vms randomly wont start

[darchon]

i have a windows 11 vm and pbs vm and they will randomly not start with this error:

WARN: iothread is only valid with virtio disk or virtio-scsi-single controller, ignoring
kvm: -netdev type=tap,id=net0,ifname=tap101i0,script=/usr/libexec/qemu-server/pve-bridge,downscript=/usr/libexec/qemu-server/pve-bridgedown,vhost=on: network script /usr/libexec/qemu-server/pve-bridge failed with status 11
TASK ERROR: start failed: QEMU exited with code 1

but if i retry a couple of times, they will inevitably start up.

anyone have any ideas why this is happening?

 

[dakralex]

Hi!

The first warning indicates that the iothread option is set on a disk that is not a virtio disk or a virtio-scsi-single controller.

The error which causes the VMs fail to start is the second error about the bridge not being set up correctly. Does the syslog indicate whether the network interface used for the VMs is flaky (i.e., it might be that the interface is down when the VM will not start)? Usually the syslog contains messages about the network interfaces switching to being up or down.