Created
April 26, 2019 18:01
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CDK VPC Subnets with CIDR Addresses
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import cdk = require('@aws-cdk/cdk'); | |
import ec2 = require('@aws-cdk/aws-ec2'); | |
import { SubnetType } from '@aws-cdk/aws-ec2'; | |
const region = 'us-east'; | |
const azA = `${region}-1a`; | |
const azB = `${region}-1b`; | |
const azC = `${region}-1c`; | |
const availabilityZones = [azA, azB, azC]; | |
const publicCidrs = ['10.1.192.0/24', '10.1.194.0/24', '10.1.196.0/24'] | |
const privateCidrs = ['10.1.193.0/24', '10.1.195.0/24', '10.1.197.0/24'] | |
export class KhCdkInfrastructureStack extends cdk.Stack { | |
constructor(scope: cdk.App, id: string, props?: cdk.StackProps) { | |
super(scope, id, props); | |
const vpc = new ec2.VpcNetwork(this, 'VPC', { | |
maxAZs: 3, | |
cidr: '10.1.192.0/18', | |
enableDnsHostnames: true, | |
enableDnsSupport: true, | |
vpnGateway: true, // export bug: https://github.com/awslabs/aws-cdk/issues/2339 - will remove when fixed | |
subnetConfiguration: [ | |
{ | |
cidrMask: 24, | |
name: 'Public', | |
subnetType: SubnetType.Public, | |
}, | |
{ | |
cidrMask: 24, | |
name: 'Private', | |
subnetType: SubnetType.Private, | |
} | |
], | |
}); | |
const vpcResource = vpc.node.findChild('Resource') as ec2.CfnVPC; | |
vpcResource.addPropertyOverride('Tags', { | |
"Key" : 'Application', | |
"Value" : 'HeyKind' | |
}); | |
// Iterate the public subnets | |
for (let [key, subnet] of vpc.publicSubnets.entries()) { | |
const subnetSource = subnet.node.findChild('Subnet') as ec2.CfnSubnet; | |
subnetSource.addPropertyOverride('CidrBlock', publicCidrs[key]); | |
subnetSource.addPropertyOverride('AvailabilityZone', availabilityZones[key]); | |
} | |
// Iterate the private subnets | |
for (let [key, subnet] of vpc.privateSubnets.entries()) { | |
const subnetSource = subnet.node.findChild('Subnet') as ec2.CfnSubnet; | |
subnetSource.addPropertyOverride('CidrBlock', privateCidrs[key]); | |
subnetSource.addPropertyOverride('AvailabilityZone', availabilityZones[key]); | |
} | |
/* Outputs to be for App Stack. | |
* Will be imported with: cdk.Fn.importValue('VpcId') | |
* @see {@link: https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/intrinsic-function-reference-importvalue.html} | |
* @see {@link: https://awslabs.github.io/aws-cdk/refs/_aws-cdk_cdk.html?highlight=importvalue#@aws-cdk/cdk.Fn.importValue} | |
* @see {@link: https://awslabs.github.io/aws-cdk/refs/_aws-cdk_aws-ec2.html#@aws-cdk/aws-ec2.VpcNetwork.importFromContext} | |
*/ | |
vpc.export(); | |
} | |
} |
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