I highly recommend the Xen graphical management tools - Google virt-manager and virtinstall - these tools help out a lot in trying to get domUs installed and are able for a lot of them to choose PV or HVM depending on whether a modified kernel is available or not.
-Nick
>>> On Tue, Jun 17, 2008 at 9:39 AM, Rudi Ahlers <Rudi@xxxxxxxxxxx> wrote:
Nick Couchman wrote: > Yes, HVM - a hardware virtual machine - is the way to run unmodified > guest O/Ss on Xen. If your O/S has a modified kernel available, > though, you should use that. CentOS 5.1 definitely has a PV > (modified) kernel available, so is there some reason you want to run > your CentOS 5.1 domU in an HVM (unmodified), or maybe you should > switch over to the modified kernel for that domU? > > >>> On 2008/06/16 at 22:20, Rudi Ahlers <Rudi@xxxxxxxxxxx> wrote: > Nick Couchman wrote: > > HVM = fully virtualized. The question is, why are you using fully > > virtualized domUs? Why not paravirtualized (PV)? > > > > >>> On 2008/06/16 at 16:07, Rudi Ahlers <Rudi@xxxxxxxxxxx> wrote: > > Itamar - IspBrasil wrote: > > > why you're using hvm ? its slow > > > > > > > > > > > > Rudi Ahlers wrote: > > >> Hi all > > >> > > >> I'm running CentOS 5.1 x64 + Xen 3.0 & I have setup a CentOS 5.1 x64 > > >> domU as a HMV. For the setup I used VNC, but I would prefer to be > > >> able to access it via "xm console cPanel" via SSH directly. > > >> > > >> Here's the output cPanel HVM: > > >> > > >> [root@pc-00059 ~]# more /etc/xen/cPanel > > >> name = "cPanel" > > >> uuid = "ff940501-507d-04ca-e590-831e79ba0397" > > >> maxmem = 6144 > > >> memory = 6144 > > >> vcpus = 2 > > >> builder = "hvm" > > >> kernel = "/usr/lib/xen/boot/hvmloader" > > >> boot = "c" > > >> pae = 1 > > >> acpi = 0 > > >> apic = 0 > > >> >> > >> >> > >> >> > >> device_model = "/usr/lib64/xen/bin/qemu-dm" > > >> sdl = 0 > > >> vnc = 0 > > >> vncunused = 2 > > >> #disk = [ > > >> > > > "phy:/dev/data/cPanel,hda,w","file:/data/storage/CentOS-5.1-x86_64-bin-1of7.iso,ioemu:hdc:cdrom,r" > > > > > >> ] > > >> disk = [ "phy:/dev/data/cPanel,hda,w" ] > > >> vif = [ "mac=00:16:3e:4e:9b:48,bridge=xenbr0,type=ioemu" ] > > >> serial = "pty" > > >> usb = 1 > > >> usbdevice = 'tablet' > > >> > > >> > > >> When I try and connect to it via console, I get the following: > > >> [root@pc-00059 ~]# xm console cPanel > > >> xenconsole: Could not read tty from store: No such file or directory > > >> [root@pc-00059 ~]# > > >> > > >> > > >> > > >> Reading through all the email archives, I found a few similar > > >> problems, but the suggested fixes doesn't help. Does anyone know how > > >> to get xm console to work for HVM type domU's ? > > >> > > >> > > > > > > > > > > > mmm, now that I think of it. I setup fully virtualized hosts, not HVM - > > my bad..... > > > > -- > > > > ok, so I had the right words :) > > as far as I understand, HVM is the only way to get Windows, or rather > unmodified OS', installed onto Linux, right? Or is there another way? I > setup Windows like this, and simply copied the Windows HMV > (/etc/xen/windows2003) to a new one for Linux (/etc/xen/cPanel) and > installed Linux onto it. > > Should I rather have used a non-virtualized (is this referred to as > paravirtualized ?) installation? But would I then be able to install say > Ubuntu onto CentOS as a PV? Doesn't Ubuntu use a different kernel than > the Red Hat family (Red Hat, Fedora Core, CentOS)? > > -- > No, no reason why I want to run CentOS unmodified. It was just easy to setup :) I copied the one HVM config file to a new one and it was up. So I guess I'll setup a new paravirtualized centos then :)
--
Kind Regards Rudi Ahlers CEO, SoftDux
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