On Wed, May 16, 2018 at 7:26 PM, Michael Watters <wattersm@watters.ws> wrote:
Is it possible to have multiple engines with different versions of ovirt
running in the same cluster?  I am working on a plan to upgrade our
ovirt cluster to the 4.2 release however we would like to have a
rollback plan in case there are issues with the new engine.

If this is on a production-level setup, you anyway should have a contingency plan if anything goes bad to the engine.
I recommend automated engine setup along with regular engine backup.
You can then take a backup prior to upgrade.

Y.
 
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