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From Will Stevens <wstev...@cloudops.com>
Subject Re: Cherry-picking fix that may change 4.3.1 schema
Date Tue, 02 Sep 2014 15:48:34 GMT
@Rohit
I think we are playing with fire here a bit.  DB changes should be made on
major releases and we should try to avoid DB changes on minor releases
because of this type of problem.  We have to keep the upgrade paths as
clean as possible because we don't want people running into issues when
they upgrade their prod boxes.

I think we are going to have a problem with this one because I think the
4.4.1 branch is going to be released before the 4.3.1 branch, so the
upgrade path will be broken.  My understanding is that the 4.4.1 branch is
planned to be launched on Monday (Sept 8th), so I expect there will be a
problem with the upgrade path if we implement this change in 4.3.1.  Thats
my two cents anyway...

@Rajani
I am not entirely sure which technology is being used for the db upgrade
paths, but I think it is probably something like liquibase already.  I
would have to check on the technology, but this is already in place.  The
issue is more about maintaining an upgradeable path for each version that
is released.  This is a bit complicated by the fact that we currently have
4.3, 4.4 and 4.5 version all having changes made to them at the same time...


*Will STEVENS*
Lead Developer

*CloudOps* *| *Cloud Solutions Experts
420 rue Guy *|* Montreal *|* Quebec *|* H3J 1S6
w cloudops.com *|* tw @CloudOps_


On Tue, Sep 2, 2014 at 11:28 AM, Rohit Yadav <rohit.yadav@shapeblue.com>
wrote:

>
> On 02-Sep-2014, at 5:07 pm, Francois Gaudreault <fgaudreault@cloudops.com>
> wrote:
> > I see. Well, I think we were impacted by that too, and we made the
> decision to move on 4.4.1-snap (even if it's technically less stable?) and
> then upgrade to 4.4.1 GA (next week?)
> >
> > I personally don't think pulling back DB changes in lower releases is a
> good idea :S
> >
> > But that's only my opinion :)
>
> I raised a concrete issue regarding 4.3.1/4.4.1 release and I would like
> to stick to that only. I understand there are too many numbers, versions
> and branches to follow, so please if you can try to understand the issue;
>
> This issue — https://issues.apache.org/jira/browse/CLOUDSTACK-6756
> requires that there are some extra columns in the database to do book
> keeping when delete ips so you don’t actually delete db/table rows.
>
> The issue above is fixed in an upgrade path from 4.3.0 to 4.4.0:
>
> https://git-wip-us.apache.org/repos/asf?p=cloudstack.git;a=blobdiff;f=setup/db/db/schema-430to440.sql;h=226260804523c79e3ce3cfa3c407b5ac698d749c;hp=3b525c41a1befd94c5ffc324c357b566606a97d0;hb=ce6a53e;hpb=d0f806b3a486c58b033083fc57f39dd686e31750
>
> But, we already have 4.4.0 release and db upgrade paths are always in the
> next release versions.
>
> So, there is no upgrade path from 4.3.1 to 4.4.0; as 4.3.1 version does
> not care about 4.4.0 schema changes. There is only an upgrade path from
> 4.3.0 to 4.3.1. So, the limitation is that people won’t be able to upgrade
> from 4.3.1 to 4.4.0, because 4.4.0 is already released.
>
> If we release 4.4.1 before 4.3.1, we’ll have the same issue. So, we can
> put the fix from the JIRA issue on 4.3 branch so the issue is fixed for
> 4.3.1. The fix will be in the 4.3.0 to 4.3.1 upgrade path. And, if we
> release 4.4.1 after 4.3.1, we can fix the upgrade path from 4.3.1 to 4.4.1
> on 4.4 branch such that
>
> The abstract issue is — we’ll have such issue in future, how do we fix it.
> I suggested — we make a separate tool that does (rolling) upgrades.
>
> Regards,
> Rohit Yadav
> Software Architect, ShapeBlue
> M. +41 779015219 | rohit.yadav@shapeblue.com
> Blog: bhaisaab.org | Twitter: @_bhaisaab
>
>
>
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