Xen users - Jul 2013 - Xen guest domains Console- How to interact with it?

Hi,

I am using Xen 4.1.1. I am using console to access domU. The command *xm
console <domain id>* gives me this
timestamp.

T(s=1373371971 us=532140)
T(s=1373371972 us=532207)
T(s=1373371973 us=532275)
T(s=1373371974 us=532342)
T(s=1373371975 us=532409)
T(s=1373371976 us=532477)
T(s=1373371977 us=532545)
T(s=1373371978 us=532613)
T(s=1373371979 us=532680)
T(s=1373371980 us=532747)
T(s=1373371981 us=532814)
T(s=1373371982 us=532885)
T(s=1373371983 us=532954)
T(s=1373371984 us=533021)
T(s=1373371985 us=533088)
T(s=1373371986 us=533156)
T(s=1373371987 us=533223)
T(s=1373371988 us=533290)
T(s=1373371989 us=533358)
T(s=1373371990 us=533427)
T(s=1373371991 us=533495)

I dont know how to interact with such console? I am expecting to see a
normal text login screen.

Please help me what should I do in order to access the domU and perform
various operations on it (installing some apps/software)?
The manual for xm console says that "If you have set up your domains to
have a traditional login console, this will look much like a normal text
login screen."

Please let me know how can I set up the domains to have a traditional login
console?

Btw: my domU guest is MiniOS.



Thanks,

Fizza


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Hello.

El 09/07/13 07:14, Fizza Hussain escribió:
> Hi,
>
> I am using Xen 4.1.1. I am using console to access domU. The command *xm
> console <domain id>* gives me this
> timestamp.
>
> T(s=1373371971 us=532140)
> T(s=1373371972 us=532207)
> T(s=1373371973 us=532275)
> T(s=1373371974 us=532342)
> T(s=1373371975 us=532409)
> T(s=1373371976 us=532477)
> T(s=1373371977 us=532545)
> T(s=1373371978 us=532613)
> T(s=1373371979 us=532680)
> T(s=1373371980 us=532747)
> T(s=1373371981 us=532814)
> T(s=1373371982 us=532885)
> T(s=1373371983 us=532954)
> T(s=1373371984 us=533021)
> T(s=1373371985 us=533088)
> T(s=1373371986 us=533156)
> T(s=1373371987 us=533223)
> T(s=1373371988 us=533290)
> T(s=1373371989 us=533358)
> T(s=1373371990 us=533427)
> T(s=1373371991 us=533495)
>
> I dont know how to interact with such console? I am expecting to see a
> normal text login screen.
Lot of applications write stuff to the console, so the login prompt is 
often lost from the view. Just hit Enter, and it should show up.

The repeated timestamp you see must be debugging output form some app. 
If it spams too fast, the usage of the console might be very uncomfortable.
> Please help me what should I do in order to access the domU and perform
> various operations on it (installing some apps/software)?
Usually, the console of a VM Guest is intended for debugging and 
recovery tasks, specially on a UNIX inspired system. You would probably 
find it more comfortable to perform the system administration via a SSH 
terminal, you even may use it to transport graphic applications to your 
desktop.

Greetings.

-- 
Alexandre Kouznetsov

Hello.

El 10/07/13 00:38, Fizza Hussain escribió:
> Hi Alexandre,
>
> When I press Enter on this console screen, I get this message " No
> console input handler".
This seems to be a normal working condition for MiniOS under Xen. Or at 
least it was 7 years ago. It''s MiniOS issue, not Xen''s.
http://old-list-archives.xen.org/xen-devel/2006-08/msg00224.html
> Can you please explain what does this mean?
Normally, the console is enabled on a tty device (tty0, tty1 and so on). 
Under Xen, since the hypervisor need to me able to communicate with the 
console, a new device hvc0 is used. Apparently, MiniOS can''t handle
this
kind of device for console.
> Do I have to install
> something for the console to be functioning properly?
You may try to hack MiniOS a little bit (maybe altering /etc/inittab 
would be enough) or consider switching Linux distribution.

If I may suggest, trying another Linux seems to be the suitable option 
for your case.

Greetings.

-- 
Alexandre Kouznetsov

On Wed, 2013-07-10 at 10:21 -0500, Alexandre Kouznetsov
wrote:
> Hello.
> 
> El 10/07/13 00:38, Fizza Hussain escribió:
> > Hi Alexandre,
> >
> > When I press Enter on this console screen, I get this message "
No
> > console input handler".
> This seems to be a normal working condition for MiniOS under Xen. Or at 
> least it was 7 years ago. It's MiniOS issue, not Xen's.
> http://old-list-archives.xen.org/xen-devel/2006-08/msg00224.html
MiniOS is not a fully featured OS, it's an embedded style "library
OS"
which you can use to run specific applications as a monolithic PV guest.
Depending on which type of minios you loaded will depend on the
functionality it has. So far as I now none of the normal options include
a shell or anything like that (there are options for stub-qemu,
stub-pvgrub, stub xenstored, stuff like that)
> > Do I have to install
> > something for the console to be functioning properly?
> You may try to hack MiniOS a little bit (maybe altering /etc/inittab 
> would be enough) or consider switching Linux distribution.
MiniOS isn't a Linux distribution, or even a Linux kernel...
> If I may suggest, trying another Linux seems to be the suitable option 
> for your case.
yes, trying a proper OS as a guest would seem wise.

Ian/


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El 10/07/13 10:37, Ian Campbell escribió:
> On Wed, 2013-07-10 at 10:21 -0500, Alexandre Kouznetsov wrote:
>> Hello.
>>
>> El 10/07/13 00:38, Fizza Hussain escribió:
>>> Hi Alexandre,
>>>
>>> When I press Enter on this console screen, I get this message
" No
>>> console input handler".
>> This seems to be a normal working condition for MiniOS under Xen. Or at
>> least it was 7 years ago. It's MiniOS issue, not Xen's.
>> http://old-list-archives.xen.org/xen-devel/2006-08/msg00224.html
>
> MiniOS is not a fully featured OS, it's an embedded style "library
OS"
> which you can use to run specific applications as a monolithic PV guest.
> Depending on which type of minios you loaded will depend on the
> functionality it has. So far as I now none of the normal options include
> a shell or anything like that (there are options for stub-qemu,
> stub-pvgrub, stub xenstored, stuff like that)
>
>>> Do I have to install
>>> something for the console to be functioning properly?
>> You may try to hack MiniOS a little bit (maybe altering /etc/inittab
>> would be enough) or consider switching Linux distribution.
>
> MiniOS isn't a Linux distribution, or even a Linux kernel...
Oh, I have confused Mini-OS with MiniOS! I see the light.
http://wiki.xen.org/wiki/Mini-OS vs http://www.minios.org/

-- 
Alexandre Kouznetsov


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