[Qemu-devel] Why got no response of vnc?

[Qemu-devel] Why got no response of vnc?

[Sam]

Hi all,

I'm starting vm using:

kvm]$ sudo /usr/local/bin/qemu-system-x86_64 -m 256 -hda test.qcow2 -cdrom
> CentOS-7-x86_64-DVD-1503-01.iso -boot d
> VNC server running on '127.0.0.1:5900'


then I start vnc client in another PC to connect 10.253.23.24:11800 and
10.253.23.24:5900, I got time out, why?

Re: [Qemu-devel] Why got no response of vnc?

[Sam]

I follow this:
https://en.wikibooks.org/wiki/QEMU/QEMU_Hello_World:_Installing_QEMU_and_getting_it_up_and_running

2017-08-25 14:31 GMT+08:00 Sam <batmanustc@gmail.com>:

> Hi all,
>
> I'm starting vm using:
>
> kvm]$ sudo /usr/local/bin/qemu-system-x86_64 -m 256 -hda test.qcow2
>> -cdrom CentOS-7-x86_64-DVD-1503-01.iso -boot d
>> VNC server running on '127.0.0.1:5900'
>
>
> then I start vnc client in another PC to connect 10.253.23.24:11800 and
> 10.253.23.24:5900, I got time out, why?
>

Re: [Qemu-devel] Why got no response of vnc?

[Sam]

Actually, I just want to install OS and use it, but I found I can't go into
guest OS (as vnc time out), so what should I do?

2017-08-25 14:45 GMT+08:00 Sam <batmanustc@gmail.com>:

> I follow this:
> https://en.wikibooks.org/wiki/QEMU/QEMU_Hello_World:_
> Installing_QEMU_and_getting_it_up_and_running
>
> 2017-08-25 14:31 GMT+08:00 Sam <batmanustc@gmail.com>:
>
>> Hi all,
>>
>> I'm starting vm using:
>>
>> kvm]$ sudo /usr/local/bin/qemu-system-x86_64 -m 256 -hda test.qcow2
>>> -cdrom CentOS-7-x86_64-DVD-1503-01.iso -boot d
>>> VNC server running on '127.0.0.1:5900'
>>
>>
>> then I start vnc client in another PC to connect 10.253.23.24:11800 and
>> 10.253.23.24:5900, I got time out, why?
>>
>
>

Re: [Qemu-devel] Why got no response of vnc?

[Sam]

I use ssh to the host PC, so I think I could not use two screen.

2017-08-25 15:38 GMT+08:00 Sam <batmanustc@gmail.com>:

> Actually, I just want to install OS and use it, but I found I can't go
> into guest OS (as vnc time out), so what should I do?
>
> 2017-08-25 14:45 GMT+08:00 Sam <batmanustc@gmail.com>:
>
>> I follow this:
>> https://en.wikibooks.org/wiki/QEMU/QEMU_Hello_World:_Install
>> ing_QEMU_and_getting_it_up_and_running
>>
>> 2017-08-25 14:31 GMT+08:00 Sam <batmanustc@gmail.com>:
>>
>>> Hi all,
>>>
>>> I'm starting vm using:
>>>
>>> kvm]$ sudo /usr/local/bin/qemu-system-x86_64 -m 256 -hda test.qcow2
>>>> -cdrom CentOS-7-x86_64-DVD-1503-01.iso -boot d
>>>> VNC server running on '127.0.0.1:5900'
>>>
>>>
>>> then I start vnc client in another PC to connect 10.253.23.24:11800 and
>>>  10.253.23.24:5900, I got time out, why?
>>>
>>
>>
>

Re: [Qemu-devel] Why got no response of vnc?

[Thomas Huth]

On 25.08.2017 08:31, Sam wrote:
> Hi all,
> 
> I'm starting vm using:
> 
> kvm]$ sudo /usr/local/bin/qemu-system-x86_64 -m 256 -hda test.qcow2 -cdrom
>> CentOS-7-x86_64-DVD-1503-01.iso -boot d
>> VNC server running on '127.0.0.1:5900'
> 
> then I start vnc client in another PC to connect 10.253.23.24:11800 and
> 10.253.23.24:5900, I got time out, why?

Do you have a firewall running on the host system? It might be blocking
the VNC connection - in that case you could use port forwarding of ssh
(the -L parameter for example), or try to reconfigure your firewall on
the host.

 Thomas


PS: Don't forget to specify --enable-kvm in case you want to use
hardware virtualization.

Re: [Qemu-devel] Why got no response of vnc?

[Sam]

No firewall, as another vm could be connect by vnc, this is the start
command used by that vm, and the disk(*.img) is copied from other place.

$QEMU -smp 4 -m 4096 -enable-kvm $SCRIPT_PATH/$IMG -cdrom $CD -daemonize
-vnc 0.0.0.0:2520 \
 -chardev
socket,id=char-$IF,path=/usr/local/var/run/openvswitch/$IF,server=on \
 -netdev type=vhost-user,id=$IF,chardev=char-$IF \
 -device virtio-net-pci,mac=00:00:af:07:03:02,netdev=$IF \
 -object memory-backend-file,id=mem,size=4096M,mem-path=$MEM_PATH,share=on \
 -numa node,memdev=mem -mem-prealloc \
 -chardev socket,path=$SCRIPT_PATH/qga.sock,server,nowait,id=qga0 \
 -device virtio-serial \
 -device virtserialport,chardev=qga0,name=org.qemu.guest_agent.0 \
 -incoming tcp:0:80818

2017-08-25 16:21 GMT+08:00 Thomas Huth <thuth@redhat.com>:

> On 25.08.2017 08:31, Sam wrote:
> > Hi all,
> >
> > I'm starting vm using:
> >
> > kvm]$ sudo /usr/local/bin/qemu-system-x86_64 -m 256 -hda test.qcow2
> -cdrom
> >> CentOS-7-x86_64-DVD-1503-01.iso -boot d
> >> VNC server running on '127.0.0.1:5900'
> >
> > then I start vnc client in another PC to connect 10.253.23.24:11800 and
> > 10.253.23.24:5900, I got time out, why?
>
> Do you have a firewall running on the host system? It might be blocking
> the VNC connection - in that case you could use port forwarding of ssh
> (the -L parameter for example), or try to reconfigure your firewall on
> the host.
>
>  Thomas
>
>
> PS: Don't forget to specify --enable-kvm in case you want to use
> hardware virtualization.
>
>
>

Re: [Qemu-devel] Why got no response of vnc?

[Philipp Hahn]

Hello,

Am 25.08.2017 um 08:31 schrieb Sam:
> I'm starting vm using:
> 
> kvm]$ sudo /usr/local/bin/qemu-system-x86_64 -m 256 -hda test.qcow2 -cdrom
>> CentOS-7-x86_64-DVD-1503-01.iso -boot d
>> VNC server running on '127.0.0.1:5900'
                          ^^^^^^^^^
This a a *local* host socket,

> then I start vnc client in another PC to connect 10.253.23.24:11800 and
> 10.253.23.24:5900, I got time out, why?

to which you can't connect from any *other* host

$ man qemu-system-x86_64
...
> -vnc display[,option[,option[,...]]]

So try to add '-vnc 10.253.23.24:5900' to your command line to make Qemu
to listen on that IP address of your host you're running the VM on.

Philipp