You are viewing documentation for version 2 of the AWS SDK for Ruby. Version 3 documentation can be found here.

Class: Aws::ECS::Types::TaskDefinitionPlacementConstraint

Inherits:
Struct
  • Object
show all
Defined in:
(unknown)

Overview

Note:

When passing TaskDefinitionPlacementConstraint as input to an Aws::Client method, you can use a vanilla Hash:

{
  type: "memberOf", # accepts memberOf
  expression: "String",
}

An object representing a constraint on task placement in the task definition. For more information, see Task Placement Constraints in the Amazon EC2 Container Service Developer Guide.

Instance Attribute Summary collapse

Instance Attribute Details

#expressionString

A cluster query language expression to apply to the constraint. For more information, see Cluster Query Language in the Amazon EC2 Container Service Developer Guide.

Returns:

  • (String)

    A cluster query language expression to apply to the constraint.

#typeString

The type of constraint. The DistinctInstance constraint ensures that each task in a particular group is running on a different container instance. The MemberOf constraint restricts selection to be from a group of valid candidates.

Possible values:

  • memberOf

Returns:

  • (String)

    The type of constraint.