Open Stack

On 04.07.2017 17:13, rag.open.net at openmailbox.org wrote:
> Hi, I have a doubt regarding the upgrade of openstack, it is possible to 
> upgrade from an old version or an updated one without going through the 
> intermediate versions.
> Example: kilo to newton
> Or it must be incremental kilo, liberty, mitaka, newton.
> 
> In my experience I always did them incrementally, but I wanted to know 
> if someone performed the process directly A-> D instead of A-B-C-> D.
> Thanks.
> 
> 
> 
> 
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> 

AFAIK you still have to update from major version to major version. With
your example, this means: kilo -> liberty -> mitaka -> newton

For the sake of completeness, "Ocata" is the latest stable release (Feb.
2017) and "Pike" will be the next release (Aug. 2017):
https://releases.openstack.org/

The main reasons for this incremental update (IIUC):
* database schema updates (and sometimes data migration)
* deprecation/renaming of config options

For the config options I'd like to point you to the (little known)
tables of "New, updated, and deprecated config options":

* Nova - Kilo:

https://docs.openstack.org/kilo/config-reference/content/nova-conf-changes-kilo.html
* Nova - Liberty:

https://docs.openstack.org/liberty/config-reference/content/nova-conf-changes-liberty.html
* Nova - Mitaka: (note the change in the URLs 'style')

https://docs.openstack.org/mitaka/config-reference/tables/conf-changes/nova.html
* Nova - Newton:

https://docs.openstack.org/newton/config-reference/tables/conf-changes/nova.html
* Nova - Ocata:

https://docs.openstack.org/ocata/config-reference/tables/conf-changes/nova.html
* and so forth for the other projects ...


-- 
Regards, Markus Zoeller (markus_z)