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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%...

No device shares the IOMMU group with the iGPU.

PVE: 8.0.4 (from neofetch) CPU: AMD Ryzen 9 7950X3D (32) @ 4.200GHz GPU: AMD ATI 0b:00.0 Raphael What I did: 1. Added quiet amd_iommu=on iommu=pt pcie_acs_override=downstream,multifunction to /etc/default/grub 2. Added these modules to /etc/modules vfio vfio_iommu_type1 vfio_pci...

Removing the IPv6 addresses did resolve the issue for real this time. Thanks Fabian for your great help!

How can I remove the IPv6 addresses from the certificates and the links? Do I just have to remove it from /etc/hosts and restart everyting?

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

Node pve-pycmc cat /etc/hosts ### Hetzner Online GmbH installimage 127.0.0.1 localhost.localdomain localhost xxx.xx.xx.169 pve-pycmc.pycmc.eu pve-pycmc xxx.xxx.xxx.146 AX41-1665271 ::1 ip6-localhost ip6-loopback fe00::0 ip6-localnet ff00::0 ip6-mcastprefix ff02::1 ip6-allnodes ff02::2...

Node AX41-1665271 cat /etc/hosts ### Hetzner Online GmbH installimage 127.0.0.1 localhost xxx.xx.xx.169 pve-pycmc.pycmc.eu pve-pycmc xxx.xxx.xxx.146 AX41-1665271 ::1 ip6-localhost ip6-loopback fe00::0 ip6-localnet ff00::0 ip6-mcastprefix ff02::1 ip6-allnodes ff02::2 ip6-allrouters ff02::3...

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

Node B message awaiting approval

Node B pveversion -v proxmox-ve: 8.0.1 (running kernel: 6.2.16-4-pve) pve-manager: 8.0.3 (running version: 8.0.3/bbf3993334bfa916) pve-kernel-6.2: 8.0.3 pve-kernel-5.15: 7.4-4 pve-kernel-6.2.16-4-pve: 6.2.16-5 pve-kernel-5.15.108-1-pve: 5.15.108-1 ceph-fuse: 17.2.6-pve1+3 corosync: 3.1.7-pve3...

Node A pveversion -v proxmox-ve: 8.0.1 (running kernel: 6.2.16-5-pve) pve-manager: 8.0.3 (running version: 8.0.3/bbf3993334bfa916) pve-kernel-6.2: 8.0.4 pve-kernel-5.15: 7.4-4 pve-kernel-6.2.16-5-pve: 6.2.16-6 pve-kernel-5.15.108-1-pve: 5.15.108-1 pve-kernel-5.15.104-1-pve: 5.15.104-2 ceph...

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...

Can you please explain to me what I have to do to make them resolve correctly, maybe I did a mistake. So what I did was that I added the servers hostnames and IP addresses in each others resolv.conf file, thats it.

Yes I use nginx proxy manager for my connections but I also tested it without the proxy manager and still get the timeout so its not the proxies fault

I also now got this error while trying to connect to a console on another node TASK ERROR: command '/usr/bin/termproxy 5900 --path /nodes/pve-pycmc --perm Sys.Console -- /usr/bin/ssh -e none -t IPV6-ADDRESS-HERE -- /bin/login -f root' failed: exit code 1

worker[10030]: PVE::APIServer::AnyEvent +1792: (eval): ACCEPT FH10 CONN1 worker[10030]: PVE::APIServer::AnyEvent +1792: (eval): Setting TLS to autostart worker[10030]: PVE::APIServer::AnyEvent +1834: client_do_disconnect: close connection AnyEvent::Handle=HASH(0x5594a46494d8) worker[10030]...

Ssh connections work without password The only thing I found from pveproxy is pveproxy [1146]: proxy detected vanished client connection

The hostnames of each node resolve to the nodes IP address in the /etc/hosts and I also can ping each node via their hostname I didn't find anything that looks like a pve-cluster error message of any kind in the logs of journalctl they also show the status of each node and container correctly