AutoScalingGroupCapacityOptions

class aws_cdk.aws_eks.AutoScalingGroupCapacityOptions(*, allow_all_outbound=None, associate_public_ip_address=None, auto_scaling_group_name=None, block_devices=None, cooldown=None, desired_capacity=None, group_metrics=None, health_check=None, ignore_unmodified_size_properties=None, instance_monitoring=None, key_name=None, max_capacity=None, max_instance_lifetime=None, min_capacity=None, new_instances_protected_from_scale_in=None, notifications=None, notifications_topic=None, replacing_update_min_successful_instances_percent=None, resource_signal_count=None, resource_signal_timeout=None, rolling_update_configuration=None, signals=None, spot_price=None, termination_policies=None, update_policy=None, update_type=None, vpc_subnets=None, instance_type, bootstrap_enabled=None, bootstrap_options=None, machine_image_type=None, map_role=None, spot_interrupt_handler=None)

Bases: CommonAutoScalingGroupProps

Options for adding worker nodes.

Parameters:
  • allow_all_outbound (Optional[bool]) – Whether the instances can initiate connections to anywhere by default. Default: true

  • associate_public_ip_address (Optional[bool]) – Whether instances in the Auto Scaling Group should have public IP addresses associated with them. Default: - Use subnet setting.

  • auto_scaling_group_name (Optional[str]) – The name of the Auto Scaling group. This name must be unique per Region per account. Default: - Auto generated by CloudFormation

  • block_devices (Optional[Sequence[Union[BlockDevice, Dict[str, Any]]]]) – Specifies how block devices are exposed to the instance. You can specify virtual devices and EBS volumes. Each instance that is launched has an associated root device volume, either an Amazon EBS volume or an instance store volume. You can use block device mappings to specify additional EBS volumes or instance store volumes to attach to an instance when it is launched. Default: - Uses the block device mapping of the AMI

  • cooldown (Optional[Duration]) – Default scaling cooldown for this AutoScalingGroup. Default: Duration.minutes(5)

  • desired_capacity (Union[int, float, None]) – Initial amount of instances in the fleet. If this is set to a number, every deployment will reset the amount of instances to this number. It is recommended to leave this value blank. Default: minCapacity, and leave unchanged during deployment

  • group_metrics (Optional[Sequence[GroupMetrics]]) – Enable monitoring for group metrics, these metrics describe the group rather than any of its instances. To report all group metrics use GroupMetrics.all() Group metrics are reported in a granularity of 1 minute at no additional charge. Default: - no group metrics will be reported

  • health_check (Optional[HealthCheck]) – Configuration for health checks. Default: - HealthCheck.ec2 with no grace period

  • ignore_unmodified_size_properties (Optional[bool]) – If the ASG has scheduled actions, don’t reset unchanged group sizes. Only used if the ASG has scheduled actions (which may scale your ASG up or down regardless of cdk deployments). If true, the size of the group will only be reset if it has been changed in the CDK app. If false, the sizes will always be changed back to what they were in the CDK app on deployment. Default: true

  • instance_monitoring (Optional[Monitoring]) – Controls whether instances in this group are launched with detailed or basic monitoring. When detailed monitoring is enabled, Amazon CloudWatch generates metrics every minute and your account is charged a fee. When you disable detailed monitoring, CloudWatch generates metrics every 5 minutes. Default: - Monitoring.DETAILED

  • key_name (Optional[str]) – Name of SSH keypair to grant access to instances. Default: - No SSH access will be possible.

  • max_capacity (Union[int, float, None]) – Maximum number of instances in the fleet. Default: desiredCapacity

  • max_instance_lifetime (Optional[Duration]) – The maximum amount of time that an instance can be in service. The maximum duration applies to all current and future instances in the group. As an instance approaches its maximum duration, it is terminated and replaced, and cannot be used again. You must specify a value of at least 604,800 seconds (7 days). To clear a previously set value, leave this property undefined. Default: none

  • min_capacity (Union[int, float, None]) – Minimum number of instances in the fleet. Default: 1

  • new_instances_protected_from_scale_in (Optional[bool]) – Whether newly-launched instances are protected from termination by Amazon EC2 Auto Scaling when scaling in. By default, Auto Scaling can terminate an instance at any time after launch when scaling in an Auto Scaling Group, subject to the group’s termination policy. However, you may wish to protect newly-launched instances from being scaled in if they are going to run critical applications that should not be prematurely terminated. This flag must be enabled if the Auto Scaling Group will be associated with an ECS Capacity Provider with managed termination protection. Default: false

  • notifications (Optional[Sequence[Union[NotificationConfiguration, Dict[str, Any]]]]) – Configure autoscaling group to send notifications about fleet changes to an SNS topic(s). Default: - No fleet change notifications will be sent.

  • notifications_topic (Optional[ITopic]) – (deprecated) SNS topic to send notifications about fleet changes. Default: - No fleet change notifications will be sent.

  • replacing_update_min_successful_instances_percent (Union[int, float, None]) – (deprecated) Configuration for replacing updates. Only used if updateType == UpdateType.ReplacingUpdate. Specifies how many instances must signal success for the update to succeed. Default: minSuccessfulInstancesPercent

  • resource_signal_count (Union[int, float, None]) – (deprecated) How many ResourceSignal calls CloudFormation expects before the resource is considered created. Default: 1 if resourceSignalTimeout is set, 0 otherwise

  • resource_signal_timeout (Optional[Duration]) – (deprecated) The length of time to wait for the resourceSignalCount. The maximum value is 43200 (12 hours). Default: Duration.minutes(5) if resourceSignalCount is set, N/A otherwise

  • rolling_update_configuration (Union[RollingUpdateConfiguration, Dict[str, Any], None]) – (deprecated) Configuration for rolling updates. Only used if updateType == UpdateType.RollingUpdate. Default: - RollingUpdateConfiguration with defaults.

  • signals (Optional[Signals]) – Configure waiting for signals during deployment. Use this to pause the CloudFormation deployment to wait for the instances in the AutoScalingGroup to report successful startup during creation and updates. The UserData script needs to invoke cfn-signal with a success or failure code after it is done setting up the instance. Without waiting for signals, the CloudFormation deployment will proceed as soon as the AutoScalingGroup has been created or updated but before the instances in the group have been started. For example, to have instances wait for an Elastic Load Balancing health check before they signal success, add a health-check verification by using the cfn-init helper script. For an example, see the verify_instance_health command in the Auto Scaling rolling updates sample template: https://github.com/awslabs/aws-cloudformation-templates/blob/master/aws/services/AutoScaling/AutoScalingRollingUpdates.yaml Default: - Do not wait for signals

  • spot_price (Optional[str]) – The maximum hourly price (in USD) to be paid for any Spot Instance launched to fulfill the request. Spot Instances are launched when the price you specify exceeds the current Spot market price. Default: none

  • termination_policies (Optional[Sequence[TerminationPolicy]]) – A policy or a list of policies that are used to select the instances to terminate. The policies are executed in the order that you list them. Default: - TerminationPolicy.DEFAULT

  • update_policy (Optional[UpdatePolicy]) – What to do when an AutoScalingGroup’s instance configuration is changed. This is applied when any of the settings on the ASG are changed that affect how the instances should be created (VPC, instance type, startup scripts, etc.). It indicates how the existing instances should be replaced with new instances matching the new config. By default, nothing is done and only new instances are launched with the new config. Default: - UpdatePolicy.rollingUpdate() if using init, UpdatePolicy.none() otherwise

  • update_type (Optional[UpdateType]) – (deprecated) What to do when an AutoScalingGroup’s instance configuration is changed. This is applied when any of the settings on the ASG are changed that affect how the instances should be created (VPC, instance type, startup scripts, etc.). It indicates how the existing instances should be replaced with new instances matching the new config. By default, nothing is done and only new instances are launched with the new config. Default: UpdateType.None

  • vpc_subnets (Union[SubnetSelection, Dict[str, Any], None]) – Where to place instances within the VPC. Default: - All Private subnets.

  • instance_type (InstanceType) – Instance type of the instances to start.

  • bootstrap_enabled (Optional[bool]) – Configures the EC2 user-data script for instances in this autoscaling group to bootstrap the node (invoke /etc/eks/bootstrap.sh) and associate it with the EKS cluster. If you wish to provide a custom user data script, set this to false and manually invoke autoscalingGroup.addUserData(). Default: true

  • bootstrap_options (Union[BootstrapOptions, Dict[str, Any], None]) – EKS node bootstrapping options. Default: - none

  • machine_image_type (Optional[MachineImageType]) – Machine image type. Default: MachineImageType.AMAZON_LINUX_2

  • map_role (Optional[bool]) – Will automatically update the aws-auth ConfigMap to map the IAM instance role to RBAC. This cannot be explicitly set to true if the cluster has kubectl disabled. Default: - true if the cluster has kubectl enabled (which is the default).

  • spot_interrupt_handler (Optional[bool]) – Installs the AWS spot instance interrupt handler on the cluster if it’s not already added. Only relevant if spotPrice is used. Default: true

ExampleMetadata:

infused

Example:

# cluster: eks.Cluster

cluster.add_auto_scaling_group_capacity("BottlerocketNodes",
    instance_type=ec2.InstanceType("t3.small"),
    min_capacity=2,
    machine_image_type=eks.MachineImageType.BOTTLEROCKET
)

Attributes

allow_all_outbound

Whether the instances can initiate connections to anywhere by default.

Default:

true

associate_public_ip_address

Whether instances in the Auto Scaling Group should have public IP addresses associated with them.

Default:
  • Use subnet setting.

auto_scaling_group_name

The name of the Auto Scaling group.

This name must be unique per Region per account.

Default:
  • Auto generated by CloudFormation

block_devices

Specifies how block devices are exposed to the instance. You can specify virtual devices and EBS volumes.

Each instance that is launched has an associated root device volume, either an Amazon EBS volume or an instance store volume. You can use block device mappings to specify additional EBS volumes or instance store volumes to attach to an instance when it is launched.

Default:
  • Uses the block device mapping of the AMI

See:

https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/block-device-mapping-concepts.html

bootstrap_enabled

Configures the EC2 user-data script for instances in this autoscaling group to bootstrap the node (invoke /etc/eks/bootstrap.sh) and associate it with the EKS cluster.

If you wish to provide a custom user data script, set this to false and manually invoke autoscalingGroup.addUserData().

Default:

true

bootstrap_options

EKS node bootstrapping options.

Default:
  • none

cooldown

Default scaling cooldown for this AutoScalingGroup.

Default:

Duration.minutes(5)

desired_capacity

Initial amount of instances in the fleet.

If this is set to a number, every deployment will reset the amount of instances to this number. It is recommended to leave this value blank.

Default:

minCapacity, and leave unchanged during deployment

See:

https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-as-group.html#cfn-as-group-desiredcapacity

group_metrics

Enable monitoring for group metrics, these metrics describe the group rather than any of its instances.

To report all group metrics use GroupMetrics.all() Group metrics are reported in a granularity of 1 minute at no additional charge.

Default:
  • no group metrics will be reported

health_check

Configuration for health checks.

Default:
  • HealthCheck.ec2 with no grace period

ignore_unmodified_size_properties

If the ASG has scheduled actions, don’t reset unchanged group sizes.

Only used if the ASG has scheduled actions (which may scale your ASG up or down regardless of cdk deployments). If true, the size of the group will only be reset if it has been changed in the CDK app. If false, the sizes will always be changed back to what they were in the CDK app on deployment.

Default:

true

instance_monitoring

Controls whether instances in this group are launched with detailed or basic monitoring.

When detailed monitoring is enabled, Amazon CloudWatch generates metrics every minute and your account is charged a fee. When you disable detailed monitoring, CloudWatch generates metrics every 5 minutes.

Default:
  • Monitoring.DETAILED

See:

https://docs.aws.amazon.com/autoscaling/latest/userguide/as-instance-monitoring.html#enable-as-instance-metrics

instance_type

Instance type of the instances to start.

key_name

Name of SSH keypair to grant access to instances.

Default:
  • No SSH access will be possible.

machine_image_type

Machine image type.

Default:

MachineImageType.AMAZON_LINUX_2

map_role

Will automatically update the aws-auth ConfigMap to map the IAM instance role to RBAC.

This cannot be explicitly set to true if the cluster has kubectl disabled.

Default:
  • true if the cluster has kubectl enabled (which is the default).

max_capacity

Maximum number of instances in the fleet.

Default:

desiredCapacity

max_instance_lifetime

The maximum amount of time that an instance can be in service.

The maximum duration applies to all current and future instances in the group. As an instance approaches its maximum duration, it is terminated and replaced, and cannot be used again.

You must specify a value of at least 604,800 seconds (7 days). To clear a previously set value, leave this property undefined.

Default:

none

See:

https://docs.aws.amazon.com/autoscaling/ec2/userguide/asg-max-instance-lifetime.html

min_capacity

Minimum number of instances in the fleet.

Default:

1

new_instances_protected_from_scale_in

Whether newly-launched instances are protected from termination by Amazon EC2 Auto Scaling when scaling in.

By default, Auto Scaling can terminate an instance at any time after launch when scaling in an Auto Scaling Group, subject to the group’s termination policy. However, you may wish to protect newly-launched instances from being scaled in if they are going to run critical applications that should not be prematurely terminated.

This flag must be enabled if the Auto Scaling Group will be associated with an ECS Capacity Provider with managed termination protection.

Default:

false

notifications

Configure autoscaling group to send notifications about fleet changes to an SNS topic(s).

Default:
  • No fleet change notifications will be sent.

See:

https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-as-group.html#cfn-as-group-notificationconfigurations

notifications_topic

(deprecated) SNS topic to send notifications about fleet changes.

Default:
  • No fleet change notifications will be sent.

Deprecated:

use notifications

Stability:

deprecated

replacing_update_min_successful_instances_percent

(deprecated) Configuration for replacing updates.

Only used if updateType == UpdateType.ReplacingUpdate. Specifies how many instances must signal success for the update to succeed.

Default:

minSuccessfulInstancesPercent

Deprecated:

Use signals instead

Stability:

deprecated

resource_signal_count

(deprecated) How many ResourceSignal calls CloudFormation expects before the resource is considered created.

Default:

1 if resourceSignalTimeout is set, 0 otherwise

Deprecated:

Use signals instead.

Stability:

deprecated

resource_signal_timeout

(deprecated) The length of time to wait for the resourceSignalCount.

The maximum value is 43200 (12 hours).

Default:

Duration.minutes(5) if resourceSignalCount is set, N/A otherwise

Deprecated:

Use signals instead.

Stability:

deprecated

rolling_update_configuration

(deprecated) Configuration for rolling updates.

Only used if updateType == UpdateType.RollingUpdate.

Default:
  • RollingUpdateConfiguration with defaults.

Deprecated:

Use updatePolicy instead

Stability:

deprecated

signals

Configure waiting for signals during deployment.

Use this to pause the CloudFormation deployment to wait for the instances in the AutoScalingGroup to report successful startup during creation and updates. The UserData script needs to invoke cfn-signal with a success or failure code after it is done setting up the instance.

Without waiting for signals, the CloudFormation deployment will proceed as soon as the AutoScalingGroup has been created or updated but before the instances in the group have been started.

For example, to have instances wait for an Elastic Load Balancing health check before they signal success, add a health-check verification by using the cfn-init helper script. For an example, see the verify_instance_health command in the Auto Scaling rolling updates sample template:

https://github.com/awslabs/aws-cloudformation-templates/blob/master/aws/services/AutoScaling/AutoScalingRollingUpdates.yaml

Default:
  • Do not wait for signals

spot_interrupt_handler

Installs the AWS spot instance interrupt handler on the cluster if it’s not already added.

Only relevant if spotPrice is used.

Default:

true

spot_price

The maximum hourly price (in USD) to be paid for any Spot Instance launched to fulfill the request.

Spot Instances are launched when the price you specify exceeds the current Spot market price.

Default:

none

termination_policies

A policy or a list of policies that are used to select the instances to terminate.

The policies are executed in the order that you list them.

Default:
  • TerminationPolicy.DEFAULT

See:

https://docs.aws.amazon.com/autoscaling/ec2/userguide/as-instance-termination.html

update_policy

What to do when an AutoScalingGroup’s instance configuration is changed.

This is applied when any of the settings on the ASG are changed that affect how the instances should be created (VPC, instance type, startup scripts, etc.). It indicates how the existing instances should be replaced with new instances matching the new config. By default, nothing is done and only new instances are launched with the new config.

Default:
  • UpdatePolicy.rollingUpdate() if using init, UpdatePolicy.none() otherwise

update_type

(deprecated) What to do when an AutoScalingGroup’s instance configuration is changed.

This is applied when any of the settings on the ASG are changed that affect how the instances should be created (VPC, instance type, startup scripts, etc.). It indicates how the existing instances should be replaced with new instances matching the new config. By default, nothing is done and only new instances are launched with the new config.

Default:

UpdateType.None

Deprecated:

Use updatePolicy instead

Stability:

deprecated

vpc_subnets

Where to place instances within the VPC.

Default:
  • All Private subnets.