Users of the platform can create of virtual machines (VMs) before performing potentially risky actions, such as testing software or modifying the operating system configuration.
A snapshot captures the current state of the VM, including , and allows you to restore the VM to this state when needed. Multiple snapshots can be created for each VM.
If a VM has snapshots created, its configuration cannot be changed. For example, it is not available for VMs with snapshots:
- changing vCPU, RAM, disk space;
- connecting and deleting additional disks;
- adding and removing IP addresses;
- changing network interfaces;
- enabling and disabling SPICE
- Before creating a snapshot, ensure that QEMU Guest Agent software is installed on the VM. If this software is not installed, the risk of inconsistent data in the snapshot is greatly increased.
- If the VM is running a database or a highly loaded system, stop the VM before creating the snapshot. If stopping the VM is not possible, create a snapshot with the Allow saving RAM status option.