Any "gotchas" for upgrading redis 2.8 -> redis cluster 5.0?

[Ralph Alvarez]

I am running into replication issues with our redis 2.8 infra, and am looking at 

- upgrading to redis 5.0

- enabling redis cluster

Any hints/pitfalls/gotchas people have run into doing an upgrade?

Thank you

- (r)edis noob