> On 25 Apr 2024, at 12:20, Ilya Maximets <i.maxim...@ovn.org> wrote:
>
> On 4/25/24 10:53, Vladislav Odintsov wrote:
>> Hi Ilya,
>>
>> I’ve got question regarding upgrade of clustered ovsdb-servers from 3.1 to
>> 3.2+ version.
>> ovsdb(7) states that the recommended path for upgrade is to upgrade
>> ovsdb-servers one-by-one
>> and that after upgrade ovsdb-server should be started with option
>> --disable-file-no-data-conversion
>> and after whole cluster is upgradede, it is needed to enable no-data
>> conversion via appctl.
>>
>> I’ve ran through code and did some upgrade tests, so my question is:
>> Do I understand correctly, that if there is no necessity to call schema
>> conversion after start
>> and before end of cluster upgrade, so it is allowed just to restart
>> ovsdb-servers without
>> --disable-file-no-data-conversion option and this will not have any
>> downsides?
>
> Simply re-starting removing the option is enough. There is no need
> to enable specifically via appctl in this case.
I’m talking about a bit another thing:
I want not to start each upgraded ovsdb-server with
--disable-file-no-data-conversion at all, because it guaranteed in my case that
there will be no schema conversions before full cluster upgrade is finished.
So, in this case there will be no need to enable it back via appctl or removing
''disable" option and restart.
Am I right, or I’m missing something?
>
> Also, we did actually backport parts of the format change to 3.1.
> It should be in v3.1.2 release and newer. So, technically, if you're
> performing upgrade from v3.1.2+, it should be safe to just upgrade as
> usual. ovsdb-servr v3.1.2 understands new database format, though it
> can't produce it on its own. See the following commit on branch-3.1:
>
> 9529e9aa967c ("ovsdb: Allow conversion records with no data in a clustered
> storage.")
Hmm, nice. But mine source version is 3.0 and this is not applicable :)
>
> It would be painful to document all the combinations of minor versions,
> so it's not an officially supported upgrade path, but it is there if
> you know what are you doing.
Sure.
>
> Best regards, Ilya Maximets.
Regards,
Vladislav Odintsov
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