[Gluster-users] [Gluster-devel] Upgrade testing to gluster 6

[Atin Mukherjee]

On Mon, 1 Apr 2019 at 10:28, Hari Gowtham <hgowtham at redhat.com> wrote:

> Comments inline.
>
> On Mon, Apr 1, 2019 at 5:55 AM Sankarshan Mukhopadhyay
> <sankarshan.mukhopadhyay at gmail.com> wrote:
> >
> > Quite a considerable amount of detail here. Thank you!
> >
> > On Fri, Mar 29, 2019 at 11:42 AM Hari Gowtham <hgowtham at redhat.com>
> wrote:
> > >
> > > Hello Gluster users,
> > >
> > > As you all aware that glusterfs-6 is out, we would like to inform you
> > > that, we have spent a significant amount of time in testing
> > > glusterfs-6 in upgrade scenarios. We have done upgrade testing to
> > > glusterfs-6 from various releases like 3.12, 4.1 and 5.3.
> > >
> > > As glusterfs-6 has got in a lot of changes, we wanted to test those
> portions.
> > > There were xlators (and respective options to enable/disable them)
> > > added and deprecated in glusterfs-6 from various versions [1].
> > >
> > > We had to check the following upgrade scenarios for all such options
> > > Identified in [1]:
> > > 1) option never enabled and upgraded
> > > 2) option enabled and then upgraded
> > > 3) option enabled and then disabled and then upgraded
> > >
> > > We weren't manually able to check all the combinations for all the
> options.
> > > So the options involving enabling and disabling xlators were
> prioritized.
> > > The below are the result of the ones tested.
> > >
> > > Never enabled and upgraded:
> > > checked from 3.12, 4.1, 5.3 to 6 the upgrade works.
> > >
> > > Enabled and upgraded:
> > > Tested for tier which is deprecated, It is not a recommended upgrade.
> > > As expected the volume won't be consumable and will have a few more
> > > issues as well.
> > > Tested with 3.12, 4.1 and 5.3 to 6 upgrade.
> > >
> > > Enabled, disabled before upgrade.
> > > Tested for tier with 3.12 and the upgrade went fine.
> > >
> > > There is one common issue to note in every upgrade. The node being
> > > upgraded is going into disconnected state. You have to flush the
> iptables
> > > and the restart glusterd on all nodes to fix this.
> > >
> >
> > Is this something that is written in the upgrade notes? I do not seem
> > to recall, if not, I'll send a PR
>
> No this wasn't mentioned in the release notes. PRs are welcome.
>
> >
> > > The testing for enabling new options is still pending. The new options
> > > won't cause as much issues as the deprecated ones so this was put at
> > > the end of the priority list. It would be nice to get contributions
> > > for this.
> > >
> >
> > Did the range of tests lead to any new issues?
>
> Yes. In the first round of testing we found an issue and had to postpone
> the
> release of 6 until the fix was made available.
> https://bugzilla.redhat.com/show_bug.cgi?id=1684029
>
> And then we tested it again after this patch was made available.
> and came  across this:
> https://bugzilla.redhat.com/show_bug.cgi?id=1694010


This isn’t a bug as we found that upgrade worked seamelessly in two
different setup. So we have no issues in the upgrade path to glusterfs-6
release.

<https://bugzilla.redhat.com/show_bug.cgi?id=1694010>
>
> Have mentioned this in the second mail as to how to over this situation
> for now until the fix is available.
>
> >
> > > For the disable testing, tier was used as it covers most of the xlator
> > > that was removed. And all of these tests were done on a replica 3
> volume.
> > >
> >
> > I'm not sure if the Glusto team is reading this, but it would be
> > pertinent to understand if the approach you have taken can be
> > converted into a form of automated testing pre-release.
>
> I don't have an answer for this, have CCed Vijay.
> He might have an idea.
>
> >
> > > Note: This is only for upgrade testing of the newly added and removed
> > > xlators. Does not involve the normal tests for the xlator.
> > >
> > > If you have any questions, please feel free to reach us.
> > >
> > > [1]
> https://docs.google.com/spreadsheets/d/1nh7T5AXaV6kc5KgILOy2pEqjzC3t_R47f1XUXSVFetI/edit?usp=sharing
> > >
> > > Regards,
> > > Hari and Sanju.
> > _______________________________________________
> > Gluster-users mailing list
> > Gluster-users at gluster.org
> > https://lists.gluster.org/mailman/listinfo/gluster-users
>
>
>
> --
> Regards,
> Hari Gowtham.
> _______________________________________________
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>
-- 
--Atin
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