Create an Auto Scaling configuration (ECI) - Auto Scaling

If your scaling group is of the ECI type, you can create a scaling configuration that serves as a template for the Elastic Container Instance (ECI) instances created during a scale-out. When a scale-out event is triggered, Auto Scaling automatically creates ECI instances based on this scaling configuration. You can create an ECI scaling configuration by using a form or a YAML file.

Prerequisites

An ECI scaling group is created. For more information, see Configure scaling groups.
A security group is created. If the scaling group uses a VPC, ensure the security group and the scaling group are in the same VPC. For more information, see Create a security group.

Procedure

You can create a scaling configuration for an ECI scaling group in several ways. Choose the method that best fits your requirements.

Using a form
You can directly create a scaling configuration in the Auto Scaling console using a form. For more information, see Method 1: Create a scaling configuration using a form.
Using a YAML file
You can also use a declarative Kubernetes YAML file to quickly create and manage a scaling configuration. You can write the YAML file in the console or apply it using the Alibaba Cloud CLI. For more information, see Method 2: Create a scaling configuration using a Kubernetes YAML file.

Method 1: By form

Go to the Create Scaling Configuration page.
1. Log on to the Auto Scaling console.
2. In the navigation pane on the left, click Scaling Groups.
3. In the top navigation bar, select a region.
4. On the Scaling Groups page, find the scaling group that you want to manage and click View Details in the Actions column.
5. Click the Instance Configuration Source tab, and on the Scaling Configurations tab, click Create Scaling Configuration to open the Create Scaling Configuration page.
On the Create Scaling Configuration page, click the Create by Form tab and fill in the basic settings. Then, click Next: Other Settings.
For information about the parameters, see Basic settings.
(Optional) Configure other settings.
For information about the parameters, see Other settings.
Click Confirm Configuration. Verify the settings and then click Create Order.
(Optional) Enable the scaling configuration.
After you click Create Order, the The scaling configuration is created. dialog box appears. You can click Enable to immediately enable the scaling configuration.
Note
If you do not want the configuration to take effect immediately, you can enable it later from the list of scaling configurations. For more information, see Select and enable a scaling configuration.

Method 2: By Kubernetes YAML file

Console

Go to the Create Scaling Configuration page.
1. Log on to the Auto Scaling console.
2. In the navigation pane on the left, click Scaling Groups.
3. In the top navigation bar, select a region.
4. On the Scaling Groups page, find the scaling group that you want to manage and click View Details in the Actions column.
5. Click the Instance Configuration Source tab, and on the Scaling Configurations tab, click Create Scaling Configuration to open the Create Scaling Configuration page.

On the Create Scaling Configuration page, click the Create by YAML File tab. Write the YAML file.

You can use the following example to help you write the YAML file.

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-demo
  annotations:
    # The name of the scaling configuration.
    k8s.aliyun.com/ess-eci-scaling-configuration-name: create-ess-config-by-yaml
spec:
  # This template defines the ECI instances to be created.
  template:
    metadata:
      labels:
          app: nginx-demo
      annotations:
        # The vSwitch ID. You can specify up to eight vSwitches in the same VPC. Separate multiple vSwitch IDs with commas (,).
        k8s.aliyun.com/eci-vswitch: vsw-bp******1,vsw-bp******2,vsw-bp******3,vsw-bp******4
        # The security group ID. You can specify up to five security groups in the same VPC. Separate multiple security group IDs with commas (,).
        k8s.aliyun.com/eci-security-group: sg-bp******1,sg-bp******2
        # Specifies whether to automatically create and associate an EIP.
        k8s.aliyun.com/eci-with-eip: 'true'
        # The ECI instance types.
        k8s.aliyun.com/eci-use-specs: 1.0-2.0Gi
        # The bandwidth of the EIP.
        k8s.aliyun.com/eip-bandwidth: '5'
    spec:
      containers:
        - name: nginx
          # The image.
          image: nginx:latest
          ports:
            - containerPort: 80
              name: http
            - containerPort: 443
              name: https
          resources:
            requests:
              memory: 0.05Gi
              cpu: 50m
            limits:
              memory: 2Gi
              cpu: '2'

The following table describes the parameters in this YAML file. For a description of all supported parameters, see YAML parameters.

YAML parameters for instances

Parameter	Description	Example
k8s.aliyun.com/ess-eci-scaling-configuration-name	The name of the scaling configuration.	create-ess-config-by-yaml
k8s.aliyun.com/eci-vswitch	The ID of the vSwitch. You can specify up to eight vSwitches in the same VPC. Separate multiple vSwitch IDs with commas (,). Important If you do not specify a VPC and a vSwitch, Auto Scaling uses or creates a default VPC and vSwitch. For more information, see Default VPCs and vSwitches.	vsw-bp****1,vsw-bp**2,vsw-bp****3
k8s.aliyun.com/eci-security-group: sg-bp******	The ID of the security group. You can specify up to five security groups in the same VPC. Separate multiple security group IDs with commas (,). Important The security group and the vSwitch must be in the same VPC.	sg-bp****1,sg-bp****2
k8s.aliyun.com/eci-with-eip	Specifies whether to automatically associate an EIP with the instance. Set the value to `true` to enable this feature.	true
k8s.aliyun.com/eci-use-specs	The ECI instance types. You can specify multiple types, including vCPU and memory specifications, or ECS instance types.	1.0-1.0Gi
k8s.aliyun.com/eip-bandwidth	The bandwidth of the EIP. Unit: Mbit/s. The default value is 5 Mbit/s.	5

Click Create. In the confirmation dialog box, click Create Order to create the scaling configuration.
(Optional) Enable the scaling configuration.
After you click Create Order, the Apply Scaling Configuration dialog box appears. You can click OK to immediately enable the scaling configuration.
Note
If you do not want the configuration to take effect immediately, you can enable it later from the list of scaling configurations. For more information, see Select and enable a scaling configuration.

Alibaba Cloud CLI

You can use Alibaba Cloud CLI to manage scaling configurations from the command line. The following steps describe how to use a YAML file to create a scaling configuration for ECI instances. This example uses the nginx:latest image.

Important

Before you begin, make sure that you have installed Alibaba Cloud CLI and configured your Alibaba Cloud CLI credentials and environment variables. For more information, see What is Alibaba Cloud CLI?.

Create a file named create-ess-config.yaml.