue(o.OutputKey), aws.StringValue(o.OutputValue)
ts.lg.Info("CFN output", zap.String("key", k), zap.String("value", v))
switch k {
case "VPCID":
ts.cfg.VPCID = v
case "PublicSubnetIDs":
ts.cfg.PublicSubnetIDs = strings.Split(v, ",")
case "PrivateSubnetIDs":
ts.cfg.PrivateSubnetIDs = strings.Split(v, ",")
case "SecurityGroupID":
ts.cfg.SecurityGroupID = v
}
}
ts.lg.Info("created a VPC",
zap.String("vpc-cfn-stack-id", ts.cfg.VPCCFNStackID),
zap.String("vpc-id", ts.cfg.VPCID),
zap.Strings("public-subnet-ids", ts.cfg.PublicSubnetIDs),
zap.Strings("private-subnet-ids", ts.cfg.PrivateSubnetIDs),
zap.String("control-plane-security-group-id", ts.cfg.SecurityGroupID),
)
return ts.cfg.Sync()
}
func (ts *Tester) deleteVPC() error {
if !ts.cfg.VPCCreate {
ts.lg.Info("Parameters.VPCCreate false; skipping deletion")
return nil
}
if ts.cfg.VPCCFNStackID == "" {
ts.lg.Info("empty VPC CFN stack ID; no need to delete VPC")
return nil
}
ts.lg.Info("deleting VPC",
zap.String("vpc-id", ts.cfg.VPCID),
zap.String("vpc-cfn-stack-id", ts.cfg.VPCCFNStackID),
)
deletedResources := make(map[string]struct{})
if ok := ts.deleteELBv2(deletedResources); ok {
time.Sleep(10 * time.Second)
}
now := time.Now()
_, err := ts.cfnAPI.DeleteStack(&cloudformation.DeleteStackInput{
StackName: aws.String(ts.cfg.VPCCFNStackID),
})
if err != nil {
return err
}
ctx, cancel := context.WithTimeout(context.Background(), 10*time.Minute)
ch := awscfn.Poll(
ctx,
make(chan struct{}), // do not exit on stop
ts.lg,
ts.cfnAPI,
ts.cfg.VPCCFNStackID,
cloudformation.ResourceStatusDeleteComplete,
time.Minute+30*time.Second,
20*time.Second,
)
var st awscfn.StackStatus
for st = range ch {
if st.Error != nil {
cancel()
ts.cfg.RecordStatus(fmt.Sprintf("failed to delete VPC (%v)", st.Error))
ts.lg.Warn("polling errror", zap.Error(st.Error))
}
if time.Now().Sub(now) <= 3*time.Minute {
continue
}
// e.g. DependencyViolation: The vpc 'vpc-0127f6d18bd98836a' has dependencies and cannot be deleted
ts.lg.Warn("deleting for awhile; initiating force deletion",
zap.String("vpc-id", ts.cfg.VPCID),
)
if ok := ts.deleteELBv2(deletedResources); ok {
time.Sleep(10 * time.Second)
}
if ok := ts.deleteSubnets(deletedResources); ok {
time.Sleep(10 * time.Second)
}
if _, ok := deletedResources[ts.cfg.VPCID]; ok {
continue
}
if ok := ts.deleteENIs(deletedResources); ok {
time.Sleep(10 * time.Second)
}
if ok := ts.deleteSGs(deletedResources); ok {
time.Sleep(10 * time.Second)
}
if _, ok := deletedResources[ts.cfg.VPCID]; ok {
continue
}
_, derr := ts.ec2API.DeleteVpc(&ec2.DeleteVpcInput{VpcId: aws.String(ts.cfg.VPCID)})
if derr != nil {
ts.lg.Warn("failed to force-delete VPC",
zap.String("vpc-id", ts.cfg.VPCID),
zap.Error(derr),
)
} else {
ts.lg.Info("force-deleted VPC",
zap.String("vpc-id", ts.cfg.VPCID),
)
}
if derr != nil && strings.Contains(derr.Error(), " does not exist") {
deletedResources[ts.cfg.VPCID] = struct{}{}
}
}
cancel()
if st.Error != nil {
return st.Error
}
ts.lg.Info("deleted a VPC",
zap.String("vpc-cfn-stack-id", ts.cfg.VPCCFNStackID),
zap.String("vpc-id", ts.cfg.VPCID),
)
return ts.cfg.Sync()
}
func (ts *Tester) deleteELBv2(deletedResources map[string]struct{}) bool {
ts.lg.Info("deleting ELBv2 for the VPC", zap.String("vpc-id", ts.cfg.VPCID))
elbARNs := make([]string, 0)
ctx, cancel := context.WithTimeout(context.Background(), time.Minute)
err := ts.elbv2API.DescribeLoadBalancersPagesWithContext(
ctx,
&elbv2.DescribeLoadBalancersInput{},
func(output *elbv2.DescribeLoadBalancersOutput, _ bool) bool {
if len(output.LoadBalancers) == 0 {
ts.lg.Info("ELBv2 not found")
}
for _, ev := range output.LoadBalancers {
arn := aws.StringValue(ev.LoadBalancerArn)
if _, ok := deletedResources[arn]; ok {
continue
}
vpcID := aws.StringValue(ev.VpcId)
if vpcID == ts.cfg.VPCID {
elbARNs = append(elbARNs, arn)
ts.lg.Info("found ELBv2 for this VPC",
zap.String("vpc-id", ts.cfg.VPCID),
zap.String("elb-arn", arn),
)
continue
}
ts.lg.Info("found ELBv2 for other VPCs",
zap.String("vpc-id", vpcID),
zap.String("elb-arn", arn),
)
}
return true
})
cancel()
if err != nil {
ts.lg.Warn("failed to describe ELBv2", zap.Error(err))
}
deleted := false
for _, arn := range elbARNs {
ts.lg.Info("removing ELBv2",
zap.String("vpc-id", ts.cfg.VPCID),
zap.String("elb-arn", arn),
)
_, err = ts.elbv2API.DeleteLoadBalancer(&elbv2.DeleteLoadBalancerInput{
LoadBalancerArn: aws.String(arn),
})
if err != nil {
ts.lg.Warn("failed to remove ELBv2",
zap.String("elb-arn", arn),
zap.Error(err),
)
} else {
ts.lg.Info("removed ELBv2", zap.String("elb-arn", arn), zap.Error(err))
deletedResources[arn] = struct{}{}
deleted = true
}
}
return deleted