If you only have the iGPU in your server, proxmox also uses this GPU to display the terminal when you attach a monitor to your server. Now if you allocate that iGPU to your VM, it interferes with the proxmox server itself and therefore it crashes.
Thats what I believe is happening. I can't 100%...
When I curl node A on node B via IPv6 (curl -6 'https://[xxxx:xxx:261:4fe2::2]:8006') nothing will happen
I also tried telnet -6 xxxx:xxx:261:4fe2::2%enp8s0 8006
Server lookup failure: xxxx:xxx:261:4fe2::2%enp8s0:8006, Name or service not known
Same thing with node B to A
Could the problem be my IPv6 address? Because when I tried to connect to node B's console via node A's WebGUI it told me that it couldn't connect to port 22 and showed the IPv6 address of the server...
Edit: Image
That fixed my issue... I don't know how I didn't see that, thank you so much!
Edit: Never mind, it didn't, I have the same problem again
So after I restart the nodes it works for 5 minutes but then it doesn't again
could it be that my certificate on every node only has the hostname of node A and the IPv6 address of node A in it?
I don't know anything about certificates so I can't tell...