An object representing a constraint on task placement. For more information, see Task Placement Constraints in the Amazon EC2 Container Service Developer Guide.
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 EC2 Container Service Developer Guide.
The type of constraint. Use
distinctInstanceto ensure that each task in a particular group is running on a different container instance. Use
memberOfto restrict selection to a group of valid candidates. Note that
distinctInstanceis not supported in task definitions.
distinctInstance | memberOf
For more information about using this API in one of the language-specific AWS SDKs, see the following: