[PATCH] Do not allow different versions of ctdb in a cluster

[Christopher R. Hertel]

Amitay,

What about rolling upgrades?  When the goal is to upgrade a running cluster
to the latest and greatest, will we need to set AllowMixedVersions first and
then perform the upgrade?  Will that even work?

Chris -)-----

On 05/22/2017 11:40 PM, Amitay Isaacs via samba-technical wrote:
> Hi,
> 
> Till now there has never been a check to ensure that compatible ctdb
> versions are running in a cluster.  We allowed different versions of ctdb
> in a cluster.  This patch set adds a check to ensure that a cluster has
> compatible versions of ctdb.
> 
> As a general rule, ctdb with same major and minor versions will be
> compatible.
> 
> However allow the flexibility of mixing versions if you know what you are
> doing via new tunable AllowMixedVersions.
> 
> Please review and push.
> 
> These patches are dependent on the set of patches posted previously
> (simplify generation of version header files in ctdb build).
> 
> Amitay.
>