Hi,

the serial console will show output if the kernel knows to use it.

The VNC approach is also possible and I believe we already have a
graphical device present. What you are looking for is probably this
(VNC method is described there):
https://www.ovirt.org/documentation/how-to/hosted-engine/#handle-engine-vm-boot-problems

Best regards

--
Martin Sivak
SLA / oVirt

On Fri, Apr 13, 2018 at 11:26 AM, Thomas Klute <kl...@ingenit.com> wrote:
> Dear oVirt Team,
>
> after trying to reboot a hosted engine setup on oVirt 4.2 the VM won't
> come up anymore.
> The qemu-kvm process is there but we're unable to access the VM using
> - the serial console (simply does not show anything, does not react to
> characters typed)
> - VNC / Spice because the hosted engine vm.conf does not contain any
> graphics device.
>
> Before trying to reinstall, we'd like to recover and debug what is going on.
> We mounted a Centos7 install .iso and started the VM using
> hosted-engine --vm-start
> --vm-conf=/var/run/ovirt-hosted-engine-ha/vm-custom.conf
> But we still have to problem, that the serial console does not show
> anything and there is no way to connect using VNC.
>
> So, what is the recommended way to move forward in such situation?
> IMHO the classical way would be to add a graphics device and connect via
> VNC?
> I did not use the serial console much, up to now. Should the serial
> console show any output during boot?
>
> Thanks for your help,
>  Thomas
>
> --
> ________________________________________________________________________
>
>  Dipl.-Inform. Thomas Klute                           kl...@ingenit.com
>  Geschäftsführer / CEO
>  ----------------------------------------------------------------------
>  ingenit GmbH & Co. KG                       Tel. +49 (0)231 58 698-120
>  Emil-Figge-Strasse 76-80                    Fax. +49 (0)231 58 698-121
>  D-44227 Dortmund                                       www.ingenit.com
>
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> ________________________________________________________________________
>
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