You can now mount an ISO to a Cloud VPS from the panel and boot the machine from it. The catalogue covers recovery and imaging tools, firewall and router appliances and NAS systems — VyOS, pfSense, TrueNAS and Clonezilla among them — so you can handle rescue work, migrations or an operating system that is not one of our images.
If what you need is not there, ask for it from the same tab and support will look at adding it.
Mount one under the ISOs tab of any instance in your panel: