Creating an AS Group Quickly

Scenarios

Auto Scaling (AS) automatically adjusts resources based on your service requirements and preset AS policies, helping you save resources and labor costs.

AS is available for free, but you pay for the instances (cloud servers) automatically added to the AS group and the resources used by the instances, such as EIPs, disks, and images.

This section walks you through the process of creating an AS configuration and an AS group, which are two critical steps for using AS.

Procedure

Step 1: Create an AS Configuration

In this step, you create an AS configuration using the example settings. For details about how to create an AS configuration, see Creating an AS Configuration.

1. Log in to the console and go to the Create AS Configuration page.
2. Configure the AS configuration settings.
   Figure 1 Page for creating an AS configuration
   
   
   

   Table 1 Parameters for creating an AS configuration

   Parameter	Example	Description
   Billing Mode	Pay-per-use	Resources will be billed based on the usage duration. You can provision or delete resources at any time. For details, see ECS Billing Overview.
   Region	CN-Hong Kong	For low network latency and quick resource access, select the region nearest to your target users. For details, see Region and AZ.
   Name	as-config-3817	Enter a name for the AS configuration.
   Configuration Template	Create new template	Specify the specifications, image, and disk settings for the instances AS creates.
   CPU Architecture	x86	x86 uses Complex Instruction Set Computing (CISC).
   Specifications	s7n.xlarge.2	Select a flavor one based on service requirements. For more information, see A Summary List of x86 ECS Specifications.
   Image	CentOS 8.2 64bit (40 GiB)	The example is a free public Linux image provided by Huawei Cloud.
   Disk	General Purpose SSD, 100 GiB	Specify the specifications of the system disk for instances AS creates.
   Security Group	default	Use the default security group.
   EIP	Do not use	If the instances in the AS group need to access the Internet, you can configure EIPs for the instances.
   Login Mode	Key pair	A key pair for logging in to instances.
   Key Pair	KeyPair-2325	Use an existing or create a new key pair. Ensure that you have obtained the private key.
   Advanced Settings	Do not configure	-

3. Click Create Now.
4. Click Back to AS Configuration List to view the created AS configuration.
   Figure 2 Viewing the AS configuration
   

Step 2: Create an AS Group

In this step, you create an AS group using the example settings. For details about how to create an AS group, see AS Groups.

1. Log in to the console and go to the Create AS Group page.
2. Configure the AS group settings.
   Figure 3 Page for creating an AS group
   
   
   

   Table 2 Parameters for creating an AS group

   Parameter	Example	Description
   Region	CN-Hong Kong	For low network latency and quick resource access, select the region nearest to your target users. For details, see Region and AZ.
   AZ	AZ1, AZ2, AZ3, AZ7	AZs are physically isolated but interconnected over a high-speed intranet.
   Multi-AZ Scaling Policy	Balanced	This policy ensures that the number of instances in each of the selected AZs is balanced.
   Name	as-group-test1	Enter a name for the AS group.
   Max. Instances	1	Specify the maximum group size.
   Expected Instances	0	Specify the desired initial group size.
   Min. Instances	0	Specify the minimum group size.
   AS Configuration	as-config-3817	Select the AS configuration created in step 1.
   VPC	vpc-default-smb	Use the default VPC and subnet. For details, see VPC and Subnet Planning.
   Subnet	subnet-default-smb
   Load Balancing	Do not use	This parameter is optional. For details, see Adding a Load Balancer to an AS Group.
   Instance Removal Policy	Oldest instance created from oldest AS configuration	With this policy, instances that use the oldest AS configuration are removed from the AS group first.
   EIP	Release	With this option, when an instance is removed from an AS group, its EIP will be released.
   Data Disk	Delete	With this option, when the instance is removed from the AS group, all data disks attached to the instance will be deleted
   Health Check Method	ECS health check	With this method, AS checks whether instances are running. If an instance fails the health check, AS removes it from the AS group.
   Health Check Interval	5 minutes	Specify the interval between health checks.
   Health Check Grace Period (s)	600	Specify how long AS must wait before checking the health status of an instance.
   Enterprise Project	default	Specify the enterprise project where the AS group is managed. Instances in this AS group are also managed under the same project.

3. Click Create Now.
4. Click Back to AS Group List to view the created AS group.
   Figure 4 Viewing the AS group
   

Step 3: Create an AS Policy

In this step, you create AS scaling policies to adjust service resources.