AWS CLI Command Reference

[ aws . ecs ]

describe-clusters

Description

Describes one or more of your clusters.

See also: AWS API Documentation

See ‘aws help’ for descriptions of global parameters.

Synopsis

  describe-clusters
[--clusters <value>]
[--include <value>]
[--cli-input-json | --cli-input-yaml]
[--generate-cli-skeleton <value>]

Options

--clusters (list)

A list of up to 100 cluster names or full cluster Amazon Resource Name (ARN) entries. If you do not specify a cluster, the default cluster is assumed.

(string)

Syntax:

"string" "string" ...

--include (list)

Determines whether to include additional information about the clusters in the response. If this field is omitted, this information isn’t included.

If ATTACHMENTS is specified, the attachments for the container instances or tasks within the cluster are included.

If SETTINGS is specified, the settings for the cluster are included.

If CONFIGURATIONS is specified, the configuration for the cluster is included.

If STATISTICS is specified, the task and service count is included, separated by launch type.

If TAGS is specified, the metadata tags associated with the cluster are included.

(string)

Syntax:

"string" "string" ...

Where valid values are:
  ATTACHMENTS
  CONFIGURATIONS
  SETTINGS
  STATISTICS
  TAGS

--cli-input-json | --cli-input-yaml (string) Reads arguments from the JSON string provided. The JSON string follows the format provided by --generate-cli-skeleton. If other arguments are provided on the command line, those values will override the JSON-provided values. It is not possible to pass arbitrary binary values using a JSON-provided value as the string will be taken literally. This may not be specified along with --cli-input-yaml.

--generate-cli-skeleton (string) Prints a JSON skeleton to standard output without sending an API request. If provided with no value or the value input, prints a sample input JSON that can be used as an argument for --cli-input-json. Similarly, if provided yaml-input it will print a sample input YAML that can be used with --cli-input-yaml. If provided with the value output, it validates the command inputs and returns a sample output JSON for that command.

See ‘aws help’ for descriptions of global parameters.

Examples

Example 1: To describe a cluster

The following describe-clusters example retrieves details about the specified cluster.

aws ecs describe-clusters \
    --cluster default

Output:

{
    "clusters": [
        {
            "status": "ACTIVE",
            "clusterName": "default",
            "registeredContainerInstancesCount": 0,
            "pendingTasksCount": 0,
            "runningTasksCount": 0,
            "activeServicesCount": 1,
            "clusterArn": "arn:aws:ecs:us-west-2:123456789012:cluster/default"
        }
    ],
    "failures": []
}

For more information, see Amazon ECS Clusters in the Amazon ECS Developer Guide.

Example 2: To describe a cluster with the attachment option

The following describe-clusters example specifies the ATTACHMENTS option. It retrieves details about the specified cluster and a list of resources attached to the cluster in the form of attachments. When using a capacity provider with a cluster, the resources, either AutoScaling plans or scaling policies, will be represented as asp or as_policy ATTACHMENTS.

aws ecs describe-clusters \
    --include ATTACHMENTS \
    --clusters sampleCluster

Output:

{
    "clusters": [
        {
            "clusterArn": "arn:aws:ecs:af-south-1:123456789222:cluster/sampleCluster",
            "clusterName": "sampleCluster",
            "status": "ACTIVE",
            "registeredContainerInstancesCount": 0,
            "runningTasksCount": 0,
            "pendingTasksCount": 0,
            "activeServicesCount": 0,
            "statistics": [],
            "tags": [],
            "settings": [],
            "capacityProviders": [
                "sampleCapacityProvider"
            ],
            "defaultCapacityProviderStrategy": [],
            "attachments": [
                {
                    "id": "a1b2c3d4-5678-901b-cdef-EXAMPLE22222",
                    "type": "as_policy",
                    "status": "CREATED",
                    "details": [
                        {
                            "name": "capacityProviderName",
                            "value": "sampleCapacityProvider"
                        },
                        {
                            "name": "scalingPolicyName",
                            "value": "ECSManagedAutoScalingPolicy-3048e262-fe39-4eaf-826d-6f975d303188"
                        }
                    ]
                }
            ],
            "attachmentsStatus": "UPDATE_COMPLETE"
        }
    ],
    "failures": []
}

For more information, see Amazon ECS Clusters in the Amazon ECS Developer Guide.

Output

clusters -> (list)

The list of clusters.

(structure)

A regional grouping of one or more container instances where you can run task requests. Each account receives a default cluster the first time you use the Amazon ECS service, but you may also create other clusters. Clusters may contain more than one instance type simultaneously.

clusterArn -> (string)

The Amazon Resource Name (ARN) that identifies the cluster. For more information about the ARN format, see Amazon Resource Name (ARN) in the Amazon ECS Developer Guide .

clusterName -> (string)

A user-generated string that you use to identify your cluster.

configuration -> (structure)

The execute command configuration for the cluster.

executeCommandConfiguration -> (structure)

The details of the execute command configuration.

kmsKeyId -> (string)

Specify an Key Management Service key ID to encrypt the data between the local client and the container.

logging -> (string)

The log setting to use for redirecting logs for your execute command results. The following log settings are available.

  • NONE : The execute command session is not logged.

  • DEFAULT : The awslogs configuration in the task definition is used. If no logging parameter is specified, it defaults to this value. If no awslogs log driver is configured in the task definition, the output won’t be logged.

  • OVERRIDE : Specify the logging details as a part of logConfiguration . If the OVERRIDE logging option is specified, the logConfiguration is required.

logConfiguration -> (structure)

The log configuration for the results of the execute command actions. The logs can be sent to CloudWatch Logs or an Amazon S3 bucket. When logging=OVERRIDE is specified, a logConfiguration must be provided.

cloudWatchLogGroupName -> (string)

The name of the CloudWatch log group to send logs to.

Note

The CloudWatch log group must already be created.

cloudWatchEncryptionEnabled -> (boolean)

Determines whether to use encryption on the CloudWatch logs. If not specified, encryption will be disabled.

s3BucketName -> (string)

The name of the S3 bucket to send logs to.

Note

The S3 bucket must already be created.

s3EncryptionEnabled -> (boolean)

Determines whether to use encryption on the S3 logs. If not specified, encryption is not used.

s3KeyPrefix -> (string)

An optional folder in the S3 bucket to place logs in.

status -> (string)

The status of the cluster. The following are the possible states that are returned.

ACTIVE

The cluster is ready to accept tasks and if applicable you can register container instances with the cluster.

PROVISIONING

The cluster has capacity providers that are associated with it and the resources needed for the capacity provider are being created.

DEPROVISIONING

The cluster has capacity providers that are associated with it and the resources needed for the capacity provider are being deleted.

FAILED

The cluster has capacity providers that are associated with it and the resources needed for the capacity provider have failed to create.

INACTIVE

The cluster has been deleted. Clusters with an INACTIVE status may remain discoverable in your account for a period of time. However, this behavior is subject to change in the future. We don’t recommend that you rely on INACTIVE clusters persisting.

registeredContainerInstancesCount -> (integer)

The number of container instances registered into the cluster. This includes container instances in both ACTIVE and DRAINING status.

runningTasksCount -> (integer)

The number of tasks in the cluster that are in the RUNNING state.

pendingTasksCount -> (integer)

The number of tasks in the cluster that are in the PENDING state.

activeServicesCount -> (integer)

The number of services that are running on the cluster in an ACTIVE state. You can view these services with ListServices .

statistics -> (list)

Additional information about your clusters that are separated by launch type. They include the following:

  • runningEC2TasksCount

  • RunningFargateTasksCount

  • pendingEC2TasksCount

  • pendingFargateTasksCount

  • activeEC2ServiceCount

  • activeFargateServiceCount

  • drainingEC2ServiceCount

  • drainingFargateServiceCount

(structure)

A key-value pair object.

name -> (string)

The name of the key-value pair. For environment variables, this is the name of the environment variable.

value -> (string)

The value of the key-value pair. For environment variables, this is the value of the environment variable.

tags -> (list)

The metadata that you apply to the cluster to help you categorize and organize them. Each tag consists of a key and an optional value. You define both.

The following basic restrictions apply to tags:

  • Maximum number of tags per resource - 50

  • For each resource, each tag key must be unique, and each tag key can have only one value.

  • Maximum key length - 128 Unicode characters in UTF-8

  • Maximum value length - 256 Unicode characters in UTF-8

  • If your tagging schema is used across multiple services and resources, remember that other services may have restrictions on allowed characters. Generally allowed characters are: letters, numbers, and spaces representable in UTF-8, and the following characters: + - = . _ : / @.

  • Tag keys and values are case-sensitive.

  • Do not use aws: , AWS: , or any upper or lowercase combination of such as a prefix for either keys or values as it is reserved for Amazon Web Services use. You cannot edit or delete tag keys or values with this prefix. Tags with this prefix do not count against your tags per resource limit.

(structure)

The metadata that you apply to a resource to help you categorize and organize them. Each tag consists of a key and an optional value. You define them.

The following basic restrictions apply to tags:

  • Maximum number of tags per resource - 50

  • For each resource, each tag key must be unique, and each tag key can have only one value.

  • Maximum key length - 128 Unicode characters in UTF-8

  • Maximum value length - 256 Unicode characters in UTF-8

  • If your tagging schema is used across multiple services and resources, remember that other services may have restrictions on allowed characters. Generally allowed characters are: letters, numbers, and spaces representable in UTF-8, and the following characters: + - = . _ : / @.

  • Tag keys and values are case-sensitive.

  • Do not use aws: , AWS: , or any upper or lowercase combination of such as a prefix for either keys or values as it is reserved for Amazon Web Services use. You cannot edit or delete tag keys or values with this prefix. Tags with this prefix do not count against your tags per resource limit.

key -> (string)

One part of a key-value pair that make up a tag. A key is a general label that acts like a category for more specific tag values.

value -> (string)

The optional part of a key-value pair that make up a tag. A value acts as a descriptor within a tag category (key).

settings -> (list)

The settings for the cluster. This parameter indicates whether CloudWatch Container Insights is enabled or disabled for a cluster.

(structure)

The settings to use when creating a cluster. This parameter is used to turn on CloudWatch Container Insights for a cluster.

name -> (string)

The name of the cluster setting. The only supported value is containerInsights .

value -> (string)

The value to set for the cluster setting. The supported values are enabled and disabled . If enabled is specified, CloudWatch Container Insights will be enabled for the cluster, otherwise it will be disabled unless the containerInsights account setting is enabled. If a cluster value is specified, it will override the containerInsights value set with PutAccountSetting or PutAccountSettingDefault .

capacityProviders -> (list)

The capacity providers associated with the cluster.

(string)

defaultCapacityProviderStrategy -> (list)

The default capacity provider strategy for the cluster. When services or tasks are run in the cluster with no launch type or capacity provider strategy specified, the default capacity provider strategy is used.

(structure)

The details of a capacity provider strategy. A capacity provider strategy can be set when using the RunTask or CreateCluster APIs or as the default capacity provider strategy for a cluster with the CreateCluster API.

Only capacity providers that are already associated with a cluster and have an ACTIVE or UPDATING status can be used in a capacity provider strategy. The PutClusterCapacityProviders API is used to associate a capacity provider with a cluster.

If specifying a capacity provider that uses an Auto Scaling group, the capacity provider must already be created. New Auto Scaling group capacity providers can be created with the CreateCapacityProvider API operation.

To use a Fargate capacity provider, specify either the FARGATE or FARGATE_SPOT capacity providers. The Fargate capacity providers are available to all accounts and only need to be associated with a cluster to be used in a capacity provider strategy.

A capacity provider strategy may contain a maximum of 6 capacity providers.

capacityProvider -> (string)

The short name of the capacity provider.

weight -> (integer)

The weight value designates the relative percentage of the total number of tasks launched that should use the specified capacity provider. The weight value is taken into consideration after the base value, if defined, is satisfied.

If no weight value is specified, the default value of 0 is used. When multiple capacity providers are specified within a capacity provider strategy, at least one of the capacity providers must have a weight value greater than zero and any capacity providers with a weight of 0 can’t be used to place tasks. If you specify multiple capacity providers in a strategy that all have a weight of 0 , any RunTask or CreateService actions using the capacity provider strategy will fail.

An example scenario for using weights is defining a strategy that contains two capacity providers and both have a weight of 1 , then when the base is satisfied, the tasks will be split evenly across the two capacity providers. Using that same logic, if you specify a weight of 1 for capacityProviderA and a weight of 4 for capacityProviderB , then for every one task that’s run using capacityProviderA , four tasks would use capacityProviderB .

base -> (integer)

The base value designates how many tasks, at a minimum, to run on the specified capacity provider. Only one capacity provider in a capacity provider strategy can have a base defined. If no value is specified, the default value of 0 is used.

attachments -> (list)

The resources attached to a cluster. When using a capacity provider with a cluster, the capacity provider and associated resources are returned as cluster attachments.

(structure)

An object representing a container instance or task attachment.

id -> (string)

The unique identifier for the attachment.

type -> (string)

The type of the attachment, such as ElasticNetworkInterface .

status -> (string)

The status of the attachment. Valid values are PRECREATED , CREATED , ATTACHING , ATTACHED , DETACHING , DETACHED , DELETED , and FAILED .

details -> (list)

Details of the attachment. For elastic network interfaces, this includes the network interface ID, the MAC address, the subnet ID, and the private IPv4 address.

(structure)

A key-value pair object.

name -> (string)

The name of the key-value pair. For environment variables, this is the name of the environment variable.

value -> (string)

The value of the key-value pair. For environment variables, this is the value of the environment variable.

attachmentsStatus -> (string)

The status of the capacity providers associated with the cluster. The following are the states that are returned.

UPDATE_IN_PROGRESS

The available capacity providers for the cluster are updating.

UPDATE_COMPLETE

The capacity providers have successfully updated.

UPDATE_FAILED

The capacity provider updates failed.

failures -> (list)

Any failures associated with the call.

(structure)

A failed resource. For a list of common causes, see API failure reasons in the Amazon Elastic Container Service Developer Guide .

arn -> (string)

The Amazon Resource Name (ARN) of the failed resource.

reason -> (string)

The reason for the failure.

detail -> (string)

The details of the failure.

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