Virtual Bridge "Network" for Sandbox
Paul O'Rorke
paul at tracker-software.com
Mon Jun 29 20:38:14 UTC 2020
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 <paul at tracker-software.com
> <mailto:paul at 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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