Auto Scaling:Use Auto Scaling SDKs to create multi-zone scaling groups

Usage notes

Before you use the VSwitchIds.N parameter, take note of the following usage notes:

• If you use the VSwitchIds.N parameter, Auto Scaling ignores the VSwitchId parameter.

• You can use the VSwitchIds.N parameter to specify up to five vSwitches for a scaling group. N in the VSwitchIds.N parameter specifies the vSwitch priority. A smaller value of N specifies a higher priority.

  If a scale-out event fails in the zone where the vSwitch that has the highest priority resides, Auto Scaling triggers a scale-out event in the zone where the vSwitch that has the next highest priority resides. We recommend that you use the VSwitchIds.N parameter to specify vSwitches of different zones. This helps prevent creation failures of ECS instances in a single zone due to insufficient resources.

• The vSwitches that are specified by the VSwitchIds.N parameter must belong to the same VPC.

Use Auto Scaling SDK for Java to create a multi-zone scaling group

1. Import Auto Scaling SDK for Java.

   Use Maven to manage the dependency libraries of your Java project and add the following dependencies to the pom.xml file of the project:

   <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>

2. Use Auto Scaling SDK for Java to create a multi-zone scaling group.

   After you import Auto Scaling SDK for Java into your Java project, you can use Auto Scaling SDK for Java to compile code to create a multi-zone scaling group. Sample code:

   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";
   
       // The list of vSwitches. The vSwitches are listed in descending order of 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 {
           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);
           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();
       }
   
   }       

   In the preceding code, the vSwitches are listed in descending order of priority. The first vSwitch has the highest priority.

Use Auto Scaling SDK for Python to create a multi-zone scaling group

1. Install Auto Scaling SDK for Python.

   Run the following command to install the dependencies:

   pip install alibabacloud_ess20220222==1.7.4

2. Use Auto Scaling SDK for Python to create a multi-zone scaling group.

   After you install the dependency libraries, you can use Auto Scaling SDK for Python to compile code to create a multi-zone scaling group. Sample code:

   # -*- 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:
           """
           Use your AccessKey ID and AccessKey secret to initialize the client.
           @return: Client
           @throws Exception
           """
           # 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(
               # Required. Make sure that the ALIBABA_CLOUD_ACCESS_KEY_ID environment variable is configured. ,
               access_key_id=os.environ['ALIBABA_CLOUD_ACCESS_KEY_ID'],
               # Required. Make sure that the ALIBABA_CLOUD_ACCESS_KEY_SECRET environment variable is configured. ,
               access_key_secret=os.environ['ALIBABA_CLOUD_ACCESS_KEY_SECRET']
           )
           config.endpoint = f'ess.aliyuncs.com'
           return Ess20220222Client(config)
   
       @staticmethod
       def main(
               args: List[str],
       ) -> None:
           client = Sample.create_client()
           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',
                   'vsw-bp******y'
               ]
           )
           runtime = util_models.RuntimeOptions()
           try:
               # Write your code to print the response of the API operation based on your business requirements.
               client.create_scaling_group_with_options(create_scaling_group_request, runtime)
           except Exception as error:
               # Exercise caution when you handle exceptions in actual business scenarios, and do not ignore exceptions in your project. In this example, error messages are printed only for reference. 
               # Print error messages.
               print(error.message)
               # Provide the URL for troubleshooting.
               print(error.data.get("Recommend"))
               UtilClient.assert_as_string(error.message)
   
   
   if __name__ == '__main__':
       Sample.main(sys.argv[1:])
   

   In the preceding code, Python 3.9 is used. The vSwitches are listed in descending order of priority.