Introduction
In Hypervisor Version 1.XX the Virtual Machine Disk Format was based on Disk-Images in Qcow2 Format, these are easier to handle, but showed stability issues during runtime, which lead to Hypervisor crashes after a few days or week of productions.
Thus we decided to change the Virtual Disk Format to Disk Volumes, which is not only stable in production, but also offers better performance. On the other hand the handling of those disks is a bit more complex (backups, market and so on), as the volumes need to be exported to file based disk images and imported back as well.
Finally this means that the Updgrade from Version 1 to Version 2 requires to free up all the SSD VM Space in order to create a huge volume group, this means to destroy the VM storage partition. The upgrade path requires to:
- Update to the last 1.03 Version
- backup all existing VMs onto an external USB Backup Medium
- check if the backups work as expected
- install the Version 2 Hypervisor via the recovery stick
- reimport the VMs back to the Appliance