Auto Scaling:Use the Alibaba Cloud ESS SDK to quickly create a multi-zone scaling group

Step 1: Add dependencies

Use Maven to manage your Java project dependencies. Add the following to your pom.xml:

<dependency>
  <groupId>com.aliyun</groupId>
  <artifactId>tea-openapi</artifactId>
  <version>0.2.8</version>
</dependency>
<dependency>
  <groupId>com.aliyun</groupId>
  <artifactId>ess20220222</artifactId>
  <version>1.0.5</version>
</dependency>
<dependency>
  <groupId>com.aliyun</groupId>
  <artifactId>credentials-java</artifactId>
  <version>0.2.11</version>
</dependency>

Step 2: Create the scaling group

The following example creates a scaling group with two vSwitches. The first vSwitch (vsw-id1) has higher priority than the second (vsw-id2).

import com.aliyun.teaopenapi.models.Config;
import java.util.Arrays;
import java.util.List;

public class EssSdkDemo {
    public static final String       REGION_ID          = "cn-hangzhou";
    public static final Integer      MAX_SIZE           = 10;
    public static final Integer      MIN_SIZE           = 1;
    public static final String       SCALING_GROUP_NAME = "TestScalingGroup";

    // vSwitches listed in descending order of priority (first = highest priority)
    public static final String[]     vswitchIdArray     = { "vsw-id1", "vsw-id2" };
    public static final List<String> vswitchIds         = Arrays.asList(vswitchIdArray);

    public static void main(String[] args) throws Exception {
        // Initialize credentials from environment variables
        com.aliyun.credentials.Client credentialClient = new com.aliyun.credentials.Client();
        com.aliyun.teaopenapi.models.Config config = new Config();
        config.setCredential(credentialClient);
        config.setEndpoint("ess.aliyuncs.com");
        com.aliyun.ess20220222.Client client = new com.aliyun.ess20220222.Client(config);
        createScalingGroup(client);
    }

    public static String createScalingGroup(com.aliyun.ess20220222.Client client) throws Exception {
        com.aliyun.ess20220222.models.CreateScalingGroupRequest request =
            new com.aliyun.ess20220222.models.CreateScalingGroupRequest();
        request.setRegionId(REGION_ID);
        request.setMaxSize(MAX_SIZE);
        request.setMinSize(MIN_SIZE);
        request.setScalingGroupName(SCALING_GROUP_NAME);
        request.setVSwitchIds(vswitchIds);  // Sets the multi-zone vSwitches
        com.aliyun.teautil.models.RuntimeOptions runtime =
            new com.aliyun.teautil.models.RuntimeOptions();
        com.aliyun.ess20220222.models.CreateScalingGroupResponse scalingGroupWithOptions =
            client.createScalingGroupWithOptions(request, runtime);
        return scalingGroupWithOptions.getBody().toMap().toString();
    }
}

Replace vsw-id1 and vsw-id2 with your actual vSwitch IDs. The vSwitches are evaluated in list order, so put the preferred zone first.

Step 1: Install the SDK

pip install alibabacloud_ess20220222==1.7.4

Step 2: Create the scaling group

The following example uses Python 3.9 and creates a scaling group with two vSwitches listed in descending order of priority.

# -*- coding: utf-8 -*-
import os
import sys
from typing import List

from alibabacloud_ess20220222.client import Client as Ess20220222Client
from alibabacloud_tea_openapi import models as open_api_models
from alibabacloud_ess20220222 import models as ess_20220222_models
from alibabacloud_tea_util import models as util_models
from alibabacloud_tea_util.client import Client as UtilClient


class Sample:
    def __init__(self):
        pass

    @staticmethod
    def create_client() -> Ess20220222Client:
        """
        Initialize the Auto Scaling client using credentials from environment variables.

        :return: Ess20220222Client
        :raises Exception: If the environment variables are not set.
        """
        # If the project code is leaked, the AccessKey pair may be leaked and the security of
        # all resources in your Alibaba Cloud account may be compromised.
        # The following sample code is provided only for reference.
        config = open_api_models.Config(
            # Read credentials from environment variables to avoid hard-coding secrets
            access_key_id=os.environ['ALIBABA_CLOUD_ACCESS_KEY_ID'],
            access_key_secret=os.environ['ALIBABA_CLOUD_ACCESS_KEY_SECRET']
        )
        config.endpoint = 'ess.aliyuncs.com'
        return Ess20220222Client(config)

    @staticmethod
    def main(args: List[str]) -> None:
        client = Sample.create_client()

        # vSwitches listed in descending order of priority (first = highest priority)
        create_scaling_group_request = ess_20220222_models.CreateScalingGroupRequest(
            region_id='cn-hangzhou',
            scaling_group_name='py-sdk-create-scaling-group-sample',
            min_size=1,
            max_size=1,
            v_switch_ids=[
                'vsw-bp******g',  # Higher priority
                'vsw-bp******y'   # Lower priority (fallback zone)
            ]
        )
        runtime = util_models.RuntimeOptions()
        try:
            client.create_scaling_group_with_options(create_scaling_group_request, runtime)
        except Exception as error:
            # Exercise caution when handling exceptions in production scenarios.
            # Do not ignore exceptions in your project. The following prints are for reference only.
            # Print the error message and a link to the troubleshooting guide
            print(error.message)
            print(error.data.get("Recommend"))
            UtilClient.assert_as_string(error.message)


if __name__ == '__main__':
    Sample.main(sys.argv[1:])

Replace vsw-bp******g and vsw-bp******y with your actual vSwitch IDs.