Create and manage snapshots/schedules

Snapshot

Create snapshot

You can create a snapshot of the current state of a volume.

caution

If the volume size has been expanded, you must perform a full backup even if previous snapshots exist. Incremental backups may fail or create unusable snapshots in such cases.

Create snapshot by selecting a volume

1. Go to the KakaoCloud console > Beyond Compute Service > GPU.

2. Click the Volume menu, then click the [More options] icon for the volume to snapshot > Create snapshot.

3. In the Create snapshot popup, enter the information and click [Create].

   Category	Description
   Selected volume	The volume to snapshot
   Snapshot type	Method for creating the snapshot - Full: Creates a full backup copy of all data at the time of execution, regardless of changes   e.g., a 50GB volume creates a 50GB snapshot - Incremental: Backs up only data changed since the last snapshot   e.g., if 1GB of data changed, only 1GB is backed up   Requires a full backup to be completed first
   Snapshot name	Auto-generated from volume name, or can be entered manually
   Snapshot description (optional)	Description of the snapshot

Create snapshot from the snapshot tab

1. Go to the KakaoCloud console > Beyond Compute Service > GPU.
2. Click the Snapshot menu, then click Create snapshot at the top right.
3. In the Create snapshot popup, enter the information and click [Create].

info

Even if you have a full backup from a snapshot schedule, you must create a full snapshot manually the first time.

View snapshot list

You can view the list of snapshots you own and check basic information about each.

1. Go to the KakaoCloud console > Beyond Compute Service > GPU.

2. Click the Snapshot menu to view the list.

   Category	Description
   Type	Type of snapshot created
   Name	Name of the snapshot
   Status	Status of the snapshot
   Volume ID	Unique ID of the source volume
   Size	Size of the snapshot
   Snapshot schedule	- -: Manually created - Schedule name: Automatically created by policy
   Created by	User who created the snapshot
   Created at	Timestamp of snapshot creation - Hover to see elapsed time
   More options	Perform actions per item - Edit snapshot: Edit snapshot name/description - Restore snapshot: Create a new volume from the snapshot - Delete snapshot: Delete the snapshot

Restore volume from snapshot

You can restore a volume to a specific point in time by selecting a snapshot.

Restore from the snapshot tab

1. Go to the KakaoCloud console > Beyond Compute Service > GPU.
2. In the Snapshot menu, click the [More options] icon for the desired snapshot > Restore snapshot.
3. In the Restore snapshot popup, click [Restore snapshot].

Restore from the volume tab

1. Go to the KakaoCloud console > Beyond Compute Service > GPU.
2. In the Volume menu, select a volume containing the snapshot.
3. Click the Snapshot menu, then click the [More options] icon for the desired snapshot > Restore snapshot.
4. In the Restore snapshot popup, click [Restore snapshot].

Delete snapshot

You can delete snapshots that are no longer needed.

• If a volume has multiple incremental snapshots, only the last incremental snapshot can be deleted.
• If any incremental snapshots exist, the full snapshot for that volume cannot be deleted.

caution

Deleted snapshots cannot be recovered.

1. Go to the KakaoCloud console > Beyond Compute Service > GPU.
2. In the Snapshot menu, click the [More options] icon for the desired snapshot > Delete snapshot.
3. In the Delete snapshot popup, enter the snapshot name and click [Delete].

Create and manage snapshot schedule

This section explains how to automatically create and delete snapshots at specified intervals for volumes in the Virtual Machine service.

Create snapshot schedule

You can create a new snapshot schedule.

1. Go to the KakaoCloud console > Beyond Compute Service > Virtual Machine.

2. Select the Snapshot schedule tab and click Create snapshot schedule in the top-right corner.

3. In the Create snapshot schedule popup, fill in the details and click [Create].

   Create snapshot schedule

   Category	Description	Detail
   Basic info	Snapshot schedule name	Enter the name for the snapshot schedule
   	Snapshot schedule description (optional)	Enter a description for the schedule
   Method	Full	Creates a full backup at each interval - Copies all data regardless of changes
   	Incremental	Backs up only data changed since the last snapshot - Requires an initial full backup
   Snapshot interval		Set the interval for automatic snapshot creation
   Deletion policy		Automatically deletes snapshots created by the schedule based on the specified condition - Max count: deletes the oldest snapshots when the number exceeds the limit - Retention time: deletes snapshots once the specified time has elapsed

View snapshot schedule list

You can view your active snapshot schedules and their basic information.

1. Go to the KakaoCloud console > Beyond Compute Service > Virtual Machine.

2. In the Snapshot schedule menu, view the list of running snapshot schedules.

   Snapshot schedule list

   Category	Description
   Name	User-defined name of the snapshot schedule
   Description	Description of the snapshot schedule
   Frequency	Automatic snapshot creation interval as defined by the user
   Deletion policy	Method and cycle for automatic deletion of snapshots created by the schedule
   Attached volumes	List of volumes linked to the snapshot schedule
   Created at	Timestamp of schedule creation - Hover to see more detailed time
   More options	Available actions - Edit: Modify the snapshot schedule settings - Attach volume: Attach a volume to the schedule - Detach volume: Detach a volume from the schedule - Delete: Delete the snapshot schedule

Attach volume to snapshot schedule

You can attach a snapshot schedule to an active volume.

1. Go to the KakaoCloud Console > Beyond Compute Service > Virtual Machine menu.

2. In the Snapshot schedule menu, click the [More] icon for the desired schedule and select Attach volume.

3. In the Attach volume popup, select the volume to attach to the snapshot schedule and click the [Save] button.

Detach snapshot schedule from volume

You can detach a volume from a snapshot schedule.

1. Go to the KakaoCloud Console > Beyond Compute Service > Virtual Machine menu.

2. In the Snapshot schedule menu, click the [More] icon for the schedule linked to the volume and select Detach volume.

3. In the Detach volume popup, select the volume to detach and click the [Detach] button.

Delete snapshot schedule

You can delete a snapshot schedule that is no longer needed.

1. Go to the KakaoCloud Console > Beyond Compute Service > Virtual Machine menu.

2. In the Snapshot schedule menu, click the [More] icon for the schedule to delete and select Delete snapshot schedule.

3. In the Delete snapshot schedule popup, enter the name of the snapshot schedule and click the [Delete] button.

Restore data using snapshot

You can restore instance data by creating a volume from a snapshot.

Restore data by creating new instance

This method restores data by creating a new instance, attaching the volume, and retrieving the data.

info

• Snapshot-based data restoration is useful when an instance cannot be booted or accessed via SSH or RDP due to incorrect settings or service failure.
• This document explains how to recover only the backed-up data, not how to restore an OS volume directly as a root volume.

Step 1. Create a snapshot of the instance that requires data recovery (Optional)

💡 If a snapshot already exists, you may skip this step.

1. Stop the instance that requires recovery (an instance that is unbootable or inaccessible). Wait until the instance status becomes Stopped.

2. Refer to Create and manage snapshot/schedule to create a snapshot of the volume containing the data.

Step 2. Create a volume from the snapshot containing the data to be restored (Optional)

💡 If the volume has already been created, skip this step. For instructions, refer to Restore volume from snapshot tab.

Step 3. Create a new instance to restore data

Refer to the Create instance document to create a new instance with the same type and volume size as the one requiring restoration.

Step 4. Attach the volume to the newly created instance

To restore the volume created in Step 2, refer to Attach volume to attach the volume to the new instance.

Step 5. Access the instance and mount the attached volume

Linux

1. Refer to Connect to instance to connect to the new Linux instance created earlier.

2. Check the volumes:

   Check device connection

   lsblk
   Result

   NAME    MAJ:MIN RM  SIZE RO TYPE MOUNTPOINTS
   vda     253:0    0   10G  0 disk 
   ├─vda1  253:1    0    9G  0 part /
   ├─vda14 253:14   0    4M  0 part 
   ├─vda15 253:15   0  106M  0 part /boot/efi
   └─vda16 259:0    0  913M  0 part /boot
   vdb     253:16   0   10G  0 disk 
   ├─vdb1  253:17   0    9G  0 part 
   ├─vdb14 253:30   0    4M  0 part 
   ├─vdb15 253:31   0  106M  0 part 
   └─vdb16 259:1    0  913M  0 part 

3. Check the file system type of the attached volume using file -s:

   Check file system type

   sudo file -s /dev/vdb
   Result

   (ext4)
   /dev/vdb: Linux rev 1.0 ext4 filesystem data, UUID=...
   
   (xfs)
   /dev/vdb: SGI XFS filesystem data ...

4. Verify the integrity of the attached volume using a command suitable for the detected file system:

   Verify integrity (ext4)

   Verify integrity (ext4)

   sudo fsck -n /dev/vdb

   Result

   fsck from util-linux ...
   /dev/vdb: clean ...

   Verify integrity (xfs)

   Verify integrity (xfs)

   sudo xfs_repair -n /dev/vdb

   Result

   Phase 1 ...
   Phase 7 ...

5. Create a directory for mounting:

   Create mount directory

   sudo mkdir -p /mnt/restore

6. Mount the volume as read-only to the created directory:

   Mount command (ext4)

   sudo mount -o ro -t ext4 /dev/vdb /mnt/restore
   Mount command (xfs)

   sudo mount -o ro -t xfs /dev/vdb /mnt/restore

7. Confirm the mount was successful:

   Verify mount

   findmnt /mnt/restore
   Result

   TARGET       SOURCE   FSTYPE OPTIONS
   /mnt/restore /dev/vdb ext4   ro,relatime

Step 6. Restore necessary data from the mounted volume

1. Create the directory to restore the data to:

   Create restore path

   sudo mkdir -p /path/to/restore/

2. Copy data using rsync. Use --checksum if strict integrity is required (may slow down the process for large data):

   Copy data

   sudo rsync -avh --checksum /mnt/restore/ /path/to/restore/
   Result

   sending incremental file list ...
   total size is 2.15G ...

3. Verify the copied data:

   Verify copied data

   ls -alh /path/to/restore/
   Result

   total 2.1G ...

Step 7. Detach the connected volume

1. Unmount the volume:

   Unmount

   sudo umount /mnt/restore

2. Detach the volume from the console using the steps in Detach volume.

caution

You must detach the restored volume from the console after recovery. Leaving it connected may cause data corruption, resource waste, or system conflicts.

Windows

1. Refer to Connect to instance to access the new Windows instance with the attached volume.

2. Verify the volume disk:

   1. Go to Start > Run or press WIN + R.
   2. In the Run dialog, enter diskmgmt.msc and click OK or press Enter.
   3. In Disk Management, check the attached volume disk.
   4. The restored volume is expected to have a partition structure similar to the OS volume mounted on the C drive.

   

3. If the attached volume is detected, set its status to Online.

   

4. Check the mount point (drive letter) for the attached volume.

   • Assume the data to be restored is on the system root partition.
   • Check which path the system partition is mounted to.
   • In the image above, it is mounted to (E:).

   

5. Open File Explorer to verify the mounted drive.

   

Step 6. Restore necessary data from the mounted volume

1. Go to the source and destination directories in File Explorer.
2. Use copy-paste (Drag & Drop) to restore the data.

Step 7. Detach the connected volume

1. Change the connected disk status to Offline.

   

2. Refer to Detach volume to disconnect the restored volume from the console.

Restore data on an active instance

This method restores data by attaching a volume to an existing active instance.

info

Snapshot-based data restoration is useful when an instance cannot be booted or accessed via SSH or RDP due to incorrect settings or service failure.

Step 1. Create a volume from the snapshot containing the data

Refer to Restore volume from snapshot tab to create a volume from the snapshot containing the data.

Step 2. Attach the volume to the instance requiring data recovery

Refer to Attach volume to attach the volume created from the snapshot to the active instance.

Linux

Step 3. Access the instance and mount the attached volume

1. Refer to Connect to instance to access the Linux instance with the attached volume.

2. Check the volumes:

   Check device connection

   lsblk
   Result

   NAME    MAJ:MIN RM  SIZE RO TYPE MOUNTPOINTS
   vda     253:0    0   10G  0 disk
   ├─vda1  253:1    0    9G  0 part /
   ├─vda14 253:14   0    4M  0 part
   ├─vda15 253:15   0  106M  0 part /boot/efi
   └─vda16 259:0    0  913M  0 part /boot
   vdb     253:16   0   10G  0 disk

3. Identify the file system type:

   Check file system type (ext4)

   sudo file -s /dev/vdb

   /dev/vdb: Linux rev 1.0 ext4 filesystem data ...

   Check file system type (xfs)

   sudo file -s /dev/vdb

   /dev/vdb: SGI XFS filesystem data ...

4. Verify the integrity of the attached volume:

   Verify integrity (ext4)

   sudo fsck -n /dev/vdb

   /dev/vdb: clean ...

   Verify integrity (xfs)

   sudo xfs_repair -n /dev/vdb

   Phase 1 ...
   Phase 7 ...

5. Create the mount directory:

   sudo mkdir -p /mnt/restore

6. Mount the volume as read-only:

   Mount command (ext4)

   sudo mount -o ro -t ext4 /dev/vdb /mnt/restore
   Mount command (xfs)

   sudo mount -o ro -t xfs /dev/vdb /mnt/restore

7. Verify the mount:

   findmnt /mnt/restore

Step 4. Restore necessary data

1. Copy data using rsync:

   sudo rsync -avh --checksum /mnt/restore/ /path/to/restore/

2. Verify the copied files:

   ls -alh /path/to/restore/

Step 5. Detach the volume

1. Unmount the volume:

   sudo umount /mnt/restore

2. Detach the volume in the console using Detach volume.

Windows

Step 3. Set the attached volume online

1. Refer to Connect to instance to access the Windows instance.

2. Verify the volume disk:

   1. Press WIN + R, enter diskmgmt.msc, and click OK.
   2. Check the volume in Disk Management.

   

3. Set the volume status to Online:

   

4. Identify the mount path (e.g., D:):

   

5. Open File Explorer and confirm the mounted drive:

   

Step 4. Restore data from the mounted volume

1. Use File Explorer to navigate source and target directories.
2. Use copy-paste (Drag & Drop) to restore the data.

Step 5. Detach the connected volume

1. Change the disk status to Offline:

   

2. Detach the volume from the console using Detach volume.

caution

Be sure to detach the volume in the console after recovery. Keeping it attached may result in data corruption, resource waste, or system conflicts.