[ovirt-users] list of answer file parameters?

[Jorick Astrego]

On 08/15/2014 03:16 PM, Yedidyah Bar David wrote:
> ----- Original Message -----
>> From: "Jorick Astrego" <j.astrego at netbulae.eu>
>> Cc: users at ovirt.org
>> Sent: Friday, August 15, 2014 3:32:09 PM
>> Subject: Re: [ovirt-users] list of answer file parameters?
>>
>>
>> On 08/15/2014 02:21 PM, Yedidyah Bar David wrote:
>>> ----- Original Message -----
>>>> From: "Alon Bar-Lev" <alonbl at redhat.com>
>>>> To: "Jorick Astrego" <j.astrego at netbulae.eu>
>>>> Cc: users at ovirt.org
>>>> Sent: Friday, August 15, 2014 1:59:41 PM
>>>> Subject: Re: [ovirt-users] list of answer file parameters?
>>>>
>>>>
>>>>
>>>> ----- Original Message -----
>>>>> From: "Jorick Astrego" <j.astrego at netbulae.eu>
>>>>> To: users at ovirt.org
>>>>> Sent: Friday, August 15, 2014 1:27:23 PM
>>>>> Subject: [ovirt-users] list of answer file parameters?
>>>>>
>>>>> Hi,
>>>>>
>>>>> I'm looking everywhere for a full list of "OVESETUP" parameters that can
>>>>> be used in the installer answerfile.
>>>>>
>>>>> Searched the red hat manual and found some in:
>>>>>
>>>>> "3.6. Passwords in Red Hat Enterprise Virtualization Manager"
>>>>>
>>>>> But there are more. I can get it from a finished install but some
>>>>> parameters only apply to some types of installation.
>>>>>
>>>>> I found this one form lzap:
>>>>>
>>>>> https://gist.github.com/lzap/7a8cbb7f44d41e4ad171
>>>>>
>>>>> But I don't know if it's complete or just for his personal use.
>>>>>
>>>>> No hurry, I know you are all busy ;-)
>>>>>
>>>> Hi,
>>>>
>>>> The simplest way is to perform setup and record the answer file.
>>>>
>>>> You can even <Ctrl>C at the summary confirmation question and answer file
>>>> will be generated for you without installing anything.
>>>>
>>>> Full list is available at
>>>> /usr/share/ovirt-engine/setup/ovirt_engine_setup/,
>>>> seek *.py and look for @osetupattrs with answerfile=True. Maybe in future
>>>> we
>>>> can have utility to extract all with description.
>>> Also note:
>>>
>>> 1. The files there are separated between different packages, so you'll not
>>> necessarily have all, if you did not install some optional ones.
>>>
>>> 2. Not all combinations are supported, and in principle it's possible to
>>> manually
>>> create answer files that will cause setup to fail, or even to succeed but
>>> leave
>>> an unsupported, unexpected system setup. I started writing about this some
>>> time
>>> ago in [1] but got stuck in the middle, and Alon said I should not call it
>>> Otopi
>>> because it does not document Otopi but engine-setup, and he is largely
>>> right.
>>> See also [2], which is not directly related (key is not answerfile=True),
>>> but does
>>> give a relevant example.
>>>
>>> [1] http://www.ovirt.org/Otopi
>>> [2] https://bugzilla.redhat.com/show_bug.cgi?id=1101001
>> Yes that was my problem, I was trying to do AIO install but
>> engine-cleanup didn't work because a version mismatch.
> Perhaps because you upgraded ovirt-engine-setup without running engine-setup.
> You should have been able to fix by downgrading it.
>
>> So I tried removing everything by hand but the installer never asked me
>> the install local VDSM question... Then I thought I'd get smart and just
> Perhaps you did not have the allinone plugin itself? Or removed its
> /etc/ovirt-engine-setup.conf.d/10-packaging-aio.conf ?
> Or something like that?
>
>> edit the answer the installer generated and add the AIO lines to it.
>> But nearly all the settings are undocumented so I had to resort to
>> searching on what to set them to on pastebin etc. In the end, I
>> reinstalled the host as it was quicker to do a fresh install.
>>
>> Also I want to create puppet files and deploy engine through foreman.
>>
>> I think as a workaround, I'll do a couple of different installs and rip
>> the generated answer file from them. But when a new parameter get's
>> introduced, I will never know about it until I run into an issue.
> I think that using the kept files during the same minor (e.g. generate
> on 3.4.2, use for 3.4.3) should usually be safe (but not always). When
> upgrading to 3.5, I suggest to run again interactively to generate new
> answer files.
>
>> Something like "ovirt-installer --list-answerfile" should be possible
>> IMHO, as the installer uses and verifies the parameters on install. I'm
>> not a programmer but it should be able to spit out a list them.
> We had several discussions in the past re this.
>
> We'd rather not do that. Main reason is what I explained above - some
> combinations will not work well.
>
> I think the main flows to using answer files are:
>
> 1. Most common - you have a specific env you want to be able to generate
> (including specific packages/plugins installed, specific answers you want
> to give etc). You just run engine-setup interactively and keep the
> generated answer file, and do not edit it. It will in principle be good
> only for an exact copy (same versions of packages etc.).
>
> 2. You do some testing of engine-setup and need to run it lots of times,
> interactively, and just not want to have to answer all the questions, just
> some of them. So you run engine-setup, edit the answer file and remove the
> answers you want to give interactively and use that.
>
> 3. Similar to 2. above, but you just want to keep very few answers (such
> as the one for the question warning you against running setup with not
> enough memory :-) ). So you keep a very small answer file and either
> press Enter to accept defaults or fill in answers you want to test interactively.
>
> Of course, if you have a question regarding a specific key, you are welcome
> to ask, and/or search for it in the python files and try to understand how
> it's used (for many, it's easy to understand).
Ok, I understand. Thanks for the info.

As ovirt-cleanup is not working and reinstall fails with "detail: Cannot 
create Data Center. The Data Center name is already in use.", I'd like 
to drop the database when I rerun the installer. I found:

*OVESETUP_REMOVE*

But I don't know what to tell it..

Kind regards,
Jorick Astrego

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