AWS::ECS::Cluster CapacityProviderStrategyItem - AWS CloudFormation

AWS::ECS::Cluster CapacityProviderStrategyItem

The CapacityProviderStrategyItem property specifies the details of the default capacity provider strategy for the cluster. When services or tasks are run in the cluster with no launch type or capacity provider strategy specified, the default capacity provider strategy is used.

Syntax

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

JSON

{ "Base" : Integer, "CapacityProvider" : String, "Weight" : Integer }

YAML

Base: Integer CapacityProvider: String Weight: Integer

Properties

Base

The base value designates how many tasks, at a minimum, to run on the specified capacity provider. Only one capacity provider in a capacity provider strategy can have a base defined. If no value is specified, the default value of 0 is used.

Required: No

Type: Integer

Minimum: 0

Maximum: 100000

Update requires: No interruption

CapacityProvider

The short name of the capacity provider.

Required: No

Type: String

Update requires: No interruption

Weight

The weight value designates the relative percentage of the total number of tasks launched that should use the specified capacity provider. The weight value is taken into consideration after the base value, if defined, is satisfied.

If no weight value is specified, the default value of 0 is used. When multiple capacity providers are specified within a capacity provider strategy, at least one of the capacity providers must have a weight value greater than zero and any capacity providers with a weight of 0 will not be used to place tasks. If you specify multiple capacity providers in a strategy that all have a weight of 0, any RunTask or CreateService actions using the capacity provider strategy will fail.

An example scenario for using weights is defining a strategy that contains two capacity providers and both have a weight of 1, then when the base is satisfied, the tasks will be split evenly across the two capacity providers. Using that same logic, if you specify a weight of 1 for capacityProviderA and a weight of 4 for capacityProviderB, then for every one task that is run using capacityProviderA, four tasks would use capacityProviderB.

Required: No

Type: Integer

Minimum: 0

Maximum: 1000

Update requires: No interruption