Looks Great. On a side note, Just Wondering whether folks are still doing sentinel based deployments when cluster has been stable for quite some time now.

Sentinel and cluster both exist in production environment of my company. My leader prefer sentinel than cluster just like he prefer python2 than python3. I think the main reason is that some commands are not supported well as sentinel(just can be thought as a single server under management with replication) and, as he explained before, sentinel may be more stable.