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The neon-cluster-operator is a service that runs in every NeonKUBE cluster. It is responsible for managing the lifecycle of the cluster, including certificate rotation and security updates. Certificate rotation is the process of periodically generating new cryptographic keys and certificates for the cluster components, such as the API server, the etcd database, and the kubelet agents. This ensures that the communication between these components is secure and authenticated, and that any compromised or expired certificates are replaced. Security updates are patches or fixes that address vulnerabilities or bugs in the cluster software or operating system. The neon-cluster-operator monitors for available security updates and applies them to all nodes in the cluster automatically or on demand. This ensures that the cluster is protected from potential attacks and runs smoothly and reliably.