[libvirt-users] Fedora 19/20 new install :Unable to create vcpu cgroup

[Kashyap Chamarthy]

On Sun, Jun 15, 2014 at 09:01:29AM +0300, Patrick Chemla wrote:

[. . .]

> When trying to create a new VM using virt-manager I am getting :
> 
> Impossible de terminer l'installation : « internal error: process exited
> while connecting to monitor: Failed to create chardev
>  »
> 
> Traceback (most recent call last):
>   File "/usr/share/virt-manager/virtManager/asyncjob.py", line 91, in
> cb_wrapper
>     callback(asyncjob, *args, **kwargs)
>   File "/usr/share/virt-manager/virtManager/create.py", line 1787, in
> do_install
>     guest.start_install(meter=meter)
>   File "/usr/share/virt-manager/virtinst/guest.py", line 403, in
> start_install
>     noboot)
>   File "/usr/share/virt-manager/virtinst/guest.py", line 467, in
> _create_guest
>     dom = self.conn.createLinux(start_xml or final_xml, 0)
>   File "/usr/lib64/python2.7/site-packages/libvirt.py", line 2897, in
> createLinux
>     if ret is None:raise libvirtError('virDomainCreateLinux() failed',
> conn=self)
> libvirtError: internal error: process exited while connecting to monitor:
> Failed to create chardev
> 
> 
> When tyring to create new VM with virt-install, I am getting:
> 
> virt-install --name eff1 --disk /home/kvmimages/eff1.img  --cdrom
> /home/kvmimages/Fedora-20-x86_64-DVD.iso --memory 4096B
> ERROR    Error: --memory 4096B: invalid literal for int() with base 10:
> '4096B'

This is an invalid invocation.

> [root at eff1 kvmimages]# virt-install --name eff1 --disk
> /home/kvmimages/eff1.img  --cdrom /home/kvmimages/Fedora-20-x86_64-DVD.iso
> --memory 4096
> WARNING  CDROM media does not print to the text console by default, so you
> likely will not see text install output. You might want to use --location.
> 
> Début d'installation...
> ERROR    internal error: process exited while connecting to monitor: Failed
> to create chardev

I just tested on my Fedora-20 machine, trying to boot a Fedora-19 VM it
works for me:


    $ qemu-img create -f qcow2 -o preallocation=metadata \
      /export/vmimages/f19vm 4G

    $ virt-install --name f19vm --disk /export/vmimages/f19vm \
      --cdrom /export/Fedora-Live-Desktop-x86_64-19-1.iso \
      --memory 2048
    
    Starting install...
    Creating domain...
    .
    .
    .

 
But, I should mention that I'm using virt packages from Rawhide:

    $ rpm -q virt-install libvirt-daemon-kvm qemu-system-x86
    virt-install-1.0.1-3.fc21.noarch
    libvirt-daemon-kvm-1.2.6-1.fc20.x86_64
    qemu-system-x86-2.0.0-1.fc21.x86_64

> When trying to run with virt-manager a VM created on another F20 server:
> 
> Erreur lors du démarrage du domaine: internal error: process exited while
> connecting to monitor: Failed to create chardev
> 
> 
> Traceback (most recent call last):
>   File "/usr/share/virt-manager/virtManager/asyncjob.py", line 91, in
> cb_wrapper
>     callback(asyncjob, *args, **kwargs)
>   File "/usr/share/virt-manager/virtManager/asyncjob.py", line 127, in tmpcb
>     callback(*args, **kwargs)
>   File "/usr/share/virt-manager/virtManager/domain.py", line 1355, in
> startup
>     self._backend.create()
>   File "/usr/lib64/python2.7/site-packages/libvirt.py", line 708, in create
>     if ret == -1: raise libvirtError ('virDomainCreate() failed', dom=self)
> libvirtError: internal error: process exited while connecting to monitor:
> Failed to create chardev
> 
> 
> What is this chardev error?

Ensure you have correct permissions to allow QEMU to access disk images
in your $HOME directory:

    $ chmod o+rx $HOME

I guess that should resolve it.

-- 
/kashyap