Setup & operation
Can I run nested virtualisation on a VPS?
Short answer
Yes. Nested virtualisation is enabled on every OnionVPS instance, so you can run KVM guests inside your instance, install Proxmox VE, or run Docker-in-Docker and VM-based CI jobs. Many providers disable it, which is the usual reason Proxmox and certain CI configurations fail elsewhere.
Nested guests carry a further performance penalty on top of the first layer — expect noticeably slower IO in particular. It is excellent for labs, testing and CI, and a poor choice for production workloads that could run at the first level.
Check with grep -E "vmx|svm" /proc/cpuinfo on your instance; if the flag is present, nesting is available.
See also: Nested virtualisation · KVM
7 answers in Setup & operation
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