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Assuming this log comes from the host, I'd say you have a VM spamming dhcp requests, quickly draining the pool of available addresses, thus generating these messages. You should be able to identify the VM with the MAC and then see what's wrong with the network config.

What did you restore it from? Does the VM come up? Can you ssh into it?

Figured it out. I had to install a kernel package, which is usually not required in a container, but the installer checks for it. With # lxc-start -Fn 104 I could see the container booting to [ OK ] Reached target System Update. After some time it rebooted and failed to start with the...

You may want to post the commands you entered, as well. I'm currently stuck after dnf system-upgrade download --refresh --releasever=26 as I keep getting this: # dnf system-upgrade reboot Error: system is not ready for upgrade

As mentioned before, you can import qcow2 to zvol with qm importdisk. For export you can either just use the integrated backup functionality or, if you want to do it manually, dd the zvol's block device to your desired location.

You can overprovision ZFS pools with thin provisioning enabled. The pool has 4 GB but will happily give you a 32 GB zvol. So you can e.g. create 3 500 GB zvols in your 500 GB zpool and be fine, as long as all machines together use no more than 500 GB.

As Alex Williamson states in his blog, you need the card you want to pass through in a separate IOMMU group. So try putting the 670 back into the 16x slot (the card supports 16x, so I don't know why you tried that. The slowdown would be very noticeable.) If that puts it in its own group, great...

Check Alex Williamon's blog and the VFIO users list for hints on how to circumvent nvidia's mitigations.

Not necessarily. You can import the qcow2 directly into zvol. Unlike QCOW2, which grows as usage increases, RAW allocates the complete disk space upfront. So a 1TB virtual disk will result in a 1TB file. But if you use ZFS that's not actually relevant. The zpool will be managed by the host. The...

You want to: Make sure that VT-d is enabled in the UEFI and shows up in the OS. See here. Make sure that the card or the downloaded ROM support UEFI. TS has more than one ROM for your model and not all support UEFI. Make sure the card is bound to vfio-pci. You may need to blacklist the native...

I've just successfully logged in with a 61 character password. Are you sure that the local keyboard settings are correct? Does your password contain fancy unicode characters? Otherwise, standard linux password recovery should do the trick. Either reboot the machine and add init=/bin/bash to the...

You should be able to roll your own image, which has DHCP enabled by default. CentOS' standpoint on this is that they can't possibly guess a sane default for any and all network environments, so they just don't. You're the admin, you have the information to enable the NIC with correct config...

Yup, that'll explain the distorted sound :D I'm afraid DPC latency can be extremely hard to get under control because it is influenced by lots of factors. The VFIO mailing list might be a good place to get info, as they tend to be geared much more towards entertainment than the average proxmox...

Does the sound work as expected before hibernating? Does it work if you immediately wake the same machine back up after hibernating? What is the DPC latency when you experience this distortion? There are several free (as in beer) tools to measure this. Does the distortion get better or even...

Do you know if replication was already started? If it wasn't it should be safe to force deletion. If it was you need cleanup after forcing deletion.

Does it actually prevent the VM from starting? Because if it doesn't you could just ignore it.

Looks like your firewall is blocking outgoing DNS requests. So either talk to the network administrator, if you absolutely need to use external DNS. Or just use the local DNS.

Apple support knows how to add certs.

Can you query the local DNS server (assuming you have at least a local DNS cache available)? Is there a router or firewall on the network that might block outgoing DNS requests?

It's time to dig then ;) $ dig google.it ; <<>> DiG 9.10.3-P4-Debian <<>> google.it ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 9377 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0...