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From Rajani Karuturi <raj...@apache.org>
Subject Re: Cherry-picking fix that may change 4.3.1 schema
Date Tue, 02 Sep 2014 15:40:58 GMT
The right way to do this is to do commit to commit migrations and use some
db versioning tools like liquibase or flywaydb which will execute the new
change sets. We discussed this before and IIRC, someone started working on
it.


On Tue, Sep 2, 2014 at 20:58 PM, Rohit Yadav <rohit.yadav@shapeblue.com>
wrote:


On 02-Sep-2014, at 5:07 pm, Francois Gaudreault <fgaudreault@cloudops.com
<javascript:;>> 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 <javascript:;>
Blog: bhaisaab.org | Twitter: @_bhaisaab



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~Rajani
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