class CfnStack (construct)

Language	Type name
.NET	`Amazon.CDK.AWS.CloudFormation.CfnStack`
Java	`software.amazon.awscdk.services.cloudformation.CfnStack`
Python	`aws_cdk.aws_cloudformation.CfnStack`
TypeScript	`@aws-cdk/aws-cloudformation` » `CfnStack`

Implements IConstruct, IConstruct, IDependable, IInspectable

A CloudFormation AWS::CloudFormation::Stack.

The AWS::CloudFormation::Stack resource nests a stack as a resource in a top-level template.

You can add output values from a nested stack within the containing template. You use the GetAtt function with the nested stack's logical name and the name of the output value in the nested stack in the format Outputs. *NestedStackOutputName* .

We strongly recommend that updates to nested stacks are run from the parent stack.

When you apply template changes to update a top-level stack, CloudFormation updates the top-level stack and initiates an update to its nested stacks. CloudFormation updates the resources of modified nested stacks, but doesn't update the resources of unmodified nested stacks. For more information, see CloudFormation stack updates .

You must acknowledge IAM capabilities for nested stacks that contain IAM resources. Also, verify that you have cancel update stack permissions, which is required if an update rolls back. For more information about IAM and CloudFormation , see Controlling access with AWS Identity and Access Management .

Example

// The code below shows an example of how to instantiate this type.
// The values are placeholders you should change.
import * as cloudformation from '@aws-cdk/aws-cloudformation';
const cfnStack = new cloudformation.CfnStack(this, 'MyCfnStack', {
  templateUrl: 'templateUrl',

  // the properties below are optional
  notificationArns: ['notificationArns'],
  parameters: {
    parametersKey: 'parameters',
  },
  tags: [{
    key: 'key',
    value: 'value',
  }],
  timeoutInMinutes: 123,
});

Initializer

new CfnStack(scope: Construct, id: string, props: CfnStackProps)

Parameters

scope Construct — - scope in which this resource is defined.
id string — - scoped id of the resource.
props CfnStackProps — - resource properties.

Create a new AWS::CloudFormation::Stack.

Construct Props

Name	Type	Description
templateUrl	`string`	Location of file containing the template body.
notificationArns?	`string[]`	The Amazon Simple Notification Service (Amazon SNS) topic ARNs to publish stack related events.
parameters?	`IResolvable` `\| { [string]: string }`	The set value pairs that represent the parameters passed to CloudFormation when this nested stack is created.
tags?	`CfnTag[]`	Key-value pairs to associate with this stack.
timeoutInMinutes?	`number`	The length of time, in minutes, that CloudFormation waits for the nested stack to reach the `CREATE_COMPLETE` state.

templateUrl

Type: string

Location of file containing the template body.

The URL must point to a template (max size: 460,800 bytes) that's located in an Amazon S3 bucket. For more information, see Template anatomy .

Whether an update causes interruptions depends on the resources that are being updated. An update never causes a nested stack to be replaced.

notificationArns?

Type: string[] (optional)

The Amazon Simple Notification Service (Amazon SNS) topic ARNs to publish stack related events.

You can find your Amazon SNS topic ARNs using the Amazon SNS console or your Command Line Interface (CLI).

parameters?

Type: IResolvable | { [string]: string } (optional)

The set value pairs that represent the parameters passed to CloudFormation when this nested stack is created.

Each parameter has a name corresponding to a parameter defined in the embedded template and a value representing the value that you want to set for the parameter.

If you use the Ref function to pass a parameter value to a nested stack, comma-delimited list parameters must be of type String . In other words, you can't pass values that are of type CommaDelimitedList to nested stacks.

Conditional. Required if the nested stack requires input parameters.

Whether an update causes interruptions depends on the resources that are being updated. An update never causes a nested stack to be replaced.

tags?

Type: CfnTag[] (optional)

Key-value pairs to associate with this stack.

AWS CloudFormation also propagates these tags to the resources created in the stack. A maximum number of 50 tags can be specified.

timeoutInMinutes?

Type: number (optional)

The length of time, in minutes, that CloudFormation waits for the nested stack to reach the CREATE_COMPLETE state.

The default is no timeout. When CloudFormation detects that the nested stack has reached the CREATE_COMPLETE state, it marks the nested stack resource as CREATE_COMPLETE in the parent stack and resumes creating the parent stack. If the timeout period expires before the nested stack reaches CREATE_COMPLETE , CloudFormation marks the nested stack as failed and rolls back both the nested stack and parent stack.

Updates aren't supported.

Properties

Name	Type	Description
cfnOptions	`ICfnResourceOptions`	Options for this resource, such as condition, update policy etc.
cfnProperties	`{ [string]: any }`
cfnResourceType	`string`	AWS resource type.
creationStack	`string[]`
logicalId	`string`	The logical ID for this CloudFormation stack element.
node	`ConstructNode`	The construct tree node associated with this construct.
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.
tags	`TagManager`	Key-value pairs to associate with this stack.
templateUrl	`string`	Location of file containing the template body.
notificationArns?	`string[]`	The Amazon Simple Notification Service (Amazon SNS) topic ARNs to publish stack related events.
parameters?	`IResolvable` `\| { [string]: string }`	The set value pairs that represent the parameters passed to CloudFormation when this nested stack is created.
timeoutInMinutes?	`number`	The length of time, in minutes, that CloudFormation waits for the nested stack to reach the `CREATE_COMPLETE` state.
static CFN_RESOURCE_TYPE_NAME	`string`	The CloudFormation resource type name for this resource class.

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[]

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: ConstructNode

The construct tree node associated with this construct.

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).

templateUrl

Type: string

Location of file containing the template body.

The URL must point to a template (max size: 460,800 bytes) that's located in an Amazon S3 bucket. For more information, see Template anatomy .

Whether an update causes interruptions depends on the resources that are being updated. An update never causes a nested stack to be replaced.

notificationArns?

Type: string[] (optional)

The Amazon Simple Notification Service (Amazon SNS) topic ARNs to publish stack related events.

You can find your Amazon SNS topic ARNs using the Amazon SNS console or your Command Line Interface (CLI).

parameters?

Type: IResolvable | { [string]: string } (optional)

The set value pairs that represent the parameters passed to CloudFormation when this nested stack is created.

Each parameter has a name corresponding to a parameter defined in the embedded template and a value representing the value that you want to set for the parameter.

If you use the Ref function to pass a parameter value to a nested stack, comma-delimited list parameters must be of type String . In other words, you can't pass values that are of type CommaDelimitedList to nested stacks.

Conditional. Required if the nested stack requires input parameters.

Whether an update causes interruptions depends on the resources that are being updated. An update never causes a nested stack to be replaced.

timeoutInMinutes?

Type: number (optional)

The length of time, in minutes, that CloudFormation waits for the nested stack to reach the CREATE_COMPLETE state.

Updates aren't supported.

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)`.
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)	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.
overrideLogicalId(newLogicalId)	Overrides the auto-generated logical ID with a specific ID.
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).

addDependsOn(target)

public addDependsOn(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.

addMetadata(key, value)

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

Parameters

key string
value any

Add a value to the CloudFormation Resource Metadata.

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).

getAtt(attributeName)

public getAtt(attributeName: string): Reference

Parameters

attributeName string — The name of the attribute.

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.

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.

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.

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 }