[ovirt-users] Hosted Engine won't start, how to debug?
Martin Sivak
msivak at redhat.com
Sat Apr 14 11:47:22 UTC 2018
Hi,
the vnc device is there by default (I copied it out of my own hosted
engine instance), I do not know why it was missing in your case.
Best regards
Martin Sivak
On Fri, Apr 13, 2018 at 5:13 PM, Thomas Klute <klute at ingenit.com> wrote:
> Dear Martin,
>
> yes, that worked. Thank you so much!!
> We were able to see that the latest kernel update failed and did not
> create the initramfs file and thus the boot process failed with a kernel
> panic.
>
> Debugging this problem took us many hours... It felt so complicated to
> connect a vnc to this vm - compared to a bare metal setup with display
> and keyboard.
> Wouldn't it be a good idea to have the vnc device in the config by default?
>
> Best regards,
> Thomas
>
>> You need to be in global maintenance, but I think you already know that.
>> Then try updating the vm.conf like you already did and add this line:
>>
>> devices={device:vnc,type:graphics,deviceId:f1d0394e-b077-4ea6-99e5-b9b6b8fe073c,address:None}
>>
>> Then restart the VM using hosted-engine commands and try the VNC approach again.
>>
>> Best regards
>>
>> Martin Sivak
>>
>> On Fri, Apr 13, 2018 at 2:35 PM, Thomas Klute <klute at ingenit.com> wrote:
>>> Dear Martin,
>>>
>>> thanks for the feedback.
>>> We already read this and tried it.
>>> It seems to me that the graphics device was removed from the hosted
>>> engine by some ovirt release.
>>>
>>> If I try to set a console password I see this message:
>>>
>>> hosted-engine --add-console-password
>>> Enter password:
>>> no graphics devices configured
>>>
>>> Furthermore, there is nothing listening on port 5900 after that.
>>> The HostedEngine qemu process shows a " -display none " as parameter and
>>> I have no idea where this can be changed.
>>>
>>> I already created a /var/run/ovirt-hosted-engine-ha/vm-custom.conf
>>> containing:
>>> display=vnc
>>> kvmEnable=true
>>>
>>> But nothing changed.
>>> I also edited the HostedEngine VM config using virsh and added a vnc
>>> display:
>>> /usr/bin/virsh -c
>>> qemu:///system?authfile=/etc/ovirt-hosted-engine/virsh_auth.conf edit
>>> HostedEngine
>>>
>>> <graphics type='vnc' port='12355' autoport='no' listen='0.0.0.0'>
>>> <listen type='address' address='0.0.0.0'/>
>>> </graphics>
>>> <video>
>>> <model type='qxl' ram='65536' vram='65536' vgamem='16384'
>>> heads='1' primary='yes'/>
>>> <address type='pci' domain='0x0000' bus='0x00' slot='0x07'
>>> function='0x0'/>
>>> </video>
>>>
>>> But there is still "display none" passed as command line parameter to
>>> qemu and thus, I suppose, there's no display.
>>>
>>> Any help is appreciated, thanks,
>>> Thomas
>>>
>>>
>>>> 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 <klute at 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 klute at 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
>>>>>
>>>>> Registergericht: Amtsgericht Dortmund, HRA 13 914
>>>>> Gesellschafter : Thomas Klute, Marc-Christian Schröer
>>>>> ________________________________________________________________________
>>>>>
>>>>> _______________________________________________
>>>>> Users mailing list
>>>>> Users at ovirt.org
>>>>> http://lists.ovirt.org/mailman/listinfo/users
>>> Sollten noch Fragen offen sein, stehen wir Ihnen natürlich jederzeit
>>> gerne zur Verfügung.
>>>
>>> Mit Grüßen aus Dortmund,
>>> Thomas Klute
>>>
>>> --
>>> ________________________________________________________________________
>>>
>>> Dipl.-Inform. Thomas Klute klute at 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
>>>
>>> Registergericht: Amtsgericht Dortmund, HRA 13 914
>>> Gesellschafter : Thomas Klute, Marc-Christian Schröer
>>> ________________________________________________________________________
>>>
>>
>
> Sollten noch Fragen offen sein, stehen wir Ihnen natürlich jederzeit
> gerne zur Verfügung.
>
> Mit Grüßen aus Dortmund,
> Thomas Klute
>
> --
> ________________________________________________________________________
>
> Dipl.-Inform. Thomas Klute klute at 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
>
> Registergericht: Amtsgericht Dortmund, HRA 13 914
> Gesellschafter : Thomas Klute, Marc-Christian Schröer
> ________________________________________________________________________
>
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