Amazonka.ECS.Types.PlacementStrategy

Documentation

data PlacementStrategy

The task placement strategy for a task or service. For more information, see Task placement strategies in the Amazon Elastic Container Service Developer Guide.

See: newPlacementStrategy smart constructor.

Constructors

PlacementStrategy'

Fields

• field :: Maybe Text

  The field to apply the placement strategy against. For the spread placement strategy, valid values are instanceId (or host, which has the same effect), or any platform or custom attribute that's applied to a container instance, such as attribute:ecs.availability-zone. For the binpack placement strategy, valid values are cpu and memory. For the random placement strategy, this field is not used.

• type' :: Maybe PlacementStrategyType

  The type of placement strategy. The random placement strategy randomly places tasks on available candidates. The spread placement strategy spreads placement across available candidates evenly based on the field parameter. The binpack strategy places tasks on available candidates that have the least available amount of the resource that's specified with the field parameter. For example, if you binpack on memory, a task is placed on the instance with the least amount of remaining memory but still enough to run the task.

Instances

FromJSON PlacementStrategy

Defined in Amazonka.ECS.Types.PlacementStrategy

Methods

parseJSON :: Value -> Parser PlacementStrategy

parseJSONList :: Value -> Parser [PlacementStrategy]

ToJSON PlacementStrategy

Defined in Amazonka.ECS.Types.PlacementStrategy

Methods

toJSON :: PlacementStrategy -> Value

toEncoding :: PlacementStrategy -> Encoding

toJSONList :: [PlacementStrategy] -> Value

toEncodingList :: [PlacementStrategy] -> Encoding

Generic PlacementStrategy

Defined in Amazonka.ECS.Types.PlacementStrategy

Associated Types

type Rep PlacementStrategy :: Type -> Type

Methods

from :: PlacementStrategy -> Rep PlacementStrategy x

to :: Rep PlacementStrategy x -> PlacementStrategy

Read PlacementStrategy

Defined in Amazonka.ECS.Types.PlacementStrategy

Methods

readsPrec :: Int -> ReadS PlacementStrategy

readList :: ReadS [PlacementStrategy]

readPrec :: ReadPrec PlacementStrategy

readListPrec :: ReadPrec [PlacementStrategy]

Show PlacementStrategy

Defined in Amazonka.ECS.Types.PlacementStrategy

Methods

showsPrec :: Int -> PlacementStrategy -> ShowS

show :: PlacementStrategy -> String

showList :: [PlacementStrategy] -> ShowS

NFData PlacementStrategy

Defined in Amazonka.ECS.Types.PlacementStrategy

Methods

rnf :: PlacementStrategy -> ()

Eq PlacementStrategy

Defined in Amazonka.ECS.Types.PlacementStrategy

Methods

(==) :: PlacementStrategy -> PlacementStrategy -> Bool

(/=) :: PlacementStrategy -> PlacementStrategy -> Bool

Hashable PlacementStrategy

Defined in Amazonka.ECS.Types.PlacementStrategy

Methods

hashWithSalt :: Int -> PlacementStrategy -> Int

hash :: PlacementStrategy -> Int

type Rep PlacementStrategy

Defined in Amazonka.ECS.Types.PlacementStrategy

type Rep PlacementStrategy = D1 ('MetaData "PlacementStrategy" "Amazonka.ECS.Types.PlacementStrategy" "amazonka-ecs-2.0-3xFxVqi9x5nBZ44jBEC5G8" 'False) (C1 ('MetaCons "PlacementStrategy'" 'PrefixI 'True) (S1 ('MetaSel ('Just "field") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedStrict) (Rec0 (Maybe Text)) :*: S1 ('MetaSel ('Just "type'") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedStrict) (Rec0 (Maybe PlacementStrategyType))))

newPlacementStrategy :: PlacementStrategy

Create a value of PlacementStrategy with all optional fields omitted.

Use generic-lens or optics to modify other optional fields.

The following record fields are available, with the corresponding lenses provided for backwards compatibility:

$sel:field:PlacementStrategy', placementStrategy_field - The field to apply the placement strategy against. For the spread placement strategy, valid values are instanceId (or host, which has the same effect), or any platform or custom attribute that's applied to a container instance, such as attribute:ecs.availability-zone. For the binpack placement strategy, valid values are cpu and memory. For the random placement strategy, this field is not used.

$sel:type':PlacementStrategy', placementStrategy_type - The type of placement strategy. The random placement strategy randomly places tasks on available candidates. The spread placement strategy spreads placement across available candidates evenly based on the field parameter. The binpack strategy places tasks on available candidates that have the least available amount of the resource that's specified with the field parameter. For example, if you binpack on memory, a task is placed on the instance with the least amount of remaining memory but still enough to run the task.

placementStrategy_field :: Lens' PlacementStrategy (Maybe Text)

The field to apply the placement strategy against. For the spread placement strategy, valid values are instanceId (or host, which has the same effect), or any platform or custom attribute that's applied to a container instance, such as attribute:ecs.availability-zone. For the binpack placement strategy, valid values are cpu and memory. For the random placement strategy, this field is not used.

placementStrategy_type :: Lens' PlacementStrategy (Maybe PlacementStrategyType)

The type of placement strategy. The random placement strategy randomly places tasks on available candidates. The spread placement strategy spreads placement across available candidates evenly based on the field parameter. The binpack strategy places tasks on available candidates that have the least available amount of the resource that's specified with the field parameter. For example, if you binpack on memory, a task is placed on the instance with the least amount of remaining memory but still enough to run the task.