CfnLifecycleHook

class aws_cdk.aws_autoscaling.CfnLifecycleHook(scope, id, *, auto_scaling_group_name, lifecycle_transition, default_result=None, heartbeat_timeout=None, lifecycle_hook_name=None, notification_metadata=None, notification_target_arn=None, role_arn=None)

Bases: aws_cdk.core.CfnResource

A CloudFormation AWS::AutoScaling::LifecycleHook.

The AWS::AutoScaling::LifecycleHook resource specifies lifecycle hooks for an Auto Scaling group. These hooks let you create solutions that are aware of events in the Auto Scaling instance lifecycle, and then perform a custom action on instances when the corresponding lifecycle event occurs. A lifecycle hook provides a specified amount of time (one hour by default) to wait for the action to complete before the instance transitions to the next state.

Use lifecycle hooks to prepare new instances for use or to delay them from being registered behind a load balancer before their configuration has been applied completely. You can also use lifecycle hooks to prepare running instances to be terminated by, for example, downloading logs or other data.

For more information, see Amazon EC2 Auto Scaling lifecycle hooks in the Amazon EC2 Auto Scaling User Guide .

CloudformationResource

AWS::AutoScaling::LifecycleHook

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-autoscaling-lifecyclehook.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_autoscaling as autoscaling

cfn_lifecycle_hook = autoscaling.CfnLifecycleHook(self, "MyCfnLifecycleHook",
    auto_scaling_group_name="autoScalingGroupName",
    lifecycle_transition="lifecycleTransition",

    # the properties below are optional
    default_result="defaultResult",
    heartbeat_timeout=123,
    lifecycle_hook_name="lifecycleHookName",
    notification_metadata="notificationMetadata",
    notification_target_arn="notificationTargetArn",
    role_arn="roleArn"
)

Create a new AWS::AutoScaling::LifecycleHook.

Parameters
  • scope (Construct) –

    • scope in which this resource is defined.

  • id (str) –

    • scoped id of the resource.

  • auto_scaling_group_name (str) – The name of the Auto Scaling group.

  • lifecycle_transition (str) – The lifecycle transition. For Auto Scaling groups, there are two major lifecycle transitions. - To create a lifecycle hook for scale-out events, specify autoscaling:EC2_INSTANCE_LAUNCHING . - To create a lifecycle hook for scale-in events, specify autoscaling:EC2_INSTANCE_TERMINATING .

  • default_result (Optional[str]) – The action the Auto Scaling group takes when the lifecycle hook timeout elapses or if an unexpected failure occurs. The default value is ABANDON . Valid values: CONTINUE | ABANDON

  • heartbeat_timeout (Union[int, float, None]) – The maximum time, in seconds, that can elapse before the lifecycle hook times out. The range is from 30 to 7200 seconds. The default value is 3600 seconds (1 hour).

  • lifecycle_hook_name (Optional[str]) – The name of the lifecycle hook.

  • notification_metadata (Optional[str]) – Additional information that you want to include any time Amazon EC2 Auto Scaling sends a message to the notification target.

  • notification_target_arn (Optional[str]) – The Amazon Resource Name (ARN) of the notification target that Amazon EC2 Auto Scaling sends notifications to when an instance is in a wait state for the lifecycle hook. You can specify an Amazon SNS topic or an Amazon SQS queue.

  • role_arn (Optional[str]) – The ARN of the IAM role that allows the Auto Scaling group to publish to the specified notification target. For information about creating this role, see Configure a notification target for a lifecycle hook in the Amazon EC2 Auto Scaling User Guide . Valid only if the notification target is an Amazon SNS topic or an Amazon SQS queue.

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

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.

Return type

None

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

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.

Return type

Any

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::AutoScaling::LifecycleHook'
auto_scaling_group_name

The name of the Auto Scaling group.

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-autoscaling-lifecyclehook.html#cfn-autoscaling-lifecyclehook-autoscalinggroupname

Return type

str

cfn_options

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

Return type

ICfnResourceOptions

cfn_resource_type

AWS resource type.

Return type

str

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.

Return type

List[str]

default_result

The action the Auto Scaling group takes when the lifecycle hook timeout elapses or if an unexpected failure occurs.

The default value is ABANDON .

Valid values: CONTINUE | ABANDON

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-autoscaling-lifecyclehook.html#cfn-autoscaling-lifecyclehook-defaultresult

Return type

Optional[str]

heartbeat_timeout

The maximum time, in seconds, that can elapse before the lifecycle hook times out.

The range is from 30 to 7200 seconds. The default value is 3600 seconds (1 hour).

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-autoscaling-lifecyclehook.html#cfn-autoscaling-lifecyclehook-heartbeattimeout

Return type

Union[int, float, None]

lifecycle_hook_name

The name of the lifecycle hook.

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-autoscaling-lifecyclehook.html#cfn-autoscaling-lifecyclehook-lifecyclehookname

Return type

Optional[str]

lifecycle_transition

The lifecycle transition. For Auto Scaling groups, there are two major lifecycle transitions.

  • To create a lifecycle hook for scale-out events, specify autoscaling:EC2_INSTANCE_LAUNCHING .

  • To create a lifecycle hook for scale-in events, specify autoscaling:EC2_INSTANCE_TERMINATING .

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-autoscaling-lifecyclehook.html#cfn-autoscaling-lifecyclehook-lifecycletransition

Return type

str

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).

Return type

str

Returns

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

node

The construct tree node associated with this construct.

Return type

ConstructNode

notification_metadata

Additional information that you want to include any time Amazon EC2 Auto Scaling sends a message to the notification target.

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-autoscaling-lifecyclehook.html#cfn-autoscaling-lifecyclehook-notificationmetadata

Return type

Optional[str]

notification_target_arn

The Amazon Resource Name (ARN) of the notification target that Amazon EC2 Auto Scaling sends notifications to when an instance is in a wait state for the lifecycle hook.

You can specify an Amazon SNS topic or an Amazon SQS queue.

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-autoscaling-lifecyclehook.html#cfn-autoscaling-lifecyclehook-notificationtargetarn

Return type

Optional[str]

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 }).

Return type

str

role_arn

The ARN of the IAM role that allows the Auto Scaling group to publish to the specified notification target.

For information about creating this role, see Configure a notification target for a lifecycle hook in the Amazon EC2 Auto Scaling User Guide .

Valid only if the notification target is an Amazon SNS topic or an Amazon SQS queue.

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-autoscaling-lifecyclehook.html#cfn-autoscaling-lifecyclehook-rolearn

Return type

Optional[str]

stack

The stack in which this element is defined.

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

Return type

Stack

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