Yeah, I don't think you need to worry about it. Without the modprobe flag configured on the KVM host, it won't allow a nested VM to be deployed.
-Si On Fri, Feb 10, 2023 at 10:51 AM Gary Dixon <[email protected]> wrote: > > 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* <+44%207989717661>ms@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 <[email protected]> > Sent: 10 February 2023 16:23 > To: [email protected] > 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 > <[email protected]> > 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. > > >
