Virtual Bridge "Network" for Sandbox

[Paul O'Rorke]

Thanks Laine,

I got another suggestion, off list, about using vxlans that I will also 
look into.

I would be more than happy to post what I eventually decide to use for 
production.

regards

*Paul O'Rorke*


On 2020-06-29 12:46 p.m., Laine Stump wrote:
> On 6/29/20 12:43 PM, Paul O'Rorke 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?
>
> Even a list of the steps you took to implement it manuall external to 
> libvirt would be useful. Maybe that would inspire someone else to add 
> support in libvirt virtual networks. We used to put stuff like that in 
> the wiki, but I think the preferred location has changed / is changing 
> and I'm not sure at the moment what the new norm is.
>
>>
>> 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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