Hi Peter,

I had not anticipated this much response.  I do have VLANs on my switch(s).  We are a modest operation and I configure without the use of any config tool as such.

I would love to see your configuration, even if for Puppet, I expect it will be informative/helpful!

Thanks for the offer.

*Paul O'Rorke*/ <http://www.tracker-software.com/downloads/>




On 2020-06-29 1:01 p.m., Peter Crowther wrote:
Paul, if you can set up a VLAN on your network infrastructure between the two hosts, I'll share the recipe I use with Open VSwitch.  We trunk a VLAN between our hosts for sandboxed guests, setting up a OVS bridge on each host that handles guests but also has a connection onto the VLAN.  Are you using any configuration tool?  I've got this in Puppet but should be able to convert to a shell script.

Cheers,

- Peter

On Mon, 29 Jun 2020 at 17:45, Paul O'Rorke <p...@tracker-software.com <mailto:p...@tracker-software.com>> wrote:

    Thanks Laine,

    I will take a look at Open vSwitch, it looks interesting.

    I am a generalist, I need to know enough about a lot of things to
    get many different tasks done, but do not have the in depth
    knowledge required to "patch" anything.  If I manage to wrangle a
    working solution should I post it?

    Needless to say I would be supportive of said feature being
    implemented by those more competent than I...

    Jocularity aside, thanks for the heads up on Open vSwitch.

    *Paul O'Rorke*


    On 2020-06-29 9:13 a.m., Laine Stump wrote:
    On 6/29/20 11:01 AM, Paul O'Rorke wrote:
    Hi all,

    I couldn't find any documentation on this, hopefully someone can
    point me in the right direction.

    I recently set up a sand-boxed environment for our developers.
    There are domain controller(s), workstations and servers in
    there.  The whole thing is running on a single host using a
    "Virtual Network" defined in virt-manager on that host.

    Now I find I want to add more guests and there are not enough
    resources on this one host.  Can I somehow make this Virtual
    Network available to two hosts?  I do not want to move to a
    bridged network and have to physically join the two hosts with a
    discrete link when they are already on the same subnet at the
    host level.

    Is that possible?

    You might be able to this using OpenvSwitch (iow "probably can,
    but I don't know the details" :-)) but libvirt doesn't have
    anything to set it up for you; you would need to create and
    configure the OVS switch outside of libvirt, then attach the
    libvirt guests to that switch (using "<interface type='bridge'>
    ... <virtualport type='openvswitch'> ...")

    I've idly thought about having this as a libvirt feature over the
    years, but as I never have that many guests, it was never a
    personal priority, and it wasn't immediately clear what was the
    best way to handle, e.g. DHCP, and routing to the outside.
    Definitely "patches are welcome" though :-)

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