Xen project Mailing List

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)?

--

Kind Regards
Rudi Ahlers
CEO, SoftDux

Web: http://www.SoftDux.com
Check out my technical blog, http://blog.softdux.com for Linux or other technical stuff, or visit http://www.WebHostingTalk.co.za for Web Hosting stuff

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Re: [Xen-users] unable to access Linux HVM via xm console - Couldnotread tty from store: No such file or directory