Subnet

class aws_cdk.aws_ec2.Subnet(scope, id, *, availability_zone, cidr_block, vpc_id, map_public_ip_on_launch=None)

Bases: Resource

Represents a new VPC subnet resource.

Resource:: AWS::EC2::Subnet
ExampleMetadata:: infused

Example:

# cluster: ecs.Cluster

load_balanced_fargate_service = ecs_patterns.ApplicationLoadBalancedFargateService(self, "Service",
    cluster=cluster,
    memory_limit_mi_b=1024,
    desired_count=1,
    cpu=512,
    task_image_options=ecsPatterns.ApplicationLoadBalancedTaskImageOptions(
        image=ecs.ContainerImage.from_registry("amazon/amazon-ecs-sample")
    ),
    task_subnets=ec2.SubnetSelection(
        subnets=[ec2.Subnet.from_subnet_id(self, "subnet", "VpcISOLATEDSubnet1Subnet80F07FA0")]
    )
)

Parameters:

scope (Construct) –
id (str) –
availability_zone (str) – The availability zone for the subnet.
cidr_block (str) – The CIDR notation for this subnet.
vpc_id (str) – The VPC which this subnet is part of.
map_public_ip_on_launch (Optional[bool]) – Controls if a public IP is associated to an instance at launch. Default: true in Subnet.Public, false in Subnet.Private or Subnet.Isolated.

Methods

add_default_internet_route(gateway_id, gateway_attachment)

Create a default route that points to a passed IGW, with a dependency on the IGW’s attachment to the VPC.

Parameters:

gateway_id (str) – the logical ID (ref) of the gateway attached to your VPC.
gateway_attachment (IDependable) – the gateway attachment construct to be added as a dependency.

Return type:

None

add_default_nat_route(nat_gateway_id)

Adds an entry to this subnets route table that points to the passed NATGatewayId.

Parameters:: nat_gateway_id (str) – The ID of the NAT gateway.
Return type:: None

add_route(id, *, router_id, router_type, destination_cidr_block=None, destination_ipv6_cidr_block=None, enables_internet_connectivity=None)

Adds an entry to this subnets route table.

Parameters:

id (str) –
router_id (str) – The ID of the router. Can be an instance ID, gateway ID, etc, depending on the router type.
router_type (RouterType) – What type of router to route this traffic to.
destination_cidr_block (Optional[str]) – IPv4 range this route applies to. Default: ‘0.0.0.0/0’
destination_ipv6_cidr_block (Optional[str]) – IPv6 range this route applies to. Default: - Uses IPv6
enables_internet_connectivity (Optional[bool]) – Whether this route will enable internet connectivity. If true, this route will be added before any AWS resources that depend on internet connectivity in the VPC will be created. Default: false

Return type:

None

apply_removal_policy(policy)

Apply the given removal policy to this resource.

The Removal Policy controls what happens to this resource when it stops being managed by CloudFormation, either because you’ve removed it from the CDK application or because you’ve made a change that requires the resource to be replaced.

The resource can be deleted (RemovalPolicy.DESTROY), or left in your AWS account for data recovery and cleanup later (RemovalPolicy.RETAIN).

Parameters:

policy (RemovalPolicy) –

Return type:

None

associate_network_acl(id, network_acl)

Associate a Network ACL with this subnet.

Parameters:

id (str) –
network_acl (INetworkAcl) –

Return type:

None

to_string()

Returns a string representation of this construct.

Return type:: str

Attributes

availability_zone: The Availability Zone the subnet is located in.

dependency_elements: Parts of this VPC subnet.

env

The environment this resource belongs to.

For resources that are created and managed by the CDK (generally, those created by creating new class instances like Role, Bucket, etc.), this is always the same as the environment of the stack they belong to; however, for imported resources (those obtained from static methods like fromRoleArn, fromBucketName, etc.), that might be different than the stack they were imported into.

internet_connectivity_established: Dependable that can be depended upon to force internet connectivity established on the VPC.

ipv4_cidr_block

The IPv4 CIDR block for this subnet.

Attribute:: true

network_acl

Network ACL associated with this Subnet.

Upon creation, this is the default ACL which allows all traffic, except explicit DENY entries that you add.

You can replace it with a custom ACL which denies all traffic except the explicit ALLOW entries that you add by creating a NetworkAcl object and calling associateNetworkAcl().

node: The construct tree node associated with this construct.

route_table: The routeTableId attached to this subnet.

stack: The stack in which this resource is defined.

subnet_availability_zone

true

Type:: attribute

subnet_id: The subnetId for this particular subnet.

subnet_ipv6_cidr_blocks

true

Type:: attribute

subnet_network_acl_association_id

true

Type:: attribute

subnet_outpost_arn

The Amazon Resource Name (ARN) of the Outpost for this subnet (if one exists).

Attribute:: true

subnet_vpc_id

true

Type:: attribute

Static Methods

classmethod from_subnet_attributes(scope, id, *, subnet_id, availability_zone=None, ipv4_cidr_block=None, route_table_id=None)

Parameters:

scope (Construct) –
id (str) –
subnet_id (str) – The subnetId for this particular subnet.
availability_zone (Optional[str]) – The Availability Zone the subnet is located in. Default: - No AZ information, cannot use AZ selection features
ipv4_cidr_block (Optional[str]) – The IPv4 CIDR block associated with the subnet. Default: - No CIDR information, cannot use CIDR filter features
route_table_id (Optional[str]) – The ID of the route table for this particular subnet. Default: - No route table information, cannot create VPC endpoints

Return type:

ISubnet

classmethod from_subnet_id(scope, id, subnet_id)

Import existing subnet from id.

Parameters:

scope (Construct) –
id (str) –
subnet_id (str) –

Return type:

ISubnet

classmethod is_construct(x)

Return whether the given object is a Construct.

Parameters:

x (Any) –

Return type:

bool

classmethod is_resource(construct)

Check whether the given construct is a Resource.

Parameters:

construct (IConstruct) –

Return type:

bool

classmethod is_vpc_subnet(x)

Parameters:

x (Any) –

Return type:

bool