Hi Simon Thanks for the info - its quite interesting !!
We are running KVM hypervisor on Ubuntu 20.04 on AMD EPYC cpu's We haven't been enabling HVM on templates as we don't want users to be able to nest hypervisors within their VM's Gary Dixon Senior Technical Consultant T: +44 161 537 4990 E: v...@quadris-support.com W: www.quadris.co.uk The information contained in this e-mail from Quadris may be confidential and privileged for the private use of the named recipient. The contents of this e-mail may not necessarily represent the official views of Quadris. If you have received this information in error you must not copy, distribute or take any action or reliance on its contents. Please destroy any hard copies and delete this message. -----Original Message----- From: Simon Weller <siwelle...@gmail.com> Sent: 10 February 2023 16:23 To: users@cloudstack.apache.org Subject: Re: noob question about Templates Hey Gary, Welcome to the list. Firstly, which hypervisor are you using? HVM used to mean use hardware accelerated virtualization back in the day when it was still fairly new. It was required for some hypervisors, but not all. These days everything is hardware accelerated. If you are running KVM, you can enable the ability to run nested virilization by doing this - Intel - modprobe -r kvm_intel modprobe kvm_intel nested=1 Make it permanent by adding the following line to /etc/modprobe.d/kvm.conf: options kvm_intel nested=1 AMD - modprobe -r kvm_amd modprobe kvm_amd nested=1 Make it permanent by adding the following line to /etc/modprobe.d/kvm.conf: options kvm_amd nested=1 Please note that CloudStack will not manage any nested virtualization unless Cloudstack itself is nested (e.g. a lab environment). -Si On Fri, Feb 10, 2023 at 8:28 AM Gary Dixon <gary.di...@quadris.co.uk.invalid> wrote: > HI > > > > Sorry for the newbie question but ….. > > > > When creating a template – does enabling the HVM option allow the > virtual machine to also be a hypervisor so that nested virtualization > can be achieved? > Gary Dixon > Senior Technical Consultant > T: +44 161 537 4990 > E: *v* <+44%207989717661>ms@quadris‑support.com > W: > https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.q > uadris.co.uk%2F&data=05%7C01%7CGary.Dixon%40quadris.co.uk%7C425ae13b53 > 394cabd18808db0b831363%7Cf1d6abf3d3b44894ae16db0fb93a96a2%7C0%7C0%7C63 > 8116429828439052%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV > 2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=2GprAUWMFJ > cOjv2PGTIr6gZdnFIDOFAZQd61NGvMGBc%3D&reserved=0 > The information contained in this e-mail from Quadris may be > confidential and privileged for the private use of the named > recipient. The contents of this e-mail may not necessarily represent the > official views of Quadris. > If you have received this information in error you must not copy, > distribute or take any action or reliance on its contents. Please > destroy any hard copies and delete this message. >
