If a system failure or an incorrect operation occurs on an ECS instance, you can use a backup point to roll back the instance or create a new instance from the backup. This topic describes how to restore an entire ECS instance.
Prerequisites
An ECS instance backup is available. For more information, see Back up an ECS instance.
If the source ECS instance exists, you can restore it directly. If the source ECS instance is released, you can restore the data by cloning a new ECS instance.
Mechanism and business impacts of an ECS instance restoration
Mechanism
To restore an entire instance, you select a backup point, which is a previously created snapshot. The system then performs one of the following operations based on the restoration method:
Direct restoration: The system uses the data from the backup point to restore the disks of the original ECS instance, including the system disk and data disks. This ensures that all files and configurations match those of the backup point.
Cloning: The system uses the data from the backup point to clone a new ECS instance. This ensures that all files and configurations match those of the backup point.
Business impacts
For business systems that depend on a domain controller, you may need to rejoin the domain after the restoration. For more information, see Build an AD domain on a Windows instance.
The network configuration of the newly created ECS instance may change. Adjust the network settings as needed.
Restore an instance by cloning
If an ECS instance experiences a system failure or an incorrect operation, you can use the cloning method to restore the instance by creating a new instance from a backup.
Log on to the Cloud Backup console.
In the navigation pane on the left, choose .
In the top navigation bar, select a region.
On the Backed-up ECS Instances tab, click the
icon next to the target ECS instance.On the Instance Protection tab, find an available backup point and click Clone.
In the Create ECS Instance from Backup panel, select a virtual private cloud (VPC) and a vSwitch, and then enter a hostname and an instance name.
Click Create.
NoteThe new ECS instance is billed based on ECS billing rules. For more information, see Pay-as-you-go.
After the instance is created, you can view the cloning progress on the Jobs tab.
Restore an instance directly
If an ECS instance experiences a system failure or an incorrect operation, you can use the direct restoration method to roll back the instance to a previous state.
Log on to the Cloud Backup console.
In the navigation pane on the left, choose .
In the top navigation bar, select a region.
On the Backed-up ECS Instances tab, click the
icon next to the target ECS instance.On the Instance Protection tab, select an available backup point and click Restore.
ImportantYou can restore an ECS instance only if it is stopped and no backup job is running for the instance. After you restore the data of an entire ECS instance to a specific point in time, any data that was generated on the protected disk after that point in time will be lost. Perform this operation with caution.
In the dialog box that appears, select Start the ECS instance after the rollback as needed, and then click Ok.
After the restoration job is created, you can view its progress on the Jobs tab.
