This document summarizes the key architecture and features of the KStar PaaS platform based on Kubernetes. It describes the technical architecture including the KStar cluster management, APaaS overview, user management, CI/CD, and monitoring/logging components. The cluster management manages Kubernetes clusters on-premises or in cloud vendors like EKS, AKS, and GKE. The APaaS provides services for users, applications, catalogs, CI/CD, registry, dashboard, and monitoring. It uses technologies like Kubernetes, ETCD, Prometheus, Grafana, Elasticsearch, and Kibana.