This topic describes the release notes for Auto Scaling and provides links to the relevant references.
November 2021
| Feature | Description | Release date | Region | References |
|---|---|---|---|---|
| Support for asynchronous interaction | Auto Scaling allows you to manually moves an Elastic Compute Service (ECS) instance into or out of the Standby state in an asynchronous manner, which improves user experience. | 2021-11-29 | All | |
| Support for evaluation on ECS instance availability | Auto Scaling provides the scaling strength feature. You can use this feature to evaluate the availability of ECS instances, which helps improve the success rate of scale-out activities. | 2021-11-28 | All | Evaluate resource availability based on scalability |
| Support for automatic processing of abnormal scaling groups | If your scaling group is abnormal, the Auto Scaling console prompts you with an error message to help you identify and troubleshoot issues at the earliest opportunity. | 2021-11-16 | All | View scaling groups |
| Support for the configuration of capacity reservation | When you create or modify a scaling configuration, you can configure the Capacity Reservation parameter for ECS instances or elastic container instances. | 2021-11-02 | All |
October 2021
| Feature | Description | Release date | Region | References |
|---|---|---|---|---|
| Support for elastic container instances | Auto Scaling can scale elastic container instances in a scaling group. | 2021-10-20 | All |
September 2021
| Feature | Description | Release date | Region | References |
|---|---|---|---|---|
| Intelligent configuration | Intelligent configuration is supported in scaling configurations. In the Intelligent Configuration mode, Auto Scaling filters instance types that meet your configuration requirements for scale-out activities. | 2021-09-09 | All |
August 2021
| Feature | Description | Release date | Region | References |
|---|---|---|---|---|
| Economical mode | The feature name is changed from No Fees for Stopped Instances (VPC-Connected) to economical mode. | 2021-08-09 | All |
June 2021
| Feature | Description | Release date | Region | References |
|---|---|---|---|---|
| Association with ALB server groups | Application Load Balancer (ALB) server groups can be associated with scaling groups. After you associate an ALB server group with a scaling group, ECS instances that are added to the scaling group are automatically added to the ALB server group as backend servers. ALB instances distribute requests to the ALB server groups. | 2021-06-11 | All |
March 2021
| Feature | Description | Release date | Region | References |
|---|---|---|---|---|
| Vertical scaling | The specifications of pay-as-you-go instances can be changed. The specifications include vCPUs and memory size. | 2021-03-31 | All | Overview |
February 2021
| Feature | Description | Release date | Region | References |
|---|---|---|---|---|
| Scaling configuration | Weights can be specified for instance types. | 2021-02-12 | All |
January 2021
| Feature | Description | Release date | Region | References |
|---|---|---|---|---|
| Scaling configuration | Sequential and unique hostnames can be automatically generated. | 2021-01-15 | All |
November 2020
| Feature | Description | Release date | Region | References |
|---|---|---|---|---|
| Scaling configuration | The performance levels of system disks or data disks of the enhanced SSD (ESSD) category can be specified. | 2020-11-18 | All |
October 2020
| Feature | Description | Release date | Region | References |
|---|---|---|---|---|
| Event-triggered task | The statistical methods that are supported by custom monitoring event-triggered tasks are added. | 2020-10-25 | All |
September 2020
| Feature | Description | Release date | Region | References |
|---|---|---|---|---|
| Modification of scaling configurations | The images that are specified in scaling configurations can be modified. | 2020-09-24 | All | Replace the image in a single scaling configuration |
August 2020
| Feature | Description | Release date | Region | References |
|---|---|---|---|---|
| Rolling update | Operation Orchestration Service (OOS) packages can be used to install software. | 2020-08-20 | Some | Rolling update |
| Expected number of instances | The expected number of instances in a scaling group can be modified when you delete or remove instances from the scaling group. | 2020-08-12 | All | Expected number of instances |
| Scheduled task | The expiration time can be skipped. The maximum recurrence period can be up to one year. | 2020-08-07 | All | Create a scheduled task |
July 2020
| Feature | Description | Release date | Region | References |
|---|---|---|---|---|
| Modification of scaling groups | Health check can be enabled or disabled for instances in an existing scaling group. | 2020-07-30 | All | Modify a scaling group |
| Image update in scaling configurations | Update tasks can be created to update multiple images in scaling configurations at the same time. | 2020-07-02 | All | Replace images in multiple scaling configurations at a time |
May 2020
| Feature | Description | Release date | Region | References |
|---|---|---|---|---|
| Auto Scaling-linked role | The AliyunServiceRoleForAutoScaling role is automatically created when the Auto Scaling service is activated. | 2020-05-06 | All | Manage the service-linked role for Auto Scaling |
April 2020
| Feature | Description | Release date | Region | References |
|---|---|---|---|---|
| Rolling update | Rolling update tasks can be created to update the configurations of ECS instances in batches. | 2020-04-26 | Some | Rolling update |
March 2020
| Feature | Description | Release date | Region | References |
|---|---|---|---|---|
| Event-triggered task for system monitoring | More metrics are supported by system monitoring event-triggered tasks. | 2020-03-17 | All | Event-triggered task for system monitoring |
| Optimized configuration items for scaling groups | The classification of the configuration items that are used to create a scaling group is optimized. You can add tags to scaling groups and select existing instances as templates to create instances for the scaling groups. | 2020-03-11 | All | Create a scaling group |
December 2019
| Feature | Description | Release date | Region | References |
|---|---|---|---|---|
| Support for suspending and resuming processes in scaling groups | The processes for a scaling group can be suspended or resumed to control scaling operations in a fine-grained manner. | 2019-12-03 | All |
October 2019
| Feature | Description | Release date | Region | References |
|---|---|---|---|---|
| Configuration of the health status of ECS instances | An API operation can be called to configure the health status of an ECS instance. | 2019-10-25 | All | SetInstanceHealth |
| Expected number of instances | The expected number of ECS instances in a scaling group can be configured. This way, Auto Scaling can execute scaling activities in parallel. | 2019-10-22 | All | Expected number of instances |
September 2019
| Feature | Description | Release date | Region | References |
|---|---|---|---|---|
| Creation of a scaling configuration from an existing instance | API operations can be called to create a scaling group and instance IDs can be specified. Auto Scaling can obtain the configuration information of an instance and automatically create a scaling configuration. | 2019-09-24 | All | CreateScalingGroup |
August 2019
| Feature | Description | Release date | Region | References |
|---|---|---|---|---|
| Association of a lifecycle hook with an OOS template | A lifecycle hook can be associated with an OOS template. When the lifecycle hook is triggered, Auto Scaling automatically uses the associated OOS template. | 2019-08-14 | All | Create a lifecycle hook |
July 2019
| Feature | Description | Release date | Region | References |
|---|---|---|---|---|
| Support for mixed instance allocation in the cost optimization policy | If you set the multi-zone scaling policy to cost optimization, pay-as-you-go instances and preemptible instances can be created based on the capacity that you specify. | 2019-07-02 | All | Create a scaling group |
May 2019
| Feature | Description | Release date | Region | References |
|---|---|---|---|---|
| Step scaling rule | A step scaling rule can be created to control scaling activities based on the size of the alert breach. | 2019-05-20 | All | Create a scaling rule |
| Support for multiple security groups | An instance that is automatically created can be added to multiple security groups. | 2019-05-15 | All | Create a scaling configuration (ECS) |
| Query of the endpoint information | An API operation can be called to query the regions that support Auto Scaling. | 2019-05-05 | All | DescribeRegions |
April 2019
| Feature | Description | Release date | Region | References |
|---|---|---|---|---|
| Predictive scaling rule | Predictive scaling rules can be created. After you create a predictive scaling rule, Auto Scaling adjusts the minimum and maximum numbers of instances in a scaling group based on historical monitoring data. | 2019-04-18 | All | Overview |
| Support for the DiskName, DiskDescription, and Encrypted parameters in scaling configurations | The disk name, disk description, and encryption in scaling configurations can be configured. | 2019-04-04 | All | Create a scaling configuration (ECS) |
January 2019
| Feature | Description | Release date | Region | References |
|---|---|---|---|---|
| Target tracking scaling rule | Target tracking scaling rules can be created. After you create a target tracking scaling rule, Auto Scaling adjusts the number of instances based on the specified target values. | 2019-01-11 | All | Create a scaling rule |
December 2018
| Feature | Description | Release date | Region | References |
|---|---|---|---|---|
| Change of vSwitches | The vSwitches that are associated with a scaling group can be changed. | 2018-12-28 | All | Modify a scaling group |
| Cost optimization policy | The multi-zone scaling policy can be set to cost optimization. | 2018-12-16 | All | |
| vServer group | vServer groups can be specified for SLB instances that are associated with a scaling group. | 2018-12-07 | All | Use CLB in Auto Scaling |
November 2018
| Feature | Description | Release date | Region | References |
|---|---|---|---|---|
| Support for the No Fees for Stopped Instances (VPC-Connected) state | ECS instances that are removed from a scaling group can enter the No Fees for Stopped Instances (VPC-Connected) state. | 2018-11-28 | All |
October 2018
| Feature | Description | Release date | Region | References |
|---|---|---|---|---|
| Enhanced whitelist of ApsaraDB RDS instances | The private IP addresses of ECS instances in a scaling group can be added to the enhanced whitelist of the ApsaraDB RDS instances that are associated with the scaling group. | 2018-10-19 | All | Create a scaling group |
September 2018
| Feature | Description | Release date | Region | References |
|---|---|---|---|---|
| New region | Auto Scaling is available in the UK (London) region. | 2018-09-30 | All | What is Auto Scaling? |
| Shutdown and reclaim mode | The shutdown and reclaim mode can be specified for a scaling group. | 2018-09-13 | All | Create a scaling group |
| Launch template | A launch template can be specified as an instance configuration source for a scaling group. | 2018-09-01 | All | Create a scaling group |
August 2018
| Feature | Description | Release date | Region | References |
|---|---|---|---|---|
| Cron expression | Cron expressions can be used to specify the recurrence period of scheduled tasks. | 2018-08-20 | All | Create a scheduled task |
| Expiration notification for scheduled tasks | Expiration notifications for scheduled tasks can be configured. | 2018-08-20 | All | Create an event notification |
July 2018
| Feature | Description | Release date | Region | References |
|---|---|---|---|---|
| Modification of information about data disks and preemptible instances | Information about data disks and the price limits of preemptible instances in scaling configurations can be modified. | 2018-07-27 | All | Modify a scaling configuration |
| Association with ApsaraDB RDS instances | ApsaraDB RDS instances can be associated with or disassociated from scaling groups. | 2018-07-11 | All | Modify a scaling group |
| Association with SLB instances | SLB instances can be associated with or disassociated from scaling groups. | 2018-07-04 | All | Modify a scaling group |
June 2018
| Feature | Description | Release date | Region | References |
|---|---|---|---|---|
| Modification of scaling configurations | Existing scaling configurations can be modified. | 2018-06-27 | All | Modify a scaling configuration |
| Lifecycle hook | If an ECS instance is automatically created or removed from a scaling group, lifecycle hooks can be used to put the instance into the pending state. This way, you can perform custom operations on the instance. | 2018-06-01 | All | Create a lifecycle hook |
April 2018
| Feature | Description | Release date | Region | References |
|---|---|---|---|---|
| Scaling activity notifications | When a specific type of scaling activity occurs in a scaling group, notifications can be sent to CloudMonitor or Message Service. | 2018-04-20 | All | Event notification overview |
March 2018
| Feature | Description | Release date | Region | References |
|---|---|---|---|---|
| Protected state | ECS instances in a scaling group can be put into the Protected state. Instances in the Protected state are not released or removed from the scaling group during scale-in activities. | 2018-03-28 | All | Put an ECS instance into the Protected state |
| Standby state | ECS instances in a scaling group can be put into the Standby state. This way, you can manage the lifecycle of the ECS instances. | 2018-03-15 | All | Put an ECS instance into the Standby state |
2015
| Service | Description | Release date | Region | References |
|---|---|---|---|---|
| Auto Scaling | Auto Scaling is officially launched. | 2015-08-27 | Some | What is Auto Scaling? |
2014
| Service | Description | Release date | Region | References |
|---|---|---|---|---|
| Auto Scaling | Auto Scaling is in internal test. | 2014-10-15 | Some | What is Auto Scaling? |