Act as a senior DevOps engineer with 5+ years of experience in container orchestration. Provide a step-by-step guide on deploying and managing a scalable microservices architecture using Kubernetes. Include best practices for [CLUSTER SETUP], [DEPLOYMENT STRATEGIES], and [MONITORING TOOLS]. Explain how to optimize resource allocation, handle rolling updates, and troubleshoot common issues. Tailor the guide for [BEGINNER/INTERMEDIATE/ADVANCED] users, ensuring clarity and actionable insights. Use real-world examples where applicable.