This topic describes the release notes of Auto Scaling.

July 2020

Feature Description Released on Released in Reference
Support for updating images in scaling configurations You can create an update image task to replace images in scaling configurations in batches. 2020-07-02 All regions Update images in scaling configurations

May 2020

Feature Description Released on Released in Reference
Auto Scaling service linked role When the Auto Scaling service is activated, a service linked role named AliyunServiceRoleForAutoScaling is automatically created for Auto Scaling. 2020-05-06 All regions Activate and grant permissions to Auto Scaling

April 2020

Feature Description Released on Released in Reference
Rolling update Rolling update tasks can be used to update the configurations of ECS instances in batches. 2020-04-26 Some regions Rolling update

March 2020

Feature Description Released on Released in Reference
System monitoring event-triggered tasks System monitoring event-triggered tasks support more monitoring metrics. 2020-03-17 All regions Event-triggered tasks for system monitoring
Optimization for creating scaling groups Configuration items for creating a scaling group are optimized. You can select an existing instance as the template source and add tags for a scaling group. 2020-03-11 All regions Create a scaling group

December 2019

Feature Description Released on Released in Reference
Suspension and resumption of processes for a scaling group You can suspend or resume processes for a scaling group to implement fine-grained control of scaling operations. 2019-12-03 All regions

October 2019

Feature Description Released on Released in Reference
Support for ECS instance health status You can call an API operation to set the health status of an ECS instance. 2019-10-25 All regions SetInstanceHealth
Expected number of ECS instances You can set an expected number of ECS instances for a scaling group. This allows Auto Scaling to flexibly execute parallel scaling activities. 2019-10-22 All regions Expected Instances

September 2019

Feature Description Released on Released in Reference
Support for creating a scaling configuration from an existing instance You can call an API operation to specify an instance as the template source when you create a scaling group. Auto Scaling obtains the configuration information of the instance and automatically creates a scaling configuration. 2019-09-24 All regions CreateScalingGroup

August 2019

Feature Description Released on Released in Reference
Support for associating a lifecycle hook with an OOS template You can associate a lifecycle hook with an OOS template. When the lifecycle hook is triggered, Auto Scaling automatically uses the associated OOS template. 2019-08-14 All regions Create a lifecycle hook

July 2019

Feature Description Released on Released in Reference
Support for mixed instance allocation in the cost optimization policy When you set the multi-zone scaling policy to cost optimization policy, pay-as-you-go instances and preemptible instances are created based on the specified capacity. 2019-07-02 All regions Create a scaling group

May 2019

Feature Description Released on Released in Reference
Step scaling rule You can create a step scaling rule and implement fine-grained scaling control based on the size of the alert breach. 2019-05-20 All regions Create a scaling rule
Multiple security groups An automatically created instances can be added to multiple security groups. 2019-05-15 All regions Create a scaling configuration
Query of the endpoint information You can call an API operation to query regions that support Auto Scaling. 2019-05-05 All regions DescribeRegions

April 2019

Feature Description Released on Released in Reference
Predictive scaling rule You can create a predictive scaling rule. With predictive scaling rules, Auto Scaling adjusts the upper and lower limits for instances in a scaling group based on historical monitoring data. 2019-04-18 All regions Create a predictive scaling rule
Support for the DiskName, DiskDescription, and Encrypted parameters in scaling configurations You can set the disk name, disk description, and encryption for a scaling configuration. 2019-04-04 All regions Create a scaling configuration

January 2019

Feature Description Released on Released in Reference
Target tracking scaling rule You can create a target tracking scaling rule. With target tracking scaling rules, Auto Scaling adjusts the number of ECS instances based on the specified target values. 2019-01-11 All regions Create a scaling rule

December 2018

Feature Description Released on Released in Reference
Support for changing VSwitches You can change the VSwitches associated with a scaling group. 2018-12-28 All regions Modify a scaling group
Cost optimization policy The multi-zone scaling policy supports the cost optimization policy. 2018-12-16 All regions
VServer groups You can specify VServer groups for SLB instances in a scaling group. 2018-12-07 All regions Use SLB in Auto Scaling

November 2018

Feature Description Released on Released in Reference
No Fees for Stopped Instances (VPC-Connected) After this feature is enabled, ECS instances that you remove from a scaling group are stopped and not charged for resources allocated to them. 2018-11-28 All regions

October 2018

Feature Description Released on Released in Reference
Enhanced whitelists of ApsaraDB for RDS instances You can add internal IP addresses of the ECS instances in a scaling group to the enhanced whitelists of the associated ApsaraDB for RDS instances. 2018-10-19 All regions Create a scaling group

September 2018

Feature Description Released on Released in Reference
Auto Scaling released in the UK (London) region Auto Scaling is available in the UK (London) region. 2018-09-30 All regions What is Auto Scaling?
Shutdown and reclaim mode You can configure the shutdown and reclaim mode for a scaling group. 2018-09-13 All regions Create a scaling group
Launch template You can specify a launch template as the instance configuration source for a scaling group. 2018-09-01 All regions Create a scaling group

August 2018

Feature Description Released on Released in Reference
Cron expressions for scheduled tasks You can use a cron expression to specify the recurrence for a scheduled task. 2018-08-20 All regions Create a scheduled task
Notifications for scheduled task expiration You can configure an expiration notification for scheduled tasks. 2018-08-20 All regions Create an event notification

July 2018

Feature Description Released on Released in Reference
Modification of information about data disks and preemptible instances You can modify information about data disks and the price limits of preemptible instances in scaling configurations. 2018-07-27 All regions Modify scaling configurations
Association with ApsaraDB for RDS instances You can associate or dissociate ApsaraDB for RDS instances with or from a scaling group. 2018-07-11 All regions Modify a scaling group
Association with SLB instances You can associate or dissociate SLB instances with or from a scaling group. 2018-07-04 All regions Modify a scaling group

June 2018

Feature Description Released on Released in Reference
Modification of scaling configurations You can modify existing scaling configurations. 2018-06-27 All regions Modify scaling configurations
Lifecycle hooks When an ECS instance is automatically created or removed from a scaling group, lifecycle hooks can be used to put the instance into the wait state. This allows you to perform operations on the instance. 2018-06-01 All regions Create a lifecycle hook

April 2018

Feature Description Released on Released in Reference
Scaling activity notification When a scaling activity of a specified type occurs in a scaling group, Auto Scaling sends notifications to Cloud Monitor or Message Service. 2018-04-20 All regions Event notification overview

March 2018

Feature Description Released on Released in Reference
Protected state You can put ECS instances in a scaling group into the protected state. Instances in the protected state are not released or removed from the scaling group during scale-in events. 2018-03-28 All regions Switch to the protected state for an ECS instance
Standby state You can put ECS instances in a scaling group into the standby state and manage the lifecycle of the ECS instances. 2018-03-15 All regions Move ECS instance to Standby

2015

Service Description Released on Released in Reference
Auto Scaling Auto Scaling is released. 2015-08-27 Some regions What is Auto Scaling?

2014

Service Description Released on Released in Reference
Auto Scaling Auto Scaling is released for internal preview. 2014-10-15 Some regions What is Auto Scaling?