How the Kubernetes ReplicationController works: 
Have you ever wondered what is responsible for supervising and managing just the exact number of pods running inside the Kubernetes cluster? Kubernetes can do this in multiple ways, but one common approach is using ReplicationController (rc). A ReplicationController is responsible for managing the pod lifecycle and ensuring that the specified number of pods required are running at any given time. On the other hand, it is not responsible for the advanced cluster capabilities like performing auto-scaling, readiness and liveliness probes, and other advanced replication capabilities.
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