To followup the original thread for wiki documentation for this I added a page to the wiki: https://cwiki.apache.org/confluence/display/CLOUDSTACK/XenServer+Hypervisor+for+CloudStack+Development+using+Fusion
and added a link to it here: https://cwiki.apache.org/confluence/display/CLOUDSTACK/DevCloud -Soheil ________________________________________ From: Kelcey Damage (BT) [kel...@backbonetechnology.com] Sent: Thursday, May 02, 2013 2:49 PM To: dev@cloudstack.apache.org Subject: RE: Dev/Test Environment Sounds good! >-----Original Message----- >From: Marcus Sorensen [mailto:shadow...@gmail.com] >Sent: Thursday, May 02, 2013 2:47 PM >To: dev@cloudstack.apache.org >Subject: Re: Dev/Test Environment > >It is confusing, for sure. As far as I understand, virtio is more or less >paravirtualization (guest OS modification to talk to the host and provide device >emulation via API), but requires the host hardware to have support (VT-x or >what have you) in order to function. I'm not clear on those details as to why. >The Xen kernel apparently doesn't, and I assumed it was then just falling back >to full virtualization, but perhaps not. > >I'll be at Hosting Con at the end of June, and may not be able to swing the >cloudstack conference, but I'll take you up on that the next chance I get. > > >On Thu, May 2, 2013 at 3:38 PM, Kelcey Damage (BT) < >kel...@backbonetechnology.com> wrote: > >> Lol, >> >> We are just using different terms, haha. I call Hardware assisted >> virtualization HAV, and separate it from paravirtualization(software >> wrapper). That's where the confusion is. I agree with what you're >> saying, Just not used to people referring to tier 2 HAV as >> paravirtualization support. >> >> I build my dev cloud with full KVM_intel for the nested HV on workstation. >> >> But I am not using just vmx, I am also using pDMA/vt-x2/d so there is >> more funky passthrough happening including pci control/north-bridge. >> >> On the other hand you did get me to re-read the paravirt wiki :). >> >> If I see you at CCC I'll buy you a beer! >> >> -kelcey >> >> >> >-----Original Message----- >> >From: Marcus Sorensen [mailto:shadow...@gmail.com] >> >Sent: Thursday, May 02, 2013 2:32 PM >> >To: dev@cloudstack.apache.org >> >Subject: Re: Dev/Test Environment >> > >> >Libvirt is just a wrapper that controls the hypervisor. With KVM >> >hosts, >> we >> look >> >for the kvm_intel or kvm_amd modules, signifying that there's >> >hardware support for paravirtualization. We don't see it in >> >virtualbox, because it >> doesn't >> >support nested paravirtualization (It's the vmx flag that you see in >> >/proc/cpuinfo, missing in virtualbox guests but not in fusion or KVM >> guests). >> >KVM and fusion do support it, hence we can run devcloud there. >> > >> >Xen devcloud doesn't require the vmx flag to be present on the cpu, >> >so we >> can >> >run it in virtualbox. >> > >> > >> >On Thu, May 2, 2013 at 2:41 PM, kel...@backbonetechnology.com < >> >kel...@backbonetechnology.com> wrote: >> > >> >> Hate to be that guy, but it's the other way around.. Xen does >> >> provide paravirtualization, KVM does not, but libvirt does with Qemu. >> >> >> >> Virtualbox is PV only not HAV >> >> >> >> http://en.m.wikipedia.org/wiki/Paravirtualization >> >> >> >> :) >> >> >> >> Sent from my HTC >> >> >> >> ----- Reply message ----- >> >> From: "Marcus Sorensen" <shadow...@gmail.com> >> >> To: "dev@cloudstack.apache.org" <dev@cloudstack.apache.org> >> >> Subject: Dev/Test Environment >> >> Date: Thu, May 2, 2013 1:22 PM >> >> >> >> Virtualbox doesn't support nested virtualization (unless they just >> >> barely added it), which is why we have to use fusion (or KVM if you >> >> run linux) for the KVM version of devcloud. Vbox works for the Xen >> >> devcloud though because it doesn't require the Xen guests to have >> >> paravirtualization, whereas cloudstack KVM guests do. >> >> >> >> >> >> On Thu, May 2, 2013 at 2:17 PM, Joe Brockmeier <j...@zonker.net> >wrote: >> >> >> >> > On Thu, May 2, 2013, at 03:16 PM, Joe Brockmeier wrote: >> >> > > On Thu, May 2, 2013, at 01:44 PM, Soheil Eizadi wrote: >> >> > > > The wiki is organized around VirtualBox, assuming it works, I >> >> > > > think >> >> it >> >> > is >> >> > > > a better choice than Fusion since it free and easy to setup. >> >> > > > I don't >> >> > have >> >> > > > much experience with VirtualBox, does it not support nested >> >> > hypervisors? >> >> > > >> >> > > If you've gotten something working in Fusion, it would be worth >> >> > > putting that on the wiki for folks who aren't a fan of VirtualBox. >> >> > > (Or folks >> >> who >> >> > > already use Fusion and don't want to run two desktop virt. >> >> > > products...) >> >> > >> >> > Didn't complete my thought - would be worth putting on the wiki >> >> > *on a new page* so that it's not conflicting with the "standard" >> >> > DevCloud info. >> >> > >> >> > Best, >> >> > >> >> > jzb >> >> > -- >> >> > Joe Brockmeier >> >> > j...@zonker.net >> >> > Twitter: @jzb >> >> > http://www.dissociatedpress.net/ >> >> > >> >> >> >>
