Elastic Compute Service:Retain and restore data for spot instances

Procedure

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

2. Follow the on-screen instructions to configure the instance parameters based on your business requirements. Take note of the following parameters. For information about other parameters, see Create an instance on the Custom Launch tab.

   • Billing Method: Select Spot Instance.

   • Instance Interruption Mode: Select Stop in Economical Mode.

   Note

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

   • If you call the RunInstances operation to create spot instances, set the SpotInterruptionBehavior parameter to Stop to enable the economical mode for the instances.

Procedure

1. After you receive an interruption and reclamation notification for a spot instance, the instance is stopped in economical mode in 5 minutes. You can view the status of the spot instance on the ECS console - Instance page.

   

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

   

   Note

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

   • 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 instance type is in stock. You can also call the DescribeAvailableResource operation to query the inventory.

Flowchart

Retain data

Considerations

• The disks that you want to attach to a new instance are in the Unattached (Available) state.

• The instance to which you want to attach the disks 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

This section describes how to create a snapshot for a cloud disk on the Instance page in the ECS console. You can also create a snapshot for a cloud disk on the Snapshots or Block Storage page.

1. Go to the ECS console - Instance page.

2. In the top navigation bar, select the region and resource group of the resource that you want to manage.

3. Click the ID of the instance from which you want to create a snapshot. Select the Snapshots tab and then click Create Disk Snapshot.

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

   Parameter		Description
   Resource Type		Default value: Cloud Disk, which allows you to create a snapshot for a cloud disk. Note You can also set this parameter to Instance and select one or more ECS instances to create a snapshot-consistent group. Then, select the cloud disks for which you want to create snapshots from the ECS instances to ensure disk data consistency. For more information, see Create a snapshot-consistent group.
   Cloud Disk		Select the disk for which you want to create a snapshot. You can select a system disk or a data disk.
   Snapshot Name		Specify a name for the snapshot.
   Retention Period		Specify the retention period of the snapshot. Valid values: Permanently (Until Deleted) and Retained for. Permanently (Until Deleted): The snapshot is permanently retained and does not expire. After the maximum number of snapshots is reached, new snapshots cannot be created. Retained for: Specify a retention period in days for the snapshot. After the retention period of the snapshot ends, the snapshot expires and is automatically deleted. Note For the quotas on manual snapshots, see Overview. If you specify a retention period for a snapshot, Released After xx Days is highlighted in the Retention Period column on the Disk Snapshots tab when the snapshot is a few days, such as 3 days, away from expiration. You can extend the retention period of a snapshot before the snapshot expires. For more information, see Extend the retention period of a snapshot. To prevent unnecessary costs, we recommend that you delete unneeded snapshots at the earliest opportunity, regardless of whether the snapshots are retained permanently or for a specific number of days. For more information, see Delete a snapshot.
   Advanced Settings	Instant Access	By default, the instant access feature is enabled for Enterprise SSD (ESSD) series disks (ESSDs, ESSD AutoPL disks, ESSD Entry disks, and Regional ESSDs)and is disabled for cloud disks of other categories. Note The instant access feature allows you to use snapshots for operations, such as rolling back cloud disks, creating cloud disks, or sharing snapshots, within seconds after the snapshots are created, instead of after the snapshots are uploaded to OSS. For more information, see Use the instant access feature.
   	Tag	Specify tag key-value pairs for the snapshot to facilitate management.
   	Resource Group	Specify a resource group to which to assign the snapshot. You can use resource groups to manage snapshots at different levels.

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

   

   • In the Progress column, view the upload progress of the snapshot to OSS. When you move your pointer over Progress of Upload to OSS: xx%, the system displays the estimated remaining time for the upload.

     Note

     • The estimated remaining time to upload a snapshot to OSS dynamically varies based on multiple factors. For more information, see the Considerations section of the "Create a snapshot" topic.

     • You can call the DeleteSnapshot operation to cancel an ongoing snapshot creation task.

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

6. Click the ID of the spot instance to go to the instance details page. In the upper-right corner of the page, click All Actions. In the pane that appears, search for and click Create Custom Image.

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

   The time required to create an image varies based on the disk size. You must wait until the snapshot of each disk is created before you can use the image.

Procedure

1. Go to the ECS console - Images page.

2. In the top navigation bar, select the region and resource group of the resource that you want to manage.

3. Find the image that you want to use and click Create Instance in the Actions column.

   

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