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    Disk snapshots

    A snapshot (snapshot) of a disk is the state of the file system at a particular point in time.

    Taking a disk snapshot stops the guest OS recording for a short time, saves the state of the system files, and writes all subsequent changes to a separate file. Thus, it is possible to roll back changes to the file system to a certain point or use snapshots as a tool for quickly cloning disks.

    Attention

    Low-latency disk snapshots are removed during virtual machine migration (this can happen when load balancing hypervisors). It is recommended to create a manual backup to save the state of the disk at a certain point.

    MCS control panel

    To create a snapshot of a disk in your MCS account, you should:

    1. Go to the Disks page of the Cloud Computing service.
    2. In the context menu of the disk, select "Create Snapshot":
    3. In the menu for creating a snapshot, specify the name of the snapshot and click "Create snapshot".

    To view the snapshots of a disk, select the "Snapshot list" on the "Disks" page in the context menu of the disk:

    To delete disk snapshots, select the required snapshots on the snapshot view page and click "Delete snapshot"

    OpenStack CLI

    You can also perform operations with disk snapshots in the OpenStack client

    Get a list of snapshots of the specified disk:

     $ openstack volume snapshot list --volume <disk ID>

    Get a list of project disk snapshots:

     $ openstack volume snapshot list --project <project ID>

    Create a snapshot of the disk, if the disk is connected to the instance, add the --force flag:

     $ openstack volume snapshot create --force --volume <disk ID>

    Delete disk snapshot:

     $ openstack volume snapshot delete <snapshot ID>

    Change snapshot properties:

     $ openstack volume snapshot set <property> <snapshot ID>

    Available properties:

    • --name - name
    • --description - description
    • --property - data in key = value format
    • --no-property - remove all additional values

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