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Hi Dmitry,

>> Client uses REST API to interact with Fuel, how is Python version a
factor?

Fuel client is written in python it means it won't work on the master node
with 2.6 python if you drop compatibility with it.

>> What exactly is the use cases that requires a new client deployed on an
old Fuel master node (or vice versa)?

Fuel master node upgrade, we install newer client during the upgrade.

>> It's not that hard ...

It looks not so hard, but it should be well tested before it's merged,
and it's risky because fuel client is installed on the host system, not
into the container, hence in case if something goes wrong we cannot
make automatic rollback.

Thanks,

On Mon, Jan 12, 2015 at 8:24 PM, Dmitry Borodaenko <dborodaenko at mirantis.com
> wrote:

> On Mon, Jan 12, 2015 at 9:10 AM, Evgeniy L <eli at mirantis.com> wrote:
> > Agree with Igor, I think we cannot just drop compatibility for fuel
> client
> > with 2.6 python,
>
> Hm, didn't Igor say in his email that "we have to drop python 2.6 support"?
>
> > the reason is we have old master nodes which have
> > 2.6 python, and the newer fuel client should work fine on these
> > environments.
>
> Client uses REST API to interact with Fuel, how is Python version a factor?
>
> What exactly is the use cases that requires a new client deployed on
> an old Fuel master node (or vice versa)?
>
> > Or we can try to install python 2.7 on the master during the upgrade.
>
> Lets do this. It's not that hard, see the link in an email from Ihar
> Hrachyshka on this thread.
>
> > As for Nailgun I don't see any problems to use 2.7.
> >
> > Thanks,
> >
> > On Mon, Jan 12, 2015 at 7:32 PM, Igor Kalnitsky <ikalnitsky at mirantis.com
> >
> > wrote:
> >>
> >> Hi, Roman,
> >>
> >> Indeed, we have to go forward and drop python 2.6 support. That's how
> >> it supposed to be, but, unfortunately, it may not be as easy as it
> >> seems at first glance.
> >>
> >> Fuel Master is flying on top of Cent OS 6.5 which doesn't have python
> >> 2.7 at all. So we must either run master node on Cent OS 7 or build
> >> python2.7 for Cent OS 6.5. The first case, obviously, requires a lot
> >> of work, while the second one is not. But I may wrong, since I have no
> >> idea what dependencies python 2.7 requires and what we have in our
> >> repos.
> >>
> >> - Igor
> >>
> >> On Mon, Jan 12, 2015 at 4:55 PM, Roman Prykhodchenko <me at romcheg.me>
> >> wrote:
> >> > Folks,
> >> >
> >> > as it was planned and then announced at the OpenStack summit OpenStack
> >> > services deprecated Python-2.6 support. At the moment several
> services and
> >> > libraries are already only compatible with Python>=2.7. And there is
> no
> >> > common sense in trying to get back compatibility with Py2.6 because
> >> > OpenStack infra does not run tests for that version of Python.
> >> >
> >> > The point of this email is that some components of Fuel, say, Nailgun
> >> > and Fuel Client are still only tested with Python-2.6. Fuel Client in
> it’s
> >> > turn is about to use OpenStack CI’s python-jobs for running unit
> tests. That
> >> > means that in order to make it compatible with Py2.6 there is a need
> to run
> >> > a separate python job in FuelCI.
> >> >
> >> > However, I believe that forcing the things being compatible with 2.6
> >> > when the rest of ecosystem decided not to go with it and when Py2.7 is
> >> > already available in the main CentOS repo sounds like a battle with
> the
> >> > common sense. So my proposal is to drop 2.6 support in Fuel-6.1.
> >> >
> >> >
> >> > - romcheg
> >> >
> >> >
> >> >
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> >>
> >>
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>
>
> --
> Dmitry Borodaenko
>
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