Network.AWS.ECS.UpdateService

Modifies the desired count, deployment configuration, network configuration, or task definition used in a service.

You can add to or subtract from the number of instantiations of a task definition in a service by specifying the cluster that the service is running in and a new desiredCount parameter.

If you have updated the Docker image of your application, you can create a new task definition with that image and deploy it to your service. The service scheduler uses the minimum healthy percent and maximum percent parameters (in the service's deployment configuration) to determine the deployment strategy.

You can also update the deployment configuration of a service. When a deployment is triggered by updating the task definition of a service, the service scheduler uses the deployment configuration parameters, minimumHealthyPercent and maximumPercent , to determine the deployment strategy.

• If minimumHealthyPercent is below 100%, the scheduler can ignore desiredCount temporarily during a deployment. For example, if desiredCount is four tasks, a minimum of 50% allows the scheduler to stop two existing tasks before starting two new tasks. Tasks for services that do not use a load balancer are considered healthy if they are in the RUNNING state. Tasks for services that use a load balancer are considered healthy if they are in the RUNNING state and the container instance they are hosted on is reported as healthy by the load balancer.
• The maximumPercent parameter represents an upper limit on the number of running tasks during a deployment, which enables you to define the deployment batch size. For example, if desiredCount is four tasks, a maximum of 200% starts four new tasks before stopping the four older tasks (provided that the cluster resources required to do this are available).

When UpdateService stops a task during a deployment, the equivalent of docker stop is issued to the containers running in the task. This results in a SIGTERM and a 30-second timeout, after which SIGKILL is sent and the containers are forcibly stopped. If the container handles the SIGTERM gracefully and exits within 30 seconds from receiving it, no SIGKILL is sent.

When the service scheduler launches new tasks, it determines task placement in your cluster with the following logic:

• Determine which of the container instances in your cluster can support your service's task definition (for example, they have the required CPU, memory, ports, and container instance attributes).
• By default, the service scheduler attempts to balance tasks across Availability Zones in this manner (although you can choose a different placement strategy):
• Sort the valid container instances by the fewest number of running tasks for this service in the same Availability Zone as the instance. For example, if zone A has one running service task and zones B and C each have zero, valid container instances in either zone B or C are considered optimal for placement.
• Place the new service task on a valid container instance in an optimal Availability Zone (based on the previous steps), favoring container instances with the fewest number of running tasks for this service.

When the service scheduler stops running tasks, it attempts to maintain balance across the Availability Zones in your cluster using the following logic:

• Sort the container instances by the largest number of running tasks for this service in the same Availability Zone as the instance. For example, if zone A has one running service task and zones B and C each have two, container instances in either zone B or C are considered optimal for termination.
• Stop the task on a container instance in an optimal Availability Zone (based on the previous steps), favoring container instances with the largest number of running tasks for this service.

Creating a Request

updateService

Arguments

:: Text

usService

-> UpdateService

Creates a value of UpdateService with the minimum fields required to make a request.

Use one of the following lenses to modify other fields as desired:

• usCluster - The short name or full Amazon Resource Name (ARN) of the cluster that your service is running on. If you do not specify a cluster, the default cluster is assumed.
• usPlatformVersion - The platform version you want to update your service to run.
• usDesiredCount - The number of instantiations of the task to place and keep running in your service.
• usForceNewDeployment - Whether to force a new deployment of the service. Deployments are not forced by default. You can use this option to trigger a new deployment with no service definition changes. For example, you can update a service's tasks to use a newer Docker image with the same image/tag combination (my_image:latest ) or to roll Fargate tasks onto a newer platform version.
• usTaskDefinition - The family and revision (family:revision ) or full ARN of the task definition to run in your service. If a revision is not specified, the latest ACTIVE revision is used. If you modify the task definition with UpdateService , Amazon ECS spawns a task with the new version of the task definition and then stops an old task after the new version is running.
• usHealthCheckGracePeriodSeconds - The period of time, in seconds, that the Amazon ECS service scheduler should ignore unhealthy Elastic Load Balancing target health checks after a task has first started. This is only valid if your service is configured to use a load balancer. If your service's tasks take a while to start and respond to Elastic Load Balancing health checks, you can specify a health check grace period of up to 1,800 seconds during which the ECS service scheduler ignores the Elastic Load Balancing health check status. This grace period can prevent the ECS service scheduler from marking tasks as unhealthy and stopping them before they have time to come up.
• usNetworkConfiguration - The network configuration for the service. This parameter is required for task definitions that use the awsvpc network mode to receive their own elastic network interface, and it is not supported for other network modes. For more information, see Task Networking in the Amazon Elastic Container Service Developer Guide .
• usDeploymentConfiguration - Optional deployment parameters that control how many tasks run during the deployment and the ordering of stopping and starting tasks.
• usService - The name of the service to update.

data UpdateService

See: updateService smart constructor.

Instances

Eq UpdateService

Defined in Network.AWS.ECS.UpdateService

Methods

(==) :: UpdateService -> UpdateService -> Bool

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

Data UpdateService

Defined in Network.AWS.ECS.UpdateService

Methods

gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> UpdateService -> c UpdateService

gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c UpdateService

toConstr :: UpdateService -> Constr

dataTypeOf :: UpdateService -> DataType

dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c UpdateService)

dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c UpdateService)

gmapT :: (forall b. Data b => b -> b) -> UpdateService -> UpdateService

gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> UpdateService -> r

gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> UpdateService -> r

gmapQ :: (forall d. Data d => d -> u) -> UpdateService -> [u]

gmapQi :: Int -> (forall d. Data d => d -> u) -> UpdateService -> u

gmapM :: Monad m => (forall d. Data d => d -> m d) -> UpdateService -> m UpdateService

gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> UpdateService -> m UpdateService

gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> UpdateService -> m UpdateService

Read UpdateService

Defined in Network.AWS.ECS.UpdateService

Methods

readsPrec :: Int -> ReadS UpdateService

readList :: ReadS [UpdateService]

readPrec :: ReadPrec UpdateService

readListPrec :: ReadPrec [UpdateService]

Show UpdateService

Defined in Network.AWS.ECS.UpdateService

Methods

showsPrec :: Int -> UpdateService -> ShowS

show :: UpdateService -> String

showList :: [UpdateService] -> ShowS

Generic UpdateService

Defined in Network.AWS.ECS.UpdateService

Associated Types

type Rep UpdateService :: Type -> Type

Methods

from :: UpdateService -> Rep UpdateService x

to :: Rep UpdateService x -> UpdateService

Hashable UpdateService

Defined in Network.AWS.ECS.UpdateService

Methods

hashWithSalt :: Int -> UpdateService -> Int

hash :: UpdateService -> Int

ToJSON UpdateService

Defined in Network.AWS.ECS.UpdateService

Methods

toJSON :: UpdateService -> Value

toEncoding :: UpdateService -> Encoding

toJSONList :: [UpdateService] -> Value

toEncodingList :: [UpdateService] -> Encoding

AWSRequest UpdateService

Defined in Network.AWS.ECS.UpdateService

Associated Types

type Rs UpdateService :: Type

Methods

request :: UpdateService -> Request UpdateService

response :: (MonadResource m, MonadThrow m) => Logger -> Service -> Proxy UpdateService -> ClientResponse -> m (Response UpdateService)

ToHeaders UpdateService

Defined in Network.AWS.ECS.UpdateService

Methods

toHeaders :: UpdateService -> [Header]

ToPath UpdateService

Defined in Network.AWS.ECS.UpdateService

Methods

toPath :: UpdateService -> ByteString

ToQuery UpdateService

Defined in Network.AWS.ECS.UpdateService

Methods

toQuery :: UpdateService -> QueryString

NFData UpdateService

Defined in Network.AWS.ECS.UpdateService

Methods

rnf :: UpdateService -> ()

type Rep UpdateService

Defined in Network.AWS.ECS.UpdateService

type Rep UpdateService = D1 (MetaData "UpdateService" "Network.AWS.ECS.UpdateService" "amazonka-ecs-1.6.1-7o1YH8hMK1ABbFowaTE1Sy" False) (C1 (MetaCons "UpdateService'" PrefixI True) (((S1 (MetaSel (Just "_usCluster") NoSourceUnpackedness SourceStrict DecidedStrict) (Rec0 (Maybe Text)) :*: S1 (MetaSel (Just "_usPlatformVersion") NoSourceUnpackedness SourceStrict DecidedStrict) (Rec0 (Maybe Text))) :*: (S1 (MetaSel (Just "_usDesiredCount") NoSourceUnpackedness SourceStrict DecidedStrict) (Rec0 (Maybe Int)) :*: S1 (MetaSel (Just "_usForceNewDeployment") NoSourceUnpackedness SourceStrict DecidedStrict) (Rec0 (Maybe Bool)))) :*: ((S1 (MetaSel (Just "_usTaskDefinition") NoSourceUnpackedness SourceStrict DecidedStrict) (Rec0 (Maybe Text)) :*: S1 (MetaSel (Just "_usHealthCheckGracePeriodSeconds") NoSourceUnpackedness SourceStrict DecidedStrict) (Rec0 (Maybe Int))) :*: (S1 (MetaSel (Just "_usNetworkConfiguration") NoSourceUnpackedness SourceStrict DecidedStrict) (Rec0 (Maybe NetworkConfiguration)) :*: (S1 (MetaSel (Just "_usDeploymentConfiguration") NoSourceUnpackedness SourceStrict DecidedStrict) (Rec0 (Maybe DeploymentConfiguration)) :*: S1 (MetaSel (Just "_usService") NoSourceUnpackedness SourceStrict DecidedStrict) (Rec0 Text))))))

type Rs UpdateService

Defined in Network.AWS.ECS.UpdateService

type Rs UpdateService = UpdateServiceResponse

Request Lenses

usCluster :: Lens' UpdateService (Maybe Text)

The short name or full Amazon Resource Name (ARN) of the cluster that your service is running on. If you do not specify a cluster, the default cluster is assumed.

usPlatformVersion :: Lens' UpdateService (Maybe Text)

The platform version you want to update your service to run.

usDesiredCount :: Lens' UpdateService (Maybe Int)

The number of instantiations of the task to place and keep running in your service.

usForceNewDeployment :: Lens' UpdateService (Maybe Bool)

Whether to force a new deployment of the service. Deployments are not forced by default. You can use this option to trigger a new deployment with no service definition changes. For example, you can update a service's tasks to use a newer Docker image with the same image/tag combination (my_image:latest ) or to roll Fargate tasks onto a newer platform version.

usTaskDefinition :: Lens' UpdateService (Maybe Text)

The family and revision (family:revision ) or full ARN of the task definition to run in your service. If a revision is not specified, the latest ACTIVE revision is used. If you modify the task definition with UpdateService , Amazon ECS spawns a task with the new version of the task definition and then stops an old task after the new version is running.

usHealthCheckGracePeriodSeconds :: Lens' UpdateService (Maybe Int)

The period of time, in seconds, that the Amazon ECS service scheduler should ignore unhealthy Elastic Load Balancing target health checks after a task has first started. This is only valid if your service is configured to use a load balancer. If your service's tasks take a while to start and respond to Elastic Load Balancing health checks, you can specify a health check grace period of up to 1,800 seconds during which the ECS service scheduler ignores the Elastic Load Balancing health check status. This grace period can prevent the ECS service scheduler from marking tasks as unhealthy and stopping them before they have time to come up.

usNetworkConfiguration :: Lens' UpdateService (Maybe NetworkConfiguration)

The network configuration for the service. This parameter is required for task definitions that use the awsvpc network mode to receive their own elastic network interface, and it is not supported for other network modes. For more information, see Task Networking in the Amazon Elastic Container Service Developer Guide .

usDeploymentConfiguration :: Lens' UpdateService (Maybe DeploymentConfiguration)

Optional deployment parameters that control how many tasks run during the deployment and the ordering of stopping and starting tasks.

usService :: Lens' UpdateService Text

The name of the service to update.

Destructuring the Response

updateServiceResponse

Arguments

:: Int

usrsResponseStatus

-> UpdateServiceResponse

Creates a value of UpdateServiceResponse with the minimum fields required to make a request.

Use one of the following lenses to modify other fields as desired:

• usrsService - The full description of your service following the update call.
• usrsResponseStatus - -- | The response status code.

data UpdateServiceResponse

See: updateServiceResponse smart constructor.

Instances

Eq UpdateServiceResponse

Defined in Network.AWS.ECS.UpdateService

Methods

(==) :: UpdateServiceResponse -> UpdateServiceResponse -> Bool

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

Data UpdateServiceResponse

Defined in Network.AWS.ECS.UpdateService

Methods

gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> UpdateServiceResponse -> c UpdateServiceResponse

gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c UpdateServiceResponse

toConstr :: UpdateServiceResponse -> Constr

dataTypeOf :: UpdateServiceResponse -> DataType

dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c UpdateServiceResponse)

dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c UpdateServiceResponse)

gmapT :: (forall b. Data b => b -> b) -> UpdateServiceResponse -> UpdateServiceResponse

gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> UpdateServiceResponse -> r

gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> UpdateServiceResponse -> r

gmapQ :: (forall d. Data d => d -> u) -> UpdateServiceResponse -> [u]

gmapQi :: Int -> (forall d. Data d => d -> u) -> UpdateServiceResponse -> u

gmapM :: Monad m => (forall d. Data d => d -> m d) -> UpdateServiceResponse -> m UpdateServiceResponse

gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> UpdateServiceResponse -> m UpdateServiceResponse

gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> UpdateServiceResponse -> m UpdateServiceResponse

Read UpdateServiceResponse

Defined in Network.AWS.ECS.UpdateService

Methods

readsPrec :: Int -> ReadS UpdateServiceResponse

readList :: ReadS [UpdateServiceResponse]

readPrec :: ReadPrec UpdateServiceResponse

readListPrec :: ReadPrec [UpdateServiceResponse]

Show UpdateServiceResponse

Defined in Network.AWS.ECS.UpdateService

Methods

showsPrec :: Int -> UpdateServiceResponse -> ShowS

show :: UpdateServiceResponse -> String

showList :: [UpdateServiceResponse] -> ShowS

Generic UpdateServiceResponse

Defined in Network.AWS.ECS.UpdateService

Associated Types

type Rep UpdateServiceResponse :: Type -> Type

Methods

from :: UpdateServiceResponse -> Rep UpdateServiceResponse x

to :: Rep UpdateServiceResponse x -> UpdateServiceResponse

NFData UpdateServiceResponse

Defined in Network.AWS.ECS.UpdateService

Methods

rnf :: UpdateServiceResponse -> ()

type Rep UpdateServiceResponse

Defined in Network.AWS.ECS.UpdateService

type Rep UpdateServiceResponse = D1 (MetaData "UpdateServiceResponse" "Network.AWS.ECS.UpdateService" "amazonka-ecs-1.6.1-7o1YH8hMK1ABbFowaTE1Sy" False) (C1 (MetaCons "UpdateServiceResponse'" PrefixI True) (S1 (MetaSel (Just "_usrsService") NoSourceUnpackedness SourceStrict DecidedStrict) (Rec0 (Maybe ContainerService)) :*: S1 (MetaSel (Just "_usrsResponseStatus") NoSourceUnpackedness SourceStrict DecidedStrict) (Rec0 Int)))

Response Lenses

usrsService :: Lens' UpdateServiceResponse (Maybe ContainerService)

The full description of your service following the update call.

usrsResponseStatus :: Lens' UpdateServiceResponse Int

• - | The response status code.