1:21 p.m.
On Fri, Sep 16, 2016 at 1:32 PM, Nicolas Ecarnot <nicolas(a)ecarnot.net>
wrote:
Le 15/09/2016 à 23:27, Edward Haas a écrit :
On Thu, Sep 15, 2016 at 3:43 PM, Nicolas Ecarnot <nicolas(a)ecarnot.net>
wrote:
> Hello,
>
> I'm trying to setup a nested oVirt for the first time, and according to
> what I read around and experience, some special network settings have to be
> chosen.
>
> For this first try, the bare-metal host is a Debian, running KVM, and the
> virtual NICs are setup as macvtap in VEPA mode.
>
On what device you attached it? Bridge? the physical nic?
On my physical host, ifconfig is showing the following devices :
- lo, obviously
- eth0, primary used
- wlan0, not used, WIFI...
- virbr0
- virbr0-nic
The last two devices were created when installing and playing with the KVM
Virtual Machine Manager.
When trying to assign one of them to a VM, the only choices are :
- NAT
- eth0: macvtap
- wlan0: macvtap
- custom
and the source mode can be chosen between :
- Bridge
- VEPA
- Private
- Passthrough
My main goal is simplicity, and I'd rather use simple bridging, no NAT,
simple.
What would be the simplest choice?
With Virtual Machine Manager you can edit-connection details and create
bridges on the host that you can connect to.
I usually use an isolated network, that does not connect to the outside
world and is limited to the host. If I need it to access the outside world,
I can either connect one of the nics to the bridge created on the host or
just create another vnic that uses nat/macvtap.
Note that VMM is mainly focused on simple VM connectivity, using it for
nested virtualization is not simple and will require from you additional
effort.
> I'm not up to date with macvtap, but I think I understood that one of its
> limit was that no packet could be exchanged between the host and the
> guests. So far, this is leading me to access my own local VMs from another
> host. Too bad.
>
I'm also witnessing frequent loss of packets.
>
> So far, I'm also seeing that guests can not ping each others, so I'm not
> going further before having solved these basic issues.
>
By definition: http://virt.kernelnewbies.org/MacVTap
>
I'm remembering the good old times of lots of bridges where my VMs could
> be reached by anyone (this was desired), but virt manager is not offering
> me this choice. I also would like to avoid NAT for other reasons.
>
> To you all (4) people who are playing with nested oVirt :
> - which is your preferred bare metal OS?
> - which is your preferred guest (first virt level) OS?
> - which network setups and modes are working best?
>
> Thank you.
>
> --
> Nicolas ECARNOT
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>
--
Nicolas ECARNOT
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