Elastic Compute Service:Retain and restore spot instance data

Procedure

1. Log on to the ECS console, go to the instance buy page, and click the Custom Launch tab.

2. Configure the instance parameters. Note the following parameters. For other parameters, see Create an instance with Custom Launch.

   • Billing Method: Select Spot Instance.

   • Instance Interruption Mode: Select Stop in Economical Mode.

   Note

   • After a spot instance is stopped in economical mode, computing resources (vCPUs, GPUs, and memory), static public IP address, and associated public bandwidth are reclaimed and no longer billed. Billing continues for other resources such as cloud disks (system disk and data disks), elastic IP addresses (if any), and snapshots.

   • To create spot instances by API, call the RunInstances operation and set SpotInterruptionBehavior to Stop to enable the economical mode.

Procedure

1. After you receive an interruption notification, the spot instance is stopped in economical mode within 5 minutes. View the instance status on the ECS console - instances page.

   The spot instance status is displayed as Stopped with the Economical Mode label.

2. After the spot instance is stopped in economical mode, click Start when the market price does not exceed the bid price and inventory is sufficient. You can also call the StartInstance or StartInstances operation.

   Note

   • To query the market price, go to the instance buy page, select the instance type, and view its price history. You can also call the DescribeSpotPriceHistory operation.

   • To query the inventory, go to the instance buy page and select the spot instance type. If you can create a new spot instance, the type is in stock. You can also call the DescribeAvailableResource operation.

Flowchart

Retain data

Usage notes

• The disks are in the Unattached (Available) state.

• The target instance is in the Running (Running) or Stopped (Stopped) state, and not in the Locked (Locked) state.

Procedure

• Attach the system disk to another instance as a data disk for repair.

• Attach the data disks to another instance.

Procedure

The following steps describe how to create a snapshot on the Instance page in the ECS console. You can also create snapshots on the Snapshots or Block Storage page.

1. Go to the ECS console - instances.

2. In the upper-left corner of the page, select a region and resource group.

3. Click the instance ID. Select the Snapshots tab and click Create Disk Snapshot.

4. In the Create Snapshot dialog box, configure the snapshot parameters and then click OK.

   Parameter		Description
   Resource type		By default, Cloud Disk is selected to create a snapshot for a single cloud disk. Note You can also select Instance. Then, select one or more cloud disks from the instance to create a snapshot consistency group and create snapshots for multiple disks within the group. This ensures data consistency across the disks. For more information, see Create a snapshot consistency group.
   Select Cloud Disk		Select the cloud disk for which you want to create a snapshot. This can be a system disk or a data disk.
   Snapshot name		Enter a name for the snapshot.
   Retention period		Set the retention period for the snapshot. You can choose to retain it permanently or specify a custom number of days. Retain permanently: After the snapshot quota is reached, you cannot create new snapshots. Custom retention period: The snapshot is automatically deleted after the specified retention period ends. Note For information about the quota for manual snapshots, see Snapshot overview. If you specify a custom retention period, the Retention Period column in the snapshot list displays the Released After xx Days message in highlighted text when only three days are left before the snapshot expires. You can extend the retention period before the snapshot expires. For more information, see Extend the retention period of a snapshot. Regardless of whether a snapshot is retained permanently or for a custom period, delete the snapshot when it is no longer needed to avoid incurring charges. For more information, see Delete a snapshot.
   Advanced Configurations	Instant Access	The Instant Access feature is enabled by default for ESSD series disks (ESSD, ESSD AutoPL, ESSD Entry, and regional ESSD) and disabled by default for other types of cloud disks. Note The Instant Access feature makes snapshots available within seconds of being created. You can use a snapshot immediately for operations such as rolling back a cloud disk, creating a new cloud disk, or sharing the snapshot, without having to wait for the snapshot to be fully uploaded to OSS. For more information, see Snapshot Instant Access.
   	Tags	Add key-value tags to the snapshot to help manage your resources.
   	Resource Group	Assign the snapshot to a resource group to manage your resources by category.

5. (Optional) View the snapshot creation progress on the Disk Snapshots tab.

   • In the Progress column, view the upload progress to OSS. Hover over Progress of Upload to OSS: xx% to see the estimated remaining time.

     Note

     • The estimated remaining time varies dynamically. See the Considerations section of the "Create a snapshot" topic.

     • To cancel an ongoing snapshot creation, call the DeleteSnapshot operation.

   • If Progress of Upload to OSS: 100% is displayed, the snapshot upload is complete and the disk data is backed up.

6. Click the spot instance ID. In the upper-right corner, click All Actions, then search for and click Create Custom Image.

7. In the Create Custom Image dialog box, configure the parameters and click OK.

   Image creation time varies based on disk size. Wait until the snapshot of each disk is created before using the image.

Procedure

1. Go to the ECS console - images page.

2. In the upper-left corner of the page, select a region and resource group.

3. Find the image and click Create Instance in the Actions column.

4. On the Custom Launch tab, click Custom Images in the Images section. Verify that the custom image from the previous step is selected. For other parameters, see Create an instance with Custom Launch.