[Users] How to add internal networks

[Lior Vernia]

Hello Frank,

I suspect the problem is that VDSM isn't told by default to pass dummy
NICs on to the engine. Have a look at the following file (exact path
might vary):

/usr/lib64/python2.7/site-packages/vdsm/config.py

Search for a variable called "fake_nics", it should exist for 3.2. By
default it is empty, but you may define a pattern for fake NIC names to
be passed to the engine (in your case probably "dummy*"). Restart the
vdsm daemon and everything should be fine. Maybe you'll have to move the
host to maintenance and then reactivate just to refresh the UI.

Please let us know if that works.

Yours, Lior.

On 16/05/13 15:48, Frank Wall wrote:
> Hi Asaf,
> 
> Am 13.05.2013 15:05, schrieb Assaf Muller:
>> Without the ability to control the networking devices in your
>> vicinity and setup VLANs, what you're trying to do isn't supported via
>> oVirt.
> 
> I was already guessing that it is not supported. Thanks for the
> "official" confirmation.
> 
>> * Create two dummy interfaces on the host, and give them static IP
>> addresses. For example: 192.168.1.254/24, and 192.168.2.254/24.
> 
> OK, I've populated the required files...
> 
> /etc/modules-load.d/dummy.conf
> /etc/modprobe.d/dummy.conf
> /etc/sysconfig/network-scripts/ifcfg-dummy0
> 
> ...and after a reboot I have a new dummy NIC configured:
> 
> dummy0: flags=195<UP,BROADCAST,RUNNING,NOARP>  mtu 1500
>         inet 192.168.0.254  netmask 255.255.255.0  broadcast 192.168.0.255
>         ether 5e:61:0f:e7:f9:bc  txqueuelen 0  (Ethernet)
>         RX packets 0  bytes 0 (0.0 B)
>         RX errors 0  dropped 0  overruns 0  frame 0
>         TX packets 3  bytes 210 (210.0 B)
>         TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
> 
>> * Create two networks (VM) called One and Two and attach them to
>> the dummy NICs.
> 
> Unfortunately, this does not work as described. I was able to create
> the new VM network from the Admin Portal successfully, but I am unable
> to attach this network to the dummy NIC.
> 
> When I choose the "Setup Host Networks" option from the Admin Portal:
> My Datacenter => My Cluster => Hosts => My Host => TAB: Network
> Interfaces -> Setup Host Networks
> The dummy NIC is NOT listed, but only the physical NIC (with ovirtmgmt
> attached to it).
> 
> Is this expected? Does oVirt suppress any non-physical NICs?
> Is there another way to attach the VM network to my dummy NIC?
> 
> 
> 
> Thanks
> - Frank
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