How to modify instance maintenance attributes - Elastic Compute Service

Configure how your ECS instance responds to system events, such as automatic restart or stop.

Background

The maintenance attribute defines how an ECS instance behaves during scheduled maintenance and unexpected system events, for example, automatically restart or remain stopped. The following table describes the supported attributes.

Note

Changing a maintenance attribute does not affect an ongoing maintenance process. For example, if an instance is already undergoing automatic restart for recovery, modifying its attribute will not stop the restart.

Instance maintenance attribute	Related system events	Applicable instance types	Description
Automatically Restart (Default)	SystemMaintenance.Reboot SystemFailure.Reboot	All instances that support system events	The instance returns to its pre-event state: If the instance was Running, it automatically restarts. If the instance was Stopped, it remains Stopped.
Stop	SystemMaintenance.Stop SystemFailure.Stop	All instances that support system events	The instance enters the Stopped state. Use this if you have application-level disaster recovery, such as failover or Node Failover, to prevent conflicts from multiple active nodes.
Automatic Redeployment	SystemMaintenance.Redeploy SystemFailure.Redeploy	Only instances that depend on host hardware, such as instances with local disks or SGX encrypted computing. See Instance family. Note After redeployment, data on local disks is cleared and the SGX feature is reset.	The instance is automatically redeployed to another host and continues to run.

To minimize maintenance impact, increase fault tolerance. For example:

Add core applications, such as SAP HANA, to the startup list to prevent service interruptions.
Enable automatic reconnection in your applications, for example, to MySQL, SQL Server, or Apache Tomcat.
If you use SLB, deploy multiple ECS instances in a cluster so that other instances handle requests while one recovers.
Regularly back up local disk data to ensure redundancy in case of redeployment.

Procedure

Go to ECS console - Instances.
In the upper-left corner of the page, select a region and resource group.
Click the instance ID. On the instance details page, click All Operations, then search for and click Modify Instance Maintenance Attributes.
In the Modify Instance Maintenance Attributes dialog box, change the attributes as needed and click OK.
- If the instance has only cloud disks, select one of the following options:
  - Automatically Restart
  - Stop
- If the instance has local disks, select one of the following options:
  - Automatically Restart
  - Stop
  - Automatic Redeployment
On the Instance Details page, verify the updated Maintenance Attribute in the Other Information section.