CfnSubnet

class aws_cdk.aws_ec2.CfnSubnet(scope, id, *, vpc_id, assign_ipv6_address_on_creation=None, availability_zone=None, availability_zone_id=None, cidr_block=None, enable_dns64=None, ipv6_cidr_block=None, ipv6_native=None, map_public_ip_on_launch=None, outpost_arn=None, private_dns_name_options_on_launch=None, tags=None)

Bases: CfnResource

A CloudFormation AWS::EC2::Subnet.

Specifies a subnet for the specified VPC.

For an IPv4 only subnet, specify an IPv4 CIDR block. If the VPC has an IPv6 CIDR block, you can create an IPv6 only subnet or a dual stack subnet instead. For an IPv6 only subnet, specify an IPv6 CIDR block. For a dual stack subnet, specify both an IPv4 CIDR block and an IPv6 CIDR block.

For more information, see Subnets for your VPC in the Amazon VPC User Guide .

CloudformationResource: AWS::EC2::Subnet
Link: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-ec2-subnet.html
ExampleMetadata: fixture=_generated

Example:

# The code below shows an example of how to instantiate this type.
# The values are placeholders you should change.
import aws_cdk.aws_ec2 as ec2

# private_dns_name_options_on_launch: Any

cfn_subnet = ec2.CfnSubnet(self, "MyCfnSubnet",
    vpc_id="vpcId",

    # the properties below are optional
    assign_ipv6_address_on_creation=False,
    availability_zone="availabilityZone",
    availability_zone_id="availabilityZoneId",
    cidr_block="cidrBlock",
    enable_dns64=False,
    ipv6_cidr_block="ipv6CidrBlock",
    ipv6_native=False,
    map_public_ip_on_launch=False,
    outpost_arn="outpostArn",
    private_dns_name_options_on_launch=private_dns_name_options_on_launch,
    tags=[CfnTag(
        key="key",
        value="value"
    )]
)

Create a new AWS::EC2::Subnet.

Parameters

scope (Construct) –
- scope in which this resource is defined.
id (str) –
- scoped id of the resource.
vpc_id (str) – The ID of the VPC the subnet is in. If you update this property, you must also update the CidrBlock property.
assign_ipv6_address_on_creation (Union[bool, IResolvable, None]) – Indicates whether a network interface created in this subnet receives an IPv6 address. The default value is false . If you specify AssignIpv6AddressOnCreation , you must also specify Ipv6CidrBlock .
availability_zone (Optional[str]) – The Availability Zone of the subnet. If you update this property, you must also update the CidrBlock property.
availability_zone_id (Optional[str]) – The AZ ID of the subnet.
cidr_block (Optional[str]) – The IPv4 CIDR block assigned to the subnet. If you update this property, we create a new subnet, and then delete the existing one.
enable_dns64 (Union[bool, IResolvable, None]) – Indicates whether DNS queries made to the Amazon-provided DNS Resolver in this subnet should return synthetic IPv6 addresses for IPv4-only destinations. For more information, see DNS64 and NAT64 in the Amazon Virtual Private Cloud User Guide .
ipv6_cidr_block (Optional[str]) – The IPv6 CIDR block. If you specify AssignIpv6AddressOnCreation , you must also specify Ipv6CidrBlock .
ipv6_native (Union[bool, IResolvable, None]) – Indicates whether this is an IPv6 only subnet. For more information, see Subnet basics in the Amazon Virtual Private Cloud User Guide .
map_public_ip_on_launch (Union[bool, IResolvable, None]) – Indicates whether instances launched in this subnet receive a public IPv4 address. The default value is false .
outpost_arn (Optional[str]) – The Amazon Resource Name (ARN) of the Outpost.
private_dns_name_options_on_launch (Optional[Any]) – The hostname type for EC2 instances launched into this subnet and how DNS A and AAAA record queries to the instances should be handled. For more information, see Amazon EC2 instance hostname types in the Amazon Elastic Compute Cloud User Guide . Available options: - EnableResourceNameDnsAAAARecord (true | false) - EnableResourceNameDnsARecord (true | false) - HostnameType (ip-name | resource-name)
tags (Optional[Sequence[Union[CfnTag, Dict[str, Any]]]]) – Any tags assigned to the subnet.

Methods

add_deletion_override(path)

Syntactic sugar for addOverride(path, undefined).

Parameters: path (str) – The path of the value to delete.
Return type: None

add_depends_on(target)

Indicates that this resource depends on another resource and cannot be provisioned unless the other resource has been successfully provisioned.

This can be used for resources across stacks (or nested stack) boundaries and the dependency will automatically be transferred to the relevant scope.

Parameters

target (CfnResource) –

Return type

None

add_metadata(key, value)

Add a value to the CloudFormation Resource Metadata.

Parameters

key (str) –
value (Any) –

See

Return type

None

https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/metadata-section-structure.html

Note that this is a different set of metadata from CDK node metadata; this metadata ends up in the stack template under the resource, whereas CDK node metadata ends up in the Cloud Assembly.

add_override(path, value)

Adds an override to the synthesized CloudFormation resource.

To add a property override, either use addPropertyOverride or prefix path with “Properties.” (i.e. Properties.TopicName).

If the override is nested, separate each nested level using a dot (.) in the path parameter. If there is an array as part of the nesting, specify the index in the path.

To include a literal . in the property name, prefix with a \. In most programming languages you will need to write this as "\\." because the \ itself will need to be escaped.

For example:

cfn_resource.add_override("Properties.GlobalSecondaryIndexes.0.Projection.NonKeyAttributes", ["myattribute"])
cfn_resource.add_override("Properties.GlobalSecondaryIndexes.1.ProjectionType", "INCLUDE")

would add the overrides Example:

"Properties": {
   "GlobalSecondaryIndexes": [
     {
       "Projection": {
         "NonKeyAttributes": [ "myattribute" ]
         ...
       }
       ...
     },
     {
       "ProjectionType": "INCLUDE"
       ...
     },
   ]
   ...
}

The value argument to addOverride will not be processed or translated in any way. Pass raw JSON values in here with the correct capitalization for CloudFormation. If you pass CDK classes or structs, they will be rendered with lowercased key names, and CloudFormation will reject the template.

Parameters

path (str) –
- The path of the property, you can use dot notation to override values in complex types. Any intermdediate keys will be created as needed.
value (Any) –
- The value. Could be primitive or complex.

Return type

None

add_property_deletion_override(property_path)

Adds an override that deletes the value of a property from the resource definition.

Parameters: property_path (str) – The path to the property.
Return type: None

add_property_override(property_path, value)

Adds an override to a resource property.

Syntactic sugar for addOverride("Properties.<...>", value).

Parameters

property_path (str) – The path of the property.
value (Any) – The value.

Return type

None

apply_removal_policy(policy=None, *, apply_to_update_replace_policy=None, default=None)

Sets the deletion policy of the resource based on the removal policy specified.

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 (Optional[RemovalPolicy]) –
apply_to_update_replace_policy (Optional[bool]) – Apply the same deletion policy to the resource’s “UpdateReplacePolicy”. Default: true
default (Optional[RemovalPolicy]) – The default policy to apply in case the removal policy is not defined. Default: - Default value is resource specific. To determine the default value for a resoure, please consult that specific resource’s documentation.

Return type

None

get_att(attribute_name)

Returns a token for an runtime attribute of this resource.

Ideally, use generated attribute accessors (e.g. resource.arn), but this can be used for future compatibility in case there is no generated attribute.

Parameters: attribute_name (str) – The name of the attribute.
Return type: Reference

get_metadata(key)

Retrieve a value value from the CloudFormation Resource Metadata.

Parameters

key (str) –

See

Return type

Any

https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/metadata-section-structure.html

Note that this is a different set of metadata from CDK node metadata; this metadata ends up in the stack template under the resource, whereas CDK node metadata ends up in the Cloud Assembly.

inspect(inspector)

Examines the CloudFormation resource and discloses attributes.

Parameters

inspector (TreeInspector) –

tree inspector to collect and process attributes.

Return type

None

override_logical_id(new_logical_id)

Overrides the auto-generated logical ID with a specific ID.

Parameters: new_logical_id (str) – The new logical ID to use for this stack element.
Return type: None

to_string()

Returns a string representation of this construct.

Return type: str
Returns: a string representation of this resource

Attributes

CFN_RESOURCE_TYPE_NAME = 'AWS::EC2::Subnet'

assign_ipv6_address_on_creation

Indicates whether a network interface created in this subnet receives an IPv6 address. The default value is false .

If you specify AssignIpv6AddressOnCreation , you must also specify Ipv6CidrBlock .

Link: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-ec2-subnet.html#cfn-ec2-subnet-assignipv6addressoncreation

attr_availability_zone

.

{ "Fn::GetAtt" : [ "mySubnet", "AvailabilityZone" ] }

CloudformationAttribute: AvailabilityZone
Type: The Availability Zone of this subnet. For example

attr_ipv6_cidr_blocks

The IPv6 CIDR blocks that are associated with the subnet, such as [ 2001:db8:1234:1a00::/64 ] .

CloudformationAttribute: Ipv6CidrBlocks

attr_network_acl_association_id

The ID of the network ACL that is associated with the subnet’s VPC, such as acl-5fb85d36 .

CloudformationAttribute: NetworkAclAssociationId

attr_outpost_arn

The Amazon Resource Name (ARN) of the Outpost.

CloudformationAttribute: OutpostArn

attr_subnet_id

The ID of the subnet.

CloudformationAttribute: SubnetId

attr_vpc_id

The ID of the subnet’s VPC, such as vpc-11ad4878 .

CloudformationAttribute: VpcId

availability_zone

The Availability Zone of the subnet.

If you update this property, you must also update the CidrBlock property.

Link: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-ec2-subnet.html#cfn-ec2-subnet-availabilityzone

availability_zone_id

The AZ ID of the subnet.

Link: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-ec2-subnet.html#cfn-ec2-subnet-availabilityzoneid

cfn_options: Options for this resource, such as condition, update policy etc.

cfn_resource_type: AWS resource type.

cidr_block

The IPv4 CIDR block assigned to the subnet.

If you update this property, we create a new subnet, and then delete the existing one.

Link: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-ec2-subnet.html#cfn-ec2-subnet-cidrblock

creation_stack

return:

the stack trace of the point where this Resource was created from, sourced from the +metadata+ entry typed +aws:cdk:logicalId+, and with the bottom-most node +internal+ entries filtered.

enable_dns64

Indicates whether DNS queries made to the Amazon-provided DNS Resolver in this subnet should return synthetic IPv6 addresses for IPv4-only destinations.

For more information, see DNS64 and NAT64 in the Amazon Virtual Private Cloud User Guide .

Link: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-ec2-subnet.html#cfn-ec2-subnet-enabledns64

ipv6_cidr_block

The IPv6 CIDR block.

If you specify AssignIpv6AddressOnCreation , you must also specify Ipv6CidrBlock .

Link: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-ec2-subnet.html#cfn-ec2-subnet-ipv6cidrblock

ipv6_native

Indicates whether this is an IPv6 only subnet.

For more information, see Subnet basics in the Amazon Virtual Private Cloud User Guide .

Link: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-ec2-subnet.html#cfn-ec2-subnet-ipv6native

logical_id

The logical ID for this CloudFormation stack element.

The logical ID of the element is calculated from the path of the resource node in the construct tree.

To override this value, use overrideLogicalId(newLogicalId).

Returns

the logical ID as a stringified token. This value will only get resolved during synthesis.

map_public_ip_on_launch

Indicates whether instances launched in this subnet receive a public IPv4 address.

The default value is false .

Link: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-ec2-subnet.html#cfn-ec2-subnet-mappubliciponlaunch

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

outpost_arn

The Amazon Resource Name (ARN) of the Outpost.

Link: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-ec2-subnet.html#cfn-ec2-subnet-outpostarn

private_dns_name_options_on_launch

The hostname type for EC2 instances launched into this subnet and how DNS A and AAAA record queries to the instances should be handled.

For more information, see Amazon EC2 instance hostname types in the Amazon Elastic Compute Cloud User Guide .

Available options:

EnableResourceNameDnsAAAARecord (true | false)
EnableResourceNameDnsARecord (true | false)
HostnameType (ip-name | resource-name)

Link: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-ec2-subnet.html#cfn-ec2-subnet-privatednsnameoptionsonlaunch

ref

Return a string that will be resolved to a CloudFormation { Ref } for this element.

If, by any chance, the intrinsic reference of a resource is not a string, you could coerce it to an IResolvable through Lazy.any({ produce: resource.ref }).

stack

The stack in which this element is defined.

CfnElements must be defined within a stack scope (directly or indirectly).

tags

Any tags assigned to the subnet.

Link: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-ec2-subnet.html#cfn-ec2-subnet-tags

vpc_id

The ID of the VPC the subnet is in.

If you update this property, you must also update the CidrBlock property.

Link: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-ec2-subnet.html#cfn-ec2-subnet-vpcid

Static Methods

classmethod is_cfn_element(x)

Returns true if a construct is a stack element (i.e. part of the synthesized cloudformation template).

Uses duck-typing instead of instanceof to allow stack elements from different versions of this library to be included in the same stack.

Parameters

x (Any) –

Return type

bool

Returns

The construct as a stack element or undefined if it is not a stack element.

classmethod is_cfn_resource(construct)

Check whether the given construct is a CfnResource.

Parameters

construct (IConstruct) –

Return type

bool

classmethod is_construct(x)

Return whether the given object is a Construct.

Parameters

x (Any) –

Return type

bool

PrivateDnsNameOptionsOnLaunchProperty

class CfnSubnet.PrivateDnsNameOptionsOnLaunchProperty(*, enable_resource_name_dns_aaaa_record=None, enable_resource_name_dns_a_record=None, hostname_type=None)

Bases: object

Describes the options for instance hostnames.

Parameters

enable_resource_name_dns_aaaa_record (Union[bool, IResolvable, None]) – Indicates whether to respond to DNS queries for instance hostname with DNS AAAA records.
enable_resource_name_dns_a_record (Union[bool, IResolvable, None]) – Indicates whether to respond to DNS queries for instance hostnames with DNS A records.
hostname_type (Optional[str]) – The type of hostname for EC2 instances. For IPv4 only subnets, an instance DNS name must be based on the instance IPv4 address. For IPv6 only subnets, an instance DNS name must be based on the instance ID. For dual-stack subnets, you can specify whether DNS names use the instance IPv4 address or the instance ID.

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-ec2-subnet-privatednsnameoptionsonlaunch.html

ExampleMetadata

fixture=_generated

Example:

# The code below shows an example of how to instantiate this type.
# The values are placeholders you should change.
import aws_cdk.aws_ec2 as ec2

private_dns_name_options_on_launch_property = ec2.CfnSubnet.PrivateDnsNameOptionsOnLaunchProperty(
    enable_resource_name_dns_aaaa_record=False,
    enable_resource_name_dns_aRecord=False,
    hostname_type="hostnameType"
)

Attributes

enable_resource_name_dns_a_record

Indicates whether to respond to DNS queries for instance hostnames with DNS A records.

Link: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-ec2-subnet-privatednsnameoptionsonlaunch.html#cfn-ec2-subnet-privatednsnameoptionsonlaunch-enableresourcenamednsarecord

enable_resource_name_dns_aaaa_record

Indicates whether to respond to DNS queries for instance hostname with DNS AAAA records.

Link: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-ec2-subnet-privatednsnameoptionsonlaunch.html#cfn-ec2-subnet-privatednsnameoptionsonlaunch-enableresourcenamednsaaaarecord

hostname_type

The type of hostname for EC2 instances.

For IPv4 only subnets, an instance DNS name must be based on the instance IPv4 address. For IPv6 only subnets, an instance DNS name must be based on the instance ID. For dual-stack subnets, you can specify whether DNS names use the instance IPv4 address or the instance ID.

Link: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-ec2-subnet-privatednsnameoptionsonlaunch.html#cfn-ec2-subnet-privatednsnameoptionsonlaunch-hostnametype