VM Error: vhost_vsock kernel module not loaded

Incus
1

I am struggling with VMs in Incus. The error message below indicates that I need kernel module vhost_vsock. I’m not sure how to add that kernel module.
I am running Debian built by Armbian for the Odroid HC4. Will I need to compile the kernel module myself since this is not a common platform?
Thanks in advance!

$ incus launch images:ubuntu/22.04 ubuntuVM --vm
Creating ubuntuVM
Error: Failed instance creation: Failed creating instance record: Instance type "virtual-machine" is not supported on this server: vhost_vsock kernel module not loaded

System info:

$ cat /etc/os-release 
PRETTY_NAME="Armbian 23.11.1 bookworm"
NAME="Debian GNU/Linux"
VERSION_ID="12"
VERSION="12 (bookworm)"
VERSION_CODENAME=bookworm
ID=debian
HOME_URL="https://www.armbian.com"
SUPPORT_URL="https://forum.armbian.com"
BUG_REPORT_URL="https://www.armbian.com/bugs"
ARMBIAN_PRETTY_NAME="Armbian 23.11.1 bookworm"

$ incus version
Client version: 0.4
Server version: 0.4

$ uname -a
Linux odroidhc4 6.1.63-current-meson64 #1 SMP PREEMPT Mon Nov 20 10:52:19 UTC 2023 aarch64 GNU/Linux

$ sudo kvm-ok
INFO: /dev/kvm exists
KVM acceleration can be used

$ lsmod | grep vsock

$ lsmod | grep vhost
2

Look for CONFIG_VHOST_VSOCK in your kernel configuration (usually in /boot).

3

I found CONFIG_VHOST_VSOCK in /boot/config-6.1.63-current-meson64. Initially, the entry was not set. I have modified the entry to read CONFIG_VHOST_VSOCK=m. I then rebooted.

Maybe I missed an obvious implication of your previous reply, but I still have the same error that says vhost_vsock kernel module is not loaded.

$ lsmod | grep vhost
$ incus launch images:ubuntu/22.04 ubuntuVM --vm
Creating ubuntuVM
Error: Failed instance creation: Failed creating instance record: Instance type "virtual-machine" is not supported on this server: vhost_vsock kernel module not loaded
$ lsmod | grep vhost
$ sudo modprobe vhost
$ lsmod | grep vhost
vhost                  53248  0
vhost_iotlb            16384  1 vhost
$ sudo modprobe vhost_vsock
modprobe: FATAL: Module vhost_vsock not found in directory /lib/modules/6.1.63-current-meson64
$ ls /lib/modules/6.1.63-current-meson64/kernel/drivers/
acpi  base   bluetooth  char       counter  cxl      dma     firmware  gpu  hv         i2c  input    mailbox  mfd   most  net   nvmem  perf     platform  ptp        reset  scsi  spmi     target       tty  usb    video   w1
ata   bcma   bus        clk        cpufreq  dax      edac    gnss      hid  hwmon      i3c  irqchip  md       misc  mtd   nfc   pci    phy      power     pwm        rpmsg  soc   ssb      thermal      ufs  vdpa   virt    watchdog
atm   block  cdrom      connector  crypto   devfreq  extcon  gpio      hsi  hwtracing  iio  leds     media    mmc   mux   nvme  peci   pinctrl  pps       regulator  rtc    spi   staging  thunderbolt  uio  vhost  virtio  xen
4

Okay, so that means that your Linux kernel was not compiled with that feature.
You’re going to need a different kernel which has it as =m or =y.

You can either build one yourself or just talk to whoever makes the kernel for your platform to have them enable this in their kernel configuration.

5

It’s working now! I rebuilt the Armbian image with VHOST_SOCK kernel module included. Thanks for your help.