Xen users - Jan 2013 - Reboot remote XCP instance via KVM-switch without root access

Hi all!
I''ve forgot (it''s all New Year stress) root password for XCP
server
and try to re-install it with attached KVM-switch. The problem is
server not responds to Ctrl-Alt-Delete, and "Reboot" action in XCP
menu requires root password. KVM-switch has no "reboot" option. Any
thoughts? :)
Thanks.

On Wed, Jan 2, 2013 at 1:13 PM, Sergey <power.real@gmail.com>
wrote:
> Hi all!
> I''ve forgot (it''s all New Year stress) root password for
XCP server
> and try to re-install it with attached KVM-switch. The problem is
> server not responds to Ctrl-Alt-Delete, and "Reboot" action in
XCP
> menu requires root password. KVM-switch has no "reboot" option.
Any
> thoughts? :)
> Thanks.
>

Does the KVM offer a power-cycle option? Shutdown the VM, and power it
up again then boot into "linux single user mode".

-- 
Kind Regards
Rudi Ahlers
SoftDux

Website: http://www.SoftDux.com
Technical Blog: http://Blog.SoftDux.com
Cell: 082 554 7532
Fax: 086 268 8492

Hi Rudi.
> Does the KVM offer a power-cycle option? Shutdown the VM, and power it
> up again then boot into "linux single user mode".
Nice try. But KVM does not have that option.

On Wed, Jan 2, 2013 at 3:35 PM, Rudi Ahlers <Rudi@softdux.com>
wrote:
> On Wed, Jan 2, 2013 at 1:13 PM, Sergey <power.real@gmail.com> wrote:
>> Hi all!
>> I''ve forgot (it''s all New Year stress) root password
for XCP server
>> and try to re-install it with attached KVM-switch. The problem is
>> server not responds to Ctrl-Alt-Delete, and "Reboot" action
in XCP
>> menu requires root password. KVM-switch has no "reboot"
option. Any
>> thoughts? :)
>> Thanks.
>>
>
>
> Does the KVM offer a power-cycle option? Shutdown the VM, and power it
> up again then boot into "linux single user mode".
>
> --
> Kind Regards
> Rudi Ahlers
> SoftDux
>
> Website: http://www.SoftDux.com
> Technical Blog: http://Blog.SoftDux.com
> Cell: 082 554 7532
> Fax: 086 268 8492

>>> On 2013/01/02 at 04:13, Sergey <power.real@gmail.com> wrote: 
> Hi all!
> I''ve forgot (it''s all New Year stress) root password for
XCP server
> and try to re-install it with attached KVM-switch. The problem is
> server not responds to Ctrl-Alt-Delete, and "Reboot" action in
XCP
> menu requires root password. KVM-switch has no "reboot" option.
Any
> thoughts? :)
> Thanks.
I think you''re out of luck - you either need the root password or
physical access.  The one thing you can try is the Magic SysRq key - SysRq + o =
reboot, so if the KVM has the capability of sending keyboard macros, you could
try this key combo for a hard reboot and see if that works.  I don''t
know off the top of my head if XCP supports SysRq out of the box - some systems
support limited features, like halt/reboot, others have it completely disabled,
and then some have all of the SysRq keys enabled.

http://en.wikipedia.org/wiki/Magic_sysrq

-Nick



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