vhost-net requested but could not be initialized

[Florent]

Hi all,

On a test cluster, I can't start VM after migrating them on RBD :

kvm: -netdev  type=tap,id=net0,ifname=tap139i0,script=/var/lib/qemu-server/pve-bridge,vhost=on:  vhost-net requested but could not be initialized
kvm: -netdev  type=tap,id=net0,ifname=tap139i0,script=/var/lib/qemu-server/pve-bridge,vhost=on:  Device 'tap' could not be initialized
TASK ERROR: start failed:  command '/usr/bin/kvm -id 139 -chardev  'socket,id=qmp,path=/var/run/qemu-server/139.qmp,server,nowait' -mon  'chardev=qmp,mode=control' -vnc  unix:/var/run/qemu-server/139.vnc,x509,password -pidfile  /var/run/qemu-server/139.pid -daemonize -name  mariadb-drupal-merge.dev.limawi.ch -smp 'sockets=1,cores=1' -nodefaults  -boot 'menu=on' -vga cirrus -cpu kvm64,+lahf_lm,+x2apic,+sep -k fr -m  1024 -device 'piix3-usb-uhci,id=uhci,bus=pci.0,addr=0x1.0x2' -device  'usb-tablet,id=tablet,bus=uhci.0,port=1' -device  'virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3' -drive  'if=none,id=drive-ide2,media=cdrom,aio=native' -device  'ide-cd,bus=ide.1,unit=0,drive=drive-ide2,id=ide2,bootindex=200' -drive  'file=rbd:pve01-rbd01/vm-139-disk-1:mon_host=192.168.0.200 192.168.0.202   192.168.0.203:id=pvenodes:auth_supported=cephx:keyring=/etc/pve/priv/ceph/PVE01-RBD01.keyring,if=none,id=drive-virtio0,cache=writeback,aio=native'  -device  'virtio-blk-pci,drive=drive-virtio0,id=virtio0,bus=pci.0,addr=0xa,bootindex=100'  -netdev  'type=tap,id=net0,ifname=tap139i0,script=/var/lib/qemu-server/pve-bridge,vhost=on'  -device  'virtio-net-pci,mac=16:4D:1B:BB:3A:A5,netdev=net0,bus=pci.0,addr=0x12,id=net0,bootindex=300''  failed: exit code 1

On a node, VM cannot start (never), on another node VM starts after a few retries (4-5 tries then starts)...

What could be the problem ?

All nodes are on 3.10 pve kernel, up to date 3.2 pve, ceph firefly.

Thank you

 

[tom]

also post your VM config:

> qm config VMID

 

[Florent]

Here is another VM config that cannot start :

bootdisk: virtio0
cores: 1
description: 192.168.0.138%0A
ide2: none,media=cdrom
memory: 1024
name: mariadb-api-ref.dev.limawi.ch
net0: virtio=36:A1:98:F2:BE:EC,bridge=vmbr1
ostype: l26
sockets: 1
virtio0: PVE01-RBD01:vm-143-disk-1,cache=writeback,size=8G

vmbr1 is up (some VM are always in that bridge)...

 

[Florent]

VM 143 finally started on that node, after more than 20 tries (without changing anything...)