When you use an Elastic Container Instance (ECI) to provide long-term services, you can use reserved instances to deduct the costs of the ECI. This topic describes how to use reserved instances.


  1. Purchase reserved instances based on your needs. For more information, see Purchase reserved instances.
  2. View and manage your reserved instances. For more information, see Split a reserved instance.
Note Reserved instances are automatically applied to pay-as-you-go ECIs based on matching rules. For more information about matching rules, see Match between reserved instances and pay-as-you-go instances.


A reserved instance is only applicable when you create an ECI based on a specified ECS instance type. For more information, see Create an ECI from a specified ECS instance type.

Add the following annotations to the templte field of a pod. In this example, the reserved instance is used to purchase an ecs.c5.large instance.

    k8s.aliyun.com/eci-instance-type : "ecs.c5.large"  #Replace the value with the ECS instance type in the following format: ecs. instance family. instance specification. For example, ecs.c6.3xlarge.
Note annotations must be added to the spec field of the pod. Enter the ECS instance type as needed. For more information about supported ECS instance types, see Instance families.

Deployment example

annotations must be added to the metadata field of the pod.

Note The zone of the reserved instance must be the same as that of your cluster. Otherwise, the reserved instance cannot match the ECI created in your serverless Kubernetes (ASK) cluster.
apiVersion: apps/v1beta2
kind: Deployment
  name: nginx
    app: nginx
  replicas: 2
      app: nginx
        app: nginx
        k8s.aliyun.com/eci-instance-type : "ecs.c5.large"  #Replace the value with the ECS instance type as needed.
      - name: nginx
        image: nginx:1.7.9
        - containerPort: 80

View billing and deduction details about a reserved instance

View the bill of a reserved instance

  1. Log on to the ECS console.
  2. In the left-side navigation pane, choose Instances & Images > Reserved Instances.
  3. In the top navigation bar, select a region.
  4. Find the reserved instance that you want to view and click View Bill in the Actions column.
  5. On the Manage Reserved Instances page, click the Details tab.
    You can view the usage details of the reserved instance. These details show the ECS instance or ECI whose fees are deducted by the reserved instance during every billing hour.
    Note One computing unit equals one vCPU. The deductible duration (hours) equals the number of computing units multiplied by the number of hours.