**Example 1: To change the task definition used in a service** The following ``update-service`` example updates the ``my-http-service`` service to use the ``amazon-ecs-sample`` task definition. :: aws ecs update-service \ --cluster test \ --service my-http-service \ --task-definition amazon-ecs-sample Output:: { "service": { "serviceArn": "arn:aws:ecs:us-west-2:123456789012:service/test/my-http-service", "serviceName": "my-http-service", "clusterArn": "arn:aws:ecs:us-west-2:123456789012:cluster/test", "loadBalancers": [], "serviceRegistries": [], "status": "ACTIVE", "desiredCount": 2, "runningCount": 2, "pendingCount": 0, "launchType": "FARGATE", "platformVersion": "1.4.0", "platformFamily": "Linux", "taskDefinition": "arn:aws:ecs:us-west-2:123456789012:task-definition/amazon-ecs-sample:2", "deploymentConfiguration": { "deploymentCircuitBreaker": { "enable": true, "rollback": true }, "maximumPercent": 200, "minimumHealthyPercent": 100, "alarms": { "alarmNames": [], "rollback": false, "enable": false } }, "deployments": [ { "id": "ecs-svc/7419115625193919142", "status": "PRIMARY", "taskDefinition": "arn:aws:ecs:us-west-2:123456789012:task-definition/amazon-ecs-sample:2", "desiredCount": 0, "pendingCount": 0, "runningCount": 0, "failedTasks": 0, "createdAt": "2025-02-21T13:26:02.734000-06:00", "updatedAt": "2025-02-21T13:26:02.734000-06:00", "launchType": "FARGATE", "platformVersion": "1.4.0", "platformFamily": "Linux", "networkConfiguration": { "awsvpcConfiguration": { "subnets": [ "subnet-12344321" ], "securityGroups": [ "sg-12344321" ], "assignPublicIp": "ENABLED" } }, "rolloutState": "IN_PROGRESS", "rolloutStateReason": "ECS deployment ecs-svc/7419115625193919142 in progress." }, { "id": "ecs-svc/1709597507655421668", "status": "ACTIVE", "taskDefinition": "arn:aws:ecs:us-west-2:123456789012:task-definition/old-amazon-ecs-sample:4", "desiredCount": 2, "pendingCount": 0, "runningCount": 2, "failedTasks": 0, "createdAt": "2025-01-24T11:13:07.621000-06:00", "updatedAt": "2025-02-02T16:11:30.838000-06:00", "launchType": "FARGATE", "platformVersion": "1.4.0", "platformFamily": "Linux", "networkConfiguration": { "awsvpcConfiguration": { "subnets": [ "subnet-12344321" ], "securityGroups": [ "sg-12344321" ], "assignPublicIp": "ENABLED" } }, "rolloutState": "COMPLETED", "rolloutStateReason": "ECS deployment ecs-svc/1709597507655421668 completed." } ], "roleArn": "arn:aws:iam::123456789012:role/aws-service-role/ecs.amazonaws.com/AWSServiceRoleForECS", "events": [ { "id": "e40b4d1c-80d9-4834-aaf3-6a268e530e17", "createdAt": "2025-02-21T10:31:26.037000-06:00", "message": "(my-http-service) has reached a steady state." }, { "id": "6ac069ad-fc8b-4e49-a35d-b5574a964c8e", "createdAt": "2025-02-21T04:31:22.703000-06:00", "message": "(my-http-service) has reached a steady state." }, { "id": "265f7d37-dfd1-4880-a846-ec486f341919", "createdAt": "2025-02-20T22:31:22.514000-06:00", "message": "(my-http-service) has reached a steady state." } ], "createdAt": "2024-10-30T17:12:43.218000-05:00", "placementConstraints": [], "placementStrategy": [], "networkConfiguration": { "awsvpcConfiguration": { "subnets": [ "subnet-12344321", ], "securityGroups": [ "sg-12344321" ], "assignPublicIp": "ENABLED" } }, "healthCheckGracePeriodSeconds": 0, "schedulingStrategy": "REPLICA", "deploymentController": { "type": "ECS" }, "createdBy": "arn:aws:iam::123456789012:role/AIDACKCEVSQ6C2EXAMPLE", "enableECSManagedTags": true, "propagateTags": "NONE", "enableExecuteCommand": false, "availabilityZoneRebalancing": "DISABLED" } } For more information, see `Update an Amazon ECS service using the console `__ in the *Amazon ECS Developer Guide*. **Example 2: To change the number of tasks in a service** The following ``update-service`` example updates the desired task count of the service ``my-http-service`` from to 2. :: aws ecs update-service \ --cluster MyCluster \ --service my-http-service \ --desired-count 2 Output:: { "service": { "serviceArn": "arn:aws:ecs:us-east-1:123456789012:service/MyCluster/my-http-service", "serviceName": "my-http-service", "clusterArn": "arn:aws:ecs:us-east-1:123456789012:cluster/MyCluster", "loadBalancers": [], "serviceRegistries": [], "status": "ACTIVE", "desiredCount": 2, "runningCount": 1, "pendingCount": 0, "capacityProviderStrategy": [ { "capacityProvider": "FARGATE", "weight": 1, "base": 0 } ], "platformVersion": "LATEST", "platformFamily": "Linux", "taskDefinition": "arn:aws:ecs:us-east-1:123456789012:task-definition/MyTaskDefinition", "deploymentConfiguration": { "deploymentCircuitBreaker": { "enable": true, "rollback": true }, "maximumPercent": 200, "minimumHealthyPercent": 100, "alarms": { "alarmNames": [], "rollback": false, "enable": false } }, "deployments": [ { "id": "ecs-svc/1976744184940610707", "status": "PRIMARY", "taskkDefinition": "arn:aws:ecs:us-east-1:123456789012:task-definition/MyTaskDefinition", "desiredCount": 1, "pendingCount": 0, "runningCount": 1, "failedTasks": 0, "createdAt": "2024-12-03T16:24:25.225000-05:00", "updatedAt": "2024-12-03T16:25:15.837000-05:00", "capacityProviderStrategy": [ { "capacityProvider": "FARGATE", "weight": 1, "base": 0 } ], "platformVersion": "1.4.0", "platformFamily": "Linux", "networkConfiguration": { "awsvpcConfiguration": { "subnets": [ "subnet-0d0eab1bb38d5ca64", "subnet-0db5010045995c2d5" ], "securityGroups": [ "sg-02556bf85a191f59a" ], "assignPublicIp": "ENABLED" } }, "rolloutState": "COMPLETED", "rolloutStateReason": "ECS deployment ecs-svc/1976744184940610707 completed." } ], "roleArn": "arn:aws:iam::123456789012:role/aws-service-role/ecs.amazonaws.com/AWSServiceRoleForECS", "events": [ { "id": "f27350b9-4b2a-4e2e-b72e-a4b68380de45", "createdAt": "2024-12-30T13:24:07.345000-05:00", "message": "(service my-http-service) has reached a steady state." }, { "id": "e764ec63-f53f-45e3-9af2-d99f922d2957", "createdAt": "2024-12-30T12:32:21.600000-05:00", "message": "(service my-http-service) has reached a steady state." }, { "id": "28444756-c2fa-47f8-bd60-93a8e05f3991", "createdAt": "2024-12-08T19:26:10.367000-05:00", "message": "(service my-http-service) has reached a steady state." } ], "createdAt": "2024-12-03T16:24:25.225000-05:00", "placementConstraints": [], "placementStrategy": [], "networkConfiguration": { "awsvpcConfiguration": { "subnets": [ "subnet-0d0eab1bb38d5ca64", "subnet-0db5010045995c2d5" ], "securityGroups": [ "sg-02556bf85a191f59a" ], "assignPublicIp": "ENABLED" } }, "healthCheckGracePeriodSeconds": 0, "schedulingStrategy": "REPLICA", "deploymentController": { "type": "ECS" }, "createdBy": "arn:aws:iam::123456789012:role/Admin", "enableECSManagedTags": true, "propagateTags": "NONE", "enableExecuteCommand": false, "availabilityZoneRebalancing": "ENABLED" } } For more information, see `Updating an Amazon ECS service using the console `__ in the *Amazon ECS Developer Guide*. **Example 3: To configure Amazon EBS volumes for attachment at service update** The following ``update-service`` example updates the service ``my-http-service`` to use Amazon EBS volumes. You must have an Amazon ECS infrastructure role configured with the ``AmazonECSInfrastructureRolePolicyForVolumes`` managed policy attached. You must also specify a task definition with the same volume name as in the ``update-service`` request and with ``configuredAtLaunch`` set to ``true``. This example uses the ``--cli-input-json`` option and a JSON input file called ``ebs.json``. :: aws ecs update-service \ --cli-input-json file://ebs.json Contents of ``ebs.json``:: { "cluster": "mycluster", "taskDefinition": "mytaskdef", "service": "my-http-service", "desiredCount": 2, "volumeConfigurations": [ { "name": "myEbsVolume", "managedEBSVolume": { "roleArn":"arn:aws:iam::123456789012:role/ecsInfrastructureRole", "volumeType": "gp3", "sizeInGiB": 100, "iops": 3000, "throughput": 125, "filesystemType": "ext4" } } ] } Output:: { "service": { "serviceArn": "arn:aws:ecs:us-west-2:123456789012:service/mycluster/my-http-service", "serviceName": "my-http-service", "clusterArn": "arn:aws:ecs:us-west-2:123456789012:cluster/mycluster", "loadBalancers": [], "serviceRegistries": [], "status": "ACTIVE", "desiredCount": 2, "runningCount": 2, "pendingCount": 0, "launchType": "FARGATE", "platformVersion": "LATEST", "platformFamily": "Linux", "taskDefinition": "arn:aws:ecs:us-west-2:123456789012:task-definition/mytaskdef:1", "deploymentConfiguration": { "deploymentCircuitBreaker": { "enable": true, "rollback": true }, "maximumPercent": 200, "minimumHealthyPercent": 100, "alarms": { "alarmNames": [], "rollback": false, "enable": false } }, "deployments": [ { "id": "ecs-svc/2420458347226626275", "status": "PRIMARY", "taskDefinition": "arn:aws:ecs:us-west-2:123456789012:task-definition/mytaskdef:1", "desiredCount": 0, "pendingCount": 0, "runningCount": 0, "failedTasks": 0, "createdAt": "2025-02-21T15:07:20.519000-06:00", "updatedAt": "2025-02-21T15:07:20.519000-06:00", "launchType": "FARGATE", "platformVersion": "1.4.0", "platformFamily": "Linux", "networkConfiguration": { "awsvpcConfiguration": { "subnets": [ "subnet-12344321", ], "securityGroups": [ "sg-12344321" ], "assignPublicIp": "ENABLED" } }, "rolloutState": "IN_PROGRESS", "rolloutStateReason": "ECS deployment ecs-svc/2420458347226626275 in progress.", "volumeConfigurations": [ { "name": "ebs-volume", "managedEBSVolume": { "volumeType": "gp3", "sizeInGiB": 100, "iops": 3000, "throughput": 125, "roleArn": "arn:aws:iam::123456789012:role/ecsInfrastructureRole", "filesystemType": "ext4" } } ] }, { "id": "ecs-svc/5191625155316533644", "status": "ACTIVE", "taskDefinition": "arn:aws:ecs:us-west-2:123456789012:task-definition/mytaskdef:2", "desiredCount": 2, "pendingCount": 0, "runningCount": 2, "failedTasks": 0, "createdAt": "2025-02-21T14:54:48.862000-06:00", "updatedAt": "2025-02-21T14:57:22.502000-06:00", "launchType": "FARGATE", "platformVersion": "1.4.0", "platformFamily": "Linux", "networkConfiguration": { "awsvpcConfiguration": { "subnets": [ "subnet-12344321" ], "securityGroups": [ "sg-12344321" ], "assignPublicIp": "ENABLED" } }, "rolloutState": "COMPLETED", "rolloutStateReason": "ECS deployment ecs-svc/5191625155316533644 completed." } ], "roleArn": "arn:aws:iam::123456789012:role/aws-service-role/ecs.amazonaws.com/AWSServiceRoleForECS", "events": [ { "id": "b5823113-c2c5-458e-9649-8c2ed38f23a5", "createdAt": "2025-02-21T14:57:22.508000-06:00", "message": "(service my-http-service) has reached a steady state." }, { "id": "b05a48e8-da35-4074-80aa-37ceb3167357", "createdAt": "2025-02-21T14:57:22.507000-06:00", "message": "(service my-http-service) (deployment ecs-svc/5191625155316533644) deployment completed." }, { "id": "a10cd55d-4ba6-4cea-a655-5a5d32ada8a0", "createdAt": "2025-02-21T14:55:32.833000-06:00", "message": "(service my-http-service) has started 1 tasks: (task fb9c8df512684aec92f3c57dc3f22361)." }, ], "createdAt": "2025-02-21T14:54:48.862000-06:00", "placementConstraints": [], "placementStrategy": [], "networkConfiguration": { "awsvpcConfiguration": { "subnets": [ "subnet-12344321" ], "securityGroups": [ "sg-12344321" ], "assignPublicIp": "ENABLED" } }, "healthCheckGracePeriodSeconds": 0, "schedulingStrategy": "REPLICA", "deploymentController": { "type": "ECS" }, "createdBy": "arn:aws:iam::123456789012:role/AIDACKCEVSQ6C2EXAMPLE", "enableECSManagedTags": true, "propagateTags": "NONE", "enableExecuteCommand": false, "availabilityZoneRebalancing": "ENABLED" } } For more information, see `Use Amazon EBS volumes with Amazon ECS `__ in the *Amazon ECS Developer Guide*. **Example 4: To update a service to no longer use Amazon EBS volumes** The following ``update-service`` example updates the service ``my-http-service`` to no longer use Amazon EBS volumes. You must specify a task definition revision with ``configuredAtLaunch`` set to ``false``. :: aws ecs update-service \ --cluster mycluster \ --task-definition mytaskdef \ --service my-http-service \ --desired-count 2 \ --volume-configurations "[]" Output:: { "service": { "serviceArn": "arn:aws:ecs:us-west-2:123456789012:service/mycluster/my-http-service", "serviceName": "my-http-service", "clusterArn": "arn:aws:ecs:us-west-2:123456789012:cluster/mycluster", "loadBalancers": [], "serviceRegistries": [], "status": "ACTIVE", "desiredCount": 2, "runningCount": 2, "pendingCount": 0, "launchType": "FARGATE", "platformVersion": "LATEST", "platformFamily": "Linux", "taskDefinition": "arn:aws:ecs:us-west-2:123456789012:task-definition/mytaskdef:3", "deploymentConfiguration": { "deploymentCircuitBreaker": { "enable": true, "rollback": true }, "maximumPercent": 200, "minimumHealthyPercent": 100, "alarms": { "alarmNames": [], "rollback": false, "enable": false } }, "deployments": [ { "id": "ecs-svc/7522791612543716777", "status": "PRIMARY", "taskDefinition": "arn:aws:ecs:us-west-2:123456789012:task-definition/mytaskdef:3", "desiredCount": 0, "pendingCount": 0, "runningCount": 0, "failedTasks": 0, "createdAt": "2025-02-21T15:25:38.598000-06:00", "updatedAt": "2025-02-21T15:25:38.598000-06:00", "launchType": "FARGATE", "platformVersion": "1.4.0", "platformFamily": "Linux", "networkConfiguration": { "awsvpcConfiguration": { "subnets": [ "subnet-12344321" ], "securityGroups": [ "sg-12344321" ], "assignPublicIp": "ENABLED" } }, "rolloutState": "IN_PROGRESS", "rolloutStateReason": "ECS deployment ecs-svc/7522791612543716777 in progress." }, { "id": "ecs-svc/2420458347226626275", "status": "ACTIVE", "taskDefinition": "arn:aws:ecs:us-west-2:123456789012:task-definition/myoldtaskdef:1", "desiredCount": 2, "pendingCount": 0, "runningCount": 2, "failedTasks": 0, "createdAt": "2025-02-21T15:07:20.519000-06:00", "updatedAt": "2025-02-21T15:10:59.955000-06:00", "launchType": "FARGATE", "platformVersion": "1.4.0", "platformFamily": "Linux", "networkConfiguration": { "awsvpcConfiguration": { "subnets": [ "subnet-12344321" ], "securityGroups": [ "sg-12344321" ], "assignPublicIp": "ENABLED" } }, "rolloutState": "COMPLETED", "rolloutStateReason": "ECS deployment ecs-svc/2420458347226626275 completed.", "volumeConfigurations": [ { "name": "ebs-volume", "managedEBSVolume": { "volumeType": "gp3", "sizeInGiB": 100, "iops": 3000, "throughput": 125, "roleArn": "arn:aws:iam::123456789012:role/ecsInfrastructureRole", "filesystemType": "ext4" } } ] } ], "roleArn": "arn:aws:iam::123456789012:role/aws-service-role/ecs.amazonaws.com/AWSServiceRoleForECS", "events": [ { "id": "4f2c3ca1-7800-4048-ba57-bba210ada2ad", "createdAt": "2025-02-21T15:10:59.959000-06:00", "message": "(service my-http-service) has reached a steady state." }, { "id": "4b36a593-2d40-4ed6-8be8-b9b699eb6198", "createdAt": "2025-02-21T15:10:59.958000-06:00", "message": "(service my-http-service) (deployment ecs-svc/2420458347226626275) deployment completed." }, { "id": "88380089-14e2-4ef0-8dbb-a33991683371", "createdAt": "2025-02-21T15:09:39.055000-06:00", "message": "(service my-http-service) has stopped 1 running tasks: (task fb9c8df512684aec92f3c57dc3f22361)." }, { "id": "97d84243-d52f-4255-89bb-9311391c61f6", "createdAt": "2025-02-21T15:08:57.653000-06:00", "message": "(service my-http-service) has stopped 1 running tasks: (task 33eff090ad2c40539daa837e6503a9bc)." }, { "id": "672ece6c-e2d0-4021-b5da-eefb14001687", "createdAt": "2025-02-21T15:08:15.631000-06:00", "message": "(service my-http-service) has started 1 tasks: (task 996c02a66ff24f3190a4a8e0c841740f)." }, { "id": "a3cf9bea-9be6-4175-ac28-4c68360986eb", "createdAt": "2025-02-21T15:07:36.931000-06:00", "message": "(service my-http-service) has started 1 tasks: (task d5d23c39f89e46cf9a647b9cc6572feb)." }, { "id": "b5823113-c2c5-458e-9649-8c2ed38f23a5", "createdAt": "2025-02-21T14:57:22.508000-06:00", "message": "(service my-http-service) has reached a steady state." }, { "id": "b05a48e8-da35-4074-80aa-37ceb3167357", "createdAt": "2025-02-21T14:57:22.507000-06:00", "message": "(service my-http-service) (deployment ecs-svc/5191625155316533644) deployment completed." }, { "id": "a10cd55d-4ba6-4cea-a655-5a5d32ada8a0", "createdAt": "2025-02-21T14:55:32.833000-06:00", "message": "(service my-http-service) has started 1 tasks: (task fb9c8df512684aec92f3c57dc3f22361)." }, { "id": "42da91fa-e26d-42ef-88c3-bb5965c56b2f", "createdAt": "2025-02-21T14:55:02.703000-06:00", "message": "(service my-http-service) has started 1 tasks: (task 33eff090ad2c40539daa837e6503a9bc)." } ], "createdAt": "2025-02-21T14:54:48.862000-06:00", "placementConstraints": [], "placementStrategy": [], "networkConfiguration": { "awsvpcConfiguration": { "subnets": [ "subnet-12344321" ], "securityGroups": [ "sg-12344321" ], "assignPublicIp": "ENABLED" } }, "healthCheckGracePeriodSeconds": 0, "schedulingStrategy": "REPLICA", "deploymentController": { "type": "ECS" }, "createdBy": "arn:aws:iam::123456789012:role/AIDACKCEVSQ6C2EXAMPLE", "enableECSManagedTags": true, "propagateTags": "NONE", "enableExecuteCommand": false, "availabilityZoneRebalancing": "ENABLED" } } For more information, see `Use Amazon EBS volumes with Amazon ECS `__ in the *Amazon ECS Developer Guide*. **Example 5: To turn on Availability Zone rebalancing for a service** The following ``update-service`` example turns on Availability Zone rebalancing for the service ``my-http-service``. :: aws ecs update-service \ --cluster MyCluster \ --service my-http-service \ --availability-zone-rebalancing ENABLED Output:: { "service": { "serviceArn": "arn:aws:ecs:us-east-1:123456789012:service/MyCluster/my-http-service", "serviceName": "my-http-service", "clusterArn": "arn:aws:ecs:us-east-1:123456789012:cluster/MyCluster", "loadBalancers": [], "serviceRegistries": [], "status": "ACTIVE", "desiredCount": 2, "runningCount": 1, "pendingCount": 0, "capacityProviderStrategy": [ { "capacityProvider": "FARGATE", "weight": 1, "base": 0 } ], "platformVersion": "LATEST", "platformFamily": "Linux", "taskDefinition": "arn:aws:ecs:us-east-1:123456789012:task-definition/MyTaskDefinition", "deploymentConfiguration": { "deploymentCircuitBreaker": { "enable": true, "rollback": true }, "maximumPercent": 200, "minimumHealthyPercent": 100, "alarms": { "alarmNames": [], "rollback": false, "enable": false } }, "deployments": [ { "id": "ecs-svc/1976744184940610707", "status": "PRIMARY", "taskkDefinition": "arn:aws:ecs:us-east-1:123456789012:task-definition/MyTaskDefinition", "desiredCount": 1, "pendingCount": 0, "runningCount": 1, "failedTasks": 0, "createdAt": "2024-12-03T16:24:25.225000-05:00", "updatedAt": "2024-12-03T16:25:15.837000-05:00", "capacityProviderStrategy": [ { "capacityProvider": "FARGATE", "weight": 1, "base": 0 } ], "platformVersion": "1.4.0", "platformFamily": "Linux", "networkConfiguration": { "awsvpcConfiguration": { "subnets": [ "subnet-0d0eab1bb38d5ca64", "subnet-0db5010045995c2d5" ], "securityGroups": [ "sg-02556bf85a191f59a" ], "assignPublicIp": "ENABLED" } }, "rolloutState": "COMPLETED", "rolloutStateReason": "ECS deployment ecs-svc/1976744184940610707 completed." } ], "roleArn": "arn:aws:iam::123456789012:role/aws-service-role/ecs.amazonaws.com/AWSServiceRoleForECS", "events": [], "createdAt": "2024-12-03T16:24:25.225000-05:00", "placementConstraints": [], "placementStrategy": [], "networkConfiguration": { "awsvpcConfiguration": { "subnets": [ "subnet-0d0eab1bb38d5ca64", "subnet-0db5010045995c2d5" ], "securityGroups": [ "sg-02556bf85a191f59a" ], "assignPublicIp": "ENABLED" } }, "healthCheckGracePeriodSeconds": 0, "schedulingStrategy": "REPLICA", "deploymentController": { "type": "ECS" }, "createdBy": "arn:aws:iam::123456789012:role/Admin", "enableECSManagedTags": true, "propagateTags": "NONE", "enableExecuteCommand": false, "availabilityZoneRebalancing": "ENABLED" } } For more information, see `Updating an Amazon ECS service using the console `__ in the *Amazon ECS Developer Guide*.