AWS::EC2::SpotFleet SpotFleetRequestConfigData

Specifies the configuration of a Spot Fleet request. For more information, see Spot Fleet in the Amazon EC2 User Guide.

You must specify either LaunchSpecifications or LaunchTemplateConfigs.

Syntax

To declare this entity in your AWS CloudFormation template, use the following syntax:

JSON

{
  "AllocationStrategy" : String,
  "Context" : String,
  "ExcessCapacityTerminationPolicy" : String,
  "IamFleetRole" : String,
  "InstanceInterruptionBehavior" : String,
  "InstancePoolsToUseCount" : Integer,
  "LaunchSpecifications" : [ SpotFleetLaunchSpecification, ... ],
  "LaunchTemplateConfigs" : [ LaunchTemplateConfig, ... ],
  "LoadBalancersConfig" : LoadBalancersConfig,
  "OnDemandAllocationStrategy" : String,
  "OnDemandMaxTotalPrice" : String,
  "OnDemandTargetCapacity" : Integer,
  "ReplaceUnhealthyInstances" : Boolean,
  "SpotMaintenanceStrategies" : SpotMaintenanceStrategies,
  "SpotMaxTotalPrice" : String,
  "SpotPrice" : String,
  "TagSpecifications" : [ SpotFleetTagSpecification, ... ],
  "TargetCapacity" : Integer,
  "TargetCapacityUnitType" : String,
  "TerminateInstancesWithExpiration" : Boolean,
  "Type" : String,
  "ValidFrom" : String,
  "ValidUntil" : String
}

YAML

  AllocationStrategy: String
  Context: String
  ExcessCapacityTerminationPolicy: String
  IamFleetRole: String
  InstanceInterruptionBehavior: String
  InstancePoolsToUseCount: Integer
  LaunchSpecifications: 
    - SpotFleetLaunchSpecification
  LaunchTemplateConfigs: 
    - LaunchTemplateConfig
  LoadBalancersConfig: 
    LoadBalancersConfig
  OnDemandAllocationStrategy: String
  OnDemandMaxTotalPrice: String
  OnDemandTargetCapacity: Integer
  ReplaceUnhealthyInstances: Boolean
  SpotMaintenanceStrategies: 
    SpotMaintenanceStrategies
  SpotMaxTotalPrice: String
  SpotPrice: String
  TagSpecifications: 
    - SpotFleetTagSpecification
  TargetCapacity: Integer
  TargetCapacityUnitType: String
  TerminateInstancesWithExpiration: Boolean
  Type: String
  ValidFrom: String
  ValidUntil: String

Properties

AllocationStrategy

The strategy that determines how to allocate the target Spot Instance capacity across the Spot Instance pools specified by the Spot Fleet launch configuration. For more information, see Allocation strategies for Spot Instances in the Amazon EC2 User Guide.

priceCapacityOptimized (recommended)

Spot Fleet identifies the pools with the highest capacity availability for the number of instances that are launching. This means that we will request Spot Instances from the pools that we believe have the lowest chance of interruption in the near term. Spot Fleet then requests Spot Instances from the lowest priced of these pools.

capacityOptimized

Spot Fleet identifies the pools with the highest capacity availability for the number of instances that are launching. This means that we will request Spot Instances from the pools that we believe have the lowest chance of interruption in the near term. To give certain instance types a higher chance of launching first, use capacityOptimizedPrioritized. Set a priority for each instance type by using the Priority parameter for LaunchTemplateOverrides. You can assign the same priority to different LaunchTemplateOverrides. EC2 implements the priorities on a best-effort basis, but optimizes for capacity first. capacityOptimizedPrioritized is supported only if your Spot Fleet uses a launch template. Note that if the OnDemandAllocationStrategy is set to prioritized, the same priority is applied when fulfilling On-Demand capacity.

diversified

Spot Fleet requests instances from all of the Spot Instance pools that you specify.

lowestPrice (not recommended)

Important

We don't recommend the lowestPrice allocation strategy because it has the highest risk of interruption for your Spot Instances.

Spot Fleet requests instances from the lowest priced Spot Instance pool that has available capacity. If the lowest priced pool doesn't have available capacity, the Spot Instances come from the next lowest priced pool that has available capacity. If a pool runs out of capacity before fulfilling your desired capacity, Spot Fleet will continue to fulfill your request by drawing from the next lowest priced pool. To ensure that your desired capacity is met, you might receive Spot Instances from several pools. Because this strategy only considers instance price and not capacity availability, it might lead to high interruption rates.

Default: lowestPrice

Required: No

Type: String

Allowed values: capacityOptimized | capacityOptimizedPrioritized | diversified | lowestPrice | priceCapacityOptimized

Update requires: Replacement

Context

Reserved.

Required: No

Type: String

Update requires: No interruption

ExcessCapacityTerminationPolicy

Indicates whether running Spot Instances should be terminated if you decrease the target capacity of the Spot Fleet request below the current size of the Spot Fleet.

Supported only for fleets of type maintain.

Required: No

Type: String

Allowed values: Default | NoTermination | default | noTermination

Update requires: No interruption

IamFleetRole

The Amazon Resource Name (ARN) of an AWS Identity and Access Management (IAM) role that grants the Spot Fleet the permission to request, launch, terminate, and tag instances on your behalf. For more information, see Spot Fleet Prerequisites in the Amazon EC2 User Guide. Spot Fleet can terminate Spot Instances on your behalf when you cancel its Spot Fleet request or when the Spot Fleet request expires, if you set TerminateInstancesWithExpiration.

Required: Yes

Type: String

Update requires: Replacement

InstanceInterruptionBehavior

The behavior when a Spot Instance is interrupted. The default is terminate.

Required: No

Type: String

Allowed values: hibernate | stop | terminate

Update requires: Replacement

InstancePoolsToUseCount

The number of Spot pools across which to allocate your target Spot capacity. Valid only when Spot AllocationStrategy is set to lowest-price. Spot Fleet selects the cheapest Spot pools and evenly allocates your target Spot capacity across the number of Spot pools that you specify.

Note that Spot Fleet attempts to draw Spot Instances from the number of pools that you specify on a best effort basis. If a pool runs out of Spot capacity before fulfilling your target capacity, Spot Fleet will continue to fulfill your request by drawing from the next cheapest pool. To ensure that your target capacity is met, you might receive Spot Instances from more than the number of pools that you specified. Similarly, if most of the pools have no Spot capacity, you might receive your full target capacity from fewer than the number of pools that you specified.

Required: No

Type: Integer

Update requires: Replacement

LaunchSpecifications

The launch specifications for the Spot Fleet request. If you specify LaunchSpecifications, you can't specify LaunchTemplateConfigs.

Required: Conditional

Type: Array of SpotFleetLaunchSpecification

Update requires: Replacement

LaunchTemplateConfigs

The launch template and overrides. If you specify LaunchTemplateConfigs, you can't specify LaunchSpecifications.

Required: Conditional

Type: Array of LaunchTemplateConfig

Update requires: Replacement

LoadBalancersConfig

One or more Classic Load Balancers and target groups to attach to the Spot Fleet request. Spot Fleet registers the running Spot Instances with the specified Classic Load Balancers and target groups.

With Network Load Balancers, Spot Fleet cannot register instances that have the following instance types: C1, CC1, CC2, CG1, CG2, CR1, CS1, G1, G2, HI1, HS1, M1, M2, M3, and T1.

Required: No

Type: LoadBalancersConfig

Update requires: Replacement

OnDemandAllocationStrategy

The order of the launch template overrides to use in fulfilling On-Demand capacity. If you specify lowestPrice, Spot Fleet uses price to determine the order, launching the lowest price first. If you specify prioritized, Spot Fleet uses the priority that you assign to each Spot Fleet launch template override, launching the highest priority first. If you do not specify a value, Spot Fleet defaults to lowestPrice.

Required: No

Type: String

Allowed values: lowestPrice | prioritized

Update requires: Replacement

OnDemandMaxTotalPrice

The maximum amount per hour for On-Demand Instances that you're willing to pay. You can use the onDemandMaxTotalPrice parameter, the spotMaxTotalPrice parameter, or both parameters to ensure that your fleet cost does not exceed your budget. If you set a maximum price per hour for the On-Demand Instances and Spot Instances in your request, Spot Fleet will launch instances until it reaches the maximum amount you're willing to pay. When the maximum amount you're willing to pay is reached, the fleet stops launching instances even if it hasn’t met the target capacity.

Note

If your fleet includes T instances that are configured as unlimited, and if their average CPU usage exceeds the baseline utilization, you will incur a charge for surplus credits. The onDemandMaxTotalPrice does not account for surplus credits, and, if you use surplus credits, your final cost might be higher than what you specified for onDemandMaxTotalPrice. For more information, see Surplus credits can incur charges in the Amazon EC2 User Guide.

Required: No

Type: String

Update requires: Replacement

OnDemandTargetCapacity

The number of On-Demand units to request. You can choose to set the target capacity in terms of instances or a performance characteristic that is important to your application workload, such as vCPUs, memory, or I/O. If the request type is maintain, you can specify a target capacity of 0 and add capacity later.

Required: No

Type: Integer

Update requires: Replacement

ReplaceUnhealthyInstances

Indicates whether Spot Fleet should replace unhealthy instances.

Required: No

Type: Boolean

Update requires: Replacement

SpotMaintenanceStrategies

The strategies for managing your Spot Instances that are at an elevated risk of being interrupted.

Required: No

Type: SpotMaintenanceStrategies

Update requires: Replacement

SpotMaxTotalPrice

The maximum amount per hour for Spot Instances that you're willing to pay. You can use the spotMaxTotalPrice parameter, the onDemandMaxTotalPrice parameter, or both parameters to ensure that your fleet cost does not exceed your budget. If you set a maximum price per hour for the On-Demand Instances and Spot Instances in your request, Spot Fleet will launch instances until it reaches the maximum amount you're willing to pay. When the maximum amount you're willing to pay is reached, the fleet stops launching instances even if it hasn’t met the target capacity.

Note

If your fleet includes T instances that are configured as unlimited, and if their average CPU usage exceeds the baseline utilization, you will incur a charge for surplus credits. The spotMaxTotalPrice does not account for surplus credits, and, if you use surplus credits, your final cost might be higher than what you specified for spotMaxTotalPrice. For more information, see Surplus credits can incur charges in the Amazon EC2 User Guide.

Required: No

Type: String

Update requires: Replacement

SpotPrice

The maximum price per unit hour that you are willing to pay for a Spot Instance. We do not recommend using this parameter because it can lead to increased interruptions. If you do not specify this parameter, you will pay the current Spot price.

Important

If you specify a maximum price, your instances will be interrupted more frequently than if you do not specify this parameter.

Required: No

Type: String

Update requires: Replacement

TagSpecifications

The key-value pair for tagging the Spot Fleet request on creation. The value for ResourceType must be spot-fleet-request, otherwise the Spot Fleet request fails. To tag instances at launch, specify the tags in the launch template (valid only if you use LaunchTemplateConfigs) or in the SpotFleetTagSpecification (valid only if you use LaunchSpecifications). For information about tagging after launch, see Tag your resources.

Required: No

Type: Array of SpotFleetTagSpecification

Update requires: Replacement

TargetCapacity

The number of units to request for the Spot Fleet. You can choose to set the target capacity in terms of instances or a performance characteristic that is important to your application workload, such as vCPUs, memory, or I/O. If the request type is maintain, you can specify a target capacity of 0 and add capacity later.

Required: Yes

Type: Integer

Update requires: No interruption

TargetCapacityUnitType

The unit for the target capacity. You can specify this parameter only when using attribute-based instance type selection.

Default: units (the number of instances)

Required: No

Type: String

Allowed values: vcpu | memory-mib | units

Update requires: No interruption

TerminateInstancesWithExpiration

Indicates whether running Spot Instances are terminated when the Spot Fleet request expires.

Required: No

Type: Boolean

Update requires: Replacement

Type

The type of request. Indicates whether the Spot Fleet only requests the target capacity or also attempts to maintain it. When this value is request, the Spot Fleet only places the required requests. It does not attempt to replenish Spot Instances if capacity is diminished, nor does it submit requests in alternative Spot pools if capacity is not available. When this value is maintain, the Spot Fleet maintains the target capacity. The Spot Fleet places the required requests to meet capacity and automatically replenishes any interrupted instances. Default: maintain. instant is listed but is not used by Spot Fleet.

Required: No

Type: String

Allowed values: maintain | request

Update requires: Replacement

ValidFrom

The start date and time of the request, in UTC format (YYYY-MM-DDTHH:MM:SSZ). By default, Amazon EC2 starts fulfilling the request immediately.

Required: No

Type: String

Update requires: Replacement

ValidUntil

The end date and time of the request, in UTC format (YYYY-MM-DDTHH:MM:SSZ). After the end date and time, no new Spot Instance requests are placed or able to fulfill the request. If no value is specified, the Spot Fleet request remains until you cancel it.

Required: No

Type: String

Update requires: Replacement