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vpc.go
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vpc.go
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package eks
import (
"context"
"errors"
"fmt"
"strings"
"time"
"github.com/aws/aws-k8s-tester/pkg/aws/cfn"
"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 EKS VPC.
//
// e.g. An error occurred (InvalidParameterException) when calling the CreateFargateProfile operation: Subnet subnet-123 provided in Fargate Profile is not a private subnet
const TemplateVPCPublicPrivate = `
---
AWSTemplateFormatVersion: '2010-09-09'
Description: 'Amazon EKS VPC with public and private subnets'
Parameters:
VPCName:
Description: name of the VPC
Type: String
Default: aws-k8s-tester-eks-vpc
VPCCIDR:
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)
Type: String
Default: 192.168.0.0/16
AllowedPattern: '((\d{1,3})\.){3}\d{1,3}/\d{1,2}'
PublicSubnetCIDR1:
Description: CIDR block for public subnet 1 within the VPC (from 192.168.64.0 to 192.168.95.255)
Type: String
Default: 192.168.64.0/19
AllowedPattern: '((\d{1,3})\.){3}\d{1,3}/\d{1,2}'
PublicSubnetCIDR2:
Description: CIDR block for public subnet 2 within the VPC (from 192.168.128.0 to 192.168.159.255)
Type: String
Default: 192.168.128.0/19
AllowedPattern: '((\d{1,3})\.){3}\d{1,3}/\d{1,2}'
PublicSubnetCIDR3:
Description: CIDR block for public subnet 2 within the VPC (from 192.168.192.0 to 192.168.223.255)
Type: String
Default: 192.168.192.0/19
AllowedPattern: '((\d{1,3})\.){3}\d{1,3}/\d{1,2}'
PrivateSubnetCIDR1:
Description: CIDR block for private subnet 1 within the VPC (from 192.168.32.0 to 192.168.63.255)
Type: String
Default: 192.168.32.0/19
AllowedPattern: '((\d{1,3})\.){3}\d{1,3}/\d{1,2}'
PrivateSubnetCIDR2:
Description: CIDR block for private subnet 2 within the VPC (from 192.168.96.0 to 192.168.127.255)
Type: String
Default: 192.168.96.0/19
AllowedPattern: '((\d{1,3})\.){3}\d{1,3}/\d{1,2}'
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
ControlPlaneSecurityGroup:
Type: AWS::EC2::SecurityGroup
DependsOn:
- VPC
- VPCGatewayAttachment
Properties:
GroupDescription: Cluster communication with worker nodes
VpcId: !Ref VPC
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
ClusterControlPlaneSecurityGroupID:
Value: !Ref ControlPlaneSecurityGroup
Description: Security group ID for the cluster control plane communication with worker nodes
`
func (ts *Tester) createVPC() error {
if ts.cfg.Parameters.VPCID != "" {
ts.lg.Info("querying ELBv2", zap.String("vpc-id", ts.cfg.Parameters.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.Parameters.VPCID {
ts.lg.Warn("found ELBv2 for this VPC; may overlap with the other cluster",
zap.String("vpc-id", ts.cfg.Parameters.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.Parameters.VPCID),
)
sresp, err := ts.ec2API.DescribeSubnets(&ec2.DescribeSubnetsInput{
Filters: []*ec2.Filter{
{
Name: aws.String("vpc-id"),
Values: aws.StringSlice([]string{ts.cfg.Parameters.VPCID}),
},
},
})
if err != nil {
ts.lg.Warn("failed to subnets", zap.Error(err))
return err
}
ts.cfg.Parameters.PublicSubnetIDs = make([]string, 0, len(sresp.Subnets))
ts.cfg.Parameters.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.Parameters.PublicSubnetIDs = append(ts.cfg.Parameters.PublicSubnetIDs, id)
case "Private":
ts.cfg.Parameters.PrivateSubnetIDs = append(ts.cfg.Parameters.PrivateSubnetIDs, id)
default:
return fmt.Errorf("'Network' tag not found in subnet %q", id)
}
}
if len(ts.cfg.Parameters.PublicSubnetIDs) == 0 {
return fmt.Errorf("no subnet found for VPC ID %q", ts.cfg.Parameters.VPCID)
}
ts.lg.Info("querying security IDs", zap.String("vpc-id", ts.cfg.Parameters.VPCID))
gresp, err := ts.ec2API.DescribeSecurityGroups(&ec2.DescribeSecurityGroupsInput{
Filters: []*ec2.Filter{
{
Name: aws.String("vpc-id"),
Values: aws.StringSlice([]string{ts.cfg.Parameters.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.Status.ClusterControlPlaneSecurityGroupID = id
}
}
if ts.cfg.Status.ClusterControlPlaneSecurityGroupID == "" {
return fmt.Errorf("no security group found for VPC ID %q", ts.cfg.Parameters.VPCID)
}
return ts.cfg.Sync()
}
if !ts.cfg.Parameters.VPCCreate {
ts.lg.Info("Parameters.VPCCreate false; skipping creation")
return nil
}
if ts.cfg.Parameters.VPCCFNStackID != "" &&
ts.cfg.Parameters.VPCID != "" &&
len(ts.cfg.Parameters.PublicSubnetIDs) > 0 &&
ts.cfg.Status.ClusterControlPlaneSecurityGroupID != "" {
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"
// 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: cfn.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.Parameters.VPCCIDR != "" {
stackInput.Parameters = append(stackInput.Parameters, &cloudformation.Parameter{
ParameterKey: aws.String("VPCCIDR"),
ParameterValue: aws.String(ts.cfg.Parameters.VPCCIDR),
})
}
if ts.cfg.Parameters.PublicSubnetCIDR1 != "" {
stackInput.Parameters = append(stackInput.Parameters, &cloudformation.Parameter{
ParameterKey: aws.String("PublicSubnetCIDR1"),
ParameterValue: aws.String(ts.cfg.Parameters.PublicSubnetCIDR1),
})
}
if ts.cfg.Parameters.PublicSubnetCIDR2 != "" {
stackInput.Parameters = append(stackInput.Parameters, &cloudformation.Parameter{
ParameterKey: aws.String("PublicSubnetCIDR2"),
ParameterValue: aws.String(ts.cfg.Parameters.PublicSubnetCIDR2),
})
}
if ts.cfg.Parameters.PublicSubnetCIDR3 != "" {
stackInput.Parameters = append(stackInput.Parameters, &cloudformation.Parameter{
ParameterKey: aws.String("PublicSubnetCIDR3"),
ParameterValue: aws.String(ts.cfg.Parameters.PublicSubnetCIDR3),
})
}
if ts.cfg.Parameters.PrivateSubnetCIDR1 != "" {
stackInput.Parameters = append(stackInput.Parameters, &cloudformation.Parameter{
ParameterKey: aws.String("PrivateSubnetCIDR1"),
ParameterValue: aws.String(ts.cfg.Parameters.PrivateSubnetCIDR1),
})
}
if ts.cfg.Parameters.PrivateSubnetCIDR2 != "" {
stackInput.Parameters = append(stackInput.Parameters, &cloudformation.Parameter{
ParameterKey: aws.String("PrivateSubnetCIDR2"),
ParameterValue: aws.String(ts.cfg.Parameters.PrivateSubnetCIDR2),
})
}
if ts.cfg.Parameters.DHCPOptionsDomainName != "" {
stackInput.Parameters = append(stackInput.Parameters, &cloudformation.Parameter{
ParameterKey: aws.String("DHCPOptionsDomainName"),
ParameterValue: aws.String(ts.cfg.Parameters.DHCPOptionsDomainName),
})
}
if len(ts.cfg.Parameters.DHCPOptionsDomainNameServers) > 0 {
stackInput.Parameters = append(stackInput.Parameters, &cloudformation.Parameter{
ParameterKey: aws.String("DHCPOptionsDomainNameServers"),
ParameterValue: aws.String(strings.Join(ts.cfg.Parameters.DHCPOptionsDomainNameServers, ",")),
})
}
stackOutput, err := ts.cfnAPI.CreateStack(stackInput)
if err != nil {
return err
}
ts.cfg.Parameters.VPCCFNStackID = aws.StringValue(stackOutput.StackId)
ctx, cancel := context.WithTimeout(context.Background(), 10*time.Minute)
ch := cfn.Poll(
ctx,
ts.stopCreationCh,
ts.lg,
ts.cfnAPI,
ts.cfg.Parameters.VPCCFNStackID,
cloudformation.ResourceStatusCreateComplete,
time.Minute+30*time.Second,
20*time.Second,
)
var st cfn.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.Parameters.VPCID = v
case "PublicSubnetIDs":
ts.cfg.Parameters.PublicSubnetIDs = strings.Split(v, ",")
case "PrivateSubnetIDs":
ts.cfg.Parameters.PrivateSubnetIDs = strings.Split(v, ",")
case "ClusterControlPlaneSecurityGroupID":
ts.cfg.Status.ClusterControlPlaneSecurityGroupID = v
}
}
ts.lg.Info("created a VPC",
zap.String("vpc-cfn-stack-id", ts.cfg.Parameters.VPCCFNStackID),
zap.String("vpc-id", ts.cfg.Parameters.VPCID),
zap.Strings("public-subnet-ids", ts.cfg.Parameters.PublicSubnetIDs),
zap.Strings("private-subnet-ids", ts.cfg.Parameters.PrivateSubnetIDs),
zap.String("control-plane-security-group-id", ts.cfg.Status.ClusterControlPlaneSecurityGroupID),
)
return ts.cfg.Sync()
}
func (ts *Tester) deleteVPC() error {
if !ts.cfg.Parameters.VPCCreate {
ts.lg.Info("Parameters.VPCCreate false; skipping deletion")
return nil
}
if ts.cfg.Parameters.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.Parameters.VPCID),
zap.String("vpc-cfn-stack-id", ts.cfg.Parameters.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.Parameters.VPCCFNStackID),
})
if err != nil {
return err
}
ctx, cancel := context.WithTimeout(context.Background(), 10*time.Minute)
ch := cfn.Poll(
ctx,
make(chan struct{}), // do not exit on stop
ts.lg,
ts.cfnAPI,
ts.cfg.Parameters.VPCCFNStackID,
cloudformation.ResourceStatusDeleteComplete,
time.Minute+30*time.Second,
20*time.Second,
)
var st cfn.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.Parameters.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.Parameters.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.Parameters.VPCID]; ok {
continue
}
_, derr := ts.ec2API.DeleteVpc(&ec2.DeleteVpcInput{VpcId: aws.String(ts.cfg.Parameters.VPCID)})
if derr != nil {
ts.lg.Warn("failed to force-delete VPC",
zap.String("vpc-id", ts.cfg.Parameters.VPCID),
zap.Error(derr),
)
} else {
ts.lg.Info("force-deleted VPC",
zap.String("vpc-id", ts.cfg.Parameters.VPCID),
)
}
if derr != nil && strings.Contains(derr.Error(), " does not exist") {
deletedResources[ts.cfg.Parameters.VPCID] = struct{}{}
}
}
cancel()
if st.Error != nil {
return st.Error
}
ts.lg.Info("deleted a VPC",
zap.String("vpc-cfn-stack-id", ts.cfg.Parameters.VPCCFNStackID),
zap.String("vpc-id", ts.cfg.Parameters.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.Parameters.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.Parameters.VPCID {
elbARNs = append(elbARNs, arn)
ts.lg.Info("found ELBv2 for this VPC",
zap.String("vpc-id", ts.cfg.Parameters.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.Parameters.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
}
func (ts *Tester) deleteSubnets(deletedResources map[string]struct{}) bool {
ts.lg.Info("deleting subnets for the VPC", zap.String("vpc-id", ts.cfg.Parameters.VPCID))
subnets := append(ts.cfg.Parameters.PublicSubnetIDs, ts.cfg.Parameters.PrivateSubnetIDs...)
deleted := false
for _, subnetID := range subnets {
if _, ok := deletedResources[subnetID]; ok {
continue
}
_, err := ts.ec2API.DeleteSubnet(&ec2.DeleteSubnetInput{
SubnetId: aws.String(subnetID),
})
if err != nil {
if strings.Contains(err.Error(), " does not exist") {
deletedResources[subnetID] = struct{}{}