CfnWarmPoolProps

class aws_cdk.aws_autoscaling.CfnWarmPoolProps(*, auto_scaling_group_name, instance_reuse_policy=None, max_group_prepared_capacity=None, min_size=None, pool_state=None)

Bases: object

Properties for defining a CfnWarmPool.

Parameters:

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

  • instance_reuse_policy (Union[IResolvable, InstanceReusePolicyProperty, Dict[str, Any], None]) – Indicates whether instances in the Auto Scaling group can be returned to the warm pool on scale in. The default is to terminate instances in the Auto Scaling group when the group scales in.

  • max_group_prepared_capacity (Union[int, float, None]) – Specifies the maximum number of instances that are allowed to be in the warm pool or in any state except Terminated for the Auto Scaling group. This is an optional property. Specify it only if you do not want the warm pool size to be determined by the difference between the group’s maximum capacity and its desired capacity. .. epigraph:: If a value for MaxGroupPreparedCapacity is not specified, Amazon EC2 Auto Scaling launches and maintains the difference between the group’s maximum capacity and its desired capacity. If you specify a value for MaxGroupPreparedCapacity , Amazon EC2 Auto Scaling uses the difference between the MaxGroupPreparedCapacity and the desired capacity instead. The size of the warm pool is dynamic. Only when MaxGroupPreparedCapacity and MinSize are set to the same value does the warm pool have an absolute size. If the desired capacity of the Auto Scaling group is higher than the MaxGroupPreparedCapacity , the capacity of the warm pool is 0, unless you specify a value for MinSize . To remove a value that you previously set, include the property but specify -1 for the value.

  • min_size (Union[int, float, None]) – Specifies the minimum number of instances to maintain in the warm pool. This helps you to ensure that there is always a certain number of warmed instances available to handle traffic spikes. Defaults to 0 if not specified.

  • pool_state (Optional[str]) – Sets the instance state to transition to after the lifecycle actions are complete. Default is Stopped .

Link:

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-autoscaling-warmpool.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_warm_pool_props = autoscaling.CfnWarmPoolProps(
    auto_scaling_group_name="autoScalingGroupName",

    # the properties below are optional
    instance_reuse_policy=autoscaling.CfnWarmPool.InstanceReusePolicyProperty(
        reuse_on_scale_in=False
    ),
    max_group_prepared_capacity=123,
    min_size=123,
    pool_state="poolState"
)

Attributes

auto_scaling_group_name

The name of the Auto Scaling group.

Link:

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

instance_reuse_policy

Indicates whether instances in the Auto Scaling group can be returned to the warm pool on scale in.

The default is to terminate instances in the Auto Scaling group when the group scales in.

Link:

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

max_group_prepared_capacity

Specifies the maximum number of instances that are allowed to be in the warm pool or in any state except Terminated for the Auto Scaling group.

This is an optional property. Specify it only if you do not want the warm pool size to be determined by the difference between the group’s maximum capacity and its desired capacity. .. epigraph:

If a value for ``MaxGroupPreparedCapacity`` is not specified, Amazon EC2 Auto Scaling launches and maintains the difference between the group's maximum capacity and its desired capacity. If you specify a value for ``MaxGroupPreparedCapacity`` , Amazon EC2 Auto Scaling uses the difference between the ``MaxGroupPreparedCapacity`` and the desired capacity instead.

The size of the warm pool is dynamic. Only when ``MaxGroupPreparedCapacity`` and ``MinSize`` are set to the same value does the warm pool have an absolute size.

If the desired capacity of the Auto Scaling group is higher than the MaxGroupPreparedCapacity , the capacity of the warm pool is 0, unless you specify a value for MinSize . To remove a value that you previously set, include the property but specify -1 for the value.

Link:

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

min_size

Specifies the minimum number of instances to maintain in the warm pool.

This helps you to ensure that there is always a certain number of warmed instances available to handle traffic spikes. Defaults to 0 if not specified.

Link:

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

pool_state

Sets the instance state to transition to after the lifecycle actions are complete.

Default is Stopped .

Link:

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