Hi,
just answering the additional question, the rest may get better answered
by our community.
On 02/02/2017 10:22 AM, Uwe Sauter wrote:
Hi all,
I would like to hear recommendations regarding the network setup of a Proxmox
cluster. The situation is the following:
* Proxmox hosts have several ethernet links
* multiple VLANs are used in our datacenter
* I cannot guarantee that the VLANs are on the same interface for each host
(meaning VLAN 1234 could be on eth1 for host A but on
eth3 for host B, e.g. due to performance reasons)
* passing through a VLAN trunk to a VM currently doesn't seem to be necessary
My thought was that I would need to create a VLAN interface for each used VLAN
(say ethX.1234) and on top of that configure a
Linux bridge (vmbr1234). This should abstract away the physical network
situation from the VMs.
What kind of network setup would you recommend?
One additional question: does Proxmox stop me from migration a VM to a host
that doesn't provide VLANs necessary to that
particular VM? (e.g. a VM needs VLAN 1234 but some of the hosts aren't
connected to this VLAN)
Yes and no, you need the interface you use on Node A available on Node B,
else PVE cannot start the VM after the migration on the target node, as
the interface
does not exists anymore.
So if you create a vmbr1234 and let the VM use it then there needs to be
a vmbr1234
available on each needed migration target node.
But this can be just a "dummy" bridge, then the migration works but the
VM has no network
connection, as expected.
Additional note: When creating the dummy bridge with no physical
interface connect on which
you wantto start a VM with VLAN tag configured you just need to ensure
that the dummy bridge
allowsvlan_filtering ( in /etc/network/interface it would be the
"bridge_vlan_aware yes" option).
cheers,
Thomas
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