AWS CDK Reference

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v2.274.0

SubnetSelection Struct ​

Customize subnets that are selected for placement of ENIs.

Constructs that allow customization of VPC placement use parameters of this type to provide placement settings.

By default, the instances are placed in the private subnets.

Source
aws-ec2/lib/vpc.ts
Type last changed
v2.41.0 · 8 Sep 2022

Example ​

ts
declare const vpc: ec2.Vpc;

const cluster = new docdb.DatabaseCluster(this, 'Database', {
  masterUser: {
    username: 'myuser',
  },
  instanceType: ec2.InstanceType.of(ec2.InstanceClass.MEMORY5, ec2.InstanceSize.LARGE),
  vpcSubnets: {
    subnetType: ec2.SubnetType.PUBLIC,
  },
  vpc,
  removalPolicy: RemovalPolicy.SNAPSHOT,
  instanceRemovalPolicy: RemovalPolicy.RETAIN,
});

Properties ​

availabilityZonesstring[]availability_zonestyping.List[str]availabilityZonesList<String>AvailabilityZonesstring[]AvailabilityZones*[]*string#
Select subnets only in the given AZs.

Default: no filtering on AZs is done

onePerAzbooleanone_per_azboolonePerAzBooleanOnePerAzboolOnePerAz*bool= false#
If true, return at most one subnet per AZ.
subnetFiltersSubnetFilter[]subnet_filterstyping.List[SubnetFilter]subnetFiltersList<SubnetFilter>SubnetFiltersSubnetFilter[]SubnetFilters*[]SubnetFilter= none#
List of provided subnet filters.
subnetGroupNamestringsubnet_group_namestrsubnetGroupNameStringSubnetGroupNamestringSubnetGroupName*string#
Select the subnet group with the given name.

Default: Selection by type instead of by name

notes

Select the subnet group with the given name. This only needs to be used if you have multiple subnet groups of the same type and you need to distinguish between them. Otherwise, prefer subnetType.

This field does not select individual subnets, it selects all subnets that share the given subnet group name. This is the name supplied in subnetConfiguration.

At most one of subnetType and subnetGroupName can be supplied.

subnetsISubnet[]subnetstyping.List[ISubnet]subnetsList<ISubnet>SubnetsISubnet[]Subnets*[]ISubnet#
Explicitly select individual subnets.

Default: Use all subnets in a selected group (all private subnets by default)

Use this if you don't want to automatically use all subnets in a group, but have a need to control selection down to individual subnets.

Cannot be specified together with subnetType or subnetGroupName.

subnetTypeSubnetTypesubnet_typeSubnetTypesubnetTypeSubnetTypeSubnetTypeSubnetTypeSubnetTypeSubnetType#
Select all subnets of the given type.

Default: SubnetType.PRIVATE_WITH_EGRESS (or ISOLATED or PUBLIC if there are no PRIVATE_WITH_EGRESS subnets)

At most one of subnetType and subnetGroupName can be supplied.