What is the proper way to provide networks without an egress of the host? In VMware i would take a portgroup and just not associate it with a vnic. In ovirt that doesnt seem possible as the network doesnt seem to function unless i move to a physical nic under the "Setup Host Networks" options. The Goal here is to provide a network for VMs to use on the single host only no traffic would need to leave the host but would need to have VLan IDs and segmentation through them on the host
On Tue, 29 Jan 2019 15:14:42 -0000 "Brian Wilson" <briwils2@cisco.com> wrote:
What is the proper way to provide networks without an egress of the host? In VMware i would take a portgroup and just not associate it with a vnic. In ovirt that doesnt seem possible as the network doesnt seem to function unless i move to a physical nic under the "Setup Host Networks" options.
The Goal here is to provide a network for VMs to use on the single host only no traffic would need to leave the host but would need to have VLan IDs and segmentation through them on the host
Maybe I do not get your scenario completely. Would a OVN nework per host solve your problem?
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OVN is the way to go but if you have a spare nic you can attach you it unplugged to a network with or without VLAN. Regards Paul S. ________________________________________ From: Dominik Holler <dholler@redhat.com> Sent: 29 January 2019 15:43 To: Brian Wilson Cc: users@ovirt.org Subject: [ovirt-users] Re: Host Only Network On Tue, 29 Jan 2019 15:14:42 -0000 "Brian Wilson" <briwils2@cisco.com> wrote:
What is the proper way to provide networks without an egress of the host? In VMware i would take a portgroup and just not associate it with a vnic. In ovirt that doesnt seem possible as the network doesnt seem to function unless i move to a physical nic under the "Setup Host Networks" options.
The Goal here is to provide a network for VMs to use on the single host only no traffic would need to leave the host but would need to have VLan IDs and segmentation through them on the host
Maybe I do not get your scenario completely. Would a OVN nework per host solve your problem?
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On Tue, 29 Jan 2019, 17:44 Dominik Holler <dholler@redhat.com wrote:
On Tue, 29 Jan 2019 15:14:42 -0000 "Brian Wilson" <briwils2@cisco.com> wrote:
What is the proper way to provide networks without an egress of the host? In VMware i would take a portgroup and just not associate it with a vnic. In ovirt that doesnt seem possible as the network doesnt seem to function unless i move to a physical nic under the "Setup Host Networks" options.
The Goal here is to provide a network for VMs to use on the single host only no traffic would need to leave the host but would need to have VLan IDs and segmentation through them on the host
Maybe I do not get your scenario completely. Would a OVN nework per host solve your problem?
OVN allows to create an isolated network that speads across the while cluster. If I understand correctly, Brian has more humble requirement, which users implement by creating a dummy0 device (note the lack of underscore in the name). The dummy device would she as a nic on the host, allows attaching a bridge to it, but lets no traffic leave the host. Regards, Dan.
Dan is correct and i have actully tested out both of these suggestions and the notes i have from them are: OVN Networks - These work well but seem to be limited in that they do not allow a VLAN ID to be tagged to them, seems the solution to that is to connect them to an external network which leads back to the same question of having to have that network be assigned to a nic. Attaching to a NIC thats down - This works but wont be a solution in a machine that may not have an extra nic, and was looking for something more portable, also seems that it stays down due to no carrier (makes sense), while the dummy interface will show itself as up. Dummy Network - This works and will be the way we implement it until we find a reason not to. This will allow us to use Bridge Networks still which will mimic setups we have that are actually connected to physical networks, as well VLAN IDs on them. Side note on this i actually had to use dummy_0 as the name and then restart the engine before it would show up in the Network Assignment Window for the hosts under "Setup Host Networks" Big thanks to you all on helping with this
participants (4)
-
Brian Wilson -
Dan Kenigsberg -
Dominik Holler -
Staniforth, Paul