@Generated(value="com.amazonaws:aws-java-sdk-code-generator") public class AbstractAmazonECS extends Object implements AmazonECS
AmazonECS
. Convenient method forms pass through to the corresponding overload that
takes a request object, which throws an UnsupportedOperationException
.ENDPOINT_PREFIX
Modifier and Type | Method and Description |
---|---|
CreateClusterResult |
createCluster()
Simplified method form for invoking the CreateCluster operation.
|
CreateClusterResult |
createCluster(CreateClusterRequest request)
Creates a new Amazon ECS cluster.
|
CreateServiceResult |
createService(CreateServiceRequest request)
Runs and maintains a desired number of tasks from a specified task definition.
|
DeleteAttributesResult |
deleteAttributes(DeleteAttributesRequest request)
Deletes one or more custom attributes from an Amazon ECS resource.
|
DeleteClusterResult |
deleteCluster(DeleteClusterRequest request)
Deletes the specified cluster.
|
DeleteServiceResult |
deleteService(DeleteServiceRequest request)
Deletes a specified service within a cluster.
|
DeregisterContainerInstanceResult |
deregisterContainerInstance(DeregisterContainerInstanceRequest request)
Deregisters an Amazon ECS container instance from the specified cluster.
|
DeregisterTaskDefinitionResult |
deregisterTaskDefinition(DeregisterTaskDefinitionRequest request)
Deregisters the specified task definition by family and revision.
|
DescribeClustersResult |
describeClusters()
Simplified method form for invoking the DescribeClusters operation.
|
DescribeClustersResult |
describeClusters(DescribeClustersRequest request)
Describes one or more of your clusters.
|
DescribeContainerInstancesResult |
describeContainerInstances(DescribeContainerInstancesRequest request)
Describes Amazon EC2 Container Service container instances.
|
DescribeServicesResult |
describeServices(DescribeServicesRequest request)
Describes the specified services running in your cluster.
|
DescribeTaskDefinitionResult |
describeTaskDefinition(DescribeTaskDefinitionRequest request)
Describes a task definition.
|
DescribeTasksResult |
describeTasks(DescribeTasksRequest request)
Describes a specified task or tasks.
|
DiscoverPollEndpointResult |
discoverPollEndpoint()
Simplified method form for invoking the DiscoverPollEndpoint operation.
|
DiscoverPollEndpointResult |
discoverPollEndpoint(DiscoverPollEndpointRequest request)
|
ResponseMetadata |
getCachedResponseMetadata(AmazonWebServiceRequest request)
Returns additional metadata for a previously executed successful request, typically used for debugging issues
where a service isn't acting as expected.
|
ListAttributesResult |
listAttributes(ListAttributesRequest request)
Lists the attributes for Amazon ECS resources within a specified target type and cluster.
|
ListClustersResult |
listClusters()
Simplified method form for invoking the ListClusters operation.
|
ListClustersResult |
listClusters(ListClustersRequest request)
Returns a list of existing clusters.
|
ListContainerInstancesResult |
listContainerInstances()
Simplified method form for invoking the ListContainerInstances operation.
|
ListContainerInstancesResult |
listContainerInstances(ListContainerInstancesRequest request)
Returns a list of container instances in a specified cluster.
|
ListServicesResult |
listServices()
Simplified method form for invoking the ListServices operation.
|
ListServicesResult |
listServices(ListServicesRequest request)
Lists the services that are running in a specified cluster.
|
ListTaskDefinitionFamiliesResult |
listTaskDefinitionFamilies()
Simplified method form for invoking the ListTaskDefinitionFamilies operation.
|
ListTaskDefinitionFamiliesResult |
listTaskDefinitionFamilies(ListTaskDefinitionFamiliesRequest request)
Returns a list of task definition families that are registered to your account (which may include task definition
families that no longer have any
ACTIVE task definition revisions). |
ListTaskDefinitionsResult |
listTaskDefinitions()
Simplified method form for invoking the ListTaskDefinitions operation.
|
ListTaskDefinitionsResult |
listTaskDefinitions(ListTaskDefinitionsRequest request)
Returns a list of task definitions that are registered to your account.
|
ListTasksResult |
listTasks()
Simplified method form for invoking the ListTasks operation.
|
ListTasksResult |
listTasks(ListTasksRequest request)
Returns a list of tasks for a specified cluster.
|
PutAttributesResult |
putAttributes(PutAttributesRequest request)
Create or update an attribute on an Amazon ECS resource.
|
RegisterContainerInstanceResult |
registerContainerInstance(RegisterContainerInstanceRequest request)
|
RegisterTaskDefinitionResult |
registerTaskDefinition(RegisterTaskDefinitionRequest request)
Registers a new task definition from the supplied
family and containerDefinitions . |
RunTaskResult |
runTask(RunTaskRequest request)
Starts a new task using the specified task definition.
|
void |
setEndpoint(String endpoint)
Overrides the default endpoint for this client ("https://ecs.us-east-1.amazonaws.com").
|
void |
setRegion(Region region)
An alternative to
AmazonECS.setEndpoint(String) , sets the regional endpoint for this client's service
calls. |
void |
shutdown()
Shuts down this client object, releasing any resources that might be held open.
|
StartTaskResult |
startTask(StartTaskRequest request)
Starts a new task from the specified task definition on the specified container instance or instances.
|
StopTaskResult |
stopTask(StopTaskRequest request)
Stops a running task.
|
SubmitContainerStateChangeResult |
submitContainerStateChange()
Simplified method form for invoking the SubmitContainerStateChange operation.
|
SubmitContainerStateChangeResult |
submitContainerStateChange(SubmitContainerStateChangeRequest request)
|
SubmitTaskStateChangeResult |
submitTaskStateChange(SubmitTaskStateChangeRequest request)
|
UpdateContainerAgentResult |
updateContainerAgent(UpdateContainerAgentRequest request)
Updates the Amazon ECS container agent on a specified container instance.
|
UpdateContainerInstancesStateResult |
updateContainerInstancesState(UpdateContainerInstancesStateRequest request)
Modifies the status of an Amazon ECS container instance.
|
UpdateServiceResult |
updateService(UpdateServiceRequest request)
Modifies the desired count, deployment configuration, or task definition used in a service.
|
AmazonECSWaiters |
waiters() |
public void setEndpoint(String endpoint)
AmazonECS
Callers can pass in just the endpoint (ex: "ecs.us-east-1.amazonaws.com") or a full URL, including the protocol
(ex: "https://ecs.us-east-1.amazonaws.com"). If the protocol is not specified here, the default protocol from
this client's ClientConfiguration
will be used, which by default is HTTPS.
For more information on using AWS regions with the AWS SDK for Java, and a complete list of all available endpoints for all AWS services, see: http://developer.amazonwebservices.com/connect/entry.jspa?externalID=3912
This method is not threadsafe. An endpoint should be configured when the client is created and before any service requests are made. Changing it afterwards creates inevitable race conditions for any service requests in transit or retrying.
setEndpoint
in interface AmazonECS
endpoint
- The endpoint (ex: "ecs.us-east-1.amazonaws.com") or a full URL, including the protocol (ex:
"https://ecs.us-east-1.amazonaws.com") of the region specific AWS endpoint this client will communicate
with.public void setRegion(Region region)
AmazonECS
AmazonECS.setEndpoint(String)
, sets the regional endpoint for this client's service
calls. Callers can use this method to control which AWS region they want to work with.
By default, all service endpoints in all regions use the https protocol. To use http instead, specify it in the
ClientConfiguration
supplied at construction.
This method is not threadsafe. A region should be configured when the client is created and before any service requests are made. Changing it afterwards creates inevitable race conditions for any service requests in transit or retrying.
setRegion
in interface AmazonECS
region
- The region this client will communicate with. See Region.getRegion(com.amazonaws.regions.Regions)
for accessing a given region. Must not be null and must be a region where the service is available.Region.getRegion(com.amazonaws.regions.Regions)
,
Region.createClient(Class, com.amazonaws.auth.AWSCredentialsProvider, ClientConfiguration)
,
Region.isServiceSupported(String)
public CreateClusterResult createCluster(CreateClusterRequest request)
AmazonECS
Creates a new Amazon ECS cluster. By default, your account receives a default
cluster when you
launch your first container instance. However, you can create your own cluster with a unique name with the
CreateCluster
action.
createCluster
in interface AmazonECS
public CreateClusterResult createCluster()
AmazonECS
createCluster
in interface AmazonECS
AmazonECS.createCluster(CreateClusterRequest)
public CreateServiceResult createService(CreateServiceRequest request)
AmazonECS
Runs and maintains a desired number of tasks from a specified task definition. If the number of tasks running in
a service drops below desiredCount
, Amazon ECS spawns another copy of the task in the specified
cluster. To update an existing service, see UpdateService.
In addition to maintaining the desired count of tasks in your service, you can optionally run your service behind a load balancer. The load balancer distributes traffic across the tasks that are associated with the service. For more information, see Service Load Balancing in the Amazon EC2 Container Service Developer Guide.
You can optionally specify a deployment configuration for your service. During a deployment (which is triggered
by changing the task definition or the desired count of a service with an UpdateService operation), the
service scheduler uses the minimumHealthyPercent
and maximumPercent
parameters to
determine the deployment strategy.
The minimumHealthyPercent
represents a lower limit on the number of your service's tasks that must
remain in the RUNNING
state during a deployment, as a percentage of the desiredCount
(rounded up to the nearest integer). This parameter enables you to deploy without using additional cluster
capacity. For example, if your service has a desiredCount
of four tasks and a
minimumHealthyPercent
of 50%, the scheduler can stop two existing tasks to free up cluster capacity
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 do 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 default value for minimumHealthyPercent
is 50% in the
console and 100% for the AWS CLI, the AWS SDKs, and the APIs.
The maximumPercent
parameter represents an upper limit on the number of your service's tasks that
are allowed in the RUNNING
or PENDING
state during a deployment, as a percentage of the
desiredCount
(rounded down to the nearest integer). This parameter enables you to define the
deployment batch size. For example, if your service has a desiredCount
of four tasks and a
maximumPercent
value of 200%, the scheduler can start four new tasks before stopping the four older
tasks (provided that the cluster resources required to do this are available). The default value for
maximumPercent
is 200%.
When the service scheduler launches new tasks, it determines task placement in your cluster using 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) with the placementStrategy
parameter):
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.
createService
in interface AmazonECS
public DeleteAttributesResult deleteAttributes(DeleteAttributesRequest request)
AmazonECS
Deletes one or more custom attributes from an Amazon ECS resource.
deleteAttributes
in interface AmazonECS
public DeleteClusterResult deleteCluster(DeleteClusterRequest request)
AmazonECS
Deletes the specified cluster. You must deregister all container instances from this cluster before you may delete it. You can list the container instances in a cluster with ListContainerInstances and deregister them with DeregisterContainerInstance.
deleteCluster
in interface AmazonECS
public DeleteServiceResult deleteService(DeleteServiceRequest request)
AmazonECS
Deletes a specified service within a cluster. You can delete a service if you have no running tasks in it and the desired task count is zero. If the service is actively maintaining tasks, you cannot delete it, and you must update the service to a desired task count of zero. For more information, see UpdateService.
When you delete a service, if there are still running tasks that require cleanup, the service status moves from
ACTIVE
to DRAINING
, and the service is no longer visible in the console or in
ListServices API operations. After the tasks have stopped, then the service status moves from
DRAINING
to INACTIVE
. Services in the DRAINING
or INACTIVE
status can still be viewed with DescribeServices API operations; however, in the future,
INACTIVE
services may be cleaned up and purged from Amazon ECS record keeping, and
DescribeServices API operations on those services will return a ServiceNotFoundException
error.
deleteService
in interface AmazonECS
public DeregisterContainerInstanceResult deregisterContainerInstance(DeregisterContainerInstanceRequest request)
AmazonECS
Deregisters an Amazon ECS container instance from the specified cluster. This instance is no longer available to run tasks.
If you intend to use the container instance for some other purpose after deregistration, you should stop all of the tasks running on the container instance before deregistration to avoid any orphaned tasks from consuming resources.
Deregistering a container instance removes the instance from a cluster, but it does not terminate the EC2 instance; if you are finished using the instance, be sure to terminate it in the Amazon EC2 console to stop billing.
If you terminate a running container instance, Amazon ECS automatically deregisters the instance from your cluster (stopped container instances or instances with disconnected agents are not automatically deregistered when terminated).
deregisterContainerInstance
in interface AmazonECS
public DeregisterTaskDefinitionResult deregisterTaskDefinition(DeregisterTaskDefinitionRequest request)
AmazonECS
Deregisters the specified task definition by family and revision. Upon deregistration, the task definition is
marked as INACTIVE
. Existing tasks and services that reference an INACTIVE
task
definition continue to run without disruption. Existing services that reference an INACTIVE
task
definition can still scale up or down by modifying the service's desired count.
You cannot use an INACTIVE
task definition to run new tasks or create new services, and you cannot
update an existing service to reference an INACTIVE
task definition (although there may be up to a
10 minute window following deregistration where these restrictions have not yet taken effect).
At this time, INACTIVE
task definitions remain discoverable in your account indefinitely; however,
this behavior is subject to change in the future, so you should not rely on INACTIVE
task
definitions persisting beyond the life cycle of any associated tasks and services.
deregisterTaskDefinition
in interface AmazonECS
public DescribeClustersResult describeClusters(DescribeClustersRequest request)
AmazonECS
Describes one or more of your clusters.
describeClusters
in interface AmazonECS
public DescribeClustersResult describeClusters()
AmazonECS
describeClusters
in interface AmazonECS
AmazonECS.describeClusters(DescribeClustersRequest)
public DescribeContainerInstancesResult describeContainerInstances(DescribeContainerInstancesRequest request)
AmazonECS
Describes Amazon EC2 Container Service container instances. Returns metadata about registered and remaining resources on each container instance requested.
describeContainerInstances
in interface AmazonECS
public DescribeServicesResult describeServices(DescribeServicesRequest request)
AmazonECS
Describes the specified services running in your cluster.
describeServices
in interface AmazonECS
public DescribeTaskDefinitionResult describeTaskDefinition(DescribeTaskDefinitionRequest request)
AmazonECS
Describes a task definition. You can specify a family
and revision
to find information
about a specific task definition, or you can simply specify the family to find the latest ACTIVE
revision in that family.
You can only describe INACTIVE
task definitions while an active task or service references them.
describeTaskDefinition
in interface AmazonECS
public DescribeTasksResult describeTasks(DescribeTasksRequest request)
AmazonECS
Describes a specified task or tasks.
describeTasks
in interface AmazonECS
public DiscoverPollEndpointResult discoverPollEndpoint(DiscoverPollEndpointRequest request)
AmazonECS
This action is only used by the Amazon EC2 Container Service agent, and it is not intended for use outside of the agent.
Returns an endpoint for the Amazon EC2 Container Service agent to poll for updates.
discoverPollEndpoint
in interface AmazonECS
public DiscoverPollEndpointResult discoverPollEndpoint()
AmazonECS
discoverPollEndpoint
in interface AmazonECS
AmazonECS.discoverPollEndpoint(DiscoverPollEndpointRequest)
public ListAttributesResult listAttributes(ListAttributesRequest request)
AmazonECS
Lists the attributes for Amazon ECS resources within a specified target type and cluster. When you specify a
target type and cluster, ListAttributes
returns a list of attribute objects, one for each attribute
on each resource. You can filter the list of results to a single attribute name to only return results that have
that name. You can also filter the results by attribute name and value, for example, to see which container
instances in a cluster are running a Linux AMI (ecs.os-type=linux
).
listAttributes
in interface AmazonECS
public ListClustersResult listClusters(ListClustersRequest request)
AmazonECS
Returns a list of existing clusters.
listClusters
in interface AmazonECS
public ListClustersResult listClusters()
AmazonECS
listClusters
in interface AmazonECS
AmazonECS.listClusters(ListClustersRequest)
public ListContainerInstancesResult listContainerInstances(ListContainerInstancesRequest request)
AmazonECS
Returns a list of container instances in a specified cluster. You can filter the results of a
ListContainerInstances
operation with cluster query language statements inside the
filter
parameter. For more information, see Cluster Query
Language in the Amazon EC2 Container Service Developer Guide.
listContainerInstances
in interface AmazonECS
public ListContainerInstancesResult listContainerInstances()
AmazonECS
listContainerInstances
in interface AmazonECS
AmazonECS.listContainerInstances(ListContainerInstancesRequest)
public ListServicesResult listServices(ListServicesRequest request)
AmazonECS
Lists the services that are running in a specified cluster.
listServices
in interface AmazonECS
public ListServicesResult listServices()
AmazonECS
listServices
in interface AmazonECS
AmazonECS.listServices(ListServicesRequest)
public ListTaskDefinitionFamiliesResult listTaskDefinitionFamilies(ListTaskDefinitionFamiliesRequest request)
AmazonECS
Returns a list of task definition families that are registered to your account (which may include task definition
families that no longer have any ACTIVE
task definition revisions).
You can filter out task definition families that do not contain any ACTIVE
task definition revisions
by setting the status
parameter to ACTIVE
. You can also filter the results with the
familyPrefix
parameter.
listTaskDefinitionFamilies
in interface AmazonECS
public ListTaskDefinitionFamiliesResult listTaskDefinitionFamilies()
AmazonECS
listTaskDefinitionFamilies
in interface AmazonECS
AmazonECS.listTaskDefinitionFamilies(ListTaskDefinitionFamiliesRequest)
public ListTaskDefinitionsResult listTaskDefinitions(ListTaskDefinitionsRequest request)
AmazonECS
Returns a list of task definitions that are registered to your account. You can filter the results by family name
with the familyPrefix
parameter or by status with the status
parameter.
listTaskDefinitions
in interface AmazonECS
public ListTaskDefinitionsResult listTaskDefinitions()
AmazonECS
listTaskDefinitions
in interface AmazonECS
AmazonECS.listTaskDefinitions(ListTaskDefinitionsRequest)
public ListTasksResult listTasks(ListTasksRequest request)
AmazonECS
Returns a list of tasks for a specified cluster. You can filter the results by family name, by a particular
container instance, or by the desired status of the task with the family
,
containerInstance
, and desiredStatus
parameters.
Recently-stopped tasks might appear in the returned results. Currently, stopped tasks appear in the returned results for at least one hour.
listTasks
in interface AmazonECS
public ListTasksResult listTasks()
AmazonECS
listTasks
in interface AmazonECS
AmazonECS.listTasks(ListTasksRequest)
public PutAttributesResult putAttributes(PutAttributesRequest request)
AmazonECS
Create or update an attribute on an Amazon ECS resource. If the attribute does not exist, it is created. If the attribute exists, its value is replaced with the specified value. To delete an attribute, use DeleteAttributes. For more information, see Attributes in the Amazon EC2 Container Service Developer Guide.
putAttributes
in interface AmazonECS
public RegisterContainerInstanceResult registerContainerInstance(RegisterContainerInstanceRequest request)
AmazonECS
This action is only used by the Amazon EC2 Container Service agent, and it is not intended for use outside of the agent.
Registers an EC2 instance into the specified cluster. This instance becomes available to place containers on.
registerContainerInstance
in interface AmazonECS
public RegisterTaskDefinitionResult registerTaskDefinition(RegisterTaskDefinitionRequest request)
AmazonECS
Registers a new task definition from the supplied family
and containerDefinitions
.
Optionally, you can add data volumes to your containers with the volumes
parameter. For more
information about task definition parameters and defaults, see Amazon ECS Task
Definitions in the Amazon EC2 Container Service Developer Guide.
You can specify an IAM role for your task with the taskRoleArn
parameter. When you specify an IAM
role for a task, its containers can then use the latest versions of the AWS CLI or SDKs to make API requests to
the AWS services that are specified in the IAM policy associated with the role. For more information, see IAM Roles for Tasks in
the Amazon EC2 Container Service Developer Guide.
You can specify a Docker networking mode for the containers in your task definition with the
networkMode
parameter. The available network modes correspond to those described in Network settings in the Docker run
reference.
registerTaskDefinition
in interface AmazonECS
public RunTaskResult runTask(RunTaskRequest request)
AmazonECS
Starts a new task using the specified task definition.
You can allow Amazon ECS to place tasks for you, or you can customize how Amazon ECS places tasks using placement constraints and placement strategies. For more information, see Scheduling Tasks in the Amazon EC2 Container Service Developer Guide.
Alternatively, you can use StartTask to use your own scheduler or place tasks manually on specific container instances.
runTask
in interface AmazonECS
public StartTaskResult startTask(StartTaskRequest request)
AmazonECS
Starts a new task from the specified task definition on the specified container instance or instances.
Alternatively, you can use RunTask to place tasks for you. For more information, see Scheduling Tasks in the Amazon EC2 Container Service Developer Guide.
startTask
in interface AmazonECS
public StopTaskResult stopTask(StopTaskRequest request)
AmazonECS
Stops a running task.
When StopTask is called on a task, the equivalent of docker stop
is issued to the containers
running in the task. This results in a SIGTERM
and a default 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.
The default 30-second timeout can be configured on the Amazon ECS container agent with the
ECS_CONTAINER_STOP_TIMEOUT
variable. For more information, see Amazon ECS Container
Agent Configuration in the Amazon EC2 Container Service Developer Guide.
stopTask
in interface AmazonECS
public SubmitContainerStateChangeResult submitContainerStateChange(SubmitContainerStateChangeRequest request)
AmazonECS
This action is only used by the Amazon EC2 Container Service agent, and it is not intended for use outside of the agent.
Sent to acknowledge that a container changed states.
submitContainerStateChange
in interface AmazonECS
public SubmitContainerStateChangeResult submitContainerStateChange()
AmazonECS
submitContainerStateChange
in interface AmazonECS
AmazonECS.submitContainerStateChange(SubmitContainerStateChangeRequest)
public SubmitTaskStateChangeResult submitTaskStateChange(SubmitTaskStateChangeRequest request)
AmazonECS
This action is only used by the Amazon EC2 Container Service agent, and it is not intended for use outside of the agent.
Sent to acknowledge that a task changed states.
submitTaskStateChange
in interface AmazonECS
public UpdateContainerAgentResult updateContainerAgent(UpdateContainerAgentRequest request)
AmazonECS
Updates the Amazon ECS container agent on a specified container instance. Updating the Amazon ECS container agent does not interrupt running tasks or services on the container instance. The process for updating the agent differs depending on whether your container instance was launched with the Amazon ECS-optimized AMI or another operating system.
UpdateContainerAgent
requires the Amazon ECS-optimized AMI or Amazon Linux with the
ecs-init
service installed and running. For help updating the Amazon ECS container agent on other
operating systems, see Manually Updating the Amazon ECS Container Agent in the Amazon EC2 Container Service Developer Guide.
updateContainerAgent
in interface AmazonECS
public UpdateContainerInstancesStateResult updateContainerInstancesState(UpdateContainerInstancesStateRequest request)
AmazonECS
Modifies the status of an Amazon ECS container instance.
You can change the status of a container instance to DRAINING
to manually remove an instance from a
cluster, for example to perform system updates, update the Docker daemon, or scale down the cluster size.
When you set a container instance to DRAINING
, Amazon ECS prevents new tasks from being scheduled
for placement on the container instance and replacement service tasks are started on other container instances in
the cluster if the resources are available. Service tasks on the container instance that are in the
PENDING
state are stopped immediately.
Service tasks on the container instance that are in the RUNNING
state are stopped and replaced
according the service's deployment configuration parameters, minimumHealthyPercent
and
maximumPercent
. Note that you can change the deployment configuration of your service using
UpdateService.
If minimumHealthyPercent
is below 100%, the scheduler can ignore desiredCount
temporarily during task replacement. For example, desiredCount
is four tasks, a minimum of 50%
allows the scheduler to stop two existing tasks before starting two new tasks. If the minimum is 100%, the
service scheduler can't remove existing tasks until the replacement tasks are considered healthy. 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 task
replacement, which enables you to define the replacement batch size. For example, if desiredCount
of
four tasks, a maximum of 200% starts four new tasks before stopping the four tasks to be drained (provided that
the cluster resources required to do this are available). If the maximum is 100%, then replacement tasks can't
start until the draining tasks have stopped.
Any PENDING
or RUNNING
tasks that do not belong to a service are not affected; you must
wait for them to finish or stop them manually.
A container instance has completed draining when it has no more RUNNING
tasks. You can verify this
using ListTasks.
When you set a container instance to ACTIVE
, the Amazon ECS scheduler can begin scheduling tasks on
the instance again.
updateContainerInstancesState
in interface AmazonECS
public UpdateServiceResult updateService(UpdateServiceRequest request)
AmazonECS
Modifies the desired count, deployment 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.
You can use UpdateService to modify your task definition and deploy a new version of your service.
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.
updateService
in interface AmazonECS
public void shutdown()
AmazonECS
public ResponseMetadata getCachedResponseMetadata(AmazonWebServiceRequest request)
AmazonECS
Response metadata is only cached for a limited period of time, so if you need to access this extra diagnostic information for an executed request, you should use this method to retrieve it as soon as possible after executing a request.
getCachedResponseMetadata
in interface AmazonECS
request
- The originally executed request.public AmazonECSWaiters waiters()
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