Re: [Qemu-discuss] VGA choices

[Narcis Garcia]

screen allows you to set names to sessions, for use them to attach to
those sessions.
p.e.:
screen -S machine1 -d -m qemu ...


El 01/02/17 a les 11:45, Vincenzo Romano ha escrit:
> What you say, Narcis, makes sense. And a lot of it.
> I will make a few tests to "engineer" a stable solution with curses,
> as VNC is already working out-of-the-box.
> The main problem is to run a dozen of VMs each with its own
> screen/tmux/byobu session and to be able
> to select the right one.
> 
> With VNC, SSH and different loopback addresses this is trivial.
> 
> Thanks.
> 
> --
> Vincenzo Romano - NotOrAnd.IT
> Information Technologies
> --
> NON QVIETIS MARIBVS NAVTA PERITVS
> 
> 
> 2017-02-01 11:35 GMT+01:00 Narcis Garcia <address@hidden>:
>> Any text display should be lighter than any graphic one.
>> I got most of details from: 1 Documentation, 2 Lists&forums, 3 try and
>> error.
>>
>>
>> El 01/02/17 a les 10:48, Vincenzo Romano ha escrit:
>>> Hi Narcis,
>>>
>>> Thank you for the extra details: the documentation is quite terse if
>>> not insufficient.
>>> I mean: https://qemu.weilnetz.de/doc/qemu-doc.html linked as the
>>> official user manual from
>>> http://wiki.qemu.org/Manual.
>>>
>>> According to your experience, which approach is the "lightest" among
>>> "-display vnc" and "-ncurses"?
>>>
>>> Finally, may I ask you where did you pull these details from?
>>>
>>> Thanks again.
>>> --
>>> Vincenzo Romano - NotOrAnd.IT
>>> Information Technologies
>>> --
>>> NON QVIETIS MARIBVS NAVTA PERITVS
>>>
>>>
>>> 2017-02-01 9:23 GMT+01:00 Narcis Garcia <address@hidden>:
>>>> -nographic cannot be combined with any other -display.
>>>> As far as I know, Curses go to local stdout; you can see easily when you
>>>> lauch Qemu from command line and, by intuition I supose that, (same as
>>>> SDL) closing the stdout channel/terminal Qemu process can be closed too.
>>>>
>>>> You could launch Qemu process in a "screen" session, and attach remotely
>>>> to it when you connect through SSH.
>>>>
>>>>
>>>> El 01/02/17 a les 08:51, Vincenzo Romano ha escrit:
>>>>> Thanks, Narcis.
>>>>>
>>>>> 2017-02-01 8:29 GMT+01:00 Narcis Garcia <address@hidden>:
>>>>>> VNC is a protocol to connect to a GUI, not MDA/TXT.
>>>>>> Independently of what guest OS does or shows, Qemu only outputs display
>>>>>> through:
>>>>>> - VNC (graphic)
>>>>> Networked
>>>>>
>>>>>> - SDL (graphic)
>>>>> Local to the host
>>>>>
>>>>>> - GTK (graphic)
>>>>> Local to the host (maybe also networked with X11)
>>>>>
>>>>>> - Curses (text)
>>>>> Local?
>>>>>
>>>>>> - none (no display)
>>>>> None, indeed.
>>>>>
>>>>> My host is a headless server and I'd like to save all resources I can
>>>>> from it to give them to the guests.
>>>>> So I need remote access to the guests that I would like to do with
>>>>> SSH, RDP or VNC
>>>>> (the latter two with SSH tunnels).
>>>>>
>>>>> VNC seems to me a solution, but I couldn't find enough details about
>>>>> the curses solution which
>>>>> would be my preferred solution because of its low requirements.
>>>>> Where is the ncurses output pushed to? A local PTY? A Unix socket?
>>>>>
>>>>> Why cannot I use -nographic with -daemonize (and VNC)?
>>>>>
>>>>>> El 31/01/17 a les 21:14, Vincenzo Romano ha escrit:
>>>>>>> Hi.
>>>>>>> Thanks for the feedback.
>>>>>>>
>>>>>>> I need to have a text mode console to the server via VNC (or actually
>>>>>>> whatever else) in case the network is not working or to operate on the
>>>>>>> BIOS and the boot loader.
>>>>>>> And I would like to have such a thing as lean as possible to save
>>>>>>> resources on the host.
>>>>>>> As of now I am using "-vga virtio" that is a full blown VGA. I am
>>>>>>> thinking about a PC with just 80x25 screen.
>>>>>>>
>>>>>>> --
>>>>>>> Vincenzo Romano - NotOrAnd.IT
>>>>>>> Information Technologies
>>>>>>> --
>>>>>>> NON QVIETIS MARIBVS NAVTA PERITVS
>>>>>>>
>>>>>>>
>>>>>>> 2017-01-31 19:47 GMT+01:00 A. Wan <address@hidden>:
>>>>>>>> On Tue, January 31, 2017 09:54, Vincenzo Romano wrote:
>>>>>>>>> Sorry for the typo:
>>>>>>>>>
>>>>>>>>> BBC=VNC
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> Il 31 gen 2017 18:48, "Vincenzo Romano" <address@hidden> ha
>>>>>>>>> scritto:
>>>>>>>>>
>>>>>>>>> Hi all.
>>>>>>>>> I need to create a number of VM to be used as Linux servers.
>>>>>>>>> I am planning to use only a VNC console.
>>>>>>>>> Can I disable the VGA settings (-vga none) and only use the BBC 
>>>>>>>>> server?
>>>>>>>>> If not, what's the minimal (as far as the host resources are 
>>>>>>>>> concerned)
>>>>>>>>> configuration for the local text-only console via VNC?
>>>>>>>>>
>>>>>>>>> TIA.
>>>>>>>>>
>>>>>>>>
>>>>>>>> I don't think it is possible to VNC to text mode console.  Is there a 
>>>>>>>> reason
>>>>>>>> why you don't want to telnet/ssh to a guest and then run screen?
>>>>>>>>
>>>>>>>> Alex
>>>>>>>>
>>>>>>>
>>>>>>
>>>>>
>>>>
>>>
>>
>