[Users] Package installation error

[Simon Grinberg]

----- Original Message -----
> From: "Shireesh Anjal" <sanjal at redhat.com>
> To: "Alon Bar-Lev" <alonbl at redhat.com>
> Cc: "Simon Grinberg" <simon at redhat.com>, users at ovirt.org
> Sent: Friday, March 22, 2013 8:34:40 AM
> Subject: Re: [Users] Package installation error
> 
> On 03/22/2013 12:11 AM, Alon Bar-Lev wrote:
> >
> > ----- Original Message -----
> >> From: "Simon Grinberg" <simon at redhat.com>
> >> To: "Alon Bar-Lev" <alonbl at redhat.com>
> >> Cc: users at ovirt.org, "Sahina Bose" <sabose at redhat.com>, "Dave
> >> Neary" <dneary at redhat.com>
> >> Sent: Thursday, March 21, 2013 7:40:17 PM
> >> Subject: Re: [Users] Package installation error
> >>
> >>
> >>
> >> ----- Original Message -----
> >>> From: "Alon Bar-Lev" <alonbl at redhat.com>
> >>> To: "Dave Neary" <dneary at redhat.com>
> >>> Cc: users at ovirt.org, "Sahina Bose" <sabose at redhat.com>, "Simon
> >>> Grinberg" <simon at redhat.com>
> >>> Sent: Thursday, March 21, 2013 6:35:56 PM
> >>> Subject: Re: [Users] Package installation error
> >>>
> >>> Simon?
> >>>
> >>> ----- Original Message -----
> >>>> From: "Dave Neary" <dneary at redhat.com>
> >>>> To: "Sahina Bose" <sabose at redhat.com>
> >>>> Cc: "Alon Bar-Lev" <alonbl at redhat.com>, users at ovirt.org
> >>>> Sent: Thursday, March 21, 2013 6:34:56 PM
> >>>> Subject: Re: [Users] Package installation error
> >>>>
> >>>> Hi,
> >>>>
> >>>> On 03/19/2013 05:24 AM, Sahina Bose wrote:
> >>>>> You are right - Gluster 3.4 is only required to manage gluster
> >>>>> clusters.
> >>>>>
> >>>>> Currently the question asked at setup is this :
> >>>>>
> >>>>> "The engine can be configured to present the UI in three
> >>>>> different
> >>>>> application modes. virt [Manage virtualization only], gluster
> >>>>> [Manage
> >>>>> gluster storage only],
> >>>>> and both [Manage virtualization as well as gluster storage]"
> >>>>> where
> >>>>> both
> >>>>> is the default.
> >>>>>
> >>>>> If this is confusing to the user, we can change this message.
> >>>>> Suggestions?
> >>>> I would either:
> >>>>
> >>>> (a) put "Virt" as the default, or
> >> I would go for this one, this keeps backwards compatibility.
> >> Is there an easy method to change this configuration later?
> > Yes, changing the cluster settings.
> 
> No - you can change the cluster settings (virt service/gluster
> service)
> only if the application mode is "both". In virt only mode, the
> cluster
> is virt only, and same with gluster-only. So if you want user to be
> able
> to change the mode *after* installation, this config
> (ApplicationMode)
> must be exposed in the engine-config tool.

So if I'll try to sum up (with reference to other emails on this thread). 
1. Default should be virt only
2. Keep the question and better explain what is the Gluster option (preferable a link to the relevant page) 
3. Add a config option to easily change the selection later 
Need to think about the implication of the third option in case the change conflicts with hosts/clusters that are already configured other wise. 
Example: Initial selection was Virt and now adding dual mode - always OK 
Example: Initial selection was Virt, no host in the setup, and now changing to Gluster mode - OK
Example: Initial selection was Virt, Hosts already in the setup installed in virt mode, and now changing to Gluster mode - What will we do?

My take, 
Config option can only set to dual mode, never the other way around. This will save the need to add sophisticated logic 

Sounds right?


> 
> >
> >>>> (b) remove this question entirely - if someone is installing
> >>>> oVirt,
> >>>> assume they want to manage virt. If someone is installing
> >>>> Gluster,
> >>>> have
> >>>> an option during the Gluster install to have the oVirt
> >>>> management
> >>>> console.
> >> We do want people to get exposed to the Gluster option.
> >>
> >>>> If someone wants to manage both their Gluster bricks and their
> >>>> virt
> >>>> with
> >>>> oVirt, I would make that a post-install option to oVirt -
> >>>> perhaps
> >>>> with
> >>>> an extra package to install (which would depend on the later
> >>>> version
> >>>> of
> >>>> Gluster).
> >>>>
> >>>> Cheers,
> >>>> Dave.
> >>>>
> >>>>
> >>>>
> >>>>> On 03/19/2013 01:41 PM, Dave Neary wrote:
> >>>>>> Hi,
> >>>>>>
> >>>>>> On 03/19/2013 08:16 AM, Alon Bar-Lev wrote:
> >>>>>>> Now I am confused....
> >>>>>>> Do you or don't you need vdsm-gluster on your system?
> >>>>>> Allow me to clarify.
> >>>>>>
> >>>>>> There have been several messages from users since the oVirt
> >>>>>> 3.2
> >>>>>> release asking why they need Gluster 3.4 pre-releases to run
> >>>>>> oVirt.
> >>>>>>
> >>>>>> My understanding is that you don't need Gluster 3.4 unless you
> >>>>>> want to
> >>>>>> manage a Gluster cluster with oVirt.
> >>>>>>
> >>>>>> So my question is: are we sure that we are not leading users
> >>>>>> wrong,
> >>>>>> and confusing them during the installation & set-up process?
> >>>>>>
> >>>>>> Thanks,
> >>>>>> Dave.
> >>>>>>
> >>>> --
> >>>> Dave Neary - Community Action and Impact
> >>>> Open Source and Standards, Red Hat - http://community.redhat.com
> >>>> Ph: +33 9 50 71 55 62 / Cell: +33 6 77 01 92 13
> >>>>
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