CfnScheduledAction

class aws_cdk.aws_autoscaling.CfnScheduledAction(scope, id, *, auto_scaling_group_name, desired_capacity=None, end_time=None, max_size=None, min_size=None, recurrence=None, start_time=None, time_zone=None)

Bases: aws_cdk.core.CfnResource

A CloudFormation AWS::AutoScaling::ScheduledAction.

The AWS::AutoScaling::ScheduledAction resource specifies an Amazon EC2 Auto Scaling scheduled action so that the Auto Scaling group can change the number of instances available for your application in response to predictable load changes.

When you update a stack with an Auto Scaling group and scheduled action, CloudFormation always sets the min size, max size, and desired capacity properties of your group to the values that are defined in the AWS::AutoScaling::AutoScalingGroup section of your template. However, you might not want CloudFormation to do that when you have a scheduled action in effect. You can use an UpdatePolicy attribute to prevent CloudFormation from changing the min size, max size, or desired capacity property values during a stack update unless you modified the individual values in your template. If you have rolling updates enabled, before you can update the Auto Scaling group, you must suspend scheduled actions by specifying an UpdatePolicy attribute for the Auto Scaling group. You can find a sample update policy for rolling updates in Auto scaling template snippets .

For more information, see Scheduled scaling and Suspending and resuming scaling processes in the Amazon EC2 Auto Scaling User Guide .

CloudformationResource

AWS::AutoScaling::ScheduledAction

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-as-scheduledaction.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_scheduled_action = autoscaling.CfnScheduledAction(self, "MyCfnScheduledAction",
    auto_scaling_group_name="autoScalingGroupName",

    # the properties below are optional
    desired_capacity=123,
    end_time="endTime",
    max_size=123,
    min_size=123,
    recurrence="recurrence",
    start_time="startTime",
    time_zone="timeZone"
)

Create a new AWS::AutoScaling::ScheduledAction.

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.

  • desired_capacity (Union[int, float, None]) – The desired capacity is the initial capacity of the Auto Scaling group after the scheduled action runs and the capacity it attempts to maintain. It can scale beyond this capacity if you add more scaling conditions. .. epigraph:: You must specify at least one of the following properties: MaxSize , MinSize , or DesiredCapacity .

  • end_time (Optional[str]) – The date and time for the recurring schedule to end, in UTC. For example, "2021-06-01T00:00:00Z" .

  • max_size (Union[int, float, None]) – The maximum size of the Auto Scaling group.

  • min_size (Union[int, float, None]) – The minimum size of the Auto Scaling group.

  • recurrence (Optional[str]) – The recurring schedule for this action. This format consists of five fields separated by white spaces: [Minute] [Hour] [Day_of_Month] [Month_of_Year] [Day_of_Week]. The value must be in quotes (for example, "30 0 1 1,6,12 *" ). For more information about this format, see Crontab . When StartTime and EndTime are specified with Recurrence , they form the boundaries of when the recurring action starts and stops. Cron expressions use Universal Coordinated Time (UTC) by default.

  • start_time (Optional[str]) – The date and time for this action to start, in YYYY-MM-DDThh:mm:ssZ format in UTC/GMT only and in quotes (for example, "2021-06-01T00:00:00Z" ). If you specify Recurrence and StartTime , Amazon EC2 Auto Scaling performs the action at this time, and then performs the action based on the specified recurrence.

  • time_zone (Optional[str]) – Specifies the time zone for a cron expression. If a time zone is not provided, UTC is used by default. Valid values are the canonical names of the IANA time zones, derived from the IANA Time Zone Database (such as Etc/GMT+9 or Pacific/Tahiti ). For more information, see https://en.wikipedia.org/wiki/List_of_tz_database_time_zones .

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::ScheduledAction'
auto_scaling_group_name

The name of the Auto Scaling group.

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-as-scheduledaction.html#cfn-as-scheduledaction-asgname

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]

desired_capacity

The desired capacity is the initial capacity of the Auto Scaling group after the scheduled action runs and the capacity it attempts to maintain.

It can scale beyond this capacity if you add more scaling conditions. .. epigraph:

You must specify at least one of the following properties: ``MaxSize`` , ``MinSize`` , or ``DesiredCapacity`` .
Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-as-scheduledaction.html#cfn-as-scheduledaction-desiredcapacity

Return type

Union[int, float, None]

end_time

The date and time for the recurring schedule to end, in UTC.

For example, "2021-06-01T00:00:00Z" .

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-as-scheduledaction.html#cfn-as-scheduledaction-endtime

Return type

Optional[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.

max_size

The maximum size of the Auto Scaling group.

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-as-scheduledaction.html#cfn-as-scheduledaction-maxsize

Return type

Union[int, float, None]

min_size

The minimum size of the Auto Scaling group.

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-as-scheduledaction.html#cfn-as-scheduledaction-minsize

Return type

Union[int, float, None]

node

The construct tree node associated with this construct.

Return type

ConstructNode

recurrence

The recurring schedule for this action.

This format consists of five fields separated by white spaces: [Minute] [Hour] [Day_of_Month] [Month_of_Year] [Day_of_Week]. The value must be in quotes (for example, "30 0 1 1,6,12 *" ). For more information about this format, see Crontab .

When StartTime and EndTime are specified with Recurrence , they form the boundaries of when the recurring action starts and stops.

Cron expressions use Universal Coordinated Time (UTC) by default.

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-as-scheduledaction.html#cfn-as-scheduledaction-recurrence

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

stack

The stack in which this element is defined.

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

Return type

Stack

start_time

ssZ format in UTC/GMT only and in quotes (for example, "2021-06-01T00:00:00Z" ).

If you specify Recurrence and StartTime , Amazon EC2 Auto Scaling performs the action at this time, and then performs the action based on the specified recurrence.

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-as-scheduledaction.html#cfn-as-scheduledaction-starttime

Type

The date and time for this action to start, in YYYY-MM-DDThh

Type

mm

Return type

Optional[str]

time_zone

Specifies the time zone for a cron expression.

If a time zone is not provided, UTC is used by default.

Valid values are the canonical names of the IANA time zones, derived from the IANA Time Zone Database (such as Etc/GMT+9 or Pacific/Tahiti ). For more information, see https://en.wikipedia.org/wiki/List_of_tz_database_time_zones .

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-as-scheduledaction.html#cfn-as-scheduledaction-timezone

Return type

Optional[str]

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