[virt-tools-list] Question about the Gsettings and dconf and Design document.

[Avaneendra Alugupalli]

Cole
 Thanks for the response. I will try with --test-first-run option to see
how it pans out.

Cheers
-Avaneendra

On Tue, Nov 17, 2015 at 1:54 PM, Cole Robinson <crobinso at redhat.com> wrote:

> On 11/17/2015 01:47 PM, Avaneendra Alugupalli wrote:
> > Cole
> >  Thanks for your time. Will try to ask again. Sorry for my bad english
> :).
> > Will try my best
> > this time.
> >
> > I downloaded the code and tried to run the virt-manager.py of off eclipse
> > Pydev IDE.
> > Ran into some issues, not sure the order but ran
> > glib-compile-schemas data/*schamas*
> > ran "python setup.py -install"
> >
> > after that virt-manager sucessfully came up "with auto connected to
> lxc:///
> > and qemu://system"
> > *
> > *
> > Now I wanted to understand the code, ran the virt-manager in pdb
> -debugger.
> > stepping into the config code found that the
> > "/org/virt-manager/virt-manager/connections/uris"
> > is already populated with " lxc:/// and qemu://system" value.
> >
> > but I see that this tuple in dconf DB is only updated by engine code. now
> > wondering how
> > does config is able to see the " lxc:/// and qemu://system" values.
> >
>
> If this was your first time running virt-manager, there is some first-run
> code
> to try and determine a default connection, see engine.py:_add_default_conn
> as
> a starting point.
>
> That said, I don't know what could have caused the app to start up with
> both
> qemu:///system _and_ lxc:/// in the connection list, it should only be one
> or
> the other (or none, or an error message). You sure you definitely haven't
> run
> virt-manager before?
>
> FWIW you can test the first-run behavior again by using virt-manager
> --debug
> --test-first-run, if you're just trying to figure out how it works
>
> - Cole
>
> >
> > On Tue, Nov 17, 2015 at 1:37 PM, Cole Robinson <crobinso at redhat.com
> > <mailto:crobinso at redhat.com>> wrote:
> >
> >     On 11/17/2015 11:40 AM, Avaneendra Alugupalli wrote:
> >     > hi Cole
> >     >  Thanks for the response.
> >     >>
> >     >
> >     >>The functions that add/remove/list the URIs in config.py are
> add_conn,
> >     >> remove_conn, list_conn_uris respectively. They are called from
> engine.py
> >     >
> >     > From the code in virt-manager.py main handler, I find that the
> >     > config object is getting created before the engine object?. Is
> that for the first
> >     > time when I run the virt-manager app. config sees default values
> of connections/
> >     > uris to none [] and then engine creates them. And even if the app
> is exited
> >     > we still have non default values ("qemu:///sysmtem" and "lxc://")
> in the dconf?.
> >     > perhaps not delete those values from dconf?.
> >     >
> >
> >     Sorry, I'm not really following what you are saying. Can you
> describe the
> >     problem you are hitting, step by step, and exactly what you are
> trying to
> >     determine?
> >
> >     Also, take a look at dconf-editor, it's a UI tool for exploring
> dconf values.
> >     Might explain what you are seeing.
> >
> >     - Cole
> >
> >     >
> >     > On Mon, Nov 16, 2015 at 8:09 PM, Cole Robinson <
> crobinso at redhat.com <mailto:crobinso at redhat.com>
> >     > <mailto:crobinso at redhat.com <mailto:crobinso at redhat.com>>> wrote:
> >     >
> >     >     On 11/16/2015 02:17 PM, Avaneendra Alugupalli wrote:
> >     >     > hi
> >     >     >  I am trying to understand the code for virt-manager and
> found
> >     that during the
> >     >     > config object create, gets the connections / uris using the
> >     Gsettings API. and
> >     >     > these are the entries in dconf database.
> >     >     >
> >     >     > forchild inself._settings.list_children():
> >     >     > childschema =self._root +"."+child
> >     >     > self._settingsmap[child] =Gio.Settings.new(childschema)
> >     >     >
> >     >     >
> >     >     > returns connections/uris as "qemu:///system" and "lxc:///".
> From the
> >     >     >
> >     >     > I can see that data
> >     >     >
> >     >
> >      <https://github.com/virt-manager/virt-manager/tree/master/data
> >/org.virt-manager.virt-manager.gschema.xml
> >     >     > makes
> >     >     > default entry for these fields. How ever am unable to track
> who is
> >     updating
> >     >     > the connections/uris to "qemu:///system" and "lxc:///"
> strings.
> >     >
> >     >     The functions that add/remove/list the URIs in config.py are
> add_conn,
> >     >     remove_conn, list_conn_uris respectively. They are called from
> engine.py
> >     >
> >     >     > Also is there any architecture/ design document to
> understand the
> >     code at very
> >     >     > higher
> >     >     > level?.
> >     >
> >     >     No unfortunately :/
> >     >
> >     >     - Cole
> >     >
> >     >
> >
> >
>
>
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