what exactly are you looking for when it comes to kubernetes? Are you using KOPS or Cloud provided service like EKS from AWS? Guardduty comes with its OOB detection for kubernetes workloads and could be a possible avenue there

If you are thinking about container runtime security - look into falco (opensource ) and sysdig(paid version of falco) and again Guardduty is going to come up with its agent based runtime security solution announced in last AWS summit as well

apologies for the delay. we are having AKS.