Auto Scaling:Release notes

Feature

Description

Release date

Region

References

Support for event bus as the notification method

The event bus feature of EventBridge is supported. If you use an event bus as the notification method for lifecycle hooks, Auto Scaling sends notifications of the ess:LifecycleHook:ScaleOut type for scale-outs and notifications of the ess:LifecycleHook:ScaleIn type for scale-ins when lifecycle hooks take effect. You can also troubleshoot issues based on these notifications.

2023-06-26

All regions

• CreateLifecycleHook

• ModifyLifecycleHook

• DescribeLifecycleHooks

Feature

Description

Release date

Region

References

Support for the ECS Current Connections metric

The ECS Current Connections metric is supported. When you create an event-triggered task of the system monitoring type for a scaling group of the ECS type, you can specify the (ECS) ECS Current Connections metric. This metric is used to monitor the current number of network connections to ECS instances in the scaling group, which helps you better understand the network load of the ECS instances.

2023-05-25

All regions

Event-triggered tasks of the system monitoring type

Feature

Description

Release date

Region

References

Support for billing diagnosis and inventory diagnosis

Billing diagnosis and inventory diagnosis are supported. The billing diagnosis feature allows you to check whether your Alibaba Cloud account has overdue payments. The inventory diagnosis feature allows you to check whether the instance types that are specified in your scaling configuration have sufficient resources. Billing diagnosis and inventory diagnosis help you detect and resolve issues at the earliest opportunity.

2023-04-18

All regions

Health diagnosis

Support for sequential and unique instance names or hostnames

Naming rules to generate sequential and unique instance names or hostnames are supported in scaling configurations. Auto Scaling generates sequential and unique instance names or hostnames for ECS instances that are created during scale-outs based on the naming rules. You can use the instance names or hostnames to manage ECS instances in an efficient manner.

2023-04-15

All regions

Configure naming rules for ECS instances

Support for logon to ECS instances by using ecs-user

ecs-user can be used to log on to ECS instances that are created by Auto Scaling during scale-outs. To use ecs-user, set the ImageOptions.LoginAsNonRoot parameter to Yes when you call an API operation to create a scaling configuration of the ECS type.

2023-04-12

All regions

CreateScalingConfiguration

Support for the weight setting of backend server groups

The weights of backend server groups of the associated Server Load Balancer (SLB) instances can be specified. When you create a scaling group, you can specify weights for instances that are added as backend servers to the backend server groups. When you create a scaling configuration, you can also configure the SLB Weight parameter to specify weights for instances that are added as backend servers.

2023-04-10

All regions

Attach or detach SLB instances to or from scaling groups

Support for the (ALB) QPS per Backend Server metric

The (ALB) QPS per Backend Server metric can be used to create even-triggered tasks and enable automatic scaling activities. This increases the availability of your applications.

2023-04-03

All regions

Enable automatic scaling of elastic container instances by using the (ALB) QPS per Backend Server metric

Feature

Description

Release date

Region

References

Support for the health diagnosis feature

The health diagnosis feature of Auto Scaling is supported. You can use the health diagnosis feature to check the health status of your scaling group in a comprehensive manner. This way, you can detect exceptions in your scaling group at the earliest opportunity and resolve common issues. This improves the success rate of your scaling activities.

2023-03-21

All regions

Health diagnosis

Feature

Description

Release date

Region

References

Support for association with Network Load Balancer (NLB) instances

NLB instances can be associated with scaling groups. After you associate an NLB instance with a scaling group, Auto Scaling adds the ECS instances or elastic container instances that are added to the scaling group as backend servers of the associated NLB instance. This way, the NLB instance can forward access requests to backend servers in an efficient manner.

2023-02-03

All regions

• AttachServerGroups

• DetachServerGroups

Feature

Description

Release date

Region

References

Support for update of the Containers settings

The Containers settings in scaling configurations that are used to create elastic container instances can be updated in full update or incremental update mode. You can select the update mode based on your business requirements.

2023-01-03

All regions

ModifyEciScalingConfiguration

Support for query of the image source

The image source of a scaling configuration can be queried. You can call the DescribeScalingConfigurations API operation to query the image source of your scaling configuration. The image source of your scaling configuration can be a public image, a custom image, or an Alibaba Cloud Marketplace image.

2023-01-10

All regions

DescribeScalingConfigurations

Feature

Description

Release date

Region

References

Support for addition of scaling groups to resource groups

Scaling groups can be added to resource groups. When you create a scaling group, you can specify a resource group for the scaling group and grant specific permissions to the resource group. This way, you can manage your scaling groups in a fine-grained manner.

2022-12-27

All regions

• CreateScalingGroup

• ModifyScalingGroup

• DescribeScalingGroups

Feature

Description

Release date

Region

References

Support for the lifecycleActionResult parameter

The lifecycleActionResult parameter is included in a notification that is sent to the specified CloudOps Orchestration Service (OOS) template when a lifecycle hook takes effect. This parameter specifies the subsequent action that is performed after a lifecycle hook times out. When the specified OOS template fails to be executed, you can end the lifecycle hook ahead of schedule based on the value of the lifecycleActionResult parameter.

2022-11-02

All regions

• CreateLifecycleHook

• ModifyLifecycleHook

Support for the SyncActivity parameter

The SyncActivity parameter is supported by scaling groups that have an expected number of instances. Auto Scaling allows you to execute scaling activities in a synchronous or asynchronous manner. You can execute scaling activities based on your business requirements to improve the success rate of the activities.

2022-11-02

All regions

ScaleWithAdjustment

Feature

Description

Release date

Region

References

Support for custom scale-in policies (Function)

The CustomPolicy setting is supported for the RemovalPolicy parameter. The CustomPolicyARN parameter is supported to specify custom scale-in policies. You can create custom scale-in policies by using functions to remove ECS instances from a scaling group. This allows you to remove instances from scaling groups in a more flexible manner.

2022-10-14

All regions

• Use Function Compute to create custom scale-in policies for ECS instances

• CreateScalingGroup

• ModifyScalingGroup

Support for disabling or enabling lifecycle hooks

Lifecycle hooks can be enabled or disabled. You can enable or disable lifecycle hooks in the Auto Scaling console or by calling the ModifyLifecycleHook operation. Lifecycle hooks that are in the Disabled state do not take effect. We recommend that you enable or disable lifecycle hooks based on your business requirements.

2022-10-13

All regions

• Disable or enable lifecycle hooks

• ModifyLifecycleHook

• DescribeLifecycleHooks

Feature

Description

Release date

Region

References

Support for the maximum life span feature of ECS instances

The Maximum Life Span of Instance parameter is supported for scaling groups that contain ECS instances. If the maximum life span of an ECS instance expires, Auto Scaling creates an ECS instance to replace the expired ECS instance.

2022-08-25

All regions

• Create scaling groups

• CreateScalingGroup

• ModifyScalingGroup

• DescribeScalingGroups

Feature

Description

Release date

Region

References

Support for the cost optimization feature of elastic container instances

The cost optimization feature is supported for scaling groups that contain elastic container instances. After you enable the cost optimization feature, Auto Scaling compares the prices of ECS instance types, and then selects the ECS instance type that is provided at the lowest price and creates elastic container instances of this type based on your business requirements. This way, the elastic container instances that host your applications can be scaled automatically and at lower costs.

2022-07-29

All regions

• CreateEciScalingConfiguration

• ModifyEciScalingConfiguration

• DescribeEciScalingConfigurations

Support for multi-metric alert rules in event-triggered tasks

Multi-metric alert rules are supported in event-triggered tasks. In a multi-metric alert rule, you can specify whether all metrics must meet the alert conditions before an automatic scaling activity is triggered or only one of the metrics must meet the alert condition before an automatic scaling activity is triggered. For example, you can specify that both the CPU utilization and the memory usage must reach the thresholds before a scaling activity is triggered.

2022-07-27

All regions

• Manage event-triggered tasks

• CreateAlarm

• ModifyAlarm

• DescribeAlarms

Support for ESSD AutoPL disks

The ESSD AutoPL disks are supported in scaling configurations and launch templates. This way, you can create ECS instances that use ESSD AutoPL disks in scaling groups. ESSD AutoPL disks inherit the features and performance of enterprise SSDs (ESSDs) and provide the capability of decoupling disk capacity from disk performance.

2022-07-14

All regions

• CreateScalingConfiguration

• ModifyScalingConfiguration

• DescribeScalingConfigurations

Feature

Description

Release date

Region

References

Support for putting elastic container instances into or moving elastic container instances out of the Standby state

The EnterStandby and ExitStandby operations are supported. You can call the EnterStandby API operation to put an elastic container instance into the Standby state. You can call the ExitStandby API operation to move an elastic container instance out of the Standby state.

2022-06-29

All regions

• EnterStandby

• ExitStandby

Support for attaching elastic container instances to or detaching elastic container instances from ALB instances and ApsaraDB RDS instances, and support for adding elastic container instances to or removing elastic container instances from vServer groups and ALB server groups

API operations can be called to attach elastic container instances to or detach elastic container instances from ALB instances and ApsaraDB RDS instances. API operations can be called to add elastic container instances to or remove elastic container instances from one or more vServer groups or ALB server groups.

2022-06-14

All regions

• AttachLoadBalancers

• DetachLoadBalancers

• AttachDBInstances

• DetachDBInstances

• AttachVServerGroups

• DetachVServerGroups

• AttachAlbServerGroups

• DetachAlbServerGroups

Support for filter conditions in intelligent configuration mode

Filter conditions are supported in intelligent configuration mode to help you select instance types in an efficient manner. For example, you can specify the following filter conditions in intelligent configuration mode: the instance types that you want to exclude, the instance architecture, and whether to include burstable instance types.

2022-06-08

All regions

• CreateScalingConfiguration

• DescribeScalingConfigurations

• ModifyScalingConfiguration

Support for the 15-second statistical period by CloudMonitor metrics

The 15-second statistical period can be applied to the CpuUtilizationAgent metric. For other metrics, the statistical period can be 60 seconds, 120 seconds, 300 seconds, or 900 seconds.

2022-06-08

All regions

• CreateAlarm

• ModifyAlarm

Support for the ScaleWithAdjustment operation by scaling groups with an expected number of instances

The ScaleWithAdjustment operation is supported. If you specify an expected number of instances but do not create scaling rules when you create your scaling group, you can call the ScaleWithAdjustment operation to automate scaling.

2022-06-06

All regions

ScaleWithAdjustment

Feature

Description

Release date

Region

References

Support for lifecycle hooks on elastic container instances

Lifecycle hooks are supported on elastic container instances. You can use lifecycle hooks to manage the lifecycles of elastic container instances in a scaling group. You can use lifecycle hooks to suspend scaling activities that are triggered by Auto Scaling and put elastic container instances into the Pending Add or Pending Remove state. You can perform operations on the elastic container instances until the timeout period of your lifecycle hooks ends.

2022-05-17

All regions

• Overview

• Manage lifecycle hooks

Feature

Description

Release date

Region

References

Support for the AttachInstances and DetachInstances operations by elastic container instances

The AttachInstances operation can be called to add elastic container instances to a scaling group. The DetachInstances operation can be called to remove elastic container instances from a scaling group.

2022-04-24

All regions

• AttachInstances

• DetachInstances

Support for resource-level authentication and tag-based authentication

Resource-level authentication and tag-based authentication are supported. Different Resource Access Management (RAM) users have different permissions on Auto Scaling resources.

2022-04-13

All regions

• Manage Auto Scaling resources by resource authentication

• Manage Auto Scaling resources by tag-based authentication

Feature

Description

Release date

Region

References

Support for health checks on elastic container instances

Health checks can be performed on elastic container instances in a scaling group at specified intervals. This way, elastic container instances that are unhealthy can be replaced in a timely manner. If an elastic container instance in a scaling group is not in the Running state, Auto Scaling considers the instance unhealthy and creates an elastic container instance to replace the unhealthy instance.

2022-02-24

All regions

• Manage scaling groups

• Instance lifecycles

Feature

Description

Release date

Region

References

Support for asynchronous interaction

An ECS instance can be put into the Standby state or moved out of the Standby state in an asynchronous manner.

2021-11-29

All regions

• Manually change the status of instances

• Remove an ECS instance from the Standby state

Support for evaluation of ECS instance availability

The scaling strength feature is provided. You can use this feature to evaluate the availability of ECS instances and improve the success rate of scale-out activities.

2021-11-28

All regions

Scaling strength

Support for automatic notification when errors occur in scaling groups

If your scaling group is abnormal, an error message is displayed in the Auto Scaling console. The error message helps you identify and fix the errors at the earliest opportunity.

2021-11-16

All regions

View scaling groups

Support for the configuration of capacity reservation

The Capacity Reservation parameter can be configured for ECS instances or elastic container instances when you create or modify a scaling configuration.

2021-11-02

All regions

• Create a scaling configuration of the ECS type

• Create a scaling configuration of the Elastic Container Instance type

• Modify a scaling configuration

Feature

Description

Release date

Region

References

Support for automatic scaling of elastic container instances

Elastic container instances can be automatically scaled in a scaling group.

2021-10-20

All regions

• Manage scaling groups

• Create a scaling configuration of the Elastic Container Instance type

Feature

Description

Release date

Region

References

Intelligent configuration

Support for intelligent configuration in scaling configurations Intelligent configuration is supported to automatically filter instance types that meet your scale-out requirements.

2021-09-09

All regions

• Create a scaling configuration of the ECS type

• Use the Specify Instance Pattern feature in a scaling configuration

• CreateScalingConfiguration

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 regions

• Manage scaling groups

• CreateScalingGroup

• RemoveInstances

Feature

Description

Release date

Region

References

Support for association with ALB server groups

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 group.

2021-06-11

All regions

• Manage scaling groups

• AttachAlbServerGroups

Feature

Description

Release date

Region

References

Vertical scaling

The specifications of pay-as-you-go instances can be changed. The specifications include the number of vCPUs and the memory size.

2021-03-31

All regions

Overview

Feature

Description

Release date

Region

References

Scaling configuration

Weights can be specified for instance types.

2021-02-12

All regions

• Create a scaling configuration of the ECS type

• Use performance metrics to measure Auto Scaling

• CreateScalingConfiguration

Feature

Description

Release date

Region

References

Scaling configuration

Unique sequential hostnames can be automatically generated.

2021-01-15

All regions

• Create a scaling configuration of the ECS type

• Configure naming rules for ECS instances

• CreateScalingConfiguration

Feature

Description

Release date

Region

References

Scaling configuration

The performance levels (PLs) of system disks or data disks of the ESSD category can be specified in scaling configurations.

2020-11-18

All regions

• Create a scaling configuration of the ECS type

• CreateScalingConfiguration

Feature

Description

Release date

Region

References

Event-triggered task

More statistical methods are supported in event-triggered tasks for custom metrics.

2020-10-25

All regions

• Manage event-triggered tasks

• CreateAlarm

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 regions

Update an image in a scaling configuration

Feature

Description

Release date

Region

References

Rolling update

OOS packages can be used to install software.

2020-08-20

Some regions

Rolling update

Expected number of instances

The expected number of instances in a scaling group can be changed when instances are deleted or removed from the scaling group.

2020-08-12

All regions

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 regions

Create a scheduled task

Feature

Description

Release date

Region

References

Modification of scaling groups

The health check feature can be enabled or disabled for instances in an existing scaling group.

2020-07-30

All regions

View or modify scaling groups

Feature

Description

Release date

Region

References

Auto Scaling-linked role

The AliyunServiceRoleForAutoScaling role is automatically created when Auto Scaling is activated.

2020-05-06

All regions

Service-linked Role

Feature

Description

Release date

Region

References

Rolling update

Rolling update tasks can be created to update the configurations of ECS instances at the same time.

2020-04-26

Some regions

Rolling update

Feature

Description

Release date

Region

References

Event-triggered task of the system monitoring type

More metrics are supported by event-triggered tasks of the system monitoring type.

2020-03-17

All regions

Event-triggered tasks of the system monitoring type

Scaling group creation

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 in the scaling groups.

2020-03-11

All regions

Manage scaling groups

Feature

Description

Release date

Region

References

Support for suspending and resuming processes in scaling groups

The processes in a scaling group can be suspended or resumed, which allows you to manage scaling operations in a fine-grained manner.

2019-12-03

All regions

• Suspend a scaling process

• Suspend and resume scaling group processes

Feature

Description

Release date

Region

References

Configuration of the health status of ECS instances

An API operation can be called to specify the health status of an ECS instance.

2019-10-25

All regions

SetInstanceHealth

Expected number of instances

The expected number of ECS instances in a scaling group can be specified. This way, Auto Scaling can execute parallel scaling activities.

2019-10-22

All regions

Expected number of instances

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 information about the configuration of an instance and then automatically create a scaling configuration.

2019-09-24

All regions

CreateScalingGroup

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 executes the associated OOS template.

2019-08-14

All regions

Manage lifecycle hooks

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 specified capacity.

2019-07-02

All regions

Manage scaling groups

Feature

Description

Release date

Region

References

Step scaling rule

A step scaling rule can be created to manage scaling activities based on the size of the rule breach.

2019-05-20

All regions

Manage scaling rules

Support for multiple security groups

An instance that is automatically created can be added to multiple security groups.

2019-05-15

All regions

Create a scaling configuration of the ECS type

Support for query of the region information

An API operation can be called to query the regions where Auto Scaling is available.

2019-05-05

All regions

DescribeRegions

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 regions

Overview

Support for the DiskName, DiskDescription, and Encrypted parameters in scaling configurations

The DiskName, DiskDescription, and Encrypted parameters in scaling configurations can be configured.

2019-04-04

All regions

Create a scaling configuration of the ECS type

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 values.

2019-01-11

All regions

Manage scaling rules

Feature

Description

Release date

Region

References

Support for change of vSwitches

The vSwitches that are associated with a scaling group can be changed.

2018-12-28

All regions

Modify scaling groups

Cost optimization

The multi-zone scaling policy can be set to cost optimization.

2018-12-16

All regions

• Manage scaling groups

• Combine a cost optimization policy with the selection of multiple instance types

vServer group

vServer groups can be specified for the SLB instance that is associated with a scaling group.

2018-12-07

All regions

Attach or detach SLB instances to or from scaling groups

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 regions

• Manage scaling groups

• CreateScalingGroup

• RemoveInstances

Feature

Description

Release date

Region

References

Enhanced IP address whitelists of ApsaraDB RDS instances

The private IP addresses of ECS instances in a scaling group can be added to the enhanced IP address whitelists of the ApsaraDB RDS instances that are associated with the scaling group.

2018-10-19

All regions

Manage scaling groups

Feature

Description

Release date

Region

References

New region

Auto Scaling is available in the UK (London) region.

2018-09-30

All regions

What is Auto Scaling?

Support for shutdown and reclaim mode

The shutdown and reclaim mode can be specified for a scaling group.

2018-09-13

All regions

Manage scaling groups

Support for launch templates

A launch template can be specified as an instance configuration source for a scaling group.

2018-09-01

All regions

Manage scaling groups

Feature

Description

Release date

Region

References

Support for cron expressions

Cron expressions can be used to specify the recurrence period of scheduled tasks.

2018-08-20

All regions

Manage a scheduled task

Expiration notification for scheduled tasks

Expiration notifications for scheduled tasks can be configured.

2018-08-20

All regions

Manage event notification rules

Feature

Description

Release date

Region

References

Support for modification of information about data disks and the price limits of preemptible instances

Information about data disks and the price limits of preemptible instances in scaling configurations can be modified.

2018-07-27

All regions

Modify a scaling configuration

Support for association with ApsaraDB RDS instances

ApsaraDB RDS instances can be associated with or disassociated from scaling groups.

2018-07-11

All regions

Modify scaling groups

Support for association with SLB instances

SLB instances can be associated with or disassociated from scaling groups.

2018-07-04

All regions

Modify scaling groups

Feature

Description

Release date

Region

References

Support for modification of scaling configurations

Existing scaling configurations can be modified.

2018-06-27

All regions

Modify a scaling configuration

Support for lifecycle hooks

If an ECS instance is automatically created for or removed from a scaling group, lifecycle hooks can be used to put the instance into the Pending Add or Pending Remove state. This way, you can perform desired operations on the instance.

2018-06-01

All regions

Manage lifecycle hooks

Feature

Description

Release date

Region

References

Support for scaling activity notifications

When a specific type of scaling activity occurs in a scaling group, notifications can be sent to CloudMonitor or Message Service (MNS).

2018-04-20

All regions

Overview

Feature

Description

Release date

Region

References

Support for the Protected state

ECS instances in a scaling group can be put into the Protected state. Instances in the Protected state cannot be released or removed from the scaling group during scale-ins.

2018-03-28

All regions

Put an ECS instance into the Protected state

Support for the Standby state

ECS instances in a scaling group can be put into the Standby state. This way, you can manage the lifecycles of the ECS instances.

2018-03-15

All regions

Manually change the status of instances

Feature

Description

Release date

Region

References

Auto Scaling

Auto Scaling is officially launched.

2015-08-27

Some regions

What is Auto Scaling?

Feature

Description

Release date

Region

References

Auto Scaling

Auto Scaling is in internal preview.

2014-10-15

Some regions

What is Auto Scaling?