[Users] how do you connect to a host's serial console

[Michal Skrivanek]

On Apr 8, 2014, at 15:46 , Jeremiah Jahn <jeremiah at goodinassociates.com> wrote:

> That's a nice theory you've got there... :) I'd think a little script
> management would go a long way until you have _every_ possible use
> case in the system. :)  

it's not about every possible use case, it's about keeping the code working. Letting hooks go wild and unmaintained is not a good idea…
There were discussions on mailing list about having a nice interface in UI for hooks  but as far as I remember it was always turned down
Though I personally would welcome at least a monitoring of deployed hooks somewhere in the UI…

Thanks,
michal

> As a developer I find at some point I always
> get talked into adding that extra bit of flexibility even though no
> user should ever need it. They always find something I never thought
> of.
> 
> btw, do I put feature requests in bugzilla, or is there some other place?
> 
> Thanks for all of the help.
> 
> On Tue, Apr 8, 2014 at 2:11 AM, Michal Skrivanek
> <michal.skrivanek at redhat.com> wrote:
>> 
>> On Apr 7, 2014, at 23:04 , Jeremiah Jahn <jeremiah at goodinassociates.com> wrote:
>> 
>>> that seems silly. Seems like the kinda thing that would be a nice
>>> feature to have in the webadmin stuff. esp if you have 100's of hosts.
>>> oh well, thanks for the help.
>> 
>> you're not supposed to need a hook under normal circumstances, when the functionality is useful enough it should be built into vdsm natively...well, that's in progress for this one for 3.4.1:)
>> 
>> Thanks,
>> michal
>> 
>>> 
>>> On Mon, Apr 7, 2014 at 3:46 PM, Michal Skrivanek
>>> <michal.skrivanek at redhat.com> wrote:
>>>> 
>>>> 
>>>>> On 07 Apr 2014, at 22:25, Jeremiah Jahn <jeremiah at goodinassociates.com> wrote:
>>>>> 
>>>>> And just to verify... All hooking scripts have to be placed on each
>>>>> host by hand?
>>>> 
>>>> Yes
>>>> 
>>>>> 
>>>>> On Mon, Apr 7, 2014 at 2:40 PM, Antoni Segura Puimedon
>>>>> <asegurap at redhat.com> wrote:
>>>>>> 
>>>>>> 
>>>>>> ----- Original Message -----
>>>>>>> From: "Michal Skrivanek" <michal.skrivanek at redhat.com>
>>>>>>> To: "Jeremiah Jahn" <jeremiah at goodinassociates.com>
>>>>>>> Cc: users at ovirt.org
>>>>>>> Sent: Monday, April 7, 2014 4:31:11 PM
>>>>>>> Subject: Re: [Users] how do you connect to a host's serial console
>>>>>>> 
>>>>>>> 
>>>>>>> On Apr 7, 2014, at 16:23 , Jeremiah Jahn <jeremiah at goodinassociates.com>
>>>>>>> wrote:
>>>>>>> 
>>>>>>>> thx, So dumb question at this point. I'm in the process of moving from
>>>>>>>> virt-manager to ovirt.  virsh has an edit domain function, or I can
>>>>>>>> edit the xml by hand. I'm able to locate the xml on the host, but
>>>>>>>> obviously if I edit it by hand it will be replaced by vdsm. I'm having
>>>>>>>> a hell of a time trying to find the xml on the engine, so that I can
>>>>>>>> try modifying the xml to add a serial console.  Based on that code
>>>>>>>> that's all that's really going on with that patch. So I'd think I can
>>>>>>>> wing it by modifying the db or xml directly.  Just not sure where to
>>>>>>>> go to do so.  I'm guessing I could go into vm_device and replace
>>>>>>>> device='virtio-serial' with 'serial'  but that seems to easy. Any
>>>>>>>> pointers you've got on how the xml is stored or produced would be
>>>>>>>> great.
>>>>>>> 
>>>>>>> It's a bit more complicated than that....there's no XML stored in the backend.
>>>>>>> You'd be better off applying the patch over and compile yourself:)
>>>>>>> The supported way of how to amend the libvirt XML is via VDSM hooks. You need
>>>>>>> to intercept the created XML and add whatever is needed, see
>>>>>>> http://www.ovirt.org/VDSM-Hooks, some of the examples can be used as a base
>>>>>>> for what you're trying to do...
>>>>>> 
>>>>>> Yup, before_vm_start before_vm_migrate should allow you to do what you want.
>>>>>> 
>>>>>>> 
>>>>>>> Thanks,
>>>>>>> michal
>>>>>>> 
>>>>>>>> 
>>>>>>>> On Mon, Apr 7, 2014 at 9:00 AM, Michal Skrivanek
>>>>>>>> <michal.skrivanek at redhat.com> wrote:
>>>>>>>>> 
>>>>>>>>> On Apr 7, 2014, at 15:57 , Jeremiah Jahn <jeremiah at goodinassociates.com>
>>>>>>>>> wrote:
>>>>>>>>> 
>>>>>>>>>> So do you think this is a 3.5 thing or a 3.4.1 thing? It's exactly
>>>>>>>>>> what I need, just curious how long I'll have to wait. I know this is
>>>>>>>>>> every developers favorite question.
>>>>>>>>> 
>>>>>>>>> one needs to nag Vinzenz frequently enough....:-D
>>>>>>>>> 
>>>>>>>>> ....but should be 3.4.1
>>>>>>>>> 
>>>>>>>>> Thanks,
>>>>>>>>> michal
>>>>>>>>> 
>>>>>>>>>> 
>>>>>>>>>> On Mon, Apr 7, 2014 at 5:58 AM, Michal Skrivanek
>>>>>>>>>> <michal.skrivanek at redhat.com> wrote:
>>>>>>>>>>> 
>>>>>>>>>>> On Apr 6, 2014, at 21:50 , Jeremiah Jahn <jeremiah at goodinassociates.com>
>>>>>>>>>>> wrote:
>>>>>>>>>>> 
>>>>>>>>>>>> I just can't seem to figure this out.  I've enabled 'VirtIO Console
>>>>>>>>>>>> Device' yet I can't seem to find anyplace that will let me get there.
>>>>>>>>>>>> If I go to virsh on the host and try ttyconsoe that doesn't  work
>>>>>>>>>>>> either.  thanks for any help.
>>>>>>>>>>> 
>>>>>>>>>>> Does not work. Pending this[1] patch to get in.
>>>>>>>>>>> 
>>>>>>>>>>> Thanks,
>>>>>>>>>>> michal
>>>>>>>>>>> 
>>>>>>>>>>> [1] http://gerrit.ovirt.org/#/c/25979/
>>>>>>>>>>> 
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>>>>>>>>>>> 
>>>>>>>>> 
>>>>>>> 
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>>