[PKG-Openstack-devel] Status?

[Benedikt Trefzer]

Hi Ondrej


On 10.07.2017 16:33, Ondrej Novy wrote:
> Hi,
>
> 2017-07-10 10:42 GMT+02:00 Benedikt Trefzer <trefzer at cirrax.com
> <mailto:trefzer at cirrax.com>>:
>
>     Keep an eye on upgrade from one stable to another stable debian
>     release. currently (and probably in the future too), openstack
>     only supports incremental upgrade from one
>
> for example Swift supports upgrades even if version diff is > 1.
>
I do not know about swift, but you can add horizon, since it has no DB,
you can skip releases easily.
>
>     I do not have a solution for this problem but I think it's worth
>     thinking about.
>
>
> ack.
>  
>
>     I see two possible ways to solve
>     - accept, (and document) that openstack upgrades are not possible
>     in debian
>
>
> this is not good solution :).
ACK
>  
>
>     - have the intermediat openstack releases as sort of unsupported,
>     use for upgrade only, packages available (eg. as snapshots ?) (but
>     this means you need all branches)
>
>
> this is too much work and not straight forward for users. Why I should
> add unofficial repositories of OS just for upgrade?
>
> If it's possible with other Debian packages, we should found solution
> for OS too. I think it's possible to upgrade OS if version diff is >
> 1. It only needs to be tested, checked and fixed sometimes. Same
> "problem" is in Ubuntu when you are upgrading between LTS versions.
> How Ubuntu solves this?
>
The problem with the upgrades are the databases which needs upgrade.
with plain OS, db upgrades are only possible for n to n+1. So if you
want to support n to n+x upgrades in Debian you need to keep all the DB
migration script from earlier versions.
Even worse, at least nova (others I do not know) does some db-migration
during normal operation, which for large installations can take quite a
while (hours).
 
I think you have to do quite a lot of patching if you want to support n
to n+x upgrades.

I have no idea about Ubuntu's solution  !

Benedikt


> -- 
> Best regards
>  Ondřej Nový
>  
> Email: novy at ondrej.org <mailto:novy at ondrej.org>
> PGP: 3D98 3C52 EB85 980C 46A5  6090 3573 1255 9D1E 064B
>
>
>
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