denis@zoo:~/Downloads$ sudo virt-install -n serv -r 1024 --disk path=/var/lib/libvirt/images/serv.img,bus=virtio,size=4 -c CentOS-7-x86_64-NetInstall-1511.iso --network=default,model=virtio --graphics vnc,listen=0.0.0.0 --noautoconsole -v
[sudo] password for denis: 

Starting install...
Allocating 'serv.img'                                       | 4.0 GB  00:00     
ERROR    internal error: process exited while connecting to monitor: 2016-04-03T05:22:01.514547Z qemu-system-x86_64: -chardev socket,id=charchannel0,path=/var/lib/libvirt/qemu/channel/target/domain-serv/org.qemu.guest_agent.0,server,nowait: Failed to bind socket to /var/lib/libvirt/qemu/channel/target/domain-serv/org.qemu.guest_agent.0: Permission denied
Removing disk 'serv.img'                                    |    0 B  00:00     
Domain installation does not appear to have been successful.
If it was, you can restart your domain by running:
  virsh --connect qemu:///system start serv
otherwise, please restart your installation.