The article reviews security best practices for DigitalOcean Kubernetes (DOKS) clusters, focusing on preventative measures to secure services and data. It highlights three fundamental security concepts: Zero Trust, Least Privilege, and Encryption at Rest/Encrypted in Transit. The article emphasizes the importance of network policies, service meshes like Istio or Linkerd, and secret management solutions using tools like HashiCorp Vault. Additionally, it discusses how to secure containers by limiting elevated permissions and using seccomp profiles. The article concludes that while these practices are essential, automating security measures with guardrails (like Open Policy Agent) is crucial for ensuring consistent security across the cluster.