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 fails in the zone where the vSwitch with the highest priority resides, Auto Scaling triggers a scale-out in the zone where the vSwitch with 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 instance types.

• 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.
   If you use Maven to manage Java dependencies, you can add the following dependencies to the pom.xml file of your 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. The first vSwitch has the 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 {
           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 commands to install the dependencies:

   pip install alibabacloud_credentials
   pip install alibabacloud_ess20220222==1.0.6

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:

   #!/usr/bin/env python
   #coding=utf-8
   
   from aliyunsdkcore.client import AcsClient
   from aliyunsdkcore.request import CommonRequest
   from aliyunsdkcore.auth.credentials import AccessKeyCredential
   from alibabacloud_credentials.client import Client as CredClient
   cred=CredClient()
   accesskeyid = cred.get_access_key_id()
   accesskeysecret = cred.get_access_key_secret()
   credentials = AccessKeyCredential(accesskeyid, accesskeysecret)
   client = AcsClient(region_id='cn-hangzhou', credential=credentials)
   request = CommonRequest()
   request.set_accept_format('json')
   request.set_domain('ess.aliyuncs.com')
   request.set_method('POST')
   request.set_protocol_type('https') # https | http
   request.set_version('2022-02-22')
   request.set_action_name('CreateScalingGroup')
   request.add_query_param('ScalingGroupName', "testname")
   request.add_query_param('MinSize', "1")
   request.add_query_param('MaxSize', "1")
   request.add_query_param('VSwitchIds.1', "vsw-1")
   request.add_query_param('VSwitchIds.2', "vsw-2")
   request.add_query_param('RegionId', "cn-hangzhou")
   
   response = client.do_action(request)
   # python2:  print(response)
   print(str(response, encoding = 'utf-8'))

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