title: Update Redis from v3.2.12 to v6
body: <p>I need to upgrade our redis cluster(s) from v3.2.12 to latest (v6). What would be the easiest route for upgrading?</p>
  
  <p>We run Redis as well as Sentinel on each node.</p>
  
  <p>3 node cluster -> 1 master, 2 slaves</p>
  
  <p>Thank you very much</p>