[FredLUG] KVM and Virtual Network

[Brian Maddox]

I'll poke Ted about this.  I've had trouble before following online docs
about doing a bridged interface (I think the way Ted showed me worked and a
bunch of online docs were wrong).

>From experience I know KVM is faster processor-wise but a bit slower disk
access-wise.  Also discovered installing the KVM network/disk drivers in the
guest can sometimes destroy your system most completely ;)

On Thu, Jan 21, 2010 at 10:56 AM, Peter Larsen <ego.alter at gmail.com> wrote:

>  I know a few of you use/used Qemu/KVM; I'm trying to kick the VMware
> habbit here, but it's not turning out as easy as I thought it would be.
>
> Besides som minor issues with the storage that I finally figured out, I
> have great trouble with the network side. I simply want a bridged network so
> the VM uses the same DHCP server as the host does. However, the
> configuration for networking doesn't seem to be active in the very least.
>
> When using the "Virtual Network Editor" I get three networks defined:
> vmnet0 (bridged), vmnet1 (host-only) and vmnet8 (NAT). All very straight
> forward and fairly easy to figure out. However, none of them are active for
> VMs to use. Instead "brctl show" returns virbr0 which is enabled in a
> configuration else-where. So how to enable the kvm-defined networks?  When I
> try to assign network devices to a kvm, all I see is the NAT - everything
> else says the bridge is disabled. Since I don't even see the network names
> defined with kvm, I'm sure somekind of configuration points to the "wrong"
> place that ignores what the gui think is right - but where??
>
> Btw. the package qemu-kvm is empty on fedora 12??
>
> When we did KVM at our fredlug meeting back in October (I think it was)
> that was my biggest issue and actually never got resolved. So I wonder if
> the F12 implementation somehow lacks the setup to be used in the way I want,
> and I fear I may have to become a KVM master to just get a VM using a bridge
> :(  Please tell me that isn't the case; at least it's one of the reasons
> vmware may keep existing as the prime tool since this stuff simply just
> "works" out of the box (well, once you have figured out how to install it on
> the box that is - at least kvm/qemu is way easy there).
>
>   --
>
> Best Regards
>   Peter Larsen
>
> Wise words of the day:
> I've no idea when Linus is going to release 2.0.24, but if he takes
> too long Im going to release a 2.0.24unoff and he can sound off all
> he likes.
> 	-- Alan Cox
>
>
>   --
>
> Best Regards
>   Peter Larsen
>
> Wise words of the day:
> We are Pentium of Borg.  Division is futile.  You will be approximated.
> 	-- seen in someone's .signature
>
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-- 
"The fact that man knows right from wrong proves his intellectual
superiority to other creatures; but the fact that he can do wrong proves his
moral inferiority to any creature that cannot."
  - Mark Twain
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