Add VirtioVsock to guest

[m4rcs]

For one of my applications it would be very nice to use a VirtioVsock. (Link: hxxps://wiki.qemu.org/Features/VirtioVsock)

I tried adding

...
args: -device vhost-vsock-pci,guest-cid=3
...

to the <vmid>.conf file. But the machine would start because of:

Use of uninitialized value in split at /usr/share/perl5/PVE/QemuServer/Cloudinit.pm line 88.

Did someone get the VirtioVsock to work?

 

[wolfgang]

Hi,

I guess you are on an old version.

Please update your system.

 

[m4rcs]

I think I am on the latest version:

root@proxmox ~ # pveversion
pve-manager/5.2-10/6f892b40 (running kernel: 4.15.18-5-pve)

So this should be the problem.

 

[wolfgang]

Can you please send your VM Config.

 

[m4rcs]

108.conf

agent: 1,fstrim_cloned_disks=1
args: -device vhost-vsock-pci,guest-cid=5
boot: c
bootdisk: scsi0
ciuser: ms
ide2: vms:vm-108-cloudinit,media=cdrom
ipconfig0: ...
memory: 512
name: ...
net0: virtio=E2:7F:37:35:19:08,bridge=vmbr1
ostype: l26
scsi0: vms:vm-108-disk-0,size=4812M
scsihw: virtio-scsi-pci
serial0: socket
serial1: socket
smbios1: uuid=8b0bf5ed-4d98-4a3f-8299-ab2a13ab0332
sshkeys: ...
vmgenid: 9d70f70c-bef2-4a2c-b283-0b21b1b1df72

Error when starting:

Use of uninitialized value in split at /usr/share/perl5/PVE/QemuServer/Cloudinit.pm line 88.
Total translation table size: 0
Total rockridge attributes bytes: 417
Total directory bytes: 0
Path table size(bytes): 10
Max brk space used 0
178 extents written (0 MB)
kvm: -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3: PCI: slot 3 function 0 not available for virtio-balloon-pci, in use by vhost-vsock-pci
TASK ERROR: start failed: command '/usr/bin/kvm -id 108 -name ... -chardev 'socket,id=qmp,path=/var/run/qemu-server/108.qmp,server,nowait' -mon 'chardev=qmp,mode=control' -chardev 'socket,id=qmp-event,path=/var/run/qemu-server/108-event.qmp,server,nowait' -mon 'chardev=qmp-event,mode=control' -pidfile /var/run/qemu-server/108.pid -daemonize -smbios 'type=1,uuid=8b0bf5ed-4d98-4a3f-8299-ab2a13ab0332' -smp '1,sockets=1,cores=1,maxcpus=1' -nodefaults -boot 'menu=on,strict=on,reboot-timeout=1000,splash=/usr/share/qemu-server/bootsplash.jpg' -vga std -vnc unix:/var/run/qemu-server/108.vnc,x509,password -cpu kvm64,+lahf_lm,+sep,+kvm_pv_unhalt,+kvm_pv_eoi,enforce -m 512 -device 'vhost-vsock-pci,guest-cid=5' -device 'pci-bridge,id=pci.2,chassis_nr=2,bus=pci.0,addr=0x1f' -device 'pci-bridge,id=pci.1,chassis_nr=1,bus=pci.0,addr=0x1e' -device 'vmgenid,guid=9d70f70c-bef2-4a2c-b283-0b21b1b1df72' -device 'piix3-usb-uhci,id=uhci,bus=pci.0,addr=0x1.0x2' -device 'usb-tablet,id=tablet,bus=uhci.0,port=1' -chardev 'socket,id=serial0,path=/var/run/qemu-server/108.serial0,server,nowait' -device 'isa-serial,chardev=serial0' -chardev 'socket,id=serial1,path=/var/run/qemu-server/108.serial1,server,nowait' -device 'isa-serial,chardev=serial1' -chardev 'socket,path=/var/run/qemu-server/108.qga,server,nowait,id=qga0' -device 'virtio-serial,id=qga0,bus=pci.0,addr=0x8' -device 'virtserialport,chardev=qga0,name=org.qemu.guest_agent.0' -device 'virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3' -drive 'file=/dev/vg0/vm-108-cloudinit,if=none,id=drive-ide2,media=cdrom,aio=threads' -device 'ide-cd,bus=ide.1,unit=0,drive=drive-ide2,id=ide2' -device 'virtio-scsi-pci,id=scsihw0,bus=pci.0,addr=0x5' -drive 'file=/dev/vg0/vm-108-disk-0,if=none,id=drive-scsi0,format=raw,cache=none,aio=native,detect-zeroes=on' -device 'scsi-hd,bus=scsihw0.0,channel=0,scsi-id=0,lun=0,drive=drive-scsi0,id=scsi0,bootindex=100' -netdev 'type=tap,id=net0,ifname=tap108i0,script=/var/lib/qemu-server/pve-bridge,downscript=/var/lib/qemu-server/pve-bridgedown,vhost=on' -device 'virtio-net-pci,mac=E2:7F:37:35:19:08,netdev=net0,bus=pci.0,addr=0x12,id=net0'' fail

 

[m4rcs]

Figured it out. Had to remove the balloning device at memory.

 

[spirit]

you need to add a free pci slot address in your command line

args: -device vhost-vsock-pci,guest-cid=3,addr=0x..

see : /usr/share/perl5/PVE/QemuServer/PCI.pm

(0x4 should work fine)