Server setup for best performance Wordpress site

Looking for guidance in optimizing backend to host sites for clients. We have a Kubernetes cluster that we use to deploy applications into production, and would like to utilize docker/kubernetes for Wordpress.

Anyone have any experience with OpenLiteSpeed and LScache performance with Wordpress. LiteSpeed has Wordpress stats on their website, but they seem too good to be true. Is OpenLiteSpeed + LScache really better than Nginx + FastCGI?

Also, is Redis worth it for smaller sites, or would that be overkill?

issue got solved!!!