Re: [fedora-virt] how to active XEN on Fedora 12

[Dario Lesca]

Il giorno mer, 23/12/2009 alle 05.03 -0800, Boris Derzhavets ha scritto:
> You can use F12's KVM, but once again Libvirt will be required to
> manage VMs.
> F12 is a bleeding edge system for development, high performance
> virtualization 
> environment. You might not need it at all.
> So,  VMware might be the best option for you.

Thanks Boris, I use F12 on my Laptop and I want run some VM for test new
version of distro.

Now I use qemu-kvm but each machine use 30/40% of CPU of host system.

I want use XEN to see if it works better...

I have found this note:
http://www.cyberciti.biz/tips/rhel-centos-xen-virtualization-installation-ho...

But if I run "yum install xen virt-manager kernel-xen" this is the
output:
> % sudo LANG=C yum install xen virt-manager kernel-xen
> Loaded plugins: fastestmirror, presto, refresh-packagekit
> Loading mirror speeds from cached hostfile
> fedora: ftp.uni-bayreuth.de
> livna: ftp-stud.fht-esslingen.de
> rpmfusion-free: ftp.nb.lug.ro
> rpmfusion-free-updates: ftp.nb.lug.ro
> rpmfusion-nonfree: ftp.nb.lug.ro
> rpmfusion-nonfree-updates: ftp.nb.lug.ro
> updates: ftp.upjs.sk
>
> Setting up Install Process
> Package xen-3.4.1-5.fc12.x86_64 already installed and latest version
> Package virt-manager-0.8.0-7.fc12.noarch already installed and latest version
> Package kernel-2.6.31.6-166.fc12.x86_64 already installed and latest version
> Nothing to do

then I'm looking for some thing to do after this....

Thanks

[fedora-virt] how to active XEN on Fedora 12

[Dan Burkland]

Xen uses a special kernel so as far as I know you will first have to remove the default one with "yum remove kernel". Then try the " yum install xen virt-manager kernel-xen" command and it should work.

Regards,

Dan
> -----Original Message-----
> From: [e-mail] [mailto:fedora-list-
> [e-mail]] On Behalf Of Dario Lesca
> Sent: Wednesday, December 23, 2009 7:24 AM
> To: Boris Derzhavets
> Cc: Fedora Virt; Fedora Project List
> Subject: Re: [fedora-virt] how to active XEN on Fedora 12
>
> Il giorno mer, 23/12/2009 alle 05.03 -0800, Boris Derzhavets ha scritto:
> > You can use F12's KVM, but once again Libvirt will be required to
> > manage VMs.
> > F12 is a bleeding edge system for development, high performance
> > virtualization
> > environment. You might not need it at all.
> > So,  VMware might be the best option for you.
>
> Thanks Boris, I use F12 on my Laptop and I want run some VM for test new
> version of distro.
>
> Now I use qemu-kvm but each machine use 30/40% of CPU of host system.
>
> I want use XEN to see if it works better...
>
> I have found this note:
> http://www.cyberciti.biz/tips/rhel-centos-xen-virtualization-installation-
> howto.html
>
> But if I run "yum install xen virt-manager kernel-xen" this is the
> output:
> > % sudo LANG=C yum install xen virt-manager kernel-xen
> > Loaded plugins: fastestmirror, presto, refresh-packagekit
> > Loading mirror speeds from cached hostfile
> > fedora: ftp.uni-bayreuth.de
> > livna: ftp-stud.fht-esslingen.de
> > rpmfusion-free: ftp.nb.lug.ro
> > rpmfusion-free-updates: ftp.nb.lug.ro
> > rpmfusion-nonfree: ftp.nb.lug.ro
> > rpmfusion-nonfree-updates: ftp.nb.lug.ro
> > updates: ftp.upjs.sk
> >
> > Setting up Install Process
> > Package xen-3.4.1-5.fc12.x86_64 already installed and latest version
> > Package virt-manager-0.8.0-7.fc12.noarch already installed and latest
>
> version
> > Package kernel-2.6.31.6-166.fc12.x86_64 already installed and latest
>
> version
> > Nothing to do
>
> then I'm looking for some thing to do after this....
>
> Thanks
>
> --
> Dario Lesca
>
> --
> fedora-list mailing list
> [e-mail]
> To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list
> Guidelines:
> http://fedoraproject.org/wiki/Communicate/MailingListGuidelines

[fedora-virt] how to active XEN on Fedora 12

[Dario Lesca]

Il giorno mer, 23/12/2009 alle 08.20 -0600, Dan Burkland ha scritto:
> Xen uses a special kernel so as far as I know you will first have to
> remove the default one with "yum remove kernel". Then try the " yum
> install xen virt-manager kernel-xen" command and it should work.

On F12 the package kernel-xen not exist.
> [root@lesca ~]# LANG=C yum info  kernel-xen
> Loaded plugins: fastestmirror, presto, refresh-packagekit
> Loading mirror speeds from cached hostfile
> fedora: ftp.uni-bayreuth.de
> livna: ftp-stud.fht-esslingen.de
> rpmfusion-free: ftp.nb.lug.ro
> rpmfusion-free-updates: ftp.nb.lug.ro
> rpmfusion-nonfree: ftp.nb.lug.ro
> rpmfusion-nonfree-updates: ftp.nb.lug.ro
> updates: ftp.upjs.sk
>
> Error: No matching Packages to list

and I think it's not possible remove a working kernel.

Then Fedora12 not have a XEN kernel?
I must build one?

Thanks

[fedora-virt] how to active XEN on Fedora 12

[Richard W.M. Jones]

On Wed, Dec 23, 2009 at 02:23:37PM +0100, Dario Lesca wrote:
> Thanks Boris, I use F12 on my Laptop and I want run some VM for test new
> version of distro.

KVM is generally better for laptops because of better power
management.  However ...
> Now I use qemu-kvm but each machine use 30/40% of CPU of host system.

Is KVM enabled?

$ /sbin/lsmod | grep kvm
  kvm_intel              48184  6 
  kvm                   163952  1 kvm_intel

You should see a kvm_* module.  Does your laptop support hardware
virtualization?  Recent hardware has much better support than the
first generation of hardware.  Is it enabled in the laptop BIOS?
> I want use XEN to see if it works better...

[...]
> then I'm looking for some thing to do after this....

Basically Fedora 12 doesn't support Xen as a host.  Too bad, but this
is because upstream Xen people didn't get their changes into the Linux
kernel yet.

Your options are to go back to something out of date and unsupported
(Fedora 8 IIRC was the last version of Fedora that could be used as a
Xen host).  Or use KVM -- see above.  Or use RHEL 5 or a derivative
where an older version of Xen is fully supported.

Rich.

[fedora-virt] how to active XEN on Fedora 12

[Pasi Kärkkäinen]

On Wed, Dec 30, 2009 at 12:21:56PM +0000, Richard W.M. Jones wrote:
> On Wed, Dec 23, 2009 at 02:23:37PM +0100, Dario Lesca wrote:
> > Thanks Boris, I use F12 on my Laptop and I want run some VM for test new
> > version of distro.
>
> KVM is generally better for laptops because of better power
> management.  However ...
> > Now I use qemu-kvm but each machine use 30/40% of CPU of host system.
>
> Is KVM enabled?
>
> $ /sbin/lsmod | grep kvm
>   kvm_intel              48184  6 
>   kvm                   163952  1 kvm_intel
>
> You should see a kvm_* module.  Does your laptop support hardware
> virtualization?  Recent hardware has much better support than the
> first generation of hardware.  Is it enabled in the laptop BIOS?
> > I want use XEN to see if it works better...
>
> [...]
> > then I'm looking for some thing to do after this....
>
> Basically Fedora 12 doesn't support Xen as a host.  Too bad, but this
> is because upstream Xen people didn't get their changes into the Linux
> kernel yet.
>
> Your options are to go back to something out of date and unsupported
> (Fedora 8 IIRC was the last version of Fedora that could be used as a
> Xen host).  Or use KVM -- see above.  Or use RHEL 5 or a derivative
> where an older version of Xen is fully supported.

Fedora 12 contains Xen hypervisor and tools, only dom0 kernel is
missing.

There's a repository of xendom0 kernels as rpms, if you're willing to
install 3rdparty/testing rpms, see:

http://fedoraproject.org/wiki/Features/XenPvopsDom0

-- Pasi