[ovirt-users] compatibility relationship between datacenter, ovirt and cluster

[Itamar Heim]

On 04/11/2014 10:35 PM, Tamer Lima wrote:
> ok, Itamar,  thanks.
>
> now I can understand how the things work.
>
> but I have a question based on the fact that  I have ovirt-engine on
> version 3.4  and DC and Cluster both are configured on version 3.3 :
>
> - This means that I have "available" features on version 3.4 , but these
> features just will work when I update DC and Cluster to version 3.4
> ?   (this is what I understand, following  Dafna Ron response)
>
> so, to really obtain the benefits of the new version (3.4)  I need to
> run the commands (yum update ovirt-engine-setup, engine-setup) and also
> increase the version of compatibility within the datacenter, cluster and
> host to the version 3.4
>
>
> - and what I have if only update ovirt-engine  to version 3.4 and not
> update dc, cluster neither hosts.
> I realized changes on ovirt web admin interface,  improvements on icons
> and maybe new fields.
>

some features in the engine do not require anything from 
hosts/cluster/DC, so you get them without upgrading the hosts/clusters/dc's.

for features that require an upgraded host/cluster/dc, you will only get 
them when you upgrade them accordingly.
(if you upgrade a cluster, features which are not DC level, will start 
being available post cluster upgrade, etc.)


>
>
> On Fri, Apr 11, 2014 at 9:56 AM, Itamar Heim <iheim at redhat.com
> <mailto:iheim at redhat.com>> wrote:
>
>     On 04/10/2014 10:50 PM, Tamer Lima wrote:
>
>         Hi,
>
>
>         yesterday my ovirt was 3.3
>         my datacenter and cluster (compatibility version) was aligned
>         with ovirt
>         3.3
>
>
>         today my ovirt is now 3.4.
>         and my datacenter and cluster (compatibility version) remains
>         3.3  (with
>         the option enabled to change for 3.4)
>
>         browsing the ovirt admin page I see 2 occurrences of ovirt version:
>         datacenter tab  = 3.3
>         cluster tab  =3.3
>
>
>
>         I would like to understand what means all these versions, the same
>         version for a lot of important things, and how my ovirt
>         works/behaves
>         using different versions.
>
>         all my doubts together :
>         What means datacenter in version 3.3(or lower version) when
>         ovirt is 3.4  ?
>         what means cluster in version 3.3 when ovirt is 3.4?
>         what means change the "compatibility version" for datacenter?
>         what means change the "compatibility version" for cluster?
>
>
>     Gianluca replied with links for specific features.
>     I'll reply on the general concept:
>     - a host can be upgraded to a specific 3.x version. it can be in any
>        3.y cluster which is <= 3.x
>        once the host is upgraded, 3.x host-level features can be used
>     - a cluster can be upgraded to 3.x once all active hosts in it are at
>        least with 3.x.
>        once the cluster is upgraded, 3.x cluster-level features can be used
>     - a data cetner can be upgaeded to 3.x once all clusters in it are at
>        least with 3.x
>        once the DC is upgraded, 3.x DC-level features can be used
>
>     i don't think we have it clearly documented per feture if it is host
>     level, cluster level or DC level. when in doubt, ask...
>
>
>
>
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