[Engine-devel] Question about host compatibility version

[Andrew Cathrow]

----- Original Message -----
> From: "Ashok Vemuri" <ashok at vemuris.com>
> To: engine-devel at ovirt.org
> Sent: Tuesday, May 29, 2012 2:47:55 PM
> Subject: [Engine-devel] Question about host compatibility version
> 
> 
> 
> Hello,
> 
> 
> I have a newbie question regarding host/cluster compatibility
> versions. I hope someone could clarify this for me.
> 
> 
> We have an old lab setup in which we were managing KVM hostnodes
> using RHEV Manager ( version 2.2.4.51796 ) . We are now trying to
> upgrade to the latest version of oVirt Engine ( version
> 3.1.0_0001-1.8.el6 ).
> 
> 
> Now, when I add the old KVM node to oVirt Engine, I am getting
> following error message:
> Host's Compatibility Version doesn't match the Cluster's
> Compatibility Version
> Can someone tell me if oVirt Engine is backward-compatible with older
> hostnodes? Or do I need to upgrade one or more components (such as
> VDSM) on the hostnode to be compatible with new engine?
> 
> 

oVirt 3.1 will support 3.0 and 3.1 cluster levels, but it looks like you're trying to mix RHEV 2.2 RHEV hypervisors with oVirt 3.1, that's not going to work. 
I've never tried mixing RHEV 2.2 and oVirt 3.0, it might work in theory but for sure RHEV 2.2 and oVirt 3.1 will not work.


> Here is the version information from the hostnode I'm trying to add:
> 
> 
> OS : RHEV Hypervisor - 5.6 - 9.3.el5_6
> Kernel : 2.6.18 - 238.5.1.el5
> KVM : 83 - 224.el5
> VDSM : 2.2.63.23
> SPICE : 0.3.0 - 54.el5_5.2
> 
> 
> Thanks,
> Ashok
> 
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