Class: Aws::ECS::Types::PlacementConstraint

Inherits:

Struct

• Object
• Struct
• Aws::ECS::Types::PlacementConstraint

Includes:

Structure

Defined in:

lib/aws-sdk-ecs/types.rb

Overview

Note:

When making an API call, you may pass PlacementConstraint data as a hash:

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

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

[1]: docs.aws.amazon.com/AmazonECS/latest/developerguide/task-placement-constraints.html

See Also:

• AWS API Documentation

Instance Attribute Summary

• #expression ⇒ String

  A cluster query language expression to apply to the constraint.

• #type ⇒ String

  The type of constraint.

Instance Attribute Details

#expression ⇒ String

A cluster query language expression to apply to the constraint. Note you cannot specify an expression if the constraint type is ‘distinctInstance`. For more information, see [Cluster Query Language] in the *Amazon Elastic Container Service Developer Guide*.

[1]: docs.aws.amazon.com/AmazonECS/latest/developerguide/cluster-query-language.html

Returns:

• (String)

# File 'lib/aws-sdk-ecs/types.rb', line 3538

class PlacementConstraint < Struct.new(
  :type,
  :expression)
  include Aws::Structure
end

#type ⇒ String

The type of constraint. Use ‘distinctInstance` to ensure that each task in a particular group is running on a different container instance. Use `memberOf` to restrict the selection to a group of valid candidates. The value `distinctInstance` is not supported in task definitions.

Returns:

• (String)

# File 'lib/aws-sdk-ecs/types.rb', line 3538

class PlacementConstraint < Struct.new(
  :type,
  :expression)
  include Aws::Structure
end