CfnAutoScalingGroupProps¶

class aws_cdk.aws_autoscaling.CfnAutoScalingGroupProps(*, max_size, min_size, auto_scaling_group_name=None, availability_zones=None, capacity_rebalance=None, context=None, cooldown=None, default_instance_warmup=None, desired_capacity=None, desired_capacity_type=None, health_check_grace_period=None, health_check_type=None, instance_id=None, launch_configuration_name=None, launch_template=None, lifecycle_hook_specification_list=None, load_balancer_names=None, max_instance_lifetime=None, metrics_collection=None, mixed_instances_policy=None, new_instances_protected_from_scale_in=None, notification_configurations=None, placement_group=None, service_linked_role_arn=None, tags=None, target_group_arns=None, termination_policies=None, vpc_zone_identifier=None)¶

Bases: object

Properties for defining a CfnAutoScalingGroup.

Parameters

max_size (str) – The maximum size of the group. .. epigraph:: With a mixed instances policy that uses instance weighting, Amazon EC2 Auto Scaling may need to go above MaxSize to meet your capacity requirements. In this event, Amazon EC2 Auto Scaling will never go above MaxSize by more than your largest instance weight (weights that define how many units each instance contributes to the desired capacity of the group).
min_size (str) – The minimum size of the group.
auto_scaling_group_name (Optional[str]) – The name of the Auto Scaling group. This name must be unique per Region per account.
availability_zones (Optional[Sequence[str]]) – A list of Availability Zones where instances in the Auto Scaling group can be created. Used for launching into EC2-Classic or the default VPC subnet in each Availability Zone when not using the VPCZoneIdentifier property, or for attaching a network interface when an existing network interface ID is specified in a launch template.
capacity_rebalance (Union[bool, IResolvable, None]) – Indicates whether Capacity Rebalancing is enabled. Otherwise, Capacity Rebalancing is disabled. When you turn on Capacity Rebalancing, Amazon EC2 Auto Scaling attempts to launch a Spot Instance whenever Amazon EC2 notifies that a Spot Instance is at an elevated risk of interruption. After launching a new instance, it then terminates an old instance. For more information, see Use Capacity Rebalancing to handle Amazon EC2 Spot Interruptions in the in the Amazon EC2 Auto Scaling User Guide .
context (Optional[str]) – Reserved.
cooldown (Optional[str]) – Only needed if you use simple scaling policies.. The amount of time, in seconds, between one scaling activity ending and another one starting due to simple scaling policies. For more information, see Scaling cooldowns for Amazon EC2 Auto Scaling in the Amazon EC2 Auto Scaling User Guide . Default: 300 seconds
default_instance_warmup (Union[int, float, None]) – Not currently supported by CloudFormation.
desired_capacity (Optional[str]) – The desired capacity is the initial capacity of the Auto Scaling group at the time of its creation and the capacity it attempts to maintain. It can scale beyond this capacity if you configure automatic scaling. The number must be greater than or equal to the minimum size of the group and less than or equal to the maximum size of the group. If you do not specify a desired capacity when creating the stack, the default is the minimum size of the group. CloudFormation marks the Auto Scaling group as successful (by setting its status to CREATE_COMPLETE) when the desired capacity is reached. However, if a maximum Spot price is set in the launch template or launch configuration that you specified, then desired capacity is not used as a criteria for success. Whether your request is fulfilled depends on Spot Instance capacity and your maximum price.
desired_capacity_type (Optional[str]) – The unit of measurement for the value specified for desired capacity. Amazon EC2 Auto Scaling supports DesiredCapacityType for attribute-based instance type selection only. For more information, see Creating an Auto Scaling group using attribute-based instance type selection in the Amazon EC2 Auto Scaling User Guide . By default, Amazon EC2 Auto Scaling specifies units , which translates into number of instances. Valid values: units | vcpu | memory-mib
health_check_grace_period (Union[int, float, None]) – The amount of time, in seconds, that Amazon EC2 Auto Scaling waits before checking the health status of an EC2 instance that has come into service and marking it unhealthy due to a failed Elastic Load Balancing or custom health check. This is useful if your instances do not immediately pass these health checks after they enter the InService state. For more information, see Health check grace period in the Amazon EC2 Auto Scaling User Guide . Default: 0 seconds
health_check_type (Optional[str]) – The service to use for the health checks. The valid values are EC2 (default) and ELB . If you configure an Auto Scaling group to use load balancer (ELB) health checks, it considers the instance unhealthy if it fails either the EC2 status checks or the load balancer health checks. For more information, see Health checks for Auto Scaling instances in the Amazon EC2 Auto Scaling User Guide .
instance_id (Optional[str]) – The ID of the instance used to base the launch configuration on. For more information, see Create an Auto Scaling group using an EC2 instance in the Amazon EC2 Auto Scaling User Guide . If you specify LaunchTemplate , MixedInstancesPolicy , or LaunchConfigurationName , don’t specify InstanceId .
launch_configuration_name (Optional[str]) – The name of the launch configuration to use to launch instances. Required only if you don’t specify LaunchTemplate , MixedInstancesPolicy , or InstanceId .
launch_template (Union[IResolvable, LaunchTemplateSpecificationProperty, Dict[str, Any], None]) – Information used to specify the launch template and version to use to launch instances. You can alternatively associate a launch template to the Auto Scaling group by specifying a MixedInstancesPolicy . For more information about creating launch templates, see Create a launch template for an Auto Scaling group in the Amazon EC2 Auto Scaling User Guide . If you omit this property, you must specify MixedInstancesPolicy , LaunchConfigurationName , or InstanceId .
lifecycle_hook_specification_list (Union[IResolvable, Sequence[Union[IResolvable, LifecycleHookSpecificationProperty, Dict[str, Any]]], None]) – One or more lifecycle hooks to add to the Auto Scaling group before instances are launched.
load_balancer_names (Optional[Sequence[str]]) – A list of Classic Load Balancers associated with this Auto Scaling group. For Application Load Balancers, Network Load Balancers, and Gateway Load Balancers, specify the TargetGroupARNs property instead.
max_instance_lifetime (Union[int, float, None]) – The maximum amount of time, in seconds, that an instance can be in service. The default is null. If specified, the value must be either 0 or a number equal to or greater than 86,400 seconds (1 day). For more information, see Replacing Auto Scaling instances based on maximum instance lifetime in the Amazon EC2 Auto Scaling User Guide .
metrics_collection (Union[IResolvable, Sequence[Union[IResolvable, MetricsCollectionProperty, Dict[str, Any]]], None]) – Enables the monitoring of group metrics of an Auto Scaling group. By default, these metrics are disabled.
mixed_instances_policy (Union[IResolvable, MixedInstancesPolicyProperty, Dict[str, Any], None]) – An embedded object that specifies a mixed instances policy. The policy includes properties that not only define the distribution of On-Demand Instances and Spot Instances, the maximum price to pay for Spot Instances (optional), and how the Auto Scaling group allocates instance types to fulfill On-Demand and Spot capacities, but also the properties that specify the instance configuration information—the launch template and instance types. The policy can also include a weight for each instance type and different launch templates for individual instance types. For more information, see Auto Scaling groups with multiple instance types and purchase options in the Amazon EC2 Auto Scaling User Guide .
new_instances_protected_from_scale_in (Union[bool, IResolvable, None]) – Indicates whether newly launched instances are protected from termination by Amazon EC2 Auto Scaling when scaling in. For more information about preventing instances from terminating on scale in, see Using instance scale-in protection in the Amazon EC2 Auto Scaling User Guide .
notification_configurations (Union[IResolvable, Sequence[Union[IResolvable, NotificationConfigurationProperty, Dict[str, Any]]], None]) – Configures an Auto Scaling group to send notifications when specified events take place.
placement_group (Optional[str]) – The name of the placement group into which to launch your instances. For more information, see Placement groups in the Amazon EC2 User Guide for Linux Instances . .. epigraph:: A cluster placement group is a logical grouping of instances within a single Availability Zone. You cannot specify multiple Availability Zones and a cluster placement group.
service_linked_role_arn (Optional[str]) – The Amazon Resource Name (ARN) of the service-linked role that the Auto Scaling group uses to call other AWS service on your behalf. By default, Amazon EC2 Auto Scaling uses a service-linked role named AWSServiceRoleForAutoScaling , which it creates if it does not exist. For more information, see Service-linked roles in the Amazon EC2 Auto Scaling User Guide .
tags (Optional[Sequence[Union[TagPropertyProperty, Dict[str, Any]]]]) – One or more tags. You can tag your Auto Scaling group and propagate the tags to the Amazon EC2 instances it launches. Tags are not propagated to Amazon EBS volumes. To add tags to Amazon EBS volumes, specify the tags in a launch template but use caution. If the launch template specifies an instance tag with a key that is also specified for the Auto Scaling group, Amazon EC2 Auto Scaling overrides the value of that instance tag with the value specified by the Auto Scaling group. For more information, see Tag Auto Scaling groups and instances in the Amazon EC2 Auto Scaling User Guide .
target_group_arns (Optional[Sequence[str]]) – The Amazon Resource Names (ARN) of the target groups to associate with the Auto Scaling group. Instances are registered as targets in a target group, and traffic is routed to the target group. For more information, see Elastic Load Balancing and Amazon EC2 Auto Scaling in the Amazon EC2 Auto Scaling User Guide .
termination_policies (Optional[Sequence[str]]) – A policy or a list of policies that are used to select the instance to terminate. These policies are executed in the order that you list them. For more information, see Work with Amazon EC2 Auto Scaling termination policies in the Amazon EC2 Auto Scaling User Guide . Valid values: Default | AllocationStrategy | ClosestToNextInstanceHour | NewestInstance | OldestInstance | OldestLaunchConfiguration | OldestLaunchTemplate | arn:aws:lambda:region:account-id:function:my-function:my-alias
vpc_zone_identifier (Optional[Sequence[str]]) – A list of subnet IDs for a virtual private cloud (VPC) where instances in the Auto Scaling group can be created. If you specify VPCZoneIdentifier with AvailabilityZones , the subnets that you specify for this property must reside in those Availability Zones. If this resource specifies public subnets and is also in a VPC that is defined in the same stack template, you must use the DependsOn attribute to declare a dependency on the VPC-gateway attachment . Conditional: If your account supports EC2-Classic and VPC, this property is required to launch instances into a VPC. .. epigraph:: When you update VPCZoneIdentifier , this retains the same Auto Scaling group and replaces old instances with new ones, according to the specified subnets. You can optionally specify how CloudFormation handles these updates by using an UpdatePolicy attribute .

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-as-group.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_auto_scaling_group_props = autoscaling.CfnAutoScalingGroupProps(
    max_size="maxSize",
    min_size="minSize",

    # the properties below are optional
    auto_scaling_group_name="autoScalingGroupName",
    availability_zones=["availabilityZones"],
    capacity_rebalance=False,
    context="context",
    cooldown="cooldown",
    default_instance_warmup=123,
    desired_capacity="desiredCapacity",
    desired_capacity_type="desiredCapacityType",
    health_check_grace_period=123,
    health_check_type="healthCheckType",
    instance_id="instanceId",
    launch_configuration_name="launchConfigurationName",
    launch_template=autoscaling.CfnAutoScalingGroup.LaunchTemplateSpecificationProperty(
        version="version",

        # the properties below are optional
        launch_template_id="launchTemplateId",
        launch_template_name="launchTemplateName"
    ),
    lifecycle_hook_specification_list=[autoscaling.CfnAutoScalingGroup.LifecycleHookSpecificationProperty(
        lifecycle_hook_name="lifecycleHookName",
        lifecycle_transition="lifecycleTransition",

        # the properties below are optional
        default_result="defaultResult",
        heartbeat_timeout=123,
        notification_metadata="notificationMetadata",
        notification_target_arn="notificationTargetArn",
        role_arn="roleArn"
    )],
    load_balancer_names=["loadBalancerNames"],
    max_instance_lifetime=123,
    metrics_collection=[autoscaling.CfnAutoScalingGroup.MetricsCollectionProperty(
        granularity="granularity",

        # the properties below are optional
        metrics=["metrics"]
    )],
    mixed_instances_policy=autoscaling.CfnAutoScalingGroup.MixedInstancesPolicyProperty(
        launch_template=autoscaling.CfnAutoScalingGroup.LaunchTemplateProperty(
            launch_template_specification=autoscaling.CfnAutoScalingGroup.LaunchTemplateSpecificationProperty(
                version="version",

                # the properties below are optional
                launch_template_id="launchTemplateId",
                launch_template_name="launchTemplateName"
            ),

            # the properties below are optional
            overrides=[autoscaling.CfnAutoScalingGroup.LaunchTemplateOverridesProperty(
                instance_requirements=autoscaling.CfnAutoScalingGroup.InstanceRequirementsProperty(
                    accelerator_count=autoscaling.CfnAutoScalingGroup.AcceleratorCountRequestProperty(
                        max=123,
                        min=123
                    ),
                    accelerator_manufacturers=["acceleratorManufacturers"],
                    accelerator_names=["acceleratorNames"],
                    accelerator_total_memory_mi_b=autoscaling.CfnAutoScalingGroup.AcceleratorTotalMemoryMiBRequestProperty(
                        max=123,
                        min=123
                    ),
                    accelerator_types=["acceleratorTypes"],
                    bare_metal="bareMetal",
                    baseline_ebs_bandwidth_mbps=autoscaling.CfnAutoScalingGroup.BaselineEbsBandwidthMbpsRequestProperty(
                        max=123,
                        min=123
                    ),
                    burstable_performance="burstablePerformance",
                    cpu_manufacturers=["cpuManufacturers"],
                    excluded_instance_types=["excludedInstanceTypes"],
                    instance_generations=["instanceGenerations"],
                    local_storage="localStorage",
                    local_storage_types=["localStorageTypes"],
                    memory_gi_bPer_vCpu=autoscaling.CfnAutoScalingGroup.MemoryGiBPerVCpuRequestProperty(
                        max=123,
                        min=123
                    ),
                    memory_mi_b=autoscaling.CfnAutoScalingGroup.MemoryMiBRequestProperty(
                        max=123,
                        min=123
                    ),
                    network_interface_count=autoscaling.CfnAutoScalingGroup.NetworkInterfaceCountRequestProperty(
                        max=123,
                        min=123
                    ),
                    on_demand_max_price_percentage_over_lowest_price=123,
                    require_hibernate_support=False,
                    spot_max_price_percentage_over_lowest_price=123,
                    total_local_storage_gb=autoscaling.CfnAutoScalingGroup.TotalLocalStorageGBRequestProperty(
                        max=123,
                        min=123
                    ),
                    v_cpu_count=autoscaling.CfnAutoScalingGroup.VCpuCountRequestProperty(
                        max=123,
                        min=123
                    )
                ),
                instance_type="instanceType",
                launch_template_specification=autoscaling.CfnAutoScalingGroup.LaunchTemplateSpecificationProperty(
                    version="version",

                    # the properties below are optional
                    launch_template_id="launchTemplateId",
                    launch_template_name="launchTemplateName"
                ),
                weighted_capacity="weightedCapacity"
            )]
        ),

        # the properties below are optional
        instances_distribution=autoscaling.CfnAutoScalingGroup.InstancesDistributionProperty(
            on_demand_allocation_strategy="onDemandAllocationStrategy",
            on_demand_base_capacity=123,
            on_demand_percentage_above_base_capacity=123,
            spot_allocation_strategy="spotAllocationStrategy",
            spot_instance_pools=123,
            spot_max_price="spotMaxPrice"
        )
    ),
    new_instances_protected_from_scale_in=False,
    notification_configurations=[autoscaling.CfnAutoScalingGroup.NotificationConfigurationProperty(
        topic_arn="topicArn",

        # the properties below are optional
        notification_types=["notificationTypes"]
    )],
    placement_group="placementGroup",
    service_linked_role_arn="serviceLinkedRoleArn",
    tags=[autoscaling.CfnAutoScalingGroup.TagPropertyProperty(
        key="key",
        propagate_at_launch=False,
        value="value"
    )],
    target_group_arns=["targetGroupArns"],
    termination_policies=["terminationPolicies"],
    vpc_zone_identifier=["vpcZoneIdentifier"]
)

Attributes

auto_scaling_group_name¶

The name of the Auto Scaling group.

This name must be unique per Region per account.

Link: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-as-group.html#cfn-autoscaling-autoscalinggroup-autoscalinggroupname
Return type: Optional[str]

availability_zones¶

A list of Availability Zones where instances in the Auto Scaling group can be created.

Used for launching into EC2-Classic or the default VPC subnet in each Availability Zone when not using the VPCZoneIdentifier property, or for attaching a network interface when an existing network interface ID is specified in a launch template.

Link: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-as-group.html#cfn-as-group-availabilityzones
Return type: Optional[List[str]]

capacity_rebalance¶

Indicates whether Capacity Rebalancing is enabled.

Otherwise, Capacity Rebalancing is disabled. When you turn on Capacity Rebalancing, Amazon EC2 Auto Scaling attempts to launch a Spot Instance whenever Amazon EC2 notifies that a Spot Instance is at an elevated risk of interruption. After launching a new instance, it then terminates an old instance. For more information, see Use Capacity Rebalancing to handle Amazon EC2 Spot Interruptions in the in the Amazon EC2 Auto Scaling User Guide .

Link: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-as-group.html#cfn-as-group-capacityrebalance
Return type: Union[bool, IResolvable, None]

context¶

Reserved.

Link: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-as-group.html#cfn-as-group-context
Return type: Optional[str]

cooldown¶

Only needed if you use simple scaling policies..

The amount of time, in seconds, between one scaling activity ending and another one starting due to simple scaling policies. For more information, see Scaling cooldowns for Amazon EC2 Auto Scaling in the Amazon EC2 Auto Scaling User Guide .

Default: 300 seconds

Link: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-as-group.html#cfn-as-group-cooldown
Return type: Optional[str]

default_instance_warmup¶

Not currently supported by CloudFormation.

Link: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-as-group.html#cfn-as-group-defaultinstancewarmup
Return type: Union[int, float, None]

desired_capacity¶

The desired capacity is the initial capacity of the Auto Scaling group at the time of its creation and the capacity it attempts to maintain.

It can scale beyond this capacity if you configure automatic scaling.

The number must be greater than or equal to the minimum size of the group and less than or equal to the maximum size of the group. If you do not specify a desired capacity when creating the stack, the default is the minimum size of the group.

CloudFormation marks the Auto Scaling group as successful (by setting its status to CREATE_COMPLETE) when the desired capacity is reached. However, if a maximum Spot price is set in the launch template or launch configuration that you specified, then desired capacity is not used as a criteria for success. Whether your request is fulfilled depends on Spot Instance capacity and your maximum price.

Link: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-as-group.html#cfn-as-group-desiredcapacity
Return type: Optional[str]

desired_capacity_type¶

The unit of measurement for the value specified for desired capacity.

Amazon EC2 Auto Scaling supports DesiredCapacityType for attribute-based instance type selection only. For more information, see Creating an Auto Scaling group using attribute-based instance type selection in the Amazon EC2 Auto Scaling User Guide .

By default, Amazon EC2 Auto Scaling specifies units , which translates into number of instances.

Valid values: units | vcpu | memory-mib

Link: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-as-group.html#cfn-as-group-desiredcapacitytype
Return type: Optional[str]

health_check_grace_period¶

The amount of time, in seconds, that Amazon EC2 Auto Scaling waits before checking the health status of an EC2 instance that has come into service and marking it unhealthy due to a failed Elastic Load Balancing or custom health check.

This is useful if your instances do not immediately pass these health checks after they enter the InService state. For more information, see Health check grace period in the Amazon EC2 Auto Scaling User Guide .

Default: 0 seconds

Link: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-as-group.html#cfn-as-group-healthcheckgraceperiod
Return type: Union[int, float, None]

health_check_type¶

The service to use for the health checks.

The valid values are EC2 (default) and ELB . If you configure an Auto Scaling group to use load balancer (ELB) health checks, it considers the instance unhealthy if it fails either the EC2 status checks or the load balancer health checks. For more information, see Health checks for Auto Scaling instances in the Amazon EC2 Auto Scaling User Guide .

Link: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-as-group.html#cfn-as-group-healthchecktype
Return type: Optional[str]

instance_id¶

The ID of the instance used to base the launch configuration on.

For more information, see Create an Auto Scaling group using an EC2 instance in the Amazon EC2 Auto Scaling User Guide .

If you specify LaunchTemplate , MixedInstancesPolicy , or LaunchConfigurationName , don’t specify InstanceId .

Link: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-as-group.html#cfn-as-group-instanceid
Return type: Optional[str]

launch_configuration_name¶

The name of the launch configuration to use to launch instances.

Required only if you don’t specify LaunchTemplate , MixedInstancesPolicy , or InstanceId .

Link: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-as-group.html#cfn-as-group-launchconfigurationname
Return type: Optional[str]

launch_template¶

Information used to specify the launch template and version to use to launch instances.

You can alternatively associate a launch template to the Auto Scaling group by specifying a MixedInstancesPolicy . For more information about creating launch templates, see Create a launch template for an Auto Scaling group in the Amazon EC2 Auto Scaling User Guide .

If you omit this property, you must specify MixedInstancesPolicy , LaunchConfigurationName , or InstanceId .

Link: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-as-group.html#cfn-as-group-launchtemplate
Return type: Union[IResolvable, LaunchTemplateSpecificationProperty, None]

lifecycle_hook_specification_list¶

One or more lifecycle hooks to add to the Auto Scaling group before instances are launched.

Link: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-as-group.html#cfn-autoscaling-autoscalinggroup-lifecyclehookspecificationlist
Return type: Union[IResolvable, List[Union[IResolvable, LifecycleHookSpecificationProperty]], None]

load_balancer_names¶

A list of Classic Load Balancers associated with this Auto Scaling group.

For Application Load Balancers, Network Load Balancers, and Gateway Load Balancers, specify the TargetGroupARNs property instead.

Link: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-as-group.html#cfn-as-group-loadbalancernames
Return type: Optional[List[str]]

max_instance_lifetime¶

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

The default is null. If specified, the value must be either 0 or a number equal to or greater than 86,400 seconds (1 day). For more information, see Replacing Auto Scaling instances based on maximum instance lifetime in the Amazon EC2 Auto Scaling User Guide .

Link: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-as-group.html#cfn-as-group-maxinstancelifetime
Return type: Union[int, float, None]

max_size¶

The maximum size of the group.

With a mixed instances policy that uses instance weighting, Amazon EC2 Auto Scaling may need to go above MaxSize to meet your capacity requirements. In this event, Amazon EC2 Auto Scaling will never go above MaxSize by more than your largest instance weight (weights that define how many units each instance contributes to the desired capacity of the group).

Link: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-as-group.html#cfn-as-group-maxsize
Return type: str

metrics_collection¶

Enables the monitoring of group metrics of an Auto Scaling group.

By default, these metrics are disabled.

Link: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-as-group.html#cfn-as-group-metricscollection
Return type: Union[IResolvable, List[Union[IResolvable, MetricsCollectionProperty]], None]

min_size¶

The minimum size of the group.

Link: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-as-group.html#cfn-as-group-minsize
Return type: str

mixed_instances_policy¶

An embedded object that specifies a mixed instances policy.

The policy includes properties that not only define the distribution of On-Demand Instances and Spot Instances, the maximum price to pay for Spot Instances (optional), and how the Auto Scaling group allocates instance types to fulfill On-Demand and Spot capacities, but also the properties that specify the instance configuration information—the launch template and instance types. The policy can also include a weight for each instance type and different launch templates for individual instance types.

For more information, see Auto Scaling groups with multiple instance types and purchase options in the Amazon EC2 Auto Scaling User Guide .

Link: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-as-group.html#cfn-as-group-mixedinstancespolicy
Return type: Union[IResolvable, MixedInstancesPolicyProperty, None]

new_instances_protected_from_scale_in¶

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

For more information about preventing instances from terminating on scale in, see Using instance scale-in protection in the Amazon EC2 Auto Scaling User Guide .

Link: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-as-group.html#cfn-as-group-newinstancesprotectedfromscalein
Return type: Union[bool, IResolvable, None]

notification_configurations¶

Configures an Auto Scaling group to send notifications when specified events take place.

Link: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-as-group.html#cfn-as-group-notificationconfigurations
Return type: Union[IResolvable, List[Union[IResolvable, NotificationConfigurationProperty]], None]

placement_group¶

The name of the placement group into which to launch your instances.

For more information, see Placement groups in the Amazon EC2 User Guide for Linux Instances . .. epigraph:

A *cluster* placement group is a logical grouping of instances within a single Availability Zone. You cannot specify multiple Availability Zones and a cluster placement group.

Link: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-as-group.html#cfn-as-group-placementgroup
Return type: Optional[str]

service_linked_role_arn¶

The Amazon Resource Name (ARN) of the service-linked role that the Auto Scaling group uses to call other AWS service on your behalf.

By default, Amazon EC2 Auto Scaling uses a service-linked role named AWSServiceRoleForAutoScaling , which it creates if it does not exist. For more information, see Service-linked roles in the Amazon EC2 Auto Scaling User Guide .

Link: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-as-group.html#cfn-autoscaling-autoscalinggroup-servicelinkedrolearn
Return type: Optional[str]

tags¶

One or more tags.

You can tag your Auto Scaling group and propagate the tags to the Amazon EC2 instances it launches. Tags are not propagated to Amazon EBS volumes. To add tags to Amazon EBS volumes, specify the tags in a launch template but use caution. If the launch template specifies an instance tag with a key that is also specified for the Auto Scaling group, Amazon EC2 Auto Scaling overrides the value of that instance tag with the value specified by the Auto Scaling group. For more information, see Tag Auto Scaling groups and instances in the Amazon EC2 Auto Scaling User Guide .

Link: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-as-group.html#cfn-as-group-tags
Return type: Optional[List[TagPropertyProperty]]

target_group_arns¶

The Amazon Resource Names (ARN) of the target groups to associate with the Auto Scaling group.

Instances are registered as targets in a target group, and traffic is routed to the target group. For more information, see Elastic Load Balancing and Amazon EC2 Auto Scaling in the Amazon EC2 Auto Scaling User Guide .

Link: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-as-group.html#cfn-as-group-targetgrouparns
Return type: Optional[List[str]]

termination_policies¶

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

These policies are executed in the order that you list them. For more information, see Work with Amazon EC2 Auto Scaling termination policies in the Amazon EC2 Auto Scaling User Guide .

Link: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-as-group.html#cfn-as-group-termpolicy
Return type: Optional[List[str]]

vpc_zone_identifier¶

A list of subnet IDs for a virtual private cloud (VPC) where instances in the Auto Scaling group can be created.

If you specify VPCZoneIdentifier with AvailabilityZones , the subnets that you specify for this property must reside in those Availability Zones.

If this resource specifies public subnets and is also in a VPC that is defined in the same stack template, you must use the DependsOn attribute to declare a dependency on the VPC-gateway attachment .

Conditional: If your account supports EC2-Classic and VPC, this property is required to launch instances into a VPC. .. epigraph:

When you update ``VPCZoneIdentifier`` , this retains the same Auto Scaling group and replaces old instances with new ones, according to the specified subnets. You can optionally specify how CloudFormation handles these updates by using an `UpdatePolicy attribute <https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-attribute-updatepolicy.html>`_ .

Link: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-as-group.html#cfn-as-group-vpczoneidentifier
Return type: Optional[List[str]]