Replica sets is to ensure defined no. of identical pods are always available, even if some of the pods gets corrupted and becomes unavailable, it is restarted by replica sets again. Example – In case of node failure where 1 node fails, replica-set ensure, pods of that node is started in another node. In case of deployment rollout, replica sets ensure new pods gets created with new version.

What is Kubernetes:Kubernetes is born in google and later purchased by cncf and has a wide community support.Its a container orchestration which manages containers.helps provisioning and deployment of containers in pods.helps ensuring containers are up and running at all times through health checks.ensures all the pods are functioning properly by distributing load evenly between them.provides self-healing / auto-scaling capabilities.Provides cluster capabilities for High availability of kubernetes master.it provides 4 major components which helps control plane manages all worker nodesKubernetes works