class CfnLaunchTemplate (construct)

Language	Type name
.NET	Amazon.CDK.AWS.EC2.CfnLaunchTemplate
Go	github.com/aws/aws-cdk-go/awscdk/v2/awsec2#CfnLaunchTemplate
Java	software.amazon.awscdk.services.ec2.CfnLaunchTemplate
Python	aws_cdk.aws_ec2.CfnLaunchTemplate
TypeScript	aws-cdk-lib » aws_ec2 » CfnLaunchTemplate

Implements IConstruct, IDependable, IInspectable

Specifies the properties for creating a launch template.

The minimum required properties for specifying a launch template are as follows:

• You must specify at least one property for the launch template data.
• You can optionally specify a name for the launch template. If you do not specify a name, AWS CloudFormation creates a name for you.

A launch template can contain some or all of the configuration information to launch an instance. When you launch an instance using a launch template, instance properties that are not specified in the launch template use default values, except the ImageId property, which has no default value. If you do not specify an AMI ID for the launch template ImageId property, you must specify an AMI ID for the instance ImageId property.

For more information, see Launch an instance from a launch template in the Amazon EC2 User Guide .

See also: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-ec2-launchtemplate.html

Example

declare const cluster: eks.Cluster;

const userData = `MIME-Version: 1.0
Content-Type: multipart/mixed; boundary="==MYBOUNDARY=="

--==MYBOUNDARY==
Content-Type: text/x-shellscript; charset="us-ascii"

#!/bin/bash
echo "Running custom user data script"

--==MYBOUNDARY==--\\
`;
const lt = new ec2.CfnLaunchTemplate(this, 'LaunchTemplate', {
  launchTemplateData: {
    instanceType: 't3.small',
    userData: Fn.base64(userData),
  },
});

cluster.addNodegroupCapacity('extra-ng', {
  launchTemplateSpec: {
    id: lt.ref,
    version: lt.attrLatestVersionNumber,
  },
});

Initializer

new CfnLaunchTemplate(scope: Construct, id: string, props: CfnLaunchTemplateProps)

Parameters

• scope Construct — Scope in which this resource is defined.
• id string — Construct identifier for this resource (unique in its scope).
• props CfnLaunchTemplateProps — Resource properties.

Construct Props

Name	Type	Description
launchTemplateData	IResolvable | LaunchTemplateDataProperty	The information for the launch template.
launchTemplateName?	string	A name for the launch template.
tagSpecifications?	IResolvable | IResolvable | LaunchTemplateTagSpecificationProperty[]	The tags to apply to the launch template on creation.
versionDescription?	string	A description for the first version of the launch template.

---

launchTemplateData

Type: IResolvable | LaunchTemplateDataProperty

The information for the launch template.

See also: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-ec2-launchtemplate.html#cfn-ec2-launchtemplate-launchtemplatedata

---

launchTemplateName?

Type: string (optional)

A name for the launch template.

See also: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-ec2-launchtemplate.html#cfn-ec2-launchtemplate-launchtemplatename

---

tagSpecifications?

Type: IResolvable | IResolvable | LaunchTemplateTagSpecificationProperty[] (optional)

The tags to apply to the launch template on creation.

To tag the launch template, the resource type must be launch-template .

To specify the tags for resources that are created during instance launch, use TagSpecifications .

See also: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-ec2-launchtemplate.html#cfn-ec2-launchtemplate-tagspecifications

---

versionDescription?

Type: string (optional)

A description for the first version of the launch template.

See also: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-ec2-launchtemplate.html#cfn-ec2-launchtemplate-versiondescription

Properties

Name	Type	Description
attrDefaultVersionNumber	string	The default version of the launch template, such as 2.
attrLatestVersionNumber	string	The latest version of the launch template, such as 5 .
attrLaunchTemplateId	string	The ID of the launch template.
cfnOptions	ICfnResourceOptions	Options for this resource, such as condition, update policy etc.
cfnProperties	{ [string]: any }
cfnResourceType	string	AWS resource type.
creationStack	string[]
launchTemplateData	IResolvable | LaunchTemplateDataProperty	The information for the launch template.
logicalId	string	The logical ID for this CloudFormation stack element.
node	Node	The tree node.
ref	string	Return a string that will be resolved to a CloudFormation { Ref } for this element.
stack	Stack	The stack in which this element is defined.
launchTemplateName?	string	A name for the launch template.
tagSpecifications?	IResolvable | IResolvable | LaunchTemplateTagSpecificationProperty[]	The tags to apply to the launch template on creation.
versionDescription?	string	A description for the first version of the launch template.
static CFN_RESOURCE_TYPE_NAME	string	The CloudFormation resource type name for this resource class.

---

attrDefaultVersionNumber

Type: string

The default version of the launch template, such as 2.

The default version of a launch template cannot be specified in AWS CloudFormation . The default version can be set in the Amazon EC2 console or by using the modify-launch-template AWS CLI command.

---

attrLatestVersionNumber

Type: string

The latest version of the launch template, such as 5 .

---

attrLaunchTemplateId

Type: string

The ID of the launch template.

---

cfnOptions

Type: ICfnResourceOptions

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

---

cfnProperties

Type: { [string]: any }

---

cfnResourceType

Type: string

AWS resource type.

---

creationStack

Type: string[]

---

launchTemplateData

Type: IResolvable | LaunchTemplateDataProperty

The information for the launch template.

---

logicalId

Type: string

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).

---

node

Type: Node

The tree node.

---

ref

Type: string

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

Type: Stack

The stack in which this element is defined.

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

---

launchTemplateName?

Type: string (optional)

A name for the launch template.

---

tagSpecifications?

Type: IResolvable | IResolvable | LaunchTemplateTagSpecificationProperty[] (optional)

The tags to apply to the launch template on creation.

---

versionDescription?

Type: string (optional)

A description for the first version of the launch template.

---

static CFN_RESOURCE_TYPE_NAME

Type: string

The CloudFormation resource type name for this resource class.

Methods

Name	Description
addDeletionOverride(path)	Syntactic sugar for addOverride(path, undefined).
addDependency(target)	Indicates that this resource depends on another resource and cannot be provisioned unless the other resource has been successfully provisioned.
addDependsOn(target)⚠️	Indicates that this resource depends on another resource and cannot be provisioned unless the other resource has been successfully provisioned.
addMetadata(key, value)	Add a value to the CloudFormation Resource Metadata.
addOverride(path, value)	Adds an override to the synthesized CloudFormation resource.
addPropertyDeletionOverride(propertyPath)	Adds an override that deletes the value of a property from the resource definition.
addPropertyOverride(propertyPath, value)	Adds an override to a resource property.
applyRemovalPolicy(policy?, options?)	Sets the deletion policy of the resource based on the removal policy specified.
getAtt(attributeName, typeHint?)	Returns a token for an runtime attribute of this resource.
getMetadata(key)	Retrieve a value value from the CloudFormation Resource Metadata.
inspect(inspector)	Examines the CloudFormation resource and discloses attributes.
obtainDependencies()	Retrieves an array of resources this resource depends on.
obtainResourceDependencies()	Get a shallow copy of dependencies between this resource and other resources in the same stack.
overrideLogicalId(newLogicalId)	Overrides the auto-generated logical ID with a specific ID.
removeDependency(target)	Indicates that this resource no longer depends on another resource.
replaceDependency(target, newTarget)	Replaces one dependency with another.
toString()	Returns a string representation of this construct.
protected renderProperties(props)

---

addDeletionOverride(path)

public addDeletionOverride(path: string): void

Parameters

• path string — The path of the value to delete.

Syntactic sugar for addOverride(path, undefined).

---

addDependency(target)

public addDependency(target: CfnResource): void

Parameters

• target CfnResource

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.

---

addDependsOn(target)⚠️

public addDependsOn(target: CfnResource): void

⚠️ Deprecated: use addDependency

Parameters

• target CfnResource

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

---

addMetadata(key, value)

public addMetadata(key: string, value: any): void

Parameters

• key string
• value any

Add a value to the CloudFormation Resource Metadata.

See also: [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.](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.)

---

addOverride(path, value)

public addOverride(path: string, value: any): void

Parameters

• path string — - The path of the property, you can use dot notation to override values in complex types.
• value any — - The 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,

cfnResource.addOverride('Properties.GlobalSecondaryIndexes.0.Projection.NonKeyAttributes', ['myattribute']);
cfnResource.addOverride('Properties.GlobalSecondaryIndexes.1.ProjectionType', 'INCLUDE');

would add the overrides

"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.

---

addPropertyDeletionOverride(propertyPath)

public addPropertyDeletionOverride(propertyPath: string): void

Parameters

• propertyPath string — The path to the property.

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

---

addPropertyOverride(propertyPath, value)

public addPropertyOverride(propertyPath: string, value: any): void

Parameters

• propertyPath string — The path of the property.
• value any — The value.

Adds an override to a resource property.

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

---

applyRemovalPolicy(policy?, options?)

public applyRemovalPolicy(policy?: RemovalPolicy, options?: RemovalPolicyOptions): void

Parameters

• policy RemovalPolicy
• options RemovalPolicyOptions

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). In some cases, a snapshot can be taken of the resource prior to deletion (RemovalPolicy.SNAPSHOT). A list of resources that support this policy can be found in the following link:

See also: https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-attribute-deletionpolicy.html#aws-attribute-deletionpolicy-options

---

getAtt(attributeName, typeHint?)

public getAtt(attributeName: string, typeHint?: ResolutionTypeHint): Reference

Parameters

• attributeName string — The name of the attribute.
• typeHint ResolutionTypeHint

Returns

• Reference

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.

---

getMetadata(key)

public getMetadata(key: string): any

Parameters

• key string

Returns

• any

Retrieve a value value from the CloudFormation Resource Metadata.

See also: [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.](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)

public inspect(inspector: TreeInspector): void

Parameters

• inspector TreeInspector — tree inspector to collect and process attributes.

Examines the CloudFormation resource and discloses attributes.

---

obtainDependencies()

public obtainDependencies(): Stack | CfnResource[]

Returns

• Stack | CfnResource[]

Retrieves an array of resources this resource depends on.

This assembles dependencies on resources across stacks (including nested stacks) automatically.

---

obtainResourceDependencies()

public obtainResourceDependencies(): CfnResource[]

Returns

• CfnResource[]

Get a shallow copy of dependencies between this resource and other resources in the same stack.

---

overrideLogicalId(newLogicalId)

public overrideLogicalId(newLogicalId: string): void

Parameters

• newLogicalId string — The new logical ID to use for this stack element.

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

---

removeDependency(target)

public removeDependency(target: CfnResource): void

Parameters

• target CfnResource

Indicates that this resource no longer depends on another resource.

This can be used for resources across stacks (including nested stacks) and the dependency will automatically be removed from the relevant scope.

---

replaceDependency(target, newTarget)

public replaceDependency(target: CfnResource, newTarget: CfnResource): void

Parameters

• target CfnResource — The dependency to replace.
• newTarget CfnResource — The new dependency to add.

Replaces one dependency with another.

---

toString()

public toString(): string

Returns

• string

Returns a string representation of this construct.

---

protected renderProperties(props)

protected renderProperties(props: { [string]: any }): { [string]: any }

Parameters

• props { [string]: any }

Returns

• { [string]: any }