no networking on vm's

[bbartelds]

Hi all - I have ran out of options, so hope I'm just overlooking something stupid. I have a proxmox cluster set up, consisting of three nodes - intel nuc's with a single Gb ethernet port.
All three nodes have the same issue: vm's I create on them seem to not receive any networking config. This used to work, but something changed apparently and now both the already existing vm's and newly created vm's are without functioning networking.

The proxmox node received an ip address just fine, and has no problems talking to other parts of the network.
I'm running proxmox 7.4-17.

networking configuration of prox node via gui


content of /etc/network/interfaces - prox node


ip a - prox node



But any vm on the prox node receives no networking configuration at all. And since it doesn't have any networking settings, I can't interface with it at all - outside of the proxmox gui.

ip a - on a vm (ubuntu, that wants to become pihole)



Does anyone see what I am missing?

 

[Folke]

Hi,
your Proxmox servers have statically assigned IP's, which you can see in the configuration that you posted (/etc/network/interfaces).
Your VMs in contrast seem to be configured to use DHCP.
To narrow down the problem, I would start by assigning a VM a static IP and see if it that changes things. To test, best ping an IP, with a lack of DHCP, DNS might be unconfigured.