2018/05/22 - Amazon EC2 Container Service - 4 updated api methods
Changes Amazon Elastic Container Service (ECS) adds service discovery for services that use host or bridged network mode. ECS can now also register instance IPs for active tasks using bridged and host networking with Route 53, making them available via DNS.
{'serviceRegistries': {'containerName': 'string', 'containerPort': 'integer'}}
Response {'service': {'serviceRegistries': {'containerName': 'string',
'containerPort': 'integer'}}}
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 Elastic Container Service Developer Guide .
You can optionally specify a deployment configuration for your service. During a deployment, the service scheduler uses the minimumHealthyPercent and maximumPercent parameters to determine the deployment strategy. The deployment is triggered by changing the task definition or the desired count of a service with an UpdateService operation.
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, giving priority to instances that have the fewest number of running tasks for this service in their respective Availability Zone. 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.
See also: AWS API Documentation
Request Syntax
client.create_service(
cluster='string',
serviceName='string',
taskDefinition='string',
loadBalancers=[
{
'targetGroupArn': 'string',
'loadBalancerName': 'string',
'containerName': 'string',
'containerPort': 123
},
],
serviceRegistries=[
{
'registryArn': 'string',
'port': 123,
'containerName': 'string',
'containerPort': 123
},
],
desiredCount=123,
clientToken='string',
launchType='EC2'|'FARGATE',
platformVersion='string',
role='string',
deploymentConfiguration={
'maximumPercent': 123,
'minimumHealthyPercent': 123
},
placementConstraints=[
{
'type': 'distinctInstance'|'memberOf',
'expression': 'string'
},
],
placementStrategy=[
{
'type': 'random'|'spread'|'binpack',
'field': 'string'
},
],
networkConfiguration={
'awsvpcConfiguration': {
'subnets': [
'string',
],
'securityGroups': [
'string',
],
'assignPublicIp': 'ENABLED'|'DISABLED'
}
},
healthCheckGracePeriodSeconds=123
)
string
The short name or full Amazon Resource Name (ARN) of the cluster on which to run your service. If you do not specify a cluster, the default cluster is assumed.
string
[REQUIRED]
The name of your service. Up to 255 letters (uppercase and lowercase), numbers, hyphens, and underscores are allowed. Service names must be unique within a cluster, but you can have similarly named services in multiple clusters within a region or across multiple regions.
string
[REQUIRED]
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.
list
A load balancer object representing the load balancer to use with your service. Currently, you are limited to one load balancer or target group per service. After you create a service, the load balancer name or target group ARN, container name, and container port specified in the service definition are immutable.
For Classic Load Balancers, this object must contain the load balancer name, the container name (as it appears in a container definition), and the container port to access from the load balancer. When a task from this service is placed on a container instance, the container instance is registered with the load balancer specified here.
For Application Load Balancers and Network Load Balancers, this object must contain the load balancer target group ARN, the container name (as it appears in a container definition), and the container port to access from the load balancer. When a task from this service is placed on a container instance, the container instance and port combination is registered as a target in the target group specified here.
Services with tasks that use the awsvpc network mode (for example, those with the Fargate launch type) only support Application Load Balancers and Network Load Balancers; Classic Load Balancers are not supported. Also, when you create any target groups for these services, you must choose ip as the target type, not instance , because tasks that use the awsvpc network mode are associated with an elastic network interface, not an Amazon EC2 instance.
(dict) --
Details on a load balancer that is used with a service.
Services with tasks that use the awsvpc network mode (for example, those with the Fargate launch type) only support Application Load Balancers and Network Load Balancers; Classic Load Balancers are not supported. Also, when you create any target groups for these services, you must choose ip as the target type, not instance , because tasks that use the awsvpc network mode are associated with an elastic network interface, not an Amazon EC2 instance.
targetGroupArn (string) --
The full Amazon Resource Name (ARN) of the Elastic Load Balancing target group associated with a service.
Warning
If your service's task definition uses the awsvpc network mode (which is required for the Fargate launch type), you must choose ip as the target type, not instance , because tasks that use the awsvpc network mode are associated with an elastic network interface, not an Amazon EC2 instance.
loadBalancerName (string) --
The name of a load balancer.
containerName (string) --
The name of the container (as it appears in a container definition) to associate with the load balancer.
containerPort (integer) --
The port on the container to associate with the load balancer. This port must correspond to a containerPort in the service's task definition. Your container instances must allow ingress traffic on the hostPort of the port mapping.
list
The details of the service discovery registries you want to assign to this service. For more information, see Service Discovery.
Note
Service discovery is supported for Fargate tasks if using platform version v1.1.0 or later. For more information, see AWS Fargate Platform Versions.
(dict) --
Details of the service registry.
registryArn (string) --
The Amazon Resource Name (ARN) of the service registry. The currently supported service registry is Amazon Route 53 Auto Naming. For more information, see Service.
port (integer) --
The port value used if your service discovery service specified an SRV record. This field is required if both the awsvpc network mode and SRV records are used.
containerName (string) --
The container name value, already specified in the task definition, to be used for your service discovery service. If the task definition that your service task specifies uses the bridge or host network mode, you must specify a containerName and containerPort combination from the task definition. If the task definition that your service task specifies uses the awsvpc network mode and a type SRV DNS record is used, you must specify either a containerName and containerPort combination or a port value, but not both.
containerPort (integer) --
The port value, already specified in the task definition, to be used for your service discovery service. If the task definition your service task specifies uses the bridge or host network mode, you must specify a containerName and containerPort combination from the task definition. If the task definition your service task specifies uses the awsvpc network mode and a type SRV DNS record is used, you must specify either a containerName and containerPort combination or a port value, but not both.
integer
[REQUIRED]
The number of instantiations of the specified task definition to place and keep running on your cluster.
string
Unique, case-sensitive identifier that you provide to ensure the idempotency of the request. Up to 32 ASCII characters are allowed.
string
The launch type on which to run your service.
string
The platform version on which to run your service. If one is not specified, the latest version is used by default.
string
The name or full Amazon Resource Name (ARN) of the IAM role that allows Amazon ECS to make calls to your load balancer on your behalf. This parameter is only permitted if you are using a load balancer with your service and your task definition does not use the awsvpc network mode. If you specify the role parameter, you must also specify a load balancer object with the loadBalancers parameter.
Warning
If your account has already created the Amazon ECS service-linked role, that role is used by default for your service unless you specify a role here. The service-linked role is required if your task definition uses the awsvpc network mode, in which case you should not specify a role here. For more information, see Using Service-Linked Roles for Amazon ECS in the Amazon Elastic Container Service Developer Guide .
If your specified role has a path other than / , then you must either specify the full role ARN (this is recommended) or prefix the role name with the path. For example, if a role with the name bar has a path of /foo/ then you would specify /foo/bar as the role name. For more information, see Friendly Names and Paths in the IAM User Guide .
dict
Optional deployment parameters that control how many tasks run during the deployment and the ordering of stopping and starting tasks.
maximumPercent (integer) --
The upper limit (as a percentage of the service's desiredCount ) of the number of tasks that are allowed in the RUNNING or PENDING state in a service during a deployment. The maximum number of tasks during a deployment is the desiredCount multiplied by maximumPercent /100, rounded down to the nearest integer value.
minimumHealthyPercent (integer) --
The lower limit (as a percentage of the service's desiredCount ) of the number of running tasks that must remain in the RUNNING state in a service during a deployment. The minimum number of healthy tasks during a deployment is the desiredCount multiplied by minimumHealthyPercent /100, rounded up to the nearest integer value.
list
An array of placement constraint objects to use for tasks in your service. You can specify a maximum of 10 constraints per task (this limit includes constraints in the task definition and those specified at run time).
(dict) --
An object representing a constraint on task placement. For more information, see Task Placement Constraints in the Amazon Elastic Container Service Developer Guide .
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.
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 .
list
The placement strategy objects to use for tasks in your service. You can specify a maximum of five strategy rules per service.
(dict) --
The task placement strategy for a task or service. For more information, see Task Placement Strategies in the Amazon Elastic Container Service Developer Guide .
type (string) --
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 is 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).
field (string) --
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 is 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.
dict
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 .
awsvpcConfiguration (dict) --
The VPC subnets and security groups associated with a task.
subnets (list) -- [REQUIRED]
The subnets associated with the task or service. There is a limit of 10 subnets able to be specified per AwsVpcConfiguration.
(string) --
securityGroups (list) --
The security groups associated with the task or service. If you do not specify a security group, the default security group for the VPC is used. There is a limit of 5 security groups able to be specified per AwsVpcConfiguration.
(string) --
assignPublicIp (string) --
Whether the task's elastic network interface receives a public IP address.
integer
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 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.
dict
Response Syntax
{
'service': {
'serviceArn': 'string',
'serviceName': 'string',
'clusterArn': 'string',
'loadBalancers': [
{
'targetGroupArn': 'string',
'loadBalancerName': 'string',
'containerName': 'string',
'containerPort': 123
},
],
'serviceRegistries': [
{
'registryArn': 'string',
'port': 123,
'containerName': 'string',
'containerPort': 123
},
],
'status': 'string',
'desiredCount': 123,
'runningCount': 123,
'pendingCount': 123,
'launchType': 'EC2'|'FARGATE',
'platformVersion': 'string',
'taskDefinition': 'string',
'deploymentConfiguration': {
'maximumPercent': 123,
'minimumHealthyPercent': 123
},
'deployments': [
{
'id': 'string',
'status': 'string',
'taskDefinition': 'string',
'desiredCount': 123,
'pendingCount': 123,
'runningCount': 123,
'createdAt': datetime(2015, 1, 1),
'updatedAt': datetime(2015, 1, 1),
'launchType': 'EC2'|'FARGATE',
'platformVersion': 'string',
'networkConfiguration': {
'awsvpcConfiguration': {
'subnets': [
'string',
],
'securityGroups': [
'string',
],
'assignPublicIp': 'ENABLED'|'DISABLED'
}
}
},
],
'roleArn': 'string',
'events': [
{
'id': 'string',
'createdAt': datetime(2015, 1, 1),
'message': 'string'
},
],
'createdAt': datetime(2015, 1, 1),
'placementConstraints': [
{
'type': 'distinctInstance'|'memberOf',
'expression': 'string'
},
],
'placementStrategy': [
{
'type': 'random'|'spread'|'binpack',
'field': 'string'
},
],
'networkConfiguration': {
'awsvpcConfiguration': {
'subnets': [
'string',
],
'securityGroups': [
'string',
],
'assignPublicIp': 'ENABLED'|'DISABLED'
}
},
'healthCheckGracePeriodSeconds': 123
}
}
Response Structure
(dict) --
service (dict) --
The full description of your service following the create call.
serviceArn (string) --
The ARN that identifies the service. The ARN contains the arn:aws:ecs namespace, followed by the region of the service, the AWS account ID of the service owner, the service namespace, and then the service name. For example, arn:aws:ecs:region:012345678910:service/my-service .
serviceName (string) --
The name of your service. Up to 255 letters (uppercase and lowercase), numbers, hyphens, and underscores are allowed. Service names must be unique within a cluster, but you can have similarly named services in multiple clusters within a region or across multiple regions.
clusterArn (string) --
The Amazon Resource Name (ARN) of the cluster that hosts the service.
loadBalancers (list) --
A list of Elastic Load Balancing load balancer objects, containing the load balancer name, the container name (as it appears in a container definition), and the container port to access from the load balancer.
Services with tasks that use the awsvpc network mode (for example, those with the Fargate launch type) only support Application Load Balancers and Network Load Balancers; Classic Load Balancers are not supported. Also, when you create any target groups for these services, you must choose ip as the target type, not instance , because tasks that use the awsvpc network mode are associated with an elastic network interface, not an Amazon EC2 instance.
(dict) --
Details on a load balancer that is used with a service.
Services with tasks that use the awsvpc network mode (for example, those with the Fargate launch type) only support Application Load Balancers and Network Load Balancers; Classic Load Balancers are not supported. Also, when you create any target groups for these services, you must choose ip as the target type, not instance , because tasks that use the awsvpc network mode are associated with an elastic network interface, not an Amazon EC2 instance.
targetGroupArn (string) --
The full Amazon Resource Name (ARN) of the Elastic Load Balancing target group associated with a service.
Warning
If your service's task definition uses the awsvpc network mode (which is required for the Fargate launch type), you must choose ip as the target type, not instance , because tasks that use the awsvpc network mode are associated with an elastic network interface, not an Amazon EC2 instance.
loadBalancerName (string) --
The name of a load balancer.
containerName (string) --
The name of the container (as it appears in a container definition) to associate with the load balancer.
containerPort (integer) --
The port on the container to associate with the load balancer. This port must correspond to a containerPort in the service's task definition. Your container instances must allow ingress traffic on the hostPort of the port mapping.
serviceRegistries (list) --
(dict) --
Details of the service registry.
registryArn (string) --
The Amazon Resource Name (ARN) of the service registry. The currently supported service registry is Amazon Route 53 Auto Naming. For more information, see Service.
port (integer) --
The port value used if your service discovery service specified an SRV record. This field is required if both the awsvpc network mode and SRV records are used.
containerName (string) --
The container name value, already specified in the task definition, to be used for your service discovery service. If the task definition that your service task specifies uses the bridge or host network mode, you must specify a containerName and containerPort combination from the task definition. If the task definition that your service task specifies uses the awsvpc network mode and a type SRV DNS record is used, you must specify either a containerName and containerPort combination or a port value, but not both.
containerPort (integer) --
The port value, already specified in the task definition, to be used for your service discovery service. If the task definition your service task specifies uses the bridge or host network mode, you must specify a containerName and containerPort combination from the task definition. If the task definition your service task specifies uses the awsvpc network mode and a type SRV DNS record is used, you must specify either a containerName and containerPort combination or a port value, but not both.
status (string) --
The status of the service. The valid values are ACTIVE , DRAINING , or INACTIVE .
desiredCount (integer) --
The desired number of instantiations of the task definition to keep running on the service. This value is specified when the service is created with CreateService, and it can be modified with UpdateService.
runningCount (integer) --
The number of tasks in the cluster that are in the RUNNING state.
pendingCount (integer) --
The number of tasks in the cluster that are in the PENDING state.
launchType (string) --
The launch type on which your service is running.
platformVersion (string) --
The platform version on which your task is running. For more information, see AWS Fargate Platform Versions in the Amazon Elastic Container Service Developer Guide .
taskDefinition (string) --
The task definition to use for tasks in the service. This value is specified when the service is created with CreateService, and it can be modified with UpdateService.
deploymentConfiguration (dict) --
Optional deployment parameters that control how many tasks run during the deployment and the ordering of stopping and starting tasks.
maximumPercent (integer) --
The upper limit (as a percentage of the service's desiredCount ) of the number of tasks that are allowed in the RUNNING or PENDING state in a service during a deployment. The maximum number of tasks during a deployment is the desiredCount multiplied by maximumPercent /100, rounded down to the nearest integer value.
minimumHealthyPercent (integer) --
The lower limit (as a percentage of the service's desiredCount ) of the number of running tasks that must remain in the RUNNING state in a service during a deployment. The minimum number of healthy tasks during a deployment is the desiredCount multiplied by minimumHealthyPercent /100, rounded up to the nearest integer value.
deployments (list) --
The current state of deployments for the service.
(dict) --
The details of an Amazon ECS service deployment.
id (string) --
The ID of the deployment.
status (string) --
The status of the deployment. Valid values are PRIMARY (for the most recent deployment), ACTIVE (for previous deployments that still have tasks running, but are being replaced with the PRIMARY deployment), and INACTIVE (for deployments that have been completely replaced).
taskDefinition (string) --
The most recent task definition that was specified for the service to use.
desiredCount (integer) --
The most recent desired count of tasks that was specified for the service to deploy or maintain.
pendingCount (integer) --
The number of tasks in the deployment that are in the PENDING status.
runningCount (integer) --
The number of tasks in the deployment that are in the RUNNING status.
createdAt (datetime) --
The Unix time stamp for when the service was created.
updatedAt (datetime) --
The Unix time stamp for when the service was last updated.
launchType (string) --
The launch type on which your service is running.
platformVersion (string) --
The platform version on which your service is running.
networkConfiguration (dict) --
The VPC subnet and security group configuration for tasks that receive their own Elastic Network Interface by using the awsvpc networking mode.
awsvpcConfiguration (dict) --
The VPC subnets and security groups associated with a task.
subnets (list) --
The subnets associated with the task or service. There is a limit of 10 subnets able to be specified per AwsVpcConfiguration.
(string) --
securityGroups (list) --
The security groups associated with the task or service. If you do not specify a security group, the default security group for the VPC is used. There is a limit of 5 security groups able to be specified per AwsVpcConfiguration.
(string) --
assignPublicIp (string) --
Whether the task's elastic network interface receives a public IP address.
roleArn (string) --
The ARN of the IAM role associated with the service that allows the Amazon ECS container agent to register container instances with an Elastic Load Balancing load balancer.
events (list) --
The event stream for your service. A maximum of 100 of the latest events are displayed.
(dict) --
Details on an event associated with a service.
id (string) --
The ID string of the event.
createdAt (datetime) --
The Unix time stamp for when the event was triggered.
message (string) --
The event message.
createdAt (datetime) --
The Unix time stamp for when the service was created.
placementConstraints (list) --
The placement constraints for the tasks in the service.
(dict) --
An object representing a constraint on task placement. For more information, see Task Placement Constraints in the Amazon Elastic Container Service Developer Guide .
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.
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 .
placementStrategy (list) --
The placement strategy that determines how tasks for the service are placed.
(dict) --
The task placement strategy for a task or service. For more information, see Task Placement Strategies in the Amazon Elastic Container Service Developer Guide .
type (string) --
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 is 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).
field (string) --
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 is 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.
networkConfiguration (dict) --
The VPC subnet and security group configuration for tasks that receive their own Elastic Network Interface by using the awsvpc networking mode.
awsvpcConfiguration (dict) --
The VPC subnets and security groups associated with a task.
subnets (list) --
The subnets associated with the task or service. There is a limit of 10 subnets able to be specified per AwsVpcConfiguration.
(string) --
securityGroups (list) --
The security groups associated with the task or service. If you do not specify a security group, the default security group for the VPC is used. There is a limit of 5 security groups able to be specified per AwsVpcConfiguration.
(string) --
assignPublicIp (string) --
Whether the task's elastic network interface receives a public IP address.
healthCheckGracePeriodSeconds (integer) --
The period of time, in seconds, that the Amazon ECS service scheduler ignores unhealthy Elastic Load Balancing target health checks after a task has first started.
{'service': {'serviceRegistries': {'containerName': 'string',
'containerPort': 'integer'}}}
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.
Note
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 return a ServiceNotFoundException error.
See also: AWS API Documentation
Request Syntax
client.delete_service(
cluster='string',
service='string'
)
string
The short name or full Amazon Resource Name (ARN) of the cluster that hosts the service to delete. If you do not specify a cluster, the default cluster is assumed.
string
[REQUIRED]
The name of the service to delete.
dict
Response Syntax
{
'service': {
'serviceArn': 'string',
'serviceName': 'string',
'clusterArn': 'string',
'loadBalancers': [
{
'targetGroupArn': 'string',
'loadBalancerName': 'string',
'containerName': 'string',
'containerPort': 123
},
],
'serviceRegistries': [
{
'registryArn': 'string',
'port': 123,
'containerName': 'string',
'containerPort': 123
},
],
'status': 'string',
'desiredCount': 123,
'runningCount': 123,
'pendingCount': 123,
'launchType': 'EC2'|'FARGATE',
'platformVersion': 'string',
'taskDefinition': 'string',
'deploymentConfiguration': {
'maximumPercent': 123,
'minimumHealthyPercent': 123
},
'deployments': [
{
'id': 'string',
'status': 'string',
'taskDefinition': 'string',
'desiredCount': 123,
'pendingCount': 123,
'runningCount': 123,
'createdAt': datetime(2015, 1, 1),
'updatedAt': datetime(2015, 1, 1),
'launchType': 'EC2'|'FARGATE',
'platformVersion': 'string',
'networkConfiguration': {
'awsvpcConfiguration': {
'subnets': [
'string',
],
'securityGroups': [
'string',
],
'assignPublicIp': 'ENABLED'|'DISABLED'
}
}
},
],
'roleArn': 'string',
'events': [
{
'id': 'string',
'createdAt': datetime(2015, 1, 1),
'message': 'string'
},
],
'createdAt': datetime(2015, 1, 1),
'placementConstraints': [
{
'type': 'distinctInstance'|'memberOf',
'expression': 'string'
},
],
'placementStrategy': [
{
'type': 'random'|'spread'|'binpack',
'field': 'string'
},
],
'networkConfiguration': {
'awsvpcConfiguration': {
'subnets': [
'string',
],
'securityGroups': [
'string',
],
'assignPublicIp': 'ENABLED'|'DISABLED'
}
},
'healthCheckGracePeriodSeconds': 123
}
}
Response Structure
(dict) --
service (dict) --
The full description of the deleted service.
serviceArn (string) --
The ARN that identifies the service. The ARN contains the arn:aws:ecs namespace, followed by the region of the service, the AWS account ID of the service owner, the service namespace, and then the service name. For example, arn:aws:ecs:region:012345678910:service/my-service .
serviceName (string) --
The name of your service. Up to 255 letters (uppercase and lowercase), numbers, hyphens, and underscores are allowed. Service names must be unique within a cluster, but you can have similarly named services in multiple clusters within a region or across multiple regions.
clusterArn (string) --
The Amazon Resource Name (ARN) of the cluster that hosts the service.
loadBalancers (list) --
A list of Elastic Load Balancing load balancer objects, containing the load balancer name, the container name (as it appears in a container definition), and the container port to access from the load balancer.
Services with tasks that use the awsvpc network mode (for example, those with the Fargate launch type) only support Application Load Balancers and Network Load Balancers; Classic Load Balancers are not supported. Also, when you create any target groups for these services, you must choose ip as the target type, not instance , because tasks that use the awsvpc network mode are associated with an elastic network interface, not an Amazon EC2 instance.
(dict) --
Details on a load balancer that is used with a service.
Services with tasks that use the awsvpc network mode (for example, those with the Fargate launch type) only support Application Load Balancers and Network Load Balancers; Classic Load Balancers are not supported. Also, when you create any target groups for these services, you must choose ip as the target type, not instance , because tasks that use the awsvpc network mode are associated with an elastic network interface, not an Amazon EC2 instance.
targetGroupArn (string) --
The full Amazon Resource Name (ARN) of the Elastic Load Balancing target group associated with a service.
Warning
If your service's task definition uses the awsvpc network mode (which is required for the Fargate launch type), you must choose ip as the target type, not instance , because tasks that use the awsvpc network mode are associated with an elastic network interface, not an Amazon EC2 instance.
loadBalancerName (string) --
The name of a load balancer.
containerName (string) --
The name of the container (as it appears in a container definition) to associate with the load balancer.
containerPort (integer) --
The port on the container to associate with the load balancer. This port must correspond to a containerPort in the service's task definition. Your container instances must allow ingress traffic on the hostPort of the port mapping.
serviceRegistries (list) --
(dict) --
Details of the service registry.
registryArn (string) --
The Amazon Resource Name (ARN) of the service registry. The currently supported service registry is Amazon Route 53 Auto Naming. For more information, see Service.
port (integer) --
The port value used if your service discovery service specified an SRV record. This field is required if both the awsvpc network mode and SRV records are used.
containerName (string) --
The container name value, already specified in the task definition, to be used for your service discovery service. If the task definition that your service task specifies uses the bridge or host network mode, you must specify a containerName and containerPort combination from the task definition. If the task definition that your service task specifies uses the awsvpc network mode and a type SRV DNS record is used, you must specify either a containerName and containerPort combination or a port value, but not both.
containerPort (integer) --
The port value, already specified in the task definition, to be used for your service discovery service. If the task definition your service task specifies uses the bridge or host network mode, you must specify a containerName and containerPort combination from the task definition. If the task definition your service task specifies uses the awsvpc network mode and a type SRV DNS record is used, you must specify either a containerName and containerPort combination or a port value, but not both.
status (string) --
The status of the service. The valid values are ACTIVE , DRAINING , or INACTIVE .
desiredCount (integer) --
The desired number of instantiations of the task definition to keep running on the service. This value is specified when the service is created with CreateService, and it can be modified with UpdateService.
runningCount (integer) --
The number of tasks in the cluster that are in the RUNNING state.
pendingCount (integer) --
The number of tasks in the cluster that are in the PENDING state.
launchType (string) --
The launch type on which your service is running.
platformVersion (string) --
The platform version on which your task is running. For more information, see AWS Fargate Platform Versions in the Amazon Elastic Container Service Developer Guide .
taskDefinition (string) --
The task definition to use for tasks in the service. This value is specified when the service is created with CreateService, and it can be modified with UpdateService.
deploymentConfiguration (dict) --
Optional deployment parameters that control how many tasks run during the deployment and the ordering of stopping and starting tasks.
maximumPercent (integer) --
The upper limit (as a percentage of the service's desiredCount ) of the number of tasks that are allowed in the RUNNING or PENDING state in a service during a deployment. The maximum number of tasks during a deployment is the desiredCount multiplied by maximumPercent /100, rounded down to the nearest integer value.
minimumHealthyPercent (integer) --
The lower limit (as a percentage of the service's desiredCount ) of the number of running tasks that must remain in the RUNNING state in a service during a deployment. The minimum number of healthy tasks during a deployment is the desiredCount multiplied by minimumHealthyPercent /100, rounded up to the nearest integer value.
deployments (list) --
The current state of deployments for the service.
(dict) --
The details of an Amazon ECS service deployment.
id (string) --
The ID of the deployment.
status (string) --
The status of the deployment. Valid values are PRIMARY (for the most recent deployment), ACTIVE (for previous deployments that still have tasks running, but are being replaced with the PRIMARY deployment), and INACTIVE (for deployments that have been completely replaced).
taskDefinition (string) --
The most recent task definition that was specified for the service to use.
desiredCount (integer) --
The most recent desired count of tasks that was specified for the service to deploy or maintain.
pendingCount (integer) --
The number of tasks in the deployment that are in the PENDING status.
runningCount (integer) --
The number of tasks in the deployment that are in the RUNNING status.
createdAt (datetime) --
The Unix time stamp for when the service was created.
updatedAt (datetime) --
The Unix time stamp for when the service was last updated.
launchType (string) --
The launch type on which your service is running.
platformVersion (string) --
The platform version on which your service is running.
networkConfiguration (dict) --
The VPC subnet and security group configuration for tasks that receive their own Elastic Network Interface by using the awsvpc networking mode.
awsvpcConfiguration (dict) --
The VPC subnets and security groups associated with a task.
subnets (list) --
The subnets associated with the task or service. There is a limit of 10 subnets able to be specified per AwsVpcConfiguration.
(string) --
securityGroups (list) --
The security groups associated with the task or service. If you do not specify a security group, the default security group for the VPC is used. There is a limit of 5 security groups able to be specified per AwsVpcConfiguration.
(string) --
assignPublicIp (string) --
Whether the task's elastic network interface receives a public IP address.
roleArn (string) --
The ARN of the IAM role associated with the service that allows the Amazon ECS container agent to register container instances with an Elastic Load Balancing load balancer.
events (list) --
The event stream for your service. A maximum of 100 of the latest events are displayed.
(dict) --
Details on an event associated with a service.
id (string) --
The ID string of the event.
createdAt (datetime) --
The Unix time stamp for when the event was triggered.
message (string) --
The event message.
createdAt (datetime) --
The Unix time stamp for when the service was created.
placementConstraints (list) --
The placement constraints for the tasks in the service.
(dict) --
An object representing a constraint on task placement. For more information, see Task Placement Constraints in the Amazon Elastic Container Service Developer Guide .
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.
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 .
placementStrategy (list) --
The placement strategy that determines how tasks for the service are placed.
(dict) --
The task placement strategy for a task or service. For more information, see Task Placement Strategies in the Amazon Elastic Container Service Developer Guide .
type (string) --
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 is 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).
field (string) --
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 is 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.
networkConfiguration (dict) --
The VPC subnet and security group configuration for tasks that receive their own Elastic Network Interface by using the awsvpc networking mode.
awsvpcConfiguration (dict) --
The VPC subnets and security groups associated with a task.
subnets (list) --
The subnets associated with the task or service. There is a limit of 10 subnets able to be specified per AwsVpcConfiguration.
(string) --
securityGroups (list) --
The security groups associated with the task or service. If you do not specify a security group, the default security group for the VPC is used. There is a limit of 5 security groups able to be specified per AwsVpcConfiguration.
(string) --
assignPublicIp (string) --
Whether the task's elastic network interface receives a public IP address.
healthCheckGracePeriodSeconds (integer) --
The period of time, in seconds, that the Amazon ECS service scheduler ignores unhealthy Elastic Load Balancing target health checks after a task has first started.
{'services': {'serviceRegistries': {'containerName': 'string',
'containerPort': 'integer'}}}
Describes the specified services running in your cluster.
See also: AWS API Documentation
Request Syntax
client.describe_services(
cluster='string',
services=[
'string',
]
)
string
The short name or full Amazon Resource Name (ARN)the cluster that hosts the service to describe. If you do not specify a cluster, the default cluster is assumed.
list
[REQUIRED]
A list of services to describe. You may specify up to 10 services to describe in a single operation.
(string) --
dict
Response Syntax
{
'services': [
{
'serviceArn': 'string',
'serviceName': 'string',
'clusterArn': 'string',
'loadBalancers': [
{
'targetGroupArn': 'string',
'loadBalancerName': 'string',
'containerName': 'string',
'containerPort': 123
},
],
'serviceRegistries': [
{
'registryArn': 'string',
'port': 123,
'containerName': 'string',
'containerPort': 123
},
],
'status': 'string',
'desiredCount': 123,
'runningCount': 123,
'pendingCount': 123,
'launchType': 'EC2'|'FARGATE',
'platformVersion': 'string',
'taskDefinition': 'string',
'deploymentConfiguration': {
'maximumPercent': 123,
'minimumHealthyPercent': 123
},
'deployments': [
{
'id': 'string',
'status': 'string',
'taskDefinition': 'string',
'desiredCount': 123,
'pendingCount': 123,
'runningCount': 123,
'createdAt': datetime(2015, 1, 1),
'updatedAt': datetime(2015, 1, 1),
'launchType': 'EC2'|'FARGATE',
'platformVersion': 'string',
'networkConfiguration': {
'awsvpcConfiguration': {
'subnets': [
'string',
],
'securityGroups': [
'string',
],
'assignPublicIp': 'ENABLED'|'DISABLED'
}
}
},
],
'roleArn': 'string',
'events': [
{
'id': 'string',
'createdAt': datetime(2015, 1, 1),
'message': 'string'
},
],
'createdAt': datetime(2015, 1, 1),
'placementConstraints': [
{
'type': 'distinctInstance'|'memberOf',
'expression': 'string'
},
],
'placementStrategy': [
{
'type': 'random'|'spread'|'binpack',
'field': 'string'
},
],
'networkConfiguration': {
'awsvpcConfiguration': {
'subnets': [
'string',
],
'securityGroups': [
'string',
],
'assignPublicIp': 'ENABLED'|'DISABLED'
}
},
'healthCheckGracePeriodSeconds': 123
},
],
'failures': [
{
'arn': 'string',
'reason': 'string'
},
]
}
Response Structure
(dict) --
services (list) --
The list of services described.
(dict) --
Details on a service within a cluster
serviceArn (string) --
The ARN that identifies the service. The ARN contains the arn:aws:ecs namespace, followed by the region of the service, the AWS account ID of the service owner, the service namespace, and then the service name. For example, arn:aws:ecs:region:012345678910:service/my-service .
serviceName (string) --
The name of your service. Up to 255 letters (uppercase and lowercase), numbers, hyphens, and underscores are allowed. Service names must be unique within a cluster, but you can have similarly named services in multiple clusters within a region or across multiple regions.
clusterArn (string) --
The Amazon Resource Name (ARN) of the cluster that hosts the service.
loadBalancers (list) --
A list of Elastic Load Balancing load balancer objects, containing the load balancer name, the container name (as it appears in a container definition), and the container port to access from the load balancer.
Services with tasks that use the awsvpc network mode (for example, those with the Fargate launch type) only support Application Load Balancers and Network Load Balancers; Classic Load Balancers are not supported. Also, when you create any target groups for these services, you must choose ip as the target type, not instance , because tasks that use the awsvpc network mode are associated with an elastic network interface, not an Amazon EC2 instance.
(dict) --
Details on a load balancer that is used with a service.
Services with tasks that use the awsvpc network mode (for example, those with the Fargate launch type) only support Application Load Balancers and Network Load Balancers; Classic Load Balancers are not supported. Also, when you create any target groups for these services, you must choose ip as the target type, not instance , because tasks that use the awsvpc network mode are associated with an elastic network interface, not an Amazon EC2 instance.
targetGroupArn (string) --
The full Amazon Resource Name (ARN) of the Elastic Load Balancing target group associated with a service.
Warning
If your service's task definition uses the awsvpc network mode (which is required for the Fargate launch type), you must choose ip as the target type, not instance , because tasks that use the awsvpc network mode are associated with an elastic network interface, not an Amazon EC2 instance.
loadBalancerName (string) --
The name of a load balancer.
containerName (string) --
The name of the container (as it appears in a container definition) to associate with the load balancer.
containerPort (integer) --
The port on the container to associate with the load balancer. This port must correspond to a containerPort in the service's task definition. Your container instances must allow ingress traffic on the hostPort of the port mapping.
serviceRegistries (list) --
(dict) --
Details of the service registry.
registryArn (string) --
The Amazon Resource Name (ARN) of the service registry. The currently supported service registry is Amazon Route 53 Auto Naming. For more information, see Service.
port (integer) --
The port value used if your service discovery service specified an SRV record. This field is required if both the awsvpc network mode and SRV records are used.
containerName (string) --
The container name value, already specified in the task definition, to be used for your service discovery service. If the task definition that your service task specifies uses the bridge or host network mode, you must specify a containerName and containerPort combination from the task definition. If the task definition that your service task specifies uses the awsvpc network mode and a type SRV DNS record is used, you must specify either a containerName and containerPort combination or a port value, but not both.
containerPort (integer) --
The port value, already specified in the task definition, to be used for your service discovery service. If the task definition your service task specifies uses the bridge or host network mode, you must specify a containerName and containerPort combination from the task definition. If the task definition your service task specifies uses the awsvpc network mode and a type SRV DNS record is used, you must specify either a containerName and containerPort combination or a port value, but not both.
status (string) --
The status of the service. The valid values are ACTIVE , DRAINING , or INACTIVE .
desiredCount (integer) --
The desired number of instantiations of the task definition to keep running on the service. This value is specified when the service is created with CreateService, and it can be modified with UpdateService.
runningCount (integer) --
The number of tasks in the cluster that are in the RUNNING state.
pendingCount (integer) --
The number of tasks in the cluster that are in the PENDING state.
launchType (string) --
The launch type on which your service is running.
platformVersion (string) --
The platform version on which your task is running. For more information, see AWS Fargate Platform Versions in the Amazon Elastic Container Service Developer Guide .
taskDefinition (string) --
The task definition to use for tasks in the service. This value is specified when the service is created with CreateService, and it can be modified with UpdateService.
deploymentConfiguration (dict) --
Optional deployment parameters that control how many tasks run during the deployment and the ordering of stopping and starting tasks.
maximumPercent (integer) --
The upper limit (as a percentage of the service's desiredCount ) of the number of tasks that are allowed in the RUNNING or PENDING state in a service during a deployment. The maximum number of tasks during a deployment is the desiredCount multiplied by maximumPercent /100, rounded down to the nearest integer value.
minimumHealthyPercent (integer) --
The lower limit (as a percentage of the service's desiredCount ) of the number of running tasks that must remain in the RUNNING state in a service during a deployment. The minimum number of healthy tasks during a deployment is the desiredCount multiplied by minimumHealthyPercent /100, rounded up to the nearest integer value.
deployments (list) --
The current state of deployments for the service.
(dict) --
The details of an Amazon ECS service deployment.
id (string) --
The ID of the deployment.
status (string) --
The status of the deployment. Valid values are PRIMARY (for the most recent deployment), ACTIVE (for previous deployments that still have tasks running, but are being replaced with the PRIMARY deployment), and INACTIVE (for deployments that have been completely replaced).
taskDefinition (string) --
The most recent task definition that was specified for the service to use.
desiredCount (integer) --
The most recent desired count of tasks that was specified for the service to deploy or maintain.
pendingCount (integer) --
The number of tasks in the deployment that are in the PENDING status.
runningCount (integer) --
The number of tasks in the deployment that are in the RUNNING status.
createdAt (datetime) --
The Unix time stamp for when the service was created.
updatedAt (datetime) --
The Unix time stamp for when the service was last updated.
launchType (string) --
The launch type on which your service is running.
platformVersion (string) --
The platform version on which your service is running.
networkConfiguration (dict) --
The VPC subnet and security group configuration for tasks that receive their own Elastic Network Interface by using the awsvpc networking mode.
awsvpcConfiguration (dict) --
The VPC subnets and security groups associated with a task.
subnets (list) --
The subnets associated with the task or service. There is a limit of 10 subnets able to be specified per AwsVpcConfiguration.
(string) --
securityGroups (list) --
The security groups associated with the task or service. If you do not specify a security group, the default security group for the VPC is used. There is a limit of 5 security groups able to be specified per AwsVpcConfiguration.
(string) --
assignPublicIp (string) --
Whether the task's elastic network interface receives a public IP address.
roleArn (string) --
The ARN of the IAM role associated with the service that allows the Amazon ECS container agent to register container instances with an Elastic Load Balancing load balancer.
events (list) --
The event stream for your service. A maximum of 100 of the latest events are displayed.
(dict) --
Details on an event associated with a service.
id (string) --
The ID string of the event.
createdAt (datetime) --
The Unix time stamp for when the event was triggered.
message (string) --
The event message.
createdAt (datetime) --
The Unix time stamp for when the service was created.
placementConstraints (list) --
The placement constraints for the tasks in the service.
(dict) --
An object representing a constraint on task placement. For more information, see Task Placement Constraints in the Amazon Elastic Container Service Developer Guide .
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.
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 .
placementStrategy (list) --
The placement strategy that determines how tasks for the service are placed.
(dict) --
The task placement strategy for a task or service. For more information, see Task Placement Strategies in the Amazon Elastic Container Service Developer Guide .
type (string) --
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 is 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).
field (string) --
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 is 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.
networkConfiguration (dict) --
The VPC subnet and security group configuration for tasks that receive their own Elastic Network Interface by using the awsvpc networking mode.
awsvpcConfiguration (dict) --
The VPC subnets and security groups associated with a task.
subnets (list) --
The subnets associated with the task or service. There is a limit of 10 subnets able to be specified per AwsVpcConfiguration.
(string) --
securityGroups (list) --
The security groups associated with the task or service. If you do not specify a security group, the default security group for the VPC is used. There is a limit of 5 security groups able to be specified per AwsVpcConfiguration.
(string) --
assignPublicIp (string) --
Whether the task's elastic network interface receives a public IP address.
healthCheckGracePeriodSeconds (integer) --
The period of time, in seconds, that the Amazon ECS service scheduler ignores unhealthy Elastic Load Balancing target health checks after a task has first started.
failures (list) --
Any failures associated with the call.
(dict) --
A failed resource.
arn (string) --
The Amazon Resource Name (ARN) of the failed resource.
reason (string) --
The reason for the failure.
{'service': {'serviceRegistries': {'containerName': 'string',
'containerPort': 'integer'}}}
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.
Note
If your updated Docker image uses the same tag as what is in the existing task definition for your service (for example, my_image:latest ), you do not need to create a new revision of your task definition. You can update the service using the forceNewDeployment option. The new tasks launched by the deployment pull the current image/tag combination from your repository when they start.
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.
See also: AWS API Documentation
Request Syntax
client.update_service(
cluster='string',
service='string',
desiredCount=123,
taskDefinition='string',
deploymentConfiguration={
'maximumPercent': 123,
'minimumHealthyPercent': 123
},
networkConfiguration={
'awsvpcConfiguration': {
'subnets': [
'string',
],
'securityGroups': [
'string',
],
'assignPublicIp': 'ENABLED'|'DISABLED'
}
},
platformVersion='string',
forceNewDeployment=True|False,
healthCheckGracePeriodSeconds=123
)
string
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.
string
[REQUIRED]
The name of the service to update.
integer
The number of instantiations of the task to place and keep running in your service.
string
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.
dict
Optional deployment parameters that control how many tasks run during the deployment and the ordering of stopping and starting tasks.
maximumPercent (integer) --
The upper limit (as a percentage of the service's desiredCount ) of the number of tasks that are allowed in the RUNNING or PENDING state in a service during a deployment. The maximum number of tasks during a deployment is the desiredCount multiplied by maximumPercent /100, rounded down to the nearest integer value.
minimumHealthyPercent (integer) --
The lower limit (as a percentage of the service's desiredCount ) of the number of running tasks that must remain in the RUNNING state in a service during a deployment. The minimum number of healthy tasks during a deployment is the desiredCount multiplied by minimumHealthyPercent /100, rounded up to the nearest integer value.
dict
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 .
Note
Updating a service to add a subnet to a list of existing subnets does not trigger a service deployment. For example, if your network configuration change is to keep the existing subnets and simply add another subnet to the network configuration, this does not trigger a new service deployment.
awsvpcConfiguration (dict) --
The VPC subnets and security groups associated with a task.
subnets (list) -- [REQUIRED]
The subnets associated with the task or service. There is a limit of 10 subnets able to be specified per AwsVpcConfiguration.
(string) --
securityGroups (list) --
The security groups associated with the task or service. If you do not specify a security group, the default security group for the VPC is used. There is a limit of 5 security groups able to be specified per AwsVpcConfiguration.
(string) --
assignPublicIp (string) --
Whether the task's elastic network interface receives a public IP address.
string
The platform version you want to update your service to run.
boolean
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.
integer
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.
dict
Response Syntax
{
'service': {
'serviceArn': 'string',
'serviceName': 'string',
'clusterArn': 'string',
'loadBalancers': [
{
'targetGroupArn': 'string',
'loadBalancerName': 'string',
'containerName': 'string',
'containerPort': 123
},
],
'serviceRegistries': [
{
'registryArn': 'string',
'port': 123,
'containerName': 'string',
'containerPort': 123
},
],
'status': 'string',
'desiredCount': 123,
'runningCount': 123,
'pendingCount': 123,
'launchType': 'EC2'|'FARGATE',
'platformVersion': 'string',
'taskDefinition': 'string',
'deploymentConfiguration': {
'maximumPercent': 123,
'minimumHealthyPercent': 123
},
'deployments': [
{
'id': 'string',
'status': 'string',
'taskDefinition': 'string',
'desiredCount': 123,
'pendingCount': 123,
'runningCount': 123,
'createdAt': datetime(2015, 1, 1),
'updatedAt': datetime(2015, 1, 1),
'launchType': 'EC2'|'FARGATE',
'platformVersion': 'string',
'networkConfiguration': {
'awsvpcConfiguration': {
'subnets': [
'string',
],
'securityGroups': [
'string',
],
'assignPublicIp': 'ENABLED'|'DISABLED'
}
}
},
],
'roleArn': 'string',
'events': [
{
'id': 'string',
'createdAt': datetime(2015, 1, 1),
'message': 'string'
},
],
'createdAt': datetime(2015, 1, 1),
'placementConstraints': [
{
'type': 'distinctInstance'|'memberOf',
'expression': 'string'
},
],
'placementStrategy': [
{
'type': 'random'|'spread'|'binpack',
'field': 'string'
},
],
'networkConfiguration': {
'awsvpcConfiguration': {
'subnets': [
'string',
],
'securityGroups': [
'string',
],
'assignPublicIp': 'ENABLED'|'DISABLED'
}
},
'healthCheckGracePeriodSeconds': 123
}
}
Response Structure
(dict) --
service (dict) --
The full description of your service following the update call.
serviceArn (string) --
The ARN that identifies the service. The ARN contains the arn:aws:ecs namespace, followed by the region of the service, the AWS account ID of the service owner, the service namespace, and then the service name. For example, arn:aws:ecs:region:012345678910:service/my-service .
serviceName (string) --
The name of your service. Up to 255 letters (uppercase and lowercase), numbers, hyphens, and underscores are allowed. Service names must be unique within a cluster, but you can have similarly named services in multiple clusters within a region or across multiple regions.
clusterArn (string) --
The Amazon Resource Name (ARN) of the cluster that hosts the service.
loadBalancers (list) --
A list of Elastic Load Balancing load balancer objects, containing the load balancer name, the container name (as it appears in a container definition), and the container port to access from the load balancer.
Services with tasks that use the awsvpc network mode (for example, those with the Fargate launch type) only support Application Load Balancers and Network Load Balancers; Classic Load Balancers are not supported. Also, when you create any target groups for these services, you must choose ip as the target type, not instance , because tasks that use the awsvpc network mode are associated with an elastic network interface, not an Amazon EC2 instance.
(dict) --
Details on a load balancer that is used with a service.
Services with tasks that use the awsvpc network mode (for example, those with the Fargate launch type) only support Application Load Balancers and Network Load Balancers; Classic Load Balancers are not supported. Also, when you create any target groups for these services, you must choose ip as the target type, not instance , because tasks that use the awsvpc network mode are associated with an elastic network interface, not an Amazon EC2 instance.
targetGroupArn (string) --
The full Amazon Resource Name (ARN) of the Elastic Load Balancing target group associated with a service.
Warning
If your service's task definition uses the awsvpc network mode (which is required for the Fargate launch type), you must choose ip as the target type, not instance , because tasks that use the awsvpc network mode are associated with an elastic network interface, not an Amazon EC2 instance.
loadBalancerName (string) --
The name of a load balancer.
containerName (string) --
The name of the container (as it appears in a container definition) to associate with the load balancer.
containerPort (integer) --
The port on the container to associate with the load balancer. This port must correspond to a containerPort in the service's task definition. Your container instances must allow ingress traffic on the hostPort of the port mapping.
serviceRegistries (list) --
(dict) --
Details of the service registry.
registryArn (string) --
The Amazon Resource Name (ARN) of the service registry. The currently supported service registry is Amazon Route 53 Auto Naming. For more information, see Service.
port (integer) --
The port value used if your service discovery service specified an SRV record. This field is required if both the awsvpc network mode and SRV records are used.
containerName (string) --
The container name value, already specified in the task definition, to be used for your service discovery service. If the task definition that your service task specifies uses the bridge or host network mode, you must specify a containerName and containerPort combination from the task definition. If the task definition that your service task specifies uses the awsvpc network mode and a type SRV DNS record is used, you must specify either a containerName and containerPort combination or a port value, but not both.
containerPort (integer) --
The port value, already specified in the task definition, to be used for your service discovery service. If the task definition your service task specifies uses the bridge or host network mode, you must specify a containerName and containerPort combination from the task definition. If the task definition your service task specifies uses the awsvpc network mode and a type SRV DNS record is used, you must specify either a containerName and containerPort combination or a port value, but not both.
status (string) --
The status of the service. The valid values are ACTIVE , DRAINING , or INACTIVE .
desiredCount (integer) --
The desired number of instantiations of the task definition to keep running on the service. This value is specified when the service is created with CreateService, and it can be modified with UpdateService.
runningCount (integer) --
The number of tasks in the cluster that are in the RUNNING state.
pendingCount (integer) --
The number of tasks in the cluster that are in the PENDING state.
launchType (string) --
The launch type on which your service is running.
platformVersion (string) --
The platform version on which your task is running. For more information, see AWS Fargate Platform Versions in the Amazon Elastic Container Service Developer Guide .
taskDefinition (string) --
The task definition to use for tasks in the service. This value is specified when the service is created with CreateService, and it can be modified with UpdateService.
deploymentConfiguration (dict) --
Optional deployment parameters that control how many tasks run during the deployment and the ordering of stopping and starting tasks.
maximumPercent (integer) --
The upper limit (as a percentage of the service's desiredCount ) of the number of tasks that are allowed in the RUNNING or PENDING state in a service during a deployment. The maximum number of tasks during a deployment is the desiredCount multiplied by maximumPercent /100, rounded down to the nearest integer value.
minimumHealthyPercent (integer) --
The lower limit (as a percentage of the service's desiredCount ) of the number of running tasks that must remain in the RUNNING state in a service during a deployment. The minimum number of healthy tasks during a deployment is the desiredCount multiplied by minimumHealthyPercent /100, rounded up to the nearest integer value.
deployments (list) --
The current state of deployments for the service.
(dict) --
The details of an Amazon ECS service deployment.
id (string) --
The ID of the deployment.
status (string) --
The status of the deployment. Valid values are PRIMARY (for the most recent deployment), ACTIVE (for previous deployments that still have tasks running, but are being replaced with the PRIMARY deployment), and INACTIVE (for deployments that have been completely replaced).
taskDefinition (string) --
The most recent task definition that was specified for the service to use.
desiredCount (integer) --
The most recent desired count of tasks that was specified for the service to deploy or maintain.
pendingCount (integer) --
The number of tasks in the deployment that are in the PENDING status.
runningCount (integer) --
The number of tasks in the deployment that are in the RUNNING status.
createdAt (datetime) --
The Unix time stamp for when the service was created.
updatedAt (datetime) --
The Unix time stamp for when the service was last updated.
launchType (string) --
The launch type on which your service is running.
platformVersion (string) --
The platform version on which your service is running.
networkConfiguration (dict) --
The VPC subnet and security group configuration for tasks that receive their own Elastic Network Interface by using the awsvpc networking mode.
awsvpcConfiguration (dict) --
The VPC subnets and security groups associated with a task.
subnets (list) --
The subnets associated with the task or service. There is a limit of 10 subnets able to be specified per AwsVpcConfiguration.
(string) --
securityGroups (list) --
The security groups associated with the task or service. If you do not specify a security group, the default security group for the VPC is used. There is a limit of 5 security groups able to be specified per AwsVpcConfiguration.
(string) --
assignPublicIp (string) --
Whether the task's elastic network interface receives a public IP address.
roleArn (string) --
The ARN of the IAM role associated with the service that allows the Amazon ECS container agent to register container instances with an Elastic Load Balancing load balancer.
events (list) --
The event stream for your service. A maximum of 100 of the latest events are displayed.
(dict) --
Details on an event associated with a service.
id (string) --
The ID string of the event.
createdAt (datetime) --
The Unix time stamp for when the event was triggered.
message (string) --
The event message.
createdAt (datetime) --
The Unix time stamp for when the service was created.
placementConstraints (list) --
The placement constraints for the tasks in the service.
(dict) --
An object representing a constraint on task placement. For more information, see Task Placement Constraints in the Amazon Elastic Container Service Developer Guide .
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.
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 .
placementStrategy (list) --
The placement strategy that determines how tasks for the service are placed.
(dict) --
The task placement strategy for a task or service. For more information, see Task Placement Strategies in the Amazon Elastic Container Service Developer Guide .
type (string) --
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 is 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).
field (string) --
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 is 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.
networkConfiguration (dict) --
The VPC subnet and security group configuration for tasks that receive their own Elastic Network Interface by using the awsvpc networking mode.
awsvpcConfiguration (dict) --
The VPC subnets and security groups associated with a task.
subnets (list) --
The subnets associated with the task or service. There is a limit of 10 subnets able to be specified per AwsVpcConfiguration.
(string) --
securityGroups (list) --
The security groups associated with the task or service. If you do not specify a security group, the default security group for the VPC is used. There is a limit of 5 security groups able to be specified per AwsVpcConfiguration.
(string) --
assignPublicIp (string) --
Whether the task's elastic network interface receives a public IP address.
healthCheckGracePeriodSeconds (integer) --
The period of time, in seconds, that the Amazon ECS service scheduler ignores unhealthy Elastic Load Balancing target health checks after a task has first started.