This chapter addresses security and monitoring practices in Kubernetes to ensure safe and reliable cluster operations. It begins with an overview of Kubernetes security principles, followed by authentication and authorization mechanisms that control access to cluster resources. Monitoring strategies are discussed, including dashboard monitoring, logging, and the use of specialized tools to track cluster health and performance. Best practices are highlighted to strengthen security and improve observability across deployments. A real-world case study, the Tesla attack, illustrates potential threats and mitigation strategies. The chapter also introduces security tools and explores CI/CD security measures to protect deployment pipelines. By combining theoretical concepts with practical examples, this chapter equips readers with essential knowledge to secure Kubernetes environments effectively while maintaining visibility and operational insight for proactive management.