AWS::EC2::EC2Fleet CapacityRebalance - Amazon CloudFormation
SyntaxProperties
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AWS::EC2::EC2Fleet CapacityRebalance

The Spot Instance replacement strategy to use when Amazon EC2 emits a rebalance notification signal that your Spot Instance is at an elevated risk of being interrupted. For more information, see Capacity rebalancing in the Amazon EC2 User Guide.

Syntax

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

JSON

{
  "ReplacementStrategy" : String,
  "TerminationDelay" : Integer
}

YAML

  ReplacementStrategy: String
  TerminationDelay: Integer

Properties

ReplacementStrategy

The replacement strategy to use. Only available for fleets of type maintain.

launch - EC2 Fleet launches a replacement Spot Instance when a rebalance notification is emitted for an existing Spot Instance in the fleet. EC2 Fleet does not terminate the instances that receive a rebalance notification. You can terminate the old instances, or you can leave them running. You are charged for all instances while they are running.

launch-before-terminate - EC2 Fleet launches a replacement Spot Instance when a rebalance notification is emitted for an existing Spot Instance in the fleet, and then, after a delay that you specify (in TerminationDelay), terminates the instances that received a rebalance notification.

Required: No

Type: String

Allowed values: launch | launch-before-terminate

Update requires: Replacement

TerminationDelay

The amount of time (in seconds) that Amazon EC2 waits before terminating the old Spot Instance after launching a new replacement Spot Instance.

Required when ReplacementStrategy is set to launch-before-terminate.

Not valid when ReplacementStrategy is set to launch.

Valid values: Minimum value of 120 seconds. Maximum value of 7200 seconds.

Required: No

Type: Integer

Update requires: Replacement